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crc: refactor SSE CRC64 implementations to use common code
Change-Id: I2d141f2ccd12ab338783e50736e36ed4aeb11f7f Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
This commit is contained in:
Pablo de Lara
parent
22d33cf795
commit
16056ff4e4
@ -27,484 +27,9 @@
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; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Function API:
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%define FUNCTION_NAME crc64_ecma_norm_by8
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; uint64_t crc64_ecma_norm_by8(
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%define USE_CONSTS
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; uint64_t init_crc, //initial CRC value, 64 bits
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%macro INCLUDE_CONSTS 0
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; const unsigned char *buf, //buffer pointer to calculate CRC on
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; uint64_t len //buffer length in bytes (64-bit data)
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; );
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;
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; yasm -f x64 -f elf64 -X gnu -g dwarf2 crc64_ecma_norm_by8
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%include "reg_sizes.asm"
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%define fetch_dist 1024
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[bits 64]
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default rel
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section .text
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%ifidn __OUTPUT_FORMAT__, win64
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%xdefine arg1 rcx
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%xdefine arg2 rdx
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%xdefine arg3 r8
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%else
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%xdefine arg1 rdi
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%xdefine arg2 rsi
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%xdefine arg3 rdx
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%endif
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%define TMP 16*0
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%ifidn __OUTPUT_FORMAT__, win64
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%define XMM_SAVE 16*2
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%define VARIABLE_OFFSET 16*10+8
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%else
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%define VARIABLE_OFFSET 16*2+8
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%endif
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align 16
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mk_global crc64_ecma_norm_by8, function
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crc64_ecma_norm_by8:
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endbranch
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not arg1 ;~init_crc
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sub rsp,VARIABLE_OFFSET
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%ifidn __OUTPUT_FORMAT__, win64
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; push the xmm registers into the stack to maintain
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movdqa [rsp + XMM_SAVE + 16*0], xmm6
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movdqa [rsp + XMM_SAVE + 16*1], xmm7
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movdqa [rsp + XMM_SAVE + 16*2], xmm8
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movdqa [rsp + XMM_SAVE + 16*3], xmm9
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movdqa [rsp + XMM_SAVE + 16*4], xmm10
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movdqa [rsp + XMM_SAVE + 16*5], xmm11
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movdqa [rsp + XMM_SAVE + 16*6], xmm12
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movdqa [rsp + XMM_SAVE + 16*7], xmm13
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%endif
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; check if smaller than 256
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cmp arg3, 256
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; for sizes less than 256, we can't fold 128B at a time...
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jl _less_than_256
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; load the initial crc value
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movq xmm10, arg1 ; initial crc
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; crc value does not need to be byte-reflected, but it needs to be moved to the high part of the register.
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; because data will be byte-reflected and will align with initial crc at correct place.
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pslldq xmm10, 8
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movdqa xmm11, [SHUF_MASK]
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; receive the initial 128B data, xor the initial crc value
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movdqu xmm0, [arg2+16*0]
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movdqu xmm1, [arg2+16*1]
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movdqu xmm2, [arg2+16*2]
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movdqu xmm3, [arg2+16*3]
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movdqu xmm4, [arg2+16*4]
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movdqu xmm5, [arg2+16*5]
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movdqu xmm6, [arg2+16*6]
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movdqu xmm7, [arg2+16*7]
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pshufb xmm0, xmm11
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; XOR the initial_crc value
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pxor xmm0, xmm10
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pshufb xmm1, xmm11
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pshufb xmm2, xmm11
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pshufb xmm3, xmm11
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pshufb xmm4, xmm11
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pshufb xmm5, xmm11
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pshufb xmm6, xmm11
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pshufb xmm7, xmm11
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movdqa xmm10, [rk3] ;xmm10 has rk3 and rk4
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;imm value of pclmulqdq instruction will determine which constant to use
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; we subtract 256 instead of 128 to save one instruction from the loop
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sub arg3, 256
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; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The _fold_128_B_loop
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; loop will fold 128B at a time until we have 128+y Bytes of buffer
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; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
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_fold_128_B_loop:
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; update the buffer pointer
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add arg2, 128 ; buf += 128;
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prefetchnta [arg2+fetch_dist+0]
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movdqu xmm9, [arg2+16*0]
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movdqu xmm12, [arg2+16*1]
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pshufb xmm9, xmm11
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pshufb xmm12, xmm11
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movdqa xmm8, xmm0
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movdqa xmm13, xmm1
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pclmulqdq xmm0, xmm10, 0x0
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pclmulqdq xmm8, xmm10 , 0x11
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pclmulqdq xmm1, xmm10, 0x0
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pclmulqdq xmm13, xmm10 , 0x11
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pxor xmm0, xmm9
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xorps xmm0, xmm8
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pxor xmm1, xmm12
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xorps xmm1, xmm13
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prefetchnta [arg2+fetch_dist+32]
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movdqu xmm9, [arg2+16*2]
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movdqu xmm12, [arg2+16*3]
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pshufb xmm9, xmm11
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pshufb xmm12, xmm11
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movdqa xmm8, xmm2
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movdqa xmm13, xmm3
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pclmulqdq xmm2, xmm10, 0x0
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pclmulqdq xmm8, xmm10 , 0x11
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pclmulqdq xmm3, xmm10, 0x0
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pclmulqdq xmm13, xmm10 , 0x11
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pxor xmm2, xmm9
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xorps xmm2, xmm8
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pxor xmm3, xmm12
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xorps xmm3, xmm13
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prefetchnta [arg2+fetch_dist+64]
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movdqu xmm9, [arg2+16*4]
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movdqu xmm12, [arg2+16*5]
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pshufb xmm9, xmm11
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pshufb xmm12, xmm11
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movdqa xmm8, xmm4
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movdqa xmm13, xmm5
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pclmulqdq xmm4, xmm10, 0x0
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pclmulqdq xmm8, xmm10 , 0x11
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pclmulqdq xmm5, xmm10, 0x0
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pclmulqdq xmm13, xmm10 , 0x11
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pxor xmm4, xmm9
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xorps xmm4, xmm8
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pxor xmm5, xmm12
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xorps xmm5, xmm13
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prefetchnta [arg2+fetch_dist+96]
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movdqu xmm9, [arg2+16*6]
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movdqu xmm12, [arg2+16*7]
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pshufb xmm9, xmm11
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pshufb xmm12, xmm11
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movdqa xmm8, xmm6
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movdqa xmm13, xmm7
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pclmulqdq xmm6, xmm10, 0x0
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pclmulqdq xmm8, xmm10 , 0x11
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pclmulqdq xmm7, xmm10, 0x0
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pclmulqdq xmm13, xmm10 , 0x11
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pxor xmm6, xmm9
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xorps xmm6, xmm8
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pxor xmm7, xmm12
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xorps xmm7, xmm13
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sub arg3, 128
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; check if there is another 128B in the buffer to be able to fold
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jge _fold_128_B_loop
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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add arg2, 128
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; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
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; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
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; fold the 8 xmm registers to 1 xmm register with different constants
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movdqa xmm10, [rk9]
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movdqa xmm8, xmm0
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pclmulqdq xmm0, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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xorps xmm7, xmm0
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movdqa xmm10, [rk11]
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movdqa xmm8, xmm1
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pclmulqdq xmm1, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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xorps xmm7, xmm1
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movdqa xmm10, [rk13]
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movdqa xmm8, xmm2
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pclmulqdq xmm2, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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pxor xmm7, xmm2
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movdqa xmm10, [rk15]
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movdqa xmm8, xmm3
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pclmulqdq xmm3, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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xorps xmm7, xmm3
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movdqa xmm10, [rk17]
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movdqa xmm8, xmm4
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pclmulqdq xmm4, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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pxor xmm7, xmm4
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movdqa xmm10, [rk19]
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movdqa xmm8, xmm5
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pclmulqdq xmm5, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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xorps xmm7, xmm5
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movdqa xmm10, [rk1] ;xmm10 has rk1 and rk2
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movdqa xmm8, xmm6
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pclmulqdq xmm6, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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pxor xmm7, xmm6
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; instead of 128, we add 112 to the loop counter to save 1 instruction from the loop
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; instead of a cmp instruction, we use the negative flag with the jl instruction
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add arg3, 128-16
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jl _final_reduction_for_128
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; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 and the rest is in memory
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; we can fold 16 bytes at a time if y>=16
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; continue folding 16B at a time
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_16B_reduction_loop:
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movdqa xmm8, xmm7
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pclmulqdq xmm7, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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movdqu xmm0, [arg2]
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pshufb xmm0, xmm11
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pxor xmm7, xmm0
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add arg2, 16
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sub arg3, 16
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; instead of a cmp instruction, we utilize the flags with the jge instruction
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; equivalent of: cmp arg3, 16-16
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; check if there is any more 16B in the buffer to be able to fold
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jge _16B_reduction_loop
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;now we have 16+z bytes left to reduce, where 0<= z < 16.
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;first, we reduce the data in the xmm7 register
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_final_reduction_for_128:
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; check if any more data to fold. If not, compute the CRC of the final 128 bits
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add arg3, 16
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je _128_done
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; here we are getting data that is less than 16 bytes.
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; since we know that there was data before the pointer, we can offset the input pointer before the actual point, to receive exactly 16 bytes.
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; after that the registers need to be adjusted.
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_get_last_two_xmms:
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movdqa xmm2, xmm7
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movdqu xmm1, [arg2 - 16 + arg3]
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pshufb xmm1, xmm11
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; get rid of the extra data that was loaded before
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; load the shift constant
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lea rax, [pshufb_shf_table + 16]
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sub rax, arg3
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movdqu xmm0, [rax]
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; shift xmm2 to the left by arg3 bytes
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pshufb xmm2, xmm0
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; shift xmm7 to the right by 16-arg3 bytes
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pxor xmm0, [mask1]
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pshufb xmm7, xmm0
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pblendvb xmm1, xmm2 ;xmm0 is implicit
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; fold 16 Bytes
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movdqa xmm2, xmm1
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movdqa xmm8, xmm7
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pclmulqdq xmm7, xmm10, 0x11
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pclmulqdq xmm8, xmm10, 0x0
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pxor xmm7, xmm8
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pxor xmm7, xmm2
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_128_done:
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; compute crc of a 128-bit value
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movdqa xmm10, [rk5] ; rk5 and rk6 in xmm10
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movdqa xmm0, xmm7
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;64b fold
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pclmulqdq xmm7, xmm10, 0x01 ; H*L
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pslldq xmm0, 8
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pxor xmm7, xmm0
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;barrett reduction
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_barrett:
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movdqa xmm10, [rk7] ; rk7 and rk8 in xmm10
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movdqa xmm0, xmm7
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movdqa xmm1, xmm7
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pand xmm1, [mask3]
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pclmulqdq xmm7, xmm10, 0x01
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pxor xmm7, xmm1
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pclmulqdq xmm7, xmm10, 0x11
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pxor xmm7, xmm0
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pextrq rax, xmm7, 0
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_cleanup:
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not rax
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%ifidn __OUTPUT_FORMAT__, win64
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movdqa xmm6, [rsp + XMM_SAVE + 16*0]
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movdqa xmm7, [rsp + XMM_SAVE + 16*1]
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movdqa xmm8, [rsp + XMM_SAVE + 16*2]
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movdqa xmm9, [rsp + XMM_SAVE + 16*3]
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movdqa xmm10, [rsp + XMM_SAVE + 16*4]
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movdqa xmm11, [rsp + XMM_SAVE + 16*5]
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movdqa xmm12, [rsp + XMM_SAVE + 16*6]
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movdqa xmm13, [rsp + XMM_SAVE + 16*7]
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%endif
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add rsp, VARIABLE_OFFSET
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ret
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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||||||
align 16
|
|
||||||
_less_than_256:
|
|
||||||
|
|
||||||
; check if there is enough buffer to be able to fold 16B at a time
|
|
||||||
cmp arg3, 32
|
|
||||||
jl _less_than_32
|
|
||||||
movdqa xmm11, [SHUF_MASK]
|
|
||||||
|
|
||||||
; if there is, load the constants
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
pslldq xmm0, 8 ; align it to its correct place
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pshufb xmm7, xmm11 ; byte-reflect the plaintext
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 16
|
|
||||||
|
|
||||||
; update the counter. subtract 32 instead of 16 to save one instruction from the loop
|
|
||||||
sub arg3, 32
|
|
||||||
|
|
||||||
jmp _16B_reduction_loop
|
|
||||||
align 16
|
|
||||||
_less_than_32:
|
|
||||||
; mov initial crc to the return value. this is necessary for zero-length buffers.
|
|
||||||
mov rax, arg1
|
|
||||||
test arg3, arg3
|
|
||||||
je _cleanup
|
|
||||||
|
|
||||||
movdqa xmm11, [SHUF_MASK]
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
pslldq xmm0, 8 ; align it to its correct place
|
|
||||||
|
|
||||||
cmp arg3, 16
|
|
||||||
je _exact_16_left
|
|
||||||
jl _less_than_16_left
|
|
||||||
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pshufb xmm7, xmm11 ; byte-reflect the plaintext
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
jmp _get_last_two_xmms
|
|
||||||
align 16
|
|
||||||
_less_than_16_left:
|
|
||||||
; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
|
|
||||||
pxor xmm1, xmm1
|
|
||||||
mov r11, rsp
|
|
||||||
movdqa [r11], xmm1
|
|
||||||
|
|
||||||
; backup the counter value
|
|
||||||
mov r9, arg3
|
|
||||||
cmp arg3, 8
|
|
||||||
jl _less_than_8_left
|
|
||||||
|
|
||||||
; load 8 Bytes
|
|
||||||
mov rax, [arg2]
|
|
||||||
mov [r11], rax
|
|
||||||
add r11, 8
|
|
||||||
sub arg3, 8
|
|
||||||
add arg2, 8
|
|
||||||
_less_than_8_left:
|
|
||||||
|
|
||||||
cmp arg3, 4
|
|
||||||
jl _less_than_4_left
|
|
||||||
|
|
||||||
; load 4 Bytes
|
|
||||||
mov eax, [arg2]
|
|
||||||
mov [r11], eax
|
|
||||||
add r11, 4
|
|
||||||
sub arg3, 4
|
|
||||||
add arg2, 4
|
|
||||||
_less_than_4_left:
|
|
||||||
|
|
||||||
cmp arg3, 2
|
|
||||||
jl _less_than_2_left
|
|
||||||
|
|
||||||
; load 2 Bytes
|
|
||||||
mov ax, [arg2]
|
|
||||||
mov [r11], ax
|
|
||||||
add r11, 2
|
|
||||||
sub arg3, 2
|
|
||||||
add arg2, 2
|
|
||||||
_less_than_2_left:
|
|
||||||
cmp arg3, 1
|
|
||||||
jl _zero_left
|
|
||||||
|
|
||||||
; load 1 Byte
|
|
||||||
mov al, [arg2]
|
|
||||||
mov [r11], al
|
|
||||||
_zero_left:
|
|
||||||
movdqa xmm7, [rsp]
|
|
||||||
pshufb xmm7, xmm11
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
; shl r9, 4
|
|
||||||
lea rax, [pshufb_shf_table + 16]
|
|
||||||
sub rax, r9
|
|
||||||
|
|
||||||
cmp r9, 8
|
|
||||||
jl _end_1to7
|
|
||||||
|
|
||||||
_end_8to15:
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
pxor xmm0, [mask1]
|
|
||||||
|
|
||||||
pshufb xmm7, xmm0
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
_end_1to7:
|
|
||||||
; Right shift (8-length) bytes in XMM
|
|
||||||
add rax, 8
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
|
|
||||||
jmp _barrett
|
|
||||||
align 16
|
|
||||||
_exact_16_left:
|
|
||||||
movdqu xmm7, [arg2]
|
|
||||||
pshufb xmm7, xmm11
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
section .data
|
|
||||||
|
|
||||||
; precomputed constants
|
|
||||||
align 16
|
|
||||||
|
|
||||||
rk1 :
|
rk1 :
|
||||||
DQ 0x5f5c3c7eb52fab6
|
DQ 0x5f5c3c7eb52fab6
|
||||||
rk2 :
|
rk2 :
|
||||||
@ -545,37 +70,6 @@ rk19 :
|
|||||||
DQ 0x571bee0a227ef92b
|
DQ 0x571bee0a227ef92b
|
||||||
rk20 :
|
rk20 :
|
||||||
DQ 0x44bef2a201b5200c
|
DQ 0x44bef2a201b5200c
|
||||||
|
%endm
|
||||||
|
|
||||||
|
%include "crc64_iso_norm_by8.asm"
|
||||||
mask1:
|
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
mask2:
|
|
||||||
dq 0xFFFFFFFFFFFFFFFF, 0x00000000FFFFFFFF
|
|
||||||
mask3:
|
|
||||||
dq 0x0000000000000000, 0xFFFFFFFFFFFFFFFF
|
|
||||||
|
|
||||||
SHUF_MASK:
|
|
||||||
dq 0x08090A0B0C0D0E0F, 0x0001020304050607
|
|
||||||
|
|
||||||
pshufb_shf_table:
|
|
||||||
; use these values for shift constants for the pshufb instruction
|
|
||||||
; different alignments result in values as shown:
|
|
||||||
; dq 0x8887868584838281, 0x008f8e8d8c8b8a89 ; shl 15 (16-1) / shr1
|
|
||||||
; dq 0x8988878685848382, 0x01008f8e8d8c8b8a ; shl 14 (16-3) / shr2
|
|
||||||
; dq 0x8a89888786858483, 0x0201008f8e8d8c8b ; shl 13 (16-4) / shr3
|
|
||||||
; dq 0x8b8a898887868584, 0x030201008f8e8d8c ; shl 12 (16-4) / shr4
|
|
||||||
; dq 0x8c8b8a8988878685, 0x04030201008f8e8d ; shl 11 (16-5) / shr5
|
|
||||||
; dq 0x8d8c8b8a89888786, 0x0504030201008f8e ; shl 10 (16-6) / shr6
|
|
||||||
; dq 0x8e8d8c8b8a898887, 0x060504030201008f ; shl 9 (16-7) / shr7
|
|
||||||
; dq 0x8f8e8d8c8b8a8988, 0x0706050403020100 ; shl 8 (16-8) / shr8
|
|
||||||
; dq 0x008f8e8d8c8b8a89, 0x0807060504030201 ; shl 7 (16-9) / shr9
|
|
||||||
; dq 0x01008f8e8d8c8b8a, 0x0908070605040302 ; shl 6 (16-10) / shr10
|
|
||||||
; dq 0x0201008f8e8d8c8b, 0x0a09080706050403 ; shl 5 (16-11) / shr11
|
|
||||||
; dq 0x030201008f8e8d8c, 0x0b0a090807060504 ; shl 4 (16-12) / shr12
|
|
||||||
; dq 0x04030201008f8e8d, 0x0c0b0a0908070605 ; shl 3 (16-13) / shr13
|
|
||||||
; dq 0x0504030201008f8e, 0x0d0c0b0a09080706 ; shl 2 (16-14) / shr14
|
|
||||||
; dq 0x060504030201008f, 0x0e0d0c0b0a090807 ; shl 1 (16-15) / shr15
|
|
||||||
dq 0x8786858483828100, 0x8f8e8d8c8b8a8988
|
|
||||||
dq 0x0706050403020100, 0x0f0e0d0c0b0a0908
|
|
||||||
dq 0x8080808080808080, 0x0f0e0d0c0b0a0908
|
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
|
|||||||
@ -27,453 +27,9 @@
|
|||||||
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
%define FUNCTION_NAME crc64_ecma_refl_by8
|
||||||
; Function API:
|
%define USE_CONSTS
|
||||||
; uint64_t crc64_ecma_refl_by8(
|
%macro INCLUDE_CONSTS 0
|
||||||
; uint64_t init_crc, //initial CRC value, 64 bits
|
|
||||||
; const unsigned char *buf, //buffer pointer to calculate CRC on
|
|
||||||
; uint64_t len //buffer length in bytes (64-bit data)
|
|
||||||
; );
|
|
||||||
;
|
|
||||||
; Reference paper titled "Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction"
|
|
||||||
; sample yasm command line:
|
|
||||||
; yasm -f x64 -f elf64 -X gnu -g dwarf2 crc64_ecma_refl_by8
|
|
||||||
%include "reg_sizes.asm"
|
|
||||||
|
|
||||||
%define fetch_dist 1024
|
|
||||||
|
|
||||||
[bits 64]
|
|
||||||
default rel
|
|
||||||
|
|
||||||
section .text
|
|
||||||
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%xdefine arg1 rcx
|
|
||||||
%xdefine arg2 rdx
|
|
||||||
%xdefine arg3 r8
|
|
||||||
%else
|
|
||||||
%xdefine arg1 rdi
|
|
||||||
%xdefine arg2 rsi
|
|
||||||
%xdefine arg3 rdx
|
|
||||||
%endif
|
|
||||||
|
|
||||||
%define TMP 16*0
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%define XMM_SAVE 16*2
|
|
||||||
%define VARIABLE_OFFSET 16*10+8
|
|
||||||
%else
|
|
||||||
%define VARIABLE_OFFSET 16*2+8
|
|
||||||
%endif
|
|
||||||
|
|
||||||
|
|
||||||
align 16
|
|
||||||
mk_global crc64_ecma_refl_by8, function
|
|
||||||
crc64_ecma_refl_by8:
|
|
||||||
endbranch
|
|
||||||
; uint64_t c = crc ^ 0xffffffff,ffffffffL;
|
|
||||||
not arg1
|
|
||||||
sub rsp, VARIABLE_OFFSET
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
; push the xmm registers into the stack to maintain
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*0], xmm6
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*1], xmm7
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*2], xmm8
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*3], xmm9
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*4], xmm10
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*5], xmm11
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*6], xmm12
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*7], xmm13
|
|
||||||
%endif
|
|
||||||
|
|
||||||
; check if smaller than 256B
|
|
||||||
cmp arg3, 256
|
|
||||||
|
|
||||||
; for sizes less than 256, we can't fold 128B at a time...
|
|
||||||
jl _less_than_256
|
|
||||||
|
|
||||||
|
|
||||||
; load the initial crc value
|
|
||||||
movq xmm10, arg1 ; initial crc
|
|
||||||
; receive the initial 128B data, xor the initial crc value
|
|
||||||
movdqu xmm0, [arg2+16*0]
|
|
||||||
movdqu xmm1, [arg2+16*1]
|
|
||||||
movdqu xmm2, [arg2+16*2]
|
|
||||||
movdqu xmm3, [arg2+16*3]
|
|
||||||
movdqu xmm4, [arg2+16*4]
|
|
||||||
movdqu xmm5, [arg2+16*5]
|
|
||||||
movdqu xmm6, [arg2+16*6]
|
|
||||||
movdqu xmm7, [arg2+16*7]
|
|
||||||
|
|
||||||
; XOR the initial_crc value
|
|
||||||
pxor xmm0, xmm10
|
|
||||||
movdqa xmm10, [rk3] ;xmm10 has rk3 and rk4
|
|
||||||
;imm value of pclmulqdq instruction will determine which constant to use
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
; we subtract 256 instead of 128 to save one instruction from the loop
|
|
||||||
sub arg3, 256
|
|
||||||
|
|
||||||
; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The _fold_128_B_loop
|
|
||||||
; loop will fold 128B at a time until we have 128+y Bytes of buffer
|
|
||||||
|
|
||||||
|
|
||||||
; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
|
|
||||||
_fold_128_B_loop:
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 128
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+0]
|
|
||||||
movdqu xmm9, [arg2+16*0]
|
|
||||||
movdqu xmm12, [arg2+16*1]
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
movdqa xmm13, xmm1
|
|
||||||
pclmulqdq xmm0, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm1, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm0, xmm9
|
|
||||||
xorps xmm0, xmm8
|
|
||||||
pxor xmm1, xmm12
|
|
||||||
xorps xmm1, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+32]
|
|
||||||
movdqu xmm9, [arg2+16*2]
|
|
||||||
movdqu xmm12, [arg2+16*3]
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
movdqa xmm13, xmm3
|
|
||||||
pclmulqdq xmm2, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm3, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm2, xmm9
|
|
||||||
xorps xmm2, xmm8
|
|
||||||
pxor xmm3, xmm12
|
|
||||||
xorps xmm3, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+64]
|
|
||||||
movdqu xmm9, [arg2+16*4]
|
|
||||||
movdqu xmm12, [arg2+16*5]
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
movdqa xmm13, xmm5
|
|
||||||
pclmulqdq xmm4, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm5, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm4, xmm9
|
|
||||||
xorps xmm4, xmm8
|
|
||||||
pxor xmm5, xmm12
|
|
||||||
xorps xmm5, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+96]
|
|
||||||
movdqu xmm9, [arg2+16*6]
|
|
||||||
movdqu xmm12, [arg2+16*7]
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
movdqa xmm13, xmm7
|
|
||||||
pclmulqdq xmm6, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm7, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm6, xmm9
|
|
||||||
xorps xmm6, xmm8
|
|
||||||
pxor xmm7, xmm12
|
|
||||||
xorps xmm7, xmm13
|
|
||||||
|
|
||||||
sub arg3, 128
|
|
||||||
|
|
||||||
; check if there is another 128B in the buffer to be able to fold
|
|
||||||
jge _fold_128_B_loop
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
add arg2, 128
|
|
||||||
; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
|
|
||||||
; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
|
|
||||||
|
|
||||||
|
|
||||||
; fold the 8 xmm registers to 1 xmm register with different constants
|
|
||||||
; xmm0 to xmm7
|
|
||||||
movdqa xmm10, [rk9]
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
pclmulqdq xmm0, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm0
|
|
||||||
;xmm1 to xmm7
|
|
||||||
movdqa xmm10, [rk11]
|
|
||||||
movdqa xmm8, xmm1
|
|
||||||
pclmulqdq xmm1, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm1
|
|
||||||
|
|
||||||
movdqa xmm10, [rk13]
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
pclmulqdq xmm2, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
movdqa xmm10, [rk15]
|
|
||||||
movdqa xmm8, xmm3
|
|
||||||
pclmulqdq xmm3, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm3
|
|
||||||
|
|
||||||
movdqa xmm10, [rk17]
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
pclmulqdq xmm4, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm4
|
|
||||||
|
|
||||||
movdqa xmm10, [rk19]
|
|
||||||
movdqa xmm8, xmm5
|
|
||||||
pclmulqdq xmm5, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm5
|
|
||||||
; xmm6 to xmm7
|
|
||||||
movdqa xmm10, [rk1]
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
pclmulqdq xmm6, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm6
|
|
||||||
|
|
||||||
|
|
||||||
; instead of 128, we add 128-16 to the loop counter to save 1 instruction from the loop
|
|
||||||
; instead of a cmp instruction, we use the negative flag with the jl instruction
|
|
||||||
add arg3, 128-16
|
|
||||||
jl _final_reduction_for_128
|
|
||||||
|
|
||||||
; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 and the rest is in memory
|
|
||||||
; we can fold 16 bytes at a time if y>=16
|
|
||||||
; continue folding 16B at a time
|
|
||||||
|
|
||||||
_16B_reduction_loop:
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
movdqu xmm0, [arg2]
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
; instead of a cmp instruction, we utilize the flags with the jge instruction
|
|
||||||
; equivalent of: cmp arg3, 16-16
|
|
||||||
; check if there is any more 16B in the buffer to be able to fold
|
|
||||||
jge _16B_reduction_loop
|
|
||||||
|
|
||||||
;now we have 16+z bytes left to reduce, where 0<= z < 16.
|
|
||||||
;first, we reduce the data in the xmm7 register
|
|
||||||
|
|
||||||
|
|
||||||
_final_reduction_for_128:
|
|
||||||
add arg3, 16
|
|
||||||
je _128_done
|
|
||||||
; here we are getting data that is less than 16 bytes.
|
|
||||||
; since we know that there was data before the pointer, we can offset the input pointer before the actual point, to receive exactly 16 bytes.
|
|
||||||
; after that the registers need to be adjusted.
|
|
||||||
_get_last_two_xmms:
|
|
||||||
|
|
||||||
|
|
||||||
movdqa xmm2, xmm7
|
|
||||||
movdqu xmm1, [arg2 - 16 + arg3]
|
|
||||||
|
|
||||||
; get rid of the extra data that was loaded before
|
|
||||||
; load the shift constant
|
|
||||||
lea rax, [pshufb_shf_table]
|
|
||||||
add rax, arg3
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
|
|
||||||
|
|
||||||
pshufb xmm7, xmm0
|
|
||||||
pxor xmm0, [mask3]
|
|
||||||
pshufb xmm2, xmm0
|
|
||||||
|
|
||||||
pblendvb xmm2, xmm1 ;xmm0 is implicit
|
|
||||||
;;;;;;;;;;
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x1
|
|
||||||
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
_128_done:
|
|
||||||
; compute crc of a 128-bit value
|
|
||||||
movdqa xmm10, [rk5]
|
|
||||||
movdqa xmm0, xmm7
|
|
||||||
|
|
||||||
;64b fold
|
|
||||||
pclmulqdq xmm7, xmm10, 0
|
|
||||||
psrldq xmm0, 8
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
;barrett reduction
|
|
||||||
_barrett:
|
|
||||||
movdqa xmm1, xmm7
|
|
||||||
movdqa xmm10, [rk7]
|
|
||||||
|
|
||||||
pclmulqdq xmm7, xmm10, 0
|
|
||||||
movdqa xmm2, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x10
|
|
||||||
pslldq xmm2, 8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
pxor xmm7, xmm1
|
|
||||||
pextrq rax, xmm7, 1
|
|
||||||
|
|
||||||
_cleanup:
|
|
||||||
; return c ^ 0xffffffff, ffffffffL;
|
|
||||||
not rax
|
|
||||||
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
movdqa xmm6, [rsp + XMM_SAVE + 16*0]
|
|
||||||
movdqa xmm7, [rsp + XMM_SAVE + 16*1]
|
|
||||||
movdqa xmm8, [rsp + XMM_SAVE + 16*2]
|
|
||||||
movdqa xmm9, [rsp + XMM_SAVE + 16*3]
|
|
||||||
movdqa xmm10, [rsp + XMM_SAVE + 16*4]
|
|
||||||
movdqa xmm11, [rsp + XMM_SAVE + 16*5]
|
|
||||||
movdqa xmm12, [rsp + XMM_SAVE + 16*6]
|
|
||||||
movdqa xmm13, [rsp + XMM_SAVE + 16*7]
|
|
||||||
%endif
|
|
||||||
add rsp, VARIABLE_OFFSET
|
|
||||||
ret
|
|
||||||
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_256:
|
|
||||||
|
|
||||||
; check if there is enough buffer to be able to fold 16B at a time
|
|
||||||
cmp arg3, 32
|
|
||||||
jl _less_than_32
|
|
||||||
|
|
||||||
; if there is, load the constants
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 16
|
|
||||||
|
|
||||||
; update the counter. subtract 32 instead of 16 to save one instruction from the loop
|
|
||||||
sub arg3, 32
|
|
||||||
|
|
||||||
jmp _16B_reduction_loop
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_32:
|
|
||||||
; mov initial crc to the return value. this is necessary for zero-length buffers.
|
|
||||||
mov rax, arg1
|
|
||||||
test arg3, arg3
|
|
||||||
je _cleanup
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
|
|
||||||
cmp arg3, 16
|
|
||||||
je _exact_16_left
|
|
||||||
jl _less_than_16_left
|
|
||||||
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
jmp _get_last_two_xmms
|
|
||||||
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_16_left:
|
|
||||||
; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
|
|
||||||
|
|
||||||
pxor xmm1, xmm1
|
|
||||||
mov r11, rsp
|
|
||||||
movdqa [r11], xmm1
|
|
||||||
|
|
||||||
; backup the counter value
|
|
||||||
mov r9, arg3
|
|
||||||
cmp arg3, 8
|
|
||||||
jl _less_than_8_left
|
|
||||||
|
|
||||||
; load 8 Bytes
|
|
||||||
mov rax, [arg2]
|
|
||||||
mov [r11], rax
|
|
||||||
add r11, 8
|
|
||||||
sub arg3, 8
|
|
||||||
add arg2, 8
|
|
||||||
_less_than_8_left:
|
|
||||||
|
|
||||||
cmp arg3, 4
|
|
||||||
jl _less_than_4_left
|
|
||||||
|
|
||||||
; load 4 Bytes
|
|
||||||
mov eax, [arg2]
|
|
||||||
mov [r11], eax
|
|
||||||
add r11, 4
|
|
||||||
sub arg3, 4
|
|
||||||
add arg2, 4
|
|
||||||
_less_than_4_left:
|
|
||||||
|
|
||||||
cmp arg3, 2
|
|
||||||
jl _less_than_2_left
|
|
||||||
|
|
||||||
; load 2 Bytes
|
|
||||||
mov ax, [arg2]
|
|
||||||
mov [r11], ax
|
|
||||||
add r11, 2
|
|
||||||
sub arg3, 2
|
|
||||||
add arg2, 2
|
|
||||||
_less_than_2_left:
|
|
||||||
cmp arg3, 1
|
|
||||||
jl _zero_left
|
|
||||||
|
|
||||||
; load 1 Byte
|
|
||||||
mov al, [arg2]
|
|
||||||
mov [r11], al
|
|
||||||
|
|
||||||
_zero_left:
|
|
||||||
movdqa xmm7, [rsp]
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
lea rax,[pshufb_shf_table]
|
|
||||||
|
|
||||||
cmp r9, 8
|
|
||||||
jl _end_1to7
|
|
||||||
|
|
||||||
_end_8to15:
|
|
||||||
movdqu xmm0, [rax + r9]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
_end_1to7:
|
|
||||||
; Left shift (8-length) bytes in XMM
|
|
||||||
movdqu xmm0, [rax + r9 + 8]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
|
|
||||||
jmp _barrett
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_exact_16_left:
|
|
||||||
movdqu xmm7, [arg2]
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
section .data
|
|
||||||
|
|
||||||
; precomputed constants
|
|
||||||
align 16
|
|
||||||
; rk7 = floor(2^128/Q)
|
|
||||||
; rk8 = Q
|
|
||||||
rk1 :
|
rk1 :
|
||||||
DQ 0xdabe95afc7875f40
|
DQ 0xdabe95afc7875f40
|
||||||
rk2 :
|
rk2 :
|
||||||
@ -514,33 +70,6 @@ rk19 :
|
|||||||
DQ 0x3be653a30fe1af51
|
DQ 0x3be653a30fe1af51
|
||||||
rk20 :
|
rk20 :
|
||||||
DQ 0x60095b008a9efa44
|
DQ 0x60095b008a9efa44
|
||||||
|
%endm
|
||||||
|
|
||||||
|
%include "crc64_iso_refl_by8.asm"
|
||||||
pshufb_shf_table:
|
|
||||||
; use these values for shift constants for the pshufb instruction
|
|
||||||
; different alignments result in values as shown:
|
|
||||||
; dq 0x8887868584838281, 0x008f8e8d8c8b8a89 ; shl 15 (16-1) / shr1
|
|
||||||
; dq 0x8988878685848382, 0x01008f8e8d8c8b8a ; shl 14 (16-3) / shr2
|
|
||||||
; dq 0x8a89888786858483, 0x0201008f8e8d8c8b ; shl 13 (16-4) / shr3
|
|
||||||
; dq 0x8b8a898887868584, 0x030201008f8e8d8c ; shl 12 (16-4) / shr4
|
|
||||||
; dq 0x8c8b8a8988878685, 0x04030201008f8e8d ; shl 11 (16-5) / shr5
|
|
||||||
; dq 0x8d8c8b8a89888786, 0x0504030201008f8e ; shl 10 (16-6) / shr6
|
|
||||||
; dq 0x8e8d8c8b8a898887, 0x060504030201008f ; shl 9 (16-7) / shr7
|
|
||||||
; dq 0x8f8e8d8c8b8a8988, 0x0706050403020100 ; shl 8 (16-8) / shr8
|
|
||||||
; dq 0x008f8e8d8c8b8a89, 0x0807060504030201 ; shl 7 (16-9) / shr9
|
|
||||||
; dq 0x01008f8e8d8c8b8a, 0x0908070605040302 ; shl 6 (16-10) / shr10
|
|
||||||
; dq 0x0201008f8e8d8c8b, 0x0a09080706050403 ; shl 5 (16-11) / shr11
|
|
||||||
; dq 0x030201008f8e8d8c, 0x0b0a090807060504 ; shl 4 (16-12) / shr12
|
|
||||||
; dq 0x04030201008f8e8d, 0x0c0b0a0908070605 ; shl 3 (16-13) / shr13
|
|
||||||
; dq 0x0504030201008f8e, 0x0d0c0b0a09080706 ; shl 2 (16-14) / shr14
|
|
||||||
; dq 0x060504030201008f, 0x0e0d0c0b0a090807 ; shl 1 (16-15) / shr15
|
|
||||||
dq 0x8786858483828100, 0x8f8e8d8c8b8a8988
|
|
||||||
dq 0x0706050403020100, 0x000e0d0c0b0a0908
|
|
||||||
|
|
||||||
|
|
||||||
mask:
|
|
||||||
dq 0xFFFFFFFFFFFFFFFF, 0x0000000000000000
|
|
||||||
mask2:
|
|
||||||
dq 0xFFFFFFFF00000000, 0xFFFFFFFFFFFFFFFF
|
|
||||||
mask3:
|
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
|
|||||||
@ -36,6 +36,10 @@
|
|||||||
;
|
;
|
||||||
%include "reg_sizes.asm"
|
%include "reg_sizes.asm"
|
||||||
|
|
||||||
|
%ifndef FUNCTION_NAME
|
||||||
|
%define FUNCTION_NAME crc64_iso_norm_by8
|
||||||
|
%endif
|
||||||
|
|
||||||
%define fetch_dist 1024
|
%define fetch_dist 1024
|
||||||
|
|
||||||
[bits 64]
|
[bits 64]
|
||||||
@ -61,8 +65,8 @@ section .text
|
|||||||
%define VARIABLE_OFFSET 16*2+8
|
%define VARIABLE_OFFSET 16*2+8
|
||||||
%endif
|
%endif
|
||||||
align 16
|
align 16
|
||||||
mk_global crc64_iso_norm_by8, function
|
mk_global FUNCTION_NAME, function
|
||||||
crc64_iso_norm_by8:
|
FUNCTION_NAME:
|
||||||
endbranch
|
endbranch
|
||||||
|
|
||||||
not arg1 ;~init_crc
|
not arg1 ;~init_crc
|
||||||
@ -504,6 +508,7 @@ section .data
|
|||||||
; precomputed constants
|
; precomputed constants
|
||||||
align 16
|
align 16
|
||||||
|
|
||||||
|
%ifndef USE_CONSTS
|
||||||
rk1:
|
rk1:
|
||||||
DQ 0x0000000000000145
|
DQ 0x0000000000000145
|
||||||
rk2:
|
rk2:
|
||||||
@ -544,6 +549,9 @@ rk19:
|
|||||||
DQ 0x0000000000011011
|
DQ 0x0000000000011011
|
||||||
rk20:
|
rk20:
|
||||||
DQ 0x00000000001ab1ab
|
DQ 0x00000000001ab1ab
|
||||||
|
%else
|
||||||
|
INCLUDE_CONSTS
|
||||||
|
%endif
|
||||||
|
|
||||||
mask1:
|
mask1:
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
dq 0x8080808080808080, 0x8080808080808080
|
||||||
|
|||||||
@ -37,6 +37,10 @@
|
|||||||
;
|
;
|
||||||
%include "reg_sizes.asm"
|
%include "reg_sizes.asm"
|
||||||
|
|
||||||
|
%ifndef FUNCTION_NAME
|
||||||
|
%define FUNCTION_NAME crc64_iso_refl_by8
|
||||||
|
%endif
|
||||||
|
|
||||||
%define fetch_dist 1024
|
%define fetch_dist 1024
|
||||||
|
|
||||||
[bits 64]
|
[bits 64]
|
||||||
@ -65,8 +69,8 @@ section .text
|
|||||||
|
|
||||||
|
|
||||||
align 16
|
align 16
|
||||||
mk_global crc64_iso_refl_by8, function
|
mk_global FUNCTION_NAME, function
|
||||||
crc64_iso_refl_by8:
|
FUNCTION_NAME:
|
||||||
endbranch
|
endbranch
|
||||||
; uint64_t c = crc ^ 0xffffffff,ffffffffL;
|
; uint64_t c = crc ^ 0xffffffff,ffffffffL;
|
||||||
not arg1
|
not arg1
|
||||||
@ -471,6 +475,7 @@ section .data
|
|||||||
align 16
|
align 16
|
||||||
; rk7 = floor(2^128/Q)
|
; rk7 = floor(2^128/Q)
|
||||||
; rk8 = Q
|
; rk8 = Q
|
||||||
|
%ifndef USE_CONSTS
|
||||||
rk1:
|
rk1:
|
||||||
DQ 0xf500000000000001
|
DQ 0xf500000000000001
|
||||||
rk2:
|
rk2:
|
||||||
@ -511,6 +516,9 @@ rk19:
|
|||||||
DQ 0xa011000000000001
|
DQ 0xa011000000000001
|
||||||
rk20:
|
rk20:
|
||||||
DQ 0x1b1ab00000000001
|
DQ 0x1b1ab00000000001
|
||||||
|
%else
|
||||||
|
INCLUDE_CONSTS
|
||||||
|
%endif
|
||||||
|
|
||||||
pshufb_shf_table:
|
pshufb_shf_table:
|
||||||
; use these values for shift constants for the pshufb instruction
|
; use these values for shift constants for the pshufb instruction
|
||||||
|
|||||||
@ -27,483 +27,9 @@
|
|||||||
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
; Function API:
|
%define FUNCTION_NAME crc64_jones_norm_by8
|
||||||
; uint64_t crc64_jones_norm_by8(
|
%define USE_CONSTS
|
||||||
; uint64_t init_crc, //initial CRC value, 64 bits
|
%macro INCLUDE_CONSTS 0
|
||||||
; const unsigned char *buf, //buffer pointer to calculate CRC on
|
|
||||||
; uint64_t len //buffer length in bytes (64-bit data)
|
|
||||||
; );
|
|
||||||
;
|
|
||||||
%include "reg_sizes.asm"
|
|
||||||
|
|
||||||
%define fetch_dist 1024
|
|
||||||
|
|
||||||
[bits 64]
|
|
||||||
default rel
|
|
||||||
|
|
||||||
section .text
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%xdefine arg1 rcx
|
|
||||||
%xdefine arg2 rdx
|
|
||||||
%xdefine arg3 r8
|
|
||||||
%else
|
|
||||||
%xdefine arg1 rdi
|
|
||||||
%xdefine arg2 rsi
|
|
||||||
%xdefine arg3 rdx
|
|
||||||
%endif
|
|
||||||
|
|
||||||
%define TMP 16*0
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%define XMM_SAVE 16*2
|
|
||||||
%define VARIABLE_OFFSET 16*10+8
|
|
||||||
%else
|
|
||||||
%define VARIABLE_OFFSET 16*2+8
|
|
||||||
%endif
|
|
||||||
align 16
|
|
||||||
mk_global crc64_jones_norm_by8, function
|
|
||||||
crc64_jones_norm_by8:
|
|
||||||
endbranch
|
|
||||||
|
|
||||||
not arg1 ;~init_crc
|
|
||||||
|
|
||||||
sub rsp,VARIABLE_OFFSET
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
; push the xmm registers into the stack to maintain
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*0], xmm6
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*1], xmm7
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*2], xmm8
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*3], xmm9
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*4], xmm10
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*5], xmm11
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*6], xmm12
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*7], xmm13
|
|
||||||
%endif
|
|
||||||
|
|
||||||
|
|
||||||
; check if smaller than 256
|
|
||||||
cmp arg3, 256
|
|
||||||
|
|
||||||
; for sizes less than 256, we can't fold 128B at a time...
|
|
||||||
jl _less_than_256
|
|
||||||
|
|
||||||
|
|
||||||
; load the initial crc value
|
|
||||||
movq xmm10, arg1 ; initial crc
|
|
||||||
|
|
||||||
; crc value does not need to be byte-reflected, but it needs to be moved to the high part of the register.
|
|
||||||
; because data will be byte-reflected and will align with initial crc at correct place.
|
|
||||||
pslldq xmm10, 8
|
|
||||||
|
|
||||||
movdqa xmm11, [SHUF_MASK]
|
|
||||||
; receive the initial 128B data, xor the initial crc value
|
|
||||||
movdqu xmm0, [arg2+16*0]
|
|
||||||
movdqu xmm1, [arg2+16*1]
|
|
||||||
movdqu xmm2, [arg2+16*2]
|
|
||||||
movdqu xmm3, [arg2+16*3]
|
|
||||||
movdqu xmm4, [arg2+16*4]
|
|
||||||
movdqu xmm5, [arg2+16*5]
|
|
||||||
movdqu xmm6, [arg2+16*6]
|
|
||||||
movdqu xmm7, [arg2+16*7]
|
|
||||||
|
|
||||||
pshufb xmm0, xmm11
|
|
||||||
; XOR the initial_crc value
|
|
||||||
pxor xmm0, xmm10
|
|
||||||
pshufb xmm1, xmm11
|
|
||||||
pshufb xmm2, xmm11
|
|
||||||
pshufb xmm3, xmm11
|
|
||||||
pshufb xmm4, xmm11
|
|
||||||
pshufb xmm5, xmm11
|
|
||||||
pshufb xmm6, xmm11
|
|
||||||
pshufb xmm7, xmm11
|
|
||||||
|
|
||||||
movdqa xmm10, [rk3] ;xmm10 has rk3 and rk4
|
|
||||||
;imm value of pclmulqdq instruction will determine which constant to use
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
; we subtract 256 instead of 128 to save one instruction from the loop
|
|
||||||
sub arg3, 256
|
|
||||||
|
|
||||||
; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The _fold_128_B_loop
|
|
||||||
; loop will fold 128B at a time until we have 128+y Bytes of buffer
|
|
||||||
|
|
||||||
|
|
||||||
; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
|
|
||||||
_fold_128_B_loop:
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 128 ; buf += 128;
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+0]
|
|
||||||
movdqu xmm9, [arg2+16*0]
|
|
||||||
movdqu xmm12, [arg2+16*1]
|
|
||||||
pshufb xmm9, xmm11
|
|
||||||
pshufb xmm12, xmm11
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
movdqa xmm13, xmm1
|
|
||||||
pclmulqdq xmm0, xmm10, 0x0
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x11
|
|
||||||
pclmulqdq xmm1, xmm10, 0x0
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x11
|
|
||||||
pxor xmm0, xmm9
|
|
||||||
xorps xmm0, xmm8
|
|
||||||
pxor xmm1, xmm12
|
|
||||||
xorps xmm1, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+32]
|
|
||||||
movdqu xmm9, [arg2+16*2]
|
|
||||||
movdqu xmm12, [arg2+16*3]
|
|
||||||
pshufb xmm9, xmm11
|
|
||||||
pshufb xmm12, xmm11
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
movdqa xmm13, xmm3
|
|
||||||
pclmulqdq xmm2, xmm10, 0x0
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x11
|
|
||||||
pclmulqdq xmm3, xmm10, 0x0
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x11
|
|
||||||
pxor xmm2, xmm9
|
|
||||||
xorps xmm2, xmm8
|
|
||||||
pxor xmm3, xmm12
|
|
||||||
xorps xmm3, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+64]
|
|
||||||
movdqu xmm9, [arg2+16*4]
|
|
||||||
movdqu xmm12, [arg2+16*5]
|
|
||||||
pshufb xmm9, xmm11
|
|
||||||
pshufb xmm12, xmm11
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
movdqa xmm13, xmm5
|
|
||||||
pclmulqdq xmm4, xmm10, 0x0
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x11
|
|
||||||
pclmulqdq xmm5, xmm10, 0x0
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x11
|
|
||||||
pxor xmm4, xmm9
|
|
||||||
xorps xmm4, xmm8
|
|
||||||
pxor xmm5, xmm12
|
|
||||||
xorps xmm5, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+96]
|
|
||||||
movdqu xmm9, [arg2+16*6]
|
|
||||||
movdqu xmm12, [arg2+16*7]
|
|
||||||
pshufb xmm9, xmm11
|
|
||||||
pshufb xmm12, xmm11
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
movdqa xmm13, xmm7
|
|
||||||
pclmulqdq xmm6, xmm10, 0x0
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x11
|
|
||||||
pclmulqdq xmm7, xmm10, 0x0
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x11
|
|
||||||
pxor xmm6, xmm9
|
|
||||||
xorps xmm6, xmm8
|
|
||||||
pxor xmm7, xmm12
|
|
||||||
xorps xmm7, xmm13
|
|
||||||
|
|
||||||
sub arg3, 128
|
|
||||||
|
|
||||||
; check if there is another 128B in the buffer to be able to fold
|
|
||||||
jge _fold_128_B_loop
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
add arg2, 128
|
|
||||||
; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
|
|
||||||
; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
|
|
||||||
|
|
||||||
|
|
||||||
; fold the 8 xmm registers to 1 xmm register with different constants
|
|
||||||
|
|
||||||
movdqa xmm10, [rk9]
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
pclmulqdq xmm0, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm0
|
|
||||||
|
|
||||||
movdqa xmm10, [rk11]
|
|
||||||
movdqa xmm8, xmm1
|
|
||||||
pclmulqdq xmm1, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm1
|
|
||||||
|
|
||||||
movdqa xmm10, [rk13]
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
pclmulqdq xmm2, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
movdqa xmm10, [rk15]
|
|
||||||
movdqa xmm8, xmm3
|
|
||||||
pclmulqdq xmm3, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm3
|
|
||||||
|
|
||||||
movdqa xmm10, [rk17]
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
pclmulqdq xmm4, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm4
|
|
||||||
|
|
||||||
movdqa xmm10, [rk19]
|
|
||||||
movdqa xmm8, xmm5
|
|
||||||
pclmulqdq xmm5, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm5
|
|
||||||
|
|
||||||
movdqa xmm10, [rk1] ;xmm10 has rk1 and rk2
|
|
||||||
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
pclmulqdq xmm6, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm6
|
|
||||||
|
|
||||||
|
|
||||||
; instead of 128, we add 112 to the loop counter to save 1 instruction from the loop
|
|
||||||
; instead of a cmp instruction, we use the negative flag with the jl instruction
|
|
||||||
add arg3, 128-16
|
|
||||||
jl _final_reduction_for_128
|
|
||||||
|
|
||||||
; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 and the rest is in memory
|
|
||||||
; we can fold 16 bytes at a time if y>=16
|
|
||||||
; continue folding 16B at a time
|
|
||||||
|
|
||||||
_16B_reduction_loop:
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
movdqu xmm0, [arg2]
|
|
||||||
pshufb xmm0, xmm11
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
; instead of a cmp instruction, we utilize the flags with the jge instruction
|
|
||||||
; equivalent of: cmp arg3, 16-16
|
|
||||||
; check if there is any more 16B in the buffer to be able to fold
|
|
||||||
jge _16B_reduction_loop
|
|
||||||
|
|
||||||
;now we have 16+z bytes left to reduce, where 0<= z < 16.
|
|
||||||
;first, we reduce the data in the xmm7 register
|
|
||||||
|
|
||||||
|
|
||||||
_final_reduction_for_128:
|
|
||||||
; check if any more data to fold. If not, compute the CRC of the final 128 bits
|
|
||||||
add arg3, 16
|
|
||||||
je _128_done
|
|
||||||
|
|
||||||
; here we are getting data that is less than 16 bytes.
|
|
||||||
; since we know that there was data before the pointer, we can offset the input pointer before the actual point, to receive exactly 16 bytes.
|
|
||||||
; after that the registers need to be adjusted.
|
|
||||||
_get_last_two_xmms:
|
|
||||||
movdqa xmm2, xmm7
|
|
||||||
|
|
||||||
movdqu xmm1, [arg2 - 16 + arg3]
|
|
||||||
pshufb xmm1, xmm11
|
|
||||||
|
|
||||||
; get rid of the extra data that was loaded before
|
|
||||||
; load the shift constant
|
|
||||||
lea rax, [pshufb_shf_table + 16]
|
|
||||||
sub rax, arg3
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
|
|
||||||
; shift xmm2 to the left by arg3 bytes
|
|
||||||
pshufb xmm2, xmm0
|
|
||||||
|
|
||||||
; shift xmm7 to the right by 16-arg3 bytes
|
|
||||||
pxor xmm0, [mask1]
|
|
||||||
pshufb xmm7, xmm0
|
|
||||||
pblendvb xmm1, xmm2 ;xmm0 is implicit
|
|
||||||
|
|
||||||
; fold 16 Bytes
|
|
||||||
movdqa xmm2, xmm1
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x11
|
|
||||||
pclmulqdq xmm8, xmm10, 0x0
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
_128_done:
|
|
||||||
; compute crc of a 128-bit value
|
|
||||||
movdqa xmm10, [rk5] ; rk5 and rk6 in xmm10
|
|
||||||
movdqa xmm0, xmm7
|
|
||||||
|
|
||||||
;64b fold
|
|
||||||
pclmulqdq xmm7, xmm10, 0x01 ; H*L
|
|
||||||
pslldq xmm0, 8
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
;barrett reduction
|
|
||||||
_barrett:
|
|
||||||
movdqa xmm10, [rk7] ; rk7 and rk8 in xmm10
|
|
||||||
movdqa xmm0, xmm7
|
|
||||||
|
|
||||||
movdqa xmm1, xmm7
|
|
||||||
pand xmm1, [mask3]
|
|
||||||
pclmulqdq xmm7, xmm10, 0x01
|
|
||||||
pxor xmm7, xmm1
|
|
||||||
|
|
||||||
pclmulqdq xmm7, xmm10, 0x11
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
pextrq rax, xmm7, 0
|
|
||||||
|
|
||||||
_cleanup:
|
|
||||||
not rax
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
movdqa xmm6, [rsp + XMM_SAVE + 16*0]
|
|
||||||
movdqa xmm7, [rsp + XMM_SAVE + 16*1]
|
|
||||||
movdqa xmm8, [rsp + XMM_SAVE + 16*2]
|
|
||||||
movdqa xmm9, [rsp + XMM_SAVE + 16*3]
|
|
||||||
movdqa xmm10, [rsp + XMM_SAVE + 16*4]
|
|
||||||
movdqa xmm11, [rsp + XMM_SAVE + 16*5]
|
|
||||||
movdqa xmm12, [rsp + XMM_SAVE + 16*6]
|
|
||||||
movdqa xmm13, [rsp + XMM_SAVE + 16*7]
|
|
||||||
%endif
|
|
||||||
add rsp, VARIABLE_OFFSET
|
|
||||||
ret
|
|
||||||
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_256:
|
|
||||||
|
|
||||||
; check if there is enough buffer to be able to fold 16B at a time
|
|
||||||
cmp arg3, 32
|
|
||||||
jl _less_than_32
|
|
||||||
movdqa xmm11, [SHUF_MASK]
|
|
||||||
|
|
||||||
; if there is, load the constants
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
pslldq xmm0, 8 ; align it to its correct place
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pshufb xmm7, xmm11 ; byte-reflect the plaintext
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 16
|
|
||||||
|
|
||||||
; update the counter. subtract 32 instead of 16 to save one instruction from the loop
|
|
||||||
sub arg3, 32
|
|
||||||
|
|
||||||
jmp _16B_reduction_loop
|
|
||||||
align 16
|
|
||||||
_less_than_32:
|
|
||||||
; mov initial crc to the return value. this is necessary for zero-length buffers.
|
|
||||||
mov rax, arg1
|
|
||||||
test arg3, arg3
|
|
||||||
je _cleanup
|
|
||||||
|
|
||||||
movdqa xmm11, [SHUF_MASK]
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
pslldq xmm0, 8 ; align it to its correct place
|
|
||||||
|
|
||||||
cmp arg3, 16
|
|
||||||
je _exact_16_left
|
|
||||||
jl _less_than_16_left
|
|
||||||
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pshufb xmm7, xmm11 ; byte-reflect the plaintext
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
jmp _get_last_two_xmms
|
|
||||||
align 16
|
|
||||||
_less_than_16_left:
|
|
||||||
; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
|
|
||||||
pxor xmm1, xmm1
|
|
||||||
mov r11, rsp
|
|
||||||
movdqa [r11], xmm1
|
|
||||||
|
|
||||||
; backup the counter value
|
|
||||||
mov r9, arg3
|
|
||||||
cmp arg3, 8
|
|
||||||
jl _less_than_8_left
|
|
||||||
|
|
||||||
; load 8 Bytes
|
|
||||||
mov rax, [arg2]
|
|
||||||
mov [r11], rax
|
|
||||||
add r11, 8
|
|
||||||
sub arg3, 8
|
|
||||||
add arg2, 8
|
|
||||||
_less_than_8_left:
|
|
||||||
|
|
||||||
cmp arg3, 4
|
|
||||||
jl _less_than_4_left
|
|
||||||
|
|
||||||
; load 4 Bytes
|
|
||||||
mov eax, [arg2]
|
|
||||||
mov [r11], eax
|
|
||||||
add r11, 4
|
|
||||||
sub arg3, 4
|
|
||||||
add arg2, 4
|
|
||||||
_less_than_4_left:
|
|
||||||
|
|
||||||
cmp arg3, 2
|
|
||||||
jl _less_than_2_left
|
|
||||||
|
|
||||||
; load 2 Bytes
|
|
||||||
mov ax, [arg2]
|
|
||||||
mov [r11], ax
|
|
||||||
add r11, 2
|
|
||||||
sub arg3, 2
|
|
||||||
add arg2, 2
|
|
||||||
_less_than_2_left:
|
|
||||||
cmp arg3, 1
|
|
||||||
jl _zero_left
|
|
||||||
|
|
||||||
; load 1 Byte
|
|
||||||
mov al, [arg2]
|
|
||||||
mov [r11], al
|
|
||||||
_zero_left:
|
|
||||||
movdqa xmm7, [rsp]
|
|
||||||
pshufb xmm7, xmm11
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
; shl r9, 4
|
|
||||||
lea rax, [pshufb_shf_table + 16]
|
|
||||||
sub rax, r9
|
|
||||||
|
|
||||||
cmp r9, 8
|
|
||||||
jl _end_1to7
|
|
||||||
|
|
||||||
_end_8to15:
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
pxor xmm0, [mask1]
|
|
||||||
|
|
||||||
pshufb xmm7, xmm0
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
_end_1to7:
|
|
||||||
; Right shift (8-length) bytes in XMM
|
|
||||||
add rax, 8
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
|
|
||||||
jmp _barrett
|
|
||||||
align 16
|
|
||||||
_exact_16_left:
|
|
||||||
movdqu xmm7, [arg2]
|
|
||||||
pshufb xmm7, xmm11
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
section .data
|
|
||||||
|
|
||||||
; precomputed constants
|
|
||||||
align 16
|
|
||||||
|
|
||||||
rk1:
|
rk1:
|
||||||
DQ 0x4445ed2750017038
|
DQ 0x4445ed2750017038
|
||||||
rk2:
|
rk2:
|
||||||
@ -544,36 +70,6 @@ rk19:
|
|||||||
DQ 0x96f2236e317179ee
|
DQ 0x96f2236e317179ee
|
||||||
rk20:
|
rk20:
|
||||||
DQ 0xf00839aa0dd64bac
|
DQ 0xf00839aa0dd64bac
|
||||||
|
%endm
|
||||||
|
|
||||||
mask1:
|
%include "crc64_iso_norm_by8.asm"
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
mask2:
|
|
||||||
dq 0xFFFFFFFFFFFFFFFF, 0x00000000FFFFFFFF
|
|
||||||
mask3:
|
|
||||||
dq 0x0000000000000000, 0xFFFFFFFFFFFFFFFF
|
|
||||||
|
|
||||||
SHUF_MASK:
|
|
||||||
dq 0x08090A0B0C0D0E0F, 0x0001020304050607
|
|
||||||
|
|
||||||
pshufb_shf_table:
|
|
||||||
; use these values for shift constants for the pshufb instruction
|
|
||||||
; different alignments result in values as shown:
|
|
||||||
; dq 0x8887868584838281, 0x008f8e8d8c8b8a89 ; shl 15 (16-1) / shr1
|
|
||||||
; dq 0x8988878685848382, 0x01008f8e8d8c8b8a ; shl 14 (16-3) / shr2
|
|
||||||
; dq 0x8a89888786858483, 0x0201008f8e8d8c8b ; shl 13 (16-4) / shr3
|
|
||||||
; dq 0x8b8a898887868584, 0x030201008f8e8d8c ; shl 12 (16-4) / shr4
|
|
||||||
; dq 0x8c8b8a8988878685, 0x04030201008f8e8d ; shl 11 (16-5) / shr5
|
|
||||||
; dq 0x8d8c8b8a89888786, 0x0504030201008f8e ; shl 10 (16-6) / shr6
|
|
||||||
; dq 0x8e8d8c8b8a898887, 0x060504030201008f ; shl 9 (16-7) / shr7
|
|
||||||
; dq 0x8f8e8d8c8b8a8988, 0x0706050403020100 ; shl 8 (16-8) / shr8
|
|
||||||
; dq 0x008f8e8d8c8b8a89, 0x0807060504030201 ; shl 7 (16-9) / shr9
|
|
||||||
; dq 0x01008f8e8d8c8b8a, 0x0908070605040302 ; shl 6 (16-10) / shr10
|
|
||||||
; dq 0x0201008f8e8d8c8b, 0x0a09080706050403 ; shl 5 (16-11) / shr11
|
|
||||||
; dq 0x030201008f8e8d8c, 0x0b0a090807060504 ; shl 4 (16-12) / shr12
|
|
||||||
; dq 0x04030201008f8e8d, 0x0c0b0a0908070605 ; shl 3 (16-13) / shr13
|
|
||||||
; dq 0x0504030201008f8e, 0x0d0c0b0a09080706 ; shl 2 (16-14) / shr14
|
|
||||||
; dq 0x060504030201008f, 0x0e0d0c0b0a090807 ; shl 1 (16-15) / shr15
|
|
||||||
dq 0x8786858483828100, 0x8f8e8d8c8b8a8988
|
|
||||||
dq 0x0706050403020100, 0x0f0e0d0c0b0a0908
|
|
||||||
dq 0x8080808080808080, 0x0f0e0d0c0b0a0908
|
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
|
|||||||
@ -27,450 +27,9 @@
|
|||||||
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||||
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
%define FUNCTION_NAME crc64_jones_refl_by8
|
||||||
; Function API:
|
%define USE_CONSTS
|
||||||
; uint64_t crc64_jones_refl_by8(
|
%macro INCLUDE_CONSTS 0
|
||||||
; uint64_t init_crc, //initial CRC value, 64 bits
|
|
||||||
; const unsigned char *buf, //buffer pointer to calculate CRC on
|
|
||||||
; uint64_t len //buffer length in bytes (64-bit data)
|
|
||||||
; );
|
|
||||||
;
|
|
||||||
%include "reg_sizes.asm"
|
|
||||||
|
|
||||||
%define fetch_dist 1024
|
|
||||||
|
|
||||||
[bits 64]
|
|
||||||
default rel
|
|
||||||
|
|
||||||
section .text
|
|
||||||
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%xdefine arg1 rcx
|
|
||||||
%xdefine arg2 rdx
|
|
||||||
%xdefine arg3 r8
|
|
||||||
%else
|
|
||||||
%xdefine arg1 rdi
|
|
||||||
%xdefine arg2 rsi
|
|
||||||
%xdefine arg3 rdx
|
|
||||||
%endif
|
|
||||||
|
|
||||||
%define TMP 16*0
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
%define XMM_SAVE 16*2
|
|
||||||
%define VARIABLE_OFFSET 16*10+8
|
|
||||||
%else
|
|
||||||
%define VARIABLE_OFFSET 16*2+8
|
|
||||||
%endif
|
|
||||||
|
|
||||||
|
|
||||||
align 16
|
|
||||||
mk_global crc64_jones_refl_by8, function
|
|
||||||
crc64_jones_refl_by8:
|
|
||||||
endbranch
|
|
||||||
; uint64_t c = crc ^ 0xffffffff,ffffffffL;
|
|
||||||
not arg1
|
|
||||||
sub rsp, VARIABLE_OFFSET
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
; push the xmm registers into the stack to maintain
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*0], xmm6
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*1], xmm7
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*2], xmm8
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*3], xmm9
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*4], xmm10
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*5], xmm11
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*6], xmm12
|
|
||||||
movdqa [rsp + XMM_SAVE + 16*7], xmm13
|
|
||||||
%endif
|
|
||||||
|
|
||||||
; check if smaller than 256B
|
|
||||||
cmp arg3, 256
|
|
||||||
|
|
||||||
; for sizes less than 256, we can't fold 128B at a time...
|
|
||||||
jl _less_than_256
|
|
||||||
|
|
||||||
|
|
||||||
; load the initial crc value
|
|
||||||
movq xmm10, arg1 ; initial crc
|
|
||||||
; receive the initial 128B data, xor the initial crc value
|
|
||||||
movdqu xmm0, [arg2+16*0]
|
|
||||||
movdqu xmm1, [arg2+16*1]
|
|
||||||
movdqu xmm2, [arg2+16*2]
|
|
||||||
movdqu xmm3, [arg2+16*3]
|
|
||||||
movdqu xmm4, [arg2+16*4]
|
|
||||||
movdqu xmm5, [arg2+16*5]
|
|
||||||
movdqu xmm6, [arg2+16*6]
|
|
||||||
movdqu xmm7, [arg2+16*7]
|
|
||||||
|
|
||||||
; XOR the initial_crc value
|
|
||||||
pxor xmm0, xmm10
|
|
||||||
movdqa xmm10, [rk3] ;xmm10 has rk3 and rk4
|
|
||||||
;imm value of pclmulqdq instruction will determine which constant to use
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
; we subtract 256 instead of 128 to save one instruction from the loop
|
|
||||||
sub arg3, 256
|
|
||||||
|
|
||||||
; at this section of the code, there is 128*x+y (0<=y<128) bytes of buffer. The _fold_128_B_loop
|
|
||||||
; loop will fold 128B at a time until we have 128+y Bytes of buffer
|
|
||||||
|
|
||||||
|
|
||||||
; fold 128B at a time. This section of the code folds 8 xmm registers in parallel
|
|
||||||
_fold_128_B_loop:
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 128
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+0]
|
|
||||||
movdqu xmm9, [arg2+16*0]
|
|
||||||
movdqu xmm12, [arg2+16*1]
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
movdqa xmm13, xmm1
|
|
||||||
pclmulqdq xmm0, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm1, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm0, xmm9
|
|
||||||
xorps xmm0, xmm8
|
|
||||||
pxor xmm1, xmm12
|
|
||||||
xorps xmm1, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+32]
|
|
||||||
movdqu xmm9, [arg2+16*2]
|
|
||||||
movdqu xmm12, [arg2+16*3]
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
movdqa xmm13, xmm3
|
|
||||||
pclmulqdq xmm2, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm3, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm2, xmm9
|
|
||||||
xorps xmm2, xmm8
|
|
||||||
pxor xmm3, xmm12
|
|
||||||
xorps xmm3, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+64]
|
|
||||||
movdqu xmm9, [arg2+16*4]
|
|
||||||
movdqu xmm12, [arg2+16*5]
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
movdqa xmm13, xmm5
|
|
||||||
pclmulqdq xmm4, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm5, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm4, xmm9
|
|
||||||
xorps xmm4, xmm8
|
|
||||||
pxor xmm5, xmm12
|
|
||||||
xorps xmm5, xmm13
|
|
||||||
|
|
||||||
prefetchnta [arg2+fetch_dist+96]
|
|
||||||
movdqu xmm9, [arg2+16*6]
|
|
||||||
movdqu xmm12, [arg2+16*7]
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
movdqa xmm13, xmm7
|
|
||||||
pclmulqdq xmm6, xmm10, 0x10
|
|
||||||
pclmulqdq xmm8, xmm10 , 0x1
|
|
||||||
pclmulqdq xmm7, xmm10, 0x10
|
|
||||||
pclmulqdq xmm13, xmm10 , 0x1
|
|
||||||
pxor xmm6, xmm9
|
|
||||||
xorps xmm6, xmm8
|
|
||||||
pxor xmm7, xmm12
|
|
||||||
xorps xmm7, xmm13
|
|
||||||
|
|
||||||
sub arg3, 128
|
|
||||||
|
|
||||||
; check if there is another 128B in the buffer to be able to fold
|
|
||||||
jge _fold_128_B_loop
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
add arg2, 128
|
|
||||||
; at this point, the buffer pointer is pointing at the last y Bytes of the buffer, where 0 <= y < 128
|
|
||||||
; the 128B of folded data is in 8 of the xmm registers: xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7
|
|
||||||
|
|
||||||
|
|
||||||
; fold the 8 xmm registers to 1 xmm register with different constants
|
|
||||||
; xmm0 to xmm7
|
|
||||||
movdqa xmm10, [rk9]
|
|
||||||
movdqa xmm8, xmm0
|
|
||||||
pclmulqdq xmm0, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm0
|
|
||||||
;xmm1 to xmm7
|
|
||||||
movdqa xmm10, [rk11]
|
|
||||||
movdqa xmm8, xmm1
|
|
||||||
pclmulqdq xmm1, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm1
|
|
||||||
|
|
||||||
movdqa xmm10, [rk13]
|
|
||||||
movdqa xmm8, xmm2
|
|
||||||
pclmulqdq xmm2, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
movdqa xmm10, [rk15]
|
|
||||||
movdqa xmm8, xmm3
|
|
||||||
pclmulqdq xmm3, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm3
|
|
||||||
|
|
||||||
movdqa xmm10, [rk17]
|
|
||||||
movdqa xmm8, xmm4
|
|
||||||
pclmulqdq xmm4, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm4
|
|
||||||
|
|
||||||
movdqa xmm10, [rk19]
|
|
||||||
movdqa xmm8, xmm5
|
|
||||||
pclmulqdq xmm5, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
xorps xmm7, xmm5
|
|
||||||
; xmm6 to xmm7
|
|
||||||
movdqa xmm10, [rk1]
|
|
||||||
movdqa xmm8, xmm6
|
|
||||||
pclmulqdq xmm6, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm6
|
|
||||||
|
|
||||||
|
|
||||||
; instead of 128, we add 128-16 to the loop counter to save 1 instruction from the loop
|
|
||||||
; instead of a cmp instruction, we use the negative flag with the jl instruction
|
|
||||||
add arg3, 128-16
|
|
||||||
jl _final_reduction_for_128
|
|
||||||
|
|
||||||
; now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 and the rest is in memory
|
|
||||||
; we can fold 16 bytes at a time if y>=16
|
|
||||||
; continue folding 16B at a time
|
|
||||||
|
|
||||||
_16B_reduction_loop:
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x1
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
movdqu xmm0, [arg2]
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
; instead of a cmp instruction, we utilize the flags with the jge instruction
|
|
||||||
; equivalent of: cmp arg3, 16-16
|
|
||||||
; check if there is any more 16B in the buffer to be able to fold
|
|
||||||
jge _16B_reduction_loop
|
|
||||||
|
|
||||||
;now we have 16+z bytes left to reduce, where 0<= z < 16.
|
|
||||||
;first, we reduce the data in the xmm7 register
|
|
||||||
|
|
||||||
|
|
||||||
_final_reduction_for_128:
|
|
||||||
add arg3, 16
|
|
||||||
je _128_done
|
|
||||||
; here we are getting data that is less than 16 bytes.
|
|
||||||
; since we know that there was data before the pointer, we can offset the input pointer before the actual point, to receive exactly 16 bytes.
|
|
||||||
; after that the registers need to be adjusted.
|
|
||||||
_get_last_two_xmms:
|
|
||||||
|
|
||||||
|
|
||||||
movdqa xmm2, xmm7
|
|
||||||
movdqu xmm1, [arg2 - 16 + arg3]
|
|
||||||
|
|
||||||
; get rid of the extra data that was loaded before
|
|
||||||
; load the shift constant
|
|
||||||
lea rax, [pshufb_shf_table]
|
|
||||||
add rax, arg3
|
|
||||||
movdqu xmm0, [rax]
|
|
||||||
|
|
||||||
|
|
||||||
pshufb xmm7, xmm0
|
|
||||||
pxor xmm0, [mask3]
|
|
||||||
pshufb xmm2, xmm0
|
|
||||||
|
|
||||||
pblendvb xmm2, xmm1 ;xmm0 is implicit
|
|
||||||
;;;;;;;;;;
|
|
||||||
movdqa xmm8, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x1
|
|
||||||
|
|
||||||
pclmulqdq xmm8, xmm10, 0x10
|
|
||||||
pxor xmm7, xmm8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
|
|
||||||
_128_done:
|
|
||||||
; compute crc of a 128-bit value
|
|
||||||
movdqa xmm10, [rk5]
|
|
||||||
movdqa xmm0, xmm7
|
|
||||||
|
|
||||||
;64b fold
|
|
||||||
pclmulqdq xmm7, xmm10, 0
|
|
||||||
psrldq xmm0, 8
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
;barrett reduction
|
|
||||||
_barrett:
|
|
||||||
movdqa xmm1, xmm7
|
|
||||||
movdqa xmm10, [rk7]
|
|
||||||
|
|
||||||
pclmulqdq xmm7, xmm10, 0
|
|
||||||
movdqa xmm2, xmm7
|
|
||||||
pclmulqdq xmm7, xmm10, 0x10
|
|
||||||
pslldq xmm2, 8
|
|
||||||
pxor xmm7, xmm2
|
|
||||||
pxor xmm7, xmm1
|
|
||||||
pextrq rax, xmm7, 1
|
|
||||||
|
|
||||||
_cleanup:
|
|
||||||
; return c ^ 0xffffffff, ffffffffL;
|
|
||||||
not rax
|
|
||||||
|
|
||||||
|
|
||||||
%ifidn __OUTPUT_FORMAT__, win64
|
|
||||||
movdqa xmm6, [rsp + XMM_SAVE + 16*0]
|
|
||||||
movdqa xmm7, [rsp + XMM_SAVE + 16*1]
|
|
||||||
movdqa xmm8, [rsp + XMM_SAVE + 16*2]
|
|
||||||
movdqa xmm9, [rsp + XMM_SAVE + 16*3]
|
|
||||||
movdqa xmm10, [rsp + XMM_SAVE + 16*4]
|
|
||||||
movdqa xmm11, [rsp + XMM_SAVE + 16*5]
|
|
||||||
movdqa xmm12, [rsp + XMM_SAVE + 16*6]
|
|
||||||
movdqa xmm13, [rsp + XMM_SAVE + 16*7]
|
|
||||||
%endif
|
|
||||||
add rsp, VARIABLE_OFFSET
|
|
||||||
ret
|
|
||||||
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_256:
|
|
||||||
|
|
||||||
; check if there is enough buffer to be able to fold 16B at a time
|
|
||||||
cmp arg3, 32
|
|
||||||
jl _less_than_32
|
|
||||||
|
|
||||||
; if there is, load the constants
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pxor xmm7, xmm0
|
|
||||||
|
|
||||||
; update the buffer pointer
|
|
||||||
add arg2, 16
|
|
||||||
|
|
||||||
; update the counter. subtract 32 instead of 16 to save one instruction from the loop
|
|
||||||
sub arg3, 32
|
|
||||||
|
|
||||||
jmp _16B_reduction_loop
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_32:
|
|
||||||
; mov initial crc to the return value. this is necessary for zero-length buffers.
|
|
||||||
mov rax, arg1
|
|
||||||
test arg3, arg3
|
|
||||||
je _cleanup
|
|
||||||
|
|
||||||
movq xmm0, arg1 ; get the initial crc value
|
|
||||||
|
|
||||||
cmp arg3, 16
|
|
||||||
je _exact_16_left
|
|
||||||
jl _less_than_16_left
|
|
||||||
|
|
||||||
movdqu xmm7, [arg2] ; load the plaintext
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
add arg2, 16
|
|
||||||
sub arg3, 16
|
|
||||||
movdqa xmm10, [rk1] ; rk1 and rk2 in xmm10
|
|
||||||
jmp _get_last_two_xmms
|
|
||||||
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_less_than_16_left:
|
|
||||||
; use stack space to load data less than 16 bytes, zero-out the 16B in memory first.
|
|
||||||
|
|
||||||
pxor xmm1, xmm1
|
|
||||||
mov r11, rsp
|
|
||||||
movdqa [r11], xmm1
|
|
||||||
|
|
||||||
; backup the counter value
|
|
||||||
mov r9, arg3
|
|
||||||
cmp arg3, 8
|
|
||||||
jl _less_than_8_left
|
|
||||||
|
|
||||||
; load 8 Bytes
|
|
||||||
mov rax, [arg2]
|
|
||||||
mov [r11], rax
|
|
||||||
add r11, 8
|
|
||||||
sub arg3, 8
|
|
||||||
add arg2, 8
|
|
||||||
_less_than_8_left:
|
|
||||||
|
|
||||||
cmp arg3, 4
|
|
||||||
jl _less_than_4_left
|
|
||||||
|
|
||||||
; load 4 Bytes
|
|
||||||
mov eax, [arg2]
|
|
||||||
mov [r11], eax
|
|
||||||
add r11, 4
|
|
||||||
sub arg3, 4
|
|
||||||
add arg2, 4
|
|
||||||
_less_than_4_left:
|
|
||||||
|
|
||||||
cmp arg3, 2
|
|
||||||
jl _less_than_2_left
|
|
||||||
|
|
||||||
; load 2 Bytes
|
|
||||||
mov ax, [arg2]
|
|
||||||
mov [r11], ax
|
|
||||||
add r11, 2
|
|
||||||
sub arg3, 2
|
|
||||||
add arg2, 2
|
|
||||||
_less_than_2_left:
|
|
||||||
cmp arg3, 1
|
|
||||||
jl _zero_left
|
|
||||||
|
|
||||||
; load 1 Byte
|
|
||||||
mov al, [arg2]
|
|
||||||
mov [r11], al
|
|
||||||
|
|
||||||
_zero_left:
|
|
||||||
movdqa xmm7, [rsp]
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
lea rax,[pshufb_shf_table]
|
|
||||||
|
|
||||||
cmp r9, 8
|
|
||||||
jl _end_1to7
|
|
||||||
|
|
||||||
_end_8to15:
|
|
||||||
movdqu xmm0, [rax + r9]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
_end_1to7:
|
|
||||||
; Left shift (8-length) bytes in XMM
|
|
||||||
movdqu xmm0, [rax + r9 + 8]
|
|
||||||
pshufb xmm7,xmm0
|
|
||||||
|
|
||||||
jmp _barrett
|
|
||||||
|
|
||||||
align 16
|
|
||||||
_exact_16_left:
|
|
||||||
movdqu xmm7, [arg2]
|
|
||||||
pxor xmm7, xmm0 ; xor the initial crc value
|
|
||||||
|
|
||||||
jmp _128_done
|
|
||||||
|
|
||||||
section .data
|
|
||||||
|
|
||||||
; precomputed constants
|
|
||||||
align 16
|
|
||||||
; rk7 = floor(2^128/Q)
|
|
||||||
; rk8 = Q
|
|
||||||
rk1:
|
rk1:
|
||||||
DQ 0x381d0015c96f4444
|
DQ 0x381d0015c96f4444
|
||||||
rk2:
|
rk2:
|
||||||
@ -511,32 +70,6 @@ rk19:
|
|||||||
DQ 0xef3d1d18ed889ed2
|
DQ 0xef3d1d18ed889ed2
|
||||||
rk20:
|
rk20:
|
||||||
DQ 0x6ba4d760ab38201e
|
DQ 0x6ba4d760ab38201e
|
||||||
|
%endm
|
||||||
|
|
||||||
pshufb_shf_table:
|
%include "crc64_iso_refl_by8.asm"
|
||||||
; use these values for shift constants for the pshufb instruction
|
|
||||||
; different alignments result in values as shown:
|
|
||||||
; dq 0x8887868584838281, 0x008f8e8d8c8b8a89 ; shl 15 (16-1) / shr1
|
|
||||||
; dq 0x8988878685848382, 0x01008f8e8d8c8b8a ; shl 14 (16-3) / shr2
|
|
||||||
; dq 0x8a89888786858483, 0x0201008f8e8d8c8b ; shl 13 (16-4) / shr3
|
|
||||||
; dq 0x8b8a898887868584, 0x030201008f8e8d8c ; shl 12 (16-4) / shr4
|
|
||||||
; dq 0x8c8b8a8988878685, 0x04030201008f8e8d ; shl 11 (16-5) / shr5
|
|
||||||
; dq 0x8d8c8b8a89888786, 0x0504030201008f8e ; shl 10 (16-6) / shr6
|
|
||||||
; dq 0x8e8d8c8b8a898887, 0x060504030201008f ; shl 9 (16-7) / shr7
|
|
||||||
; dq 0x8f8e8d8c8b8a8988, 0x0706050403020100 ; shl 8 (16-8) / shr8
|
|
||||||
; dq 0x008f8e8d8c8b8a89, 0x0807060504030201 ; shl 7 (16-9) / shr9
|
|
||||||
; dq 0x01008f8e8d8c8b8a, 0x0908070605040302 ; shl 6 (16-10) / shr10
|
|
||||||
; dq 0x0201008f8e8d8c8b, 0x0a09080706050403 ; shl 5 (16-11) / shr11
|
|
||||||
; dq 0x030201008f8e8d8c, 0x0b0a090807060504 ; shl 4 (16-12) / shr12
|
|
||||||
; dq 0x04030201008f8e8d, 0x0c0b0a0908070605 ; shl 3 (16-13) / shr13
|
|
||||||
; dq 0x0504030201008f8e, 0x0d0c0b0a09080706 ; shl 2 (16-14) / shr14
|
|
||||||
; dq 0x060504030201008f, 0x0e0d0c0b0a090807 ; shl 1 (16-15) / shr15
|
|
||||||
dq 0x8786858483828100, 0x8f8e8d8c8b8a8988
|
|
||||||
dq 0x0706050403020100, 0x000e0d0c0b0a0908
|
|
||||||
|
|
||||||
|
|
||||||
mask:
|
|
||||||
dq 0xFFFFFFFFFFFFFFFF, 0x0000000000000000
|
|
||||||
mask2:
|
|
||||||
dq 0xFFFFFFFF00000000, 0xFFFFFFFFFFFFFFFF
|
|
||||||
mask3:
|
|
||||||
dq 0x8080808080808080, 0x8080808080808080
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user