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bionic/libc/arch-x86_64/string/sse2-memmove-slm.S
Varvara Rainchik fce861498c Fix for slm-tuned memmove (both 32- and 64-bit). 
Introduce a test for memmove that catches a fault.
Fix both 32- and 64-bit versions of slm-tuned memmove.

Change-Id: Ib416def2610a0972e32c3b9b6055b54967643dc3
Signed-off-by: Varvara Rainchik <varvara.rainchik@intel.com>
2014-06-05 11:08:09 -07:00

514 lines
12 KiB
ArmAsm
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/*
Copyright (c) 2014, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "cache.h"
#ifndef MEMMOVE
# define MEMMOVE memmove
#endif
#ifndef L
# define L(label) .L##label
#endif
#ifndef cfi_startproc
# define cfi_startproc .cfi_startproc
#endif
#ifndef cfi_endproc
# define cfi_endproc .cfi_endproc
#endif
#ifndef cfi_rel_offset
# define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off
#endif
#ifndef cfi_restore
# define cfi_restore(reg) .cfi_restore reg
#endif
#ifndef cfi_adjust_cfa_offset
# define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off
#endif
#ifndef ENTRY
# define ENTRY(name) \
.type name, @function; \
.globl name; \
.p2align 4; \
name: \
cfi_startproc
#endif
#ifndef END
# define END(name) \
cfi_endproc; \
.size name, .-name
#endif
#define CFI_PUSH(REG) \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (REG, 0)
#define CFI_POP(REG) \
cfi_adjust_cfa_offset (-4); \
cfi_restore (REG)
#define PUSH(REG) push REG;
#define POP(REG) pop REG;
#define ENTRANCE PUSH (%rbx);
#define RETURN_END POP (%rbx); ret
#define RETURN RETURN_END;
.section .text.sse2,"ax",@progbits
ENTRY (MEMMOVE)
ENTRANCE
#ifdef USE_AS_BCOPY
xchg %rsi, %rdi
#endif
mov %rdi, %rax
/* Check whether we should copy backward or forward. */
cmp %rsi, %rdi
je L(mm_return)
jg L(mm_len_0_or_more_backward)
/* Now do checks for lengths. We do [0..16], [0..32], [0..64], [0..128]
separately. */
cmp $16, %rdx
jbe L(mm_len_0_16_bytes_forward)
cmp $32, %rdx
ja L(mm_len_32_or_more_forward)
/* Copy [0..32] and return. */
movdqu (%rsi), %xmm0
movdqu -16(%rsi, %rdx), %xmm1
movdqu %xmm0, (%rdi)
movdqu %xmm1, -16(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_32_or_more_forward):
cmp $64, %rdx
ja L(mm_len_64_or_more_forward)
/* Copy [0..64] and return. */
movdqu (%rsi), %xmm0
movdqu 16(%rsi), %xmm1
movdqu -16(%rsi, %rdx), %xmm2
movdqu -32(%rsi, %rdx), %xmm3
movdqu %xmm0, (%rdi)
movdqu %xmm1, 16(%rdi)
movdqu %xmm2, -16(%rdi, %rdx)
movdqu %xmm3, -32(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_64_or_more_forward):
cmp $128, %rdx
ja L(mm_len_128_or_more_forward)
/* Copy [0..128] and return. */
movdqu (%rsi), %xmm0
movdqu 16(%rsi), %xmm1
movdqu 32(%rsi), %xmm2
movdqu 48(%rsi), %xmm3
movdqu -64(%rsi, %rdx), %xmm4
movdqu -48(%rsi, %rdx), %xmm5
movdqu -32(%rsi, %rdx), %xmm6
movdqu -16(%rsi, %rdx), %xmm7
movdqu %xmm0, (%rdi)
movdqu %xmm1, 16(%rdi)
movdqu %xmm2, 32(%rdi)
movdqu %xmm3, 48(%rdi)
movdqu %xmm4, -64(%rdi, %rdx)
movdqu %xmm5, -48(%rdi, %rdx)
movdqu %xmm6, -32(%rdi, %rdx)
movdqu %xmm7, -16(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_128_or_more_forward):
/* Aligning the address of destination. */
/* save first unaligned 64 bytes */
movdqu (%rsi), %xmm0
movdqu 16(%rsi), %xmm1
movdqu 32(%rsi), %xmm2
movdqu 48(%rsi), %xmm3
lea 64(%rdi), %r8
and $-64, %r8 /* r8 now aligned to next 64 byte boundary */
sub %rdi, %rsi /* rsi = src - dst = diff */
movdqu (%r8, %rsi), %xmm4
movdqu 16(%r8, %rsi), %xmm5
movdqu 32(%r8, %rsi), %xmm6
movdqu 48(%r8, %rsi), %xmm7
movdqu %xmm0, (%rdi)
movdqu %xmm1, 16(%rdi)
movdqu %xmm2, 32(%rdi)
movdqu %xmm3, 48(%rdi)
movdqa %xmm4, (%r8)
movaps %xmm5, 16(%r8)
movaps %xmm6, 32(%r8)
movaps %xmm7, 48(%r8)
add $64, %r8
lea (%rdi, %rdx), %rbx
and $-64, %rbx
cmp %r8, %rbx
jbe L(mm_copy_remaining_forward)
cmp $SHARED_CACHE_SIZE_HALF, %rdx
jae L(mm_large_page_loop_forward)
.p2align 4
L(mm_main_loop_forward):
prefetcht0 128(%r8, %rsi)
movdqu (%r8, %rsi), %xmm0
movdqu 16(%r8, %rsi), %xmm1
movdqu 32(%r8, %rsi), %xmm2
movdqu 48(%r8, %rsi), %xmm3
movdqa %xmm0, (%r8)
movaps %xmm1, 16(%r8)
movaps %xmm2, 32(%r8)
movaps %xmm3, 48(%r8)
lea 64(%r8), %r8
cmp %r8, %rbx
ja L(mm_main_loop_forward)
L(mm_copy_remaining_forward):
add %rdi, %rdx
sub %r8, %rdx
/* We copied all up till %rdi position in the dst.
In %rdx now is how many bytes are left to copy.
Now we need to advance %r8. */
lea (%r8, %rsi), %r9
L(mm_remaining_0_64_bytes_forward):
cmp $32, %rdx
ja L(mm_remaining_33_64_bytes_forward)
cmp $16, %rdx
ja L(mm_remaining_17_32_bytes_forward)
test %rdx, %rdx
.p2align 4,,2
je L(mm_return)
cmpb $8, %dl
ja L(mm_remaining_9_16_bytes_forward)
cmpb $4, %dl
.p2align 4,,5
ja L(mm_remaining_5_8_bytes_forward)
cmpb $2, %dl
.p2align 4,,1
ja L(mm_remaining_3_4_bytes_forward)
movzbl -1(%r9,%rdx), %esi
movzbl (%r9), %ebx
movb %sil, -1(%r8,%rdx)
movb %bl, (%r8)
jmp L(mm_return)
L(mm_remaining_33_64_bytes_forward):
movdqu (%r9), %xmm0
movdqu 16(%r9), %xmm1
movdqu -32(%r9, %rdx), %xmm2
movdqu -16(%r9, %rdx), %xmm3
movdqu %xmm0, (%r8)
movdqu %xmm1, 16(%r8)
movdqu %xmm2, -32(%r8, %rdx)
movdqu %xmm3, -16(%r8, %rdx)
jmp L(mm_return)
L(mm_remaining_17_32_bytes_forward):
movdqu (%r9), %xmm0
movdqu -16(%r9, %rdx), %xmm1
movdqu %xmm0, (%r8)
movdqu %xmm1, -16(%r8, %rdx)
jmp L(mm_return)
L(mm_remaining_5_8_bytes_forward):
movl (%r9), %esi
movl -4(%r9,%rdx), %ebx
movl %esi, (%r8)
movl %ebx, -4(%r8,%rdx)
jmp L(mm_return)
L(mm_remaining_9_16_bytes_forward):
mov (%r9), %rsi
mov -8(%r9, %rdx), %rbx
mov %rsi, (%r8)
mov %rbx, -8(%r8, %rdx)
jmp L(mm_return)
L(mm_remaining_3_4_bytes_forward):
movzwl -2(%r9,%rdx), %esi
movzwl (%r9), %ebx
movw %si, -2(%r8,%rdx)
movw %bx, (%r8)
jmp L(mm_return)
L(mm_len_0_16_bytes_forward):
testb $24, %dl
jne L(mm_len_9_16_bytes_forward)
testb $4, %dl
.p2align 4,,5
jne L(mm_len_5_8_bytes_forward)
test %rdx, %rdx
.p2align 4,,2
je L(mm_return)
testb $2, %dl
.p2align 4,,1
jne L(mm_len_2_4_bytes_forward)
movzbl -1(%rsi,%rdx), %ebx
movzbl (%rsi), %esi
movb %bl, -1(%rdi,%rdx)
movb %sil, (%rdi)
jmp L(mm_return)
L(mm_len_2_4_bytes_forward):
movzwl -2(%rsi,%rdx), %ebx
movzwl (%rsi), %esi
movw %bx, -2(%rdi,%rdx)
movw %si, (%rdi)
jmp L(mm_return)
L(mm_len_5_8_bytes_forward):
movl (%rsi), %ebx
movl -4(%rsi,%rdx), %esi
movl %ebx, (%rdi)
movl %esi, -4(%rdi,%rdx)
jmp L(mm_return)
L(mm_len_9_16_bytes_forward):
mov (%rsi), %rbx
mov -8(%rsi, %rdx), %rsi
mov %rbx, (%rdi)
mov %rsi, -8(%rdi, %rdx)
jmp L(mm_return)
L(mm_recalc_len):
/* Compute in %rdx how many bytes are left to copy after
the main loop stops. */
mov %rbx, %rdx
sub %rdi, %rdx
/* The code for copying backwards. */
L(mm_len_0_or_more_backward):
/* Now do checks for lengths. We do [0..16], [16..32], [32..64], [64..128]
separately. */
cmp $16, %rdx
jbe L(mm_len_0_16_bytes_backward)
cmp $32, %rdx
ja L(mm_len_32_or_more_backward)
/* Copy [0..32] and return. */
movdqu (%rsi), %xmm0
movdqu -16(%rsi, %rdx), %xmm1
movdqu %xmm0, (%rdi)
movdqu %xmm1, -16(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_32_or_more_backward):
cmp $64, %rdx
ja L(mm_len_64_or_more_backward)
/* Copy [0..64] and return. */
movdqu (%rsi), %xmm0
movdqu 16(%rsi), %xmm1
movdqu -16(%rsi, %rdx), %xmm2
movdqu -32(%rsi, %rdx), %xmm3
movdqu %xmm0, (%rdi)
movdqu %xmm1, 16(%rdi)
movdqu %xmm2, -16(%rdi, %rdx)
movdqu %xmm3, -32(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_64_or_more_backward):
cmp $128, %rdx
ja L(mm_len_128_or_more_backward)
/* Copy [0..128] and return. */
movdqu (%rsi), %xmm0
movdqu 16(%rsi), %xmm1
movdqu 32(%rsi), %xmm2
movdqu 48(%rsi), %xmm3
movdqu -64(%rsi, %rdx), %xmm4
movdqu -48(%rsi, %rdx), %xmm5
movdqu -32(%rsi, %rdx), %xmm6
movdqu -16(%rsi, %rdx), %xmm7
movdqu %xmm0, (%rdi)
movdqu %xmm1, 16(%rdi)
movdqu %xmm2, 32(%rdi)
movdqu %xmm3, 48(%rdi)
movdqu %xmm4, -64(%rdi, %rdx)
movdqu %xmm5, -48(%rdi, %rdx)
movdqu %xmm6, -32(%rdi, %rdx)
movdqu %xmm7, -16(%rdi, %rdx)
jmp L(mm_return)
L(mm_len_128_or_more_backward):
/* Aligning the address of destination. We need to save
16 bits from the source in order not to overwrite them. */
movdqu -16(%rsi, %rdx), %xmm0
movdqu -32(%rsi, %rdx), %xmm1
movdqu -48(%rsi, %rdx), %xmm2
movdqu -64(%rsi, %rdx), %xmm3
lea (%rdi, %rdx), %r9
and $-64, %r9 /* r9 = aligned dst */
mov %rsi, %r8
sub %rdi, %r8 /* r8 = src - dst, diff */
movdqu -16(%r9, %r8), %xmm4
movdqu -32(%r9, %r8), %xmm5
movdqu -48(%r9, %r8), %xmm6
movdqu -64(%r9, %r8), %xmm7
movdqu %xmm0, -16(%rdi, %rdx)
movdqu %xmm1, -32(%rdi, %rdx)
movdqu %xmm2, -48(%rdi, %rdx)
movdqu %xmm3, -64(%rdi, %rdx)
movdqa %xmm4, -16(%r9)
movaps %xmm5, -32(%r9)
movaps %xmm6, -48(%r9)
movaps %xmm7, -64(%r9)
lea -64(%r9), %r9
lea 64(%rdi), %rbx
and $-64, %rbx
cmp %r9, %rbx
jae L(mm_recalc_len)
cmp $SHARED_CACHE_SIZE_HALF, %rdx
jae L(mm_large_page_loop_backward)
.p2align 4
L(mm_main_loop_backward):
prefetcht0 -128(%r9, %r8)
movdqu -64(%r9, %r8), %xmm0
movdqu -48(%r9, %r8), %xmm1
movdqu -32(%r9, %r8), %xmm2
movdqu -16(%r9, %r8), %xmm3
movdqa %xmm0, -64(%r9)
movaps %xmm1, -48(%r9)
movaps %xmm2, -32(%r9)
movaps %xmm3, -16(%r9)
lea -64(%r9), %r9
cmp %r9, %rbx
jb L(mm_main_loop_backward)
jmp L(mm_recalc_len)
/* Copy [0..16] and return. */
L(mm_len_0_16_bytes_backward):
testb $24, %dl
jnz L(mm_len_9_16_bytes_backward)
testb $4, %dl
.p2align 4,,5
jnz L(mm_len_5_8_bytes_backward)
test %rdx, %rdx
.p2align 4,,2
je L(mm_return)
testb $2, %dl
.p2align 4,,1
jne L(mm_len_3_4_bytes_backward)
movzbl -1(%rsi,%rdx), %ebx
movzbl (%rsi), %ecx
movb %bl, -1(%rdi,%rdx)
movb %cl, (%rdi)
jmp L(mm_return)
L(mm_len_3_4_bytes_backward):
movzwl -2(%rsi,%rdx), %ebx
movzwl (%rsi), %ecx
movw %bx, -2(%rdi,%rdx)
movw %cx, (%rdi)
jmp L(mm_return)
L(mm_len_9_16_bytes_backward):
movl -4(%rsi,%rdx), %ebx
movl -8(%rsi,%rdx), %ecx
movl %ebx, -4(%rdi,%rdx)
movl %ecx, -8(%rdi,%rdx)
sub $8, %rdx
jmp L(mm_len_0_16_bytes_backward)
L(mm_len_5_8_bytes_backward):
movl (%rsi), %ebx
movl -4(%rsi,%rdx), %ecx
movl %ebx, (%rdi)
movl %ecx, -4(%rdi,%rdx)
L(mm_return):
RETURN
/* Big length copy forward part. */
.p2align 4
L(mm_large_page_loop_forward):
movdqu (%r8, %rsi), %xmm0
movdqu 16(%r8, %rsi), %xmm1
movdqu 32(%r8, %rsi), %xmm2
movdqu 48(%r8, %rsi), %xmm3
movntdq %xmm0, (%r8)
movntdq %xmm1, 16(%r8)
movntdq %xmm2, 32(%r8)
movntdq %xmm3, 48(%r8)
lea 64(%r8), %r8
cmp %r8, %rbx
ja L(mm_large_page_loop_forward)
sfence
jmp L(mm_copy_remaining_forward)
/* Big length copy backward part. */
.p2align 4
L(mm_large_page_loop_backward):
movdqu -64(%r9, %r8), %xmm0
movdqu -48(%r9, %r8), %xmm1
movdqu -32(%r9, %r8), %xmm2
movdqu -16(%r9, %r8), %xmm3
movntdq %xmm0, -64(%r9)
movntdq %xmm1, -48(%r9)
movntdq %xmm2, -32(%r9)
movntdq %xmm3, -16(%r9)
lea -64(%r9), %r9
cmp %r9, %rbx
jb L(mm_large_page_loop_backward)
sfence
jmp L(mm_recalc_len)
END (MEMMOVE)
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