isa-l/erasure_code/gf_6vect_mad_avx2.asm

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;;;
;;; gf_6vect_mad_avx2(len, vec, vec_i, mul_array, src, dest);
;;;

%include "reg_sizes.asm"

%define PS 8

%ifidn __OUTPUT_FORMAT__, win64
 %define arg0  rcx
 %define arg0.w ecx
 %define arg1  rdx
 %define arg2  r8
 %define arg3  r9
 %define arg4  r12
 %define arg5  r15
 %define tmp    r11
 %define tmp.w  r11d
 %define tmp.b  r11b
 %define tmp2   r10
 %define tmp3   r13
 %define return rax
 %define return.w eax
 %define stack_size 16*10 + 3*8
 %define arg(x)      [rsp + stack_size + PS + PS*x]
 %define func(x) proc_frame x

%macro FUNC_SAVE 0
	sub	rsp, stack_size
	movdqa	[rsp+16*0],xmm6
	movdqa	[rsp+16*1],xmm7
	movdqa	[rsp+16*2],xmm8
	movdqa	[rsp+16*3],xmm9
	movdqa	[rsp+16*4],xmm10
	movdqa	[rsp+16*5],xmm11
	movdqa	[rsp+16*6],xmm12
	movdqa	[rsp+16*7],xmm13
	movdqa	[rsp+16*8],xmm14
	movdqa	[rsp+16*9],xmm15
	save_reg	r12,  10*16 + 0*8
	save_reg	r13,  10*16 + 1*8
	save_reg	r15,  10*16 + 2*8
	end_prolog
	mov	arg4, arg(4)
	mov	arg5, arg(5)
%endmacro

%macro FUNC_RESTORE 0
	movdqa	xmm6, [rsp+16*0]
	movdqa	xmm7, [rsp+16*1]
	movdqa	xmm8, [rsp+16*2]
	movdqa	xmm9, [rsp+16*3]
	movdqa	xmm10, [rsp+16*4]
	movdqa	xmm11, [rsp+16*5]
	movdqa	xmm12, [rsp+16*6]
	movdqa	xmm13, [rsp+16*7]
	movdqa	xmm14, [rsp+16*8]
	movdqa	xmm15, [rsp+16*9]
	mov	r12,  [rsp + 10*16 + 0*8]
	mov	r13,  [rsp + 10*16 + 1*8]
	mov	r15,  [rsp + 10*16 + 2*8]
	add	rsp, stack_size
%endmacro

%elifidn __OUTPUT_FORMAT__, elf64
 %define arg0  rdi
 %define arg0.w edi
 %define arg1  rsi
 %define arg2  rdx
 %define arg3  rcx
 %define arg4  r8
 %define arg5  r9
 %define tmp   r11
 %define tmp.w r11d
 %define tmp.b r11b
 %define tmp2   r10
 %define tmp3   r12
 %define return rax
 %define return.w eax

 %define func(x) x:
 %macro FUNC_SAVE 0
	push	r12
 %endmacro
 %macro FUNC_RESTORE 0
	pop	r12
 %endmacro
%endif

;;; gf_6vect_mad_avx2(len, vec, vec_i, mul_array, src, dest)
%define len   arg0
%define len.w arg0.w
%define vec    arg1
%define vec_i    arg2
%define mul_array arg3
%define	src   arg4
%define dest1  arg5
%define pos   return
%define pos.w return.w

%define dest2 tmp3
%define dest3 tmp2
%define dest4 mul_array
%define dest5 vec
%define dest6 vec_i

%ifndef EC_ALIGNED_ADDR
;;; Use Un-aligned load/store
 %define XLDR vmovdqu
 %define XSTR vmovdqu
%else
;;; Use Non-temporal load/stor
 %ifdef NO_NT_LDST
  %define XLDR vmovdqa
  %define XSTR vmovdqa
 %else
  %define XLDR vmovntdqa
  %define XSTR vmovntdq
 %endif
%endif


default rel

[bits 64]
section .text

%define xmask0f  ymm15
%define xmask0fx  xmm15
%define xgft1_lo  ymm14
%define xgft2_lo  ymm13
%define xgft3_lo  ymm12
%define xgft4_lo  ymm11
%define xgft5_lo  ymm10
%define xgft6_lo  ymm9

%define x0         ymm0
%define xtmpa      ymm1
%define xtmpl      ymm2
%define xtmplx     xmm2
%define xtmph      ymm3
%define xtmphx     xmm3
%define xd1        ymm4
%define xd2        ymm5
%define xd3        ymm6
%define xd4        ymm7
%define xd5        ymm8
%define xd6        xd1

align 16
global gf_6vect_mad_avx2:ISAL_SYM_TYPE_FUNCTION
func(gf_6vect_mad_avx2)
	FUNC_SAVE
	sub	len, 32
	jl	.return_fail
	xor	pos, pos
	mov	tmp.b, 0x0f
	vpinsrb	xmask0fx, xmask0fx, tmp.w, 0
	vpbroadcastb xmask0f, xmask0fx	;Construct mask 0x0f0f0f...

	sal	vec_i, 5		;Multiply by 32
	sal	vec, 5			;Multiply by 32
	lea	tmp, [mul_array + vec_i]
	mov	vec_i, vec
	mov	mul_array, vec
	sal	vec_i, 1
	sal	mul_array, 1
	add	vec_i, vec		;vec_i=vec*96
	add	mul_array, vec_i	;vec_i=vec*160

	vmovdqu	xgft1_lo, [tmp]			;Load array Ax{00}, Ax{01}, ..., Ax{0f}
						;     "     Ax{00}, Ax{10}, ..., Ax{f0}
	vmovdqu	xgft2_lo, [tmp+vec]		;Load array Bx{00}, Bx{01}, ..., Bx{0f}
						;     "     Bx{00}, Bx{10}, ..., Bx{f0}
	vmovdqu	xgft3_lo, [tmp+2*vec]		;Load array Cx{00}, Cx{01}, ..., Cx{0f}
						;     "     Cx{00}, Cx{10}, ..., Cx{f0}
	vmovdqu	xgft4_lo, [tmp+vec_i]		;Load array Fx{00}, Fx{01}, ..., Fx{0f}
						;     "     Fx{00}, Fx{10}, ..., Fx{f0}
	vmovdqu	xgft5_lo, [tmp+4*vec]		;Load array Ex{00}, Ex{01}, ..., Ex{0f}
						;     "     Ex{00}, Ex{10}, ..., Ex{f0}
	vmovdqu	xgft6_lo, [tmp+mul_array]	;Load array Dx{00}, Dx{01}, ..., Dx{0f}
						;     "     Dx{00}, Dx{10}, ..., Dx{f0}

	mov	dest2, [dest1+PS]    ; reuse tmp3
	mov	dest3, [dest1+2*PS]  ; reuse tmp2
	mov	dest4, [dest1+3*PS]  ; reuse mul_array
	mov	dest5, [dest1+4*PS]  ; reuse vec
	mov	dest6, [dest1+5*PS]  ; reuse vec_i
	mov	dest1, [dest1]

.loop32:
	XLDR	x0, [src+pos]		;Get next source vector
	XLDR	xd1, [dest1+pos]	;Get next dest vector
	XLDR	xd2, [dest2+pos]	;Get next dest vector
	XLDR	xd3, [dest3+pos]	;Get next dest vector
	XLDR	xd4, [dest4+pos]	;Get next dest vector
	XLDR	xd5, [dest5+pos]	;Get next dest vector

	vpand	xtmpl, x0, xmask0f	;Mask low src nibble in bits 4-0
	vpsraw	x0, x0, 4		;Shift to put high nibble into bits 4-0
	vpand	x0, x0, xmask0f		;Mask high src nibble in bits 4-0
	vperm2i128 xtmpa, xtmpl, x0, 0x30 	;swap xtmpa from 1lo|2lo to 1lo|2hi
	vperm2i128 x0, xtmpl, x0, 0x12	;swap x0 from    1hi|2hi to 1hi|2lo

	;dest1
	vperm2i128 xtmph, xgft1_lo, xgft1_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft1_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd1, xd1, xtmph		;xd1 += partial

	XSTR	[dest1+pos], xd1	;Store result into dest1

	;dest2
	vperm2i128 xtmph, xgft2_lo, xgft2_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft2_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd2, xd2, xtmph		;xd2 += partial

	;dest3
	vperm2i128 xtmph, xgft3_lo, xgft3_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft3_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd3, xd3, xtmph		;xd3 += partial

	XLDR	xd6, [dest6+pos]	;reuse xd1. Get next dest vector

	;dest4
	vperm2i128 xtmph, xgft4_lo, xgft4_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft4_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd4, xd4, xtmph		;xd4 += partial

	;dest5
	vperm2i128 xtmph, xgft5_lo, xgft5_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft5_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd5, xd5, xtmph		;xd5 += partial

	;dest6
	vperm2i128 xtmph, xgft6_lo, xgft6_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xtmpl, xgft6_lo, xtmpa		;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xtmpl		;GF add high and low partials
	vpxor	xd6, xd6, xtmph		;xd6 += partial

	XSTR	[dest2+pos], xd2	;Store result into dest2
	XSTR	[dest3+pos], xd3	;Store result into dest3
	XSTR	[dest4+pos], xd4	;Store result into dest4
	XSTR	[dest5+pos], xd5	;Store result into dest5
	XSTR	[dest6+pos], xd6	;Store result into dest6

	add	pos, 32			;Loop on 32 bytes at a time
	cmp	pos, len
	jle	.loop32

	lea	tmp, [len + 32]
	cmp	pos, tmp
	je	.return_pass

.lessthan32:
	;; Tail len
	;; Do one more overlap pass
	mov	tmp.b, 0x1f
	vpinsrb	xtmphx, xtmphx, tmp.w, 0
	vpbroadcastb xtmph, xtmphx	;Construct mask 0x1f1f1f...

	mov	tmp, len		;Overlapped offset length-32

	XLDR	x0, [src+tmp]		;Get next source vector
	XLDR	xd1, [dest1+tmp]	;Get next dest vector
	XLDR	xd2, [dest2+tmp]	;Get next dest vector
	XLDR	xd3, [dest3+tmp]	;Get next dest vector
	XLDR	xd4, [dest4+tmp]	;Get next dest vector
	XLDR	xd5, [dest5+tmp]	;Get next dest vector

	sub	len, pos

	vpinsrb	xtmplx, xtmplx, len.w, 15
	vinserti128	xtmpl, xtmpl, xtmplx, 1 ;swapped to xtmplx | xtmplx
	vpshufb	xtmpl, xtmpl, xtmph	;Broadcast len to all bytes. xtmph=0x1f1f1f...
	vpcmpgtb	xtmpl, xtmpl, [constip32]

	vpand	xtmph, x0, xmask0f	;Mask low src nibble in bits 4-0
	vpsraw	x0, x0, 4		;Shift to put high nibble into bits 4-0
	vpand	x0, x0, xmask0f		;Mask high src nibble in bits 4-0
	vperm2i128 xtmpa, xtmph, x0, 0x30 	;swap xtmpa from 1lo|2lo to 1lo|2hi
	vperm2i128 x0, xtmph, x0, 0x12	;swap x0 from    1hi|2hi to 1hi|2lo

	;dest1
	vperm2i128 xtmph, xgft1_lo, xgft1_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft1_lo, xgft1_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft1_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd1, xd1, xtmph		;xd1 += partial

	XSTR	[dest1+tmp], xd1	;Store result into dest1

	;dest2
	vperm2i128 xtmph, xgft2_lo, xgft2_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft2_lo, xgft2_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft2_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd2, xd2, xtmph		;xd2 += partial

	;dest3
	vperm2i128 xtmph, xgft3_lo, xgft3_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft3_lo, xgft3_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft3_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd3, xd3, xtmph		;xd3 += partial

	XLDR	xd6, [dest6+tmp]	;reuse xd1. Get next dest vector

	;dest4
	vperm2i128 xtmph, xgft4_lo, xgft4_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft4_lo, xgft4_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft4_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd4, xd4, xtmph		;xd4 += partial

	;dest5
	vperm2i128 xtmph, xgft5_lo, xgft5_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft5_lo, xgft5_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft5_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd5, xd5, xtmph		;xd5 += partial

	;dest6
	vperm2i128 xtmph, xgft6_lo, xgft6_lo, 0x01 ; swapped to hi | lo
	vpshufb	xtmph, xtmph, x0		;Lookup mul table of high nibble
	vpshufb	xgft6_lo, xgft6_lo, xtmpa	;Lookup mul table of low nibble
	vpxor	xtmph, xtmph, xgft6_lo		;GF add high and low partials
	vpand	xtmph, xtmph, xtmpl
	vpxor	xd6, xd6, xtmph		;xd6 += partial

	XSTR	[dest2+tmp], xd2	;Store result into dest2
	XSTR	[dest3+tmp], xd3	;Store result into dest3
	XSTR	[dest4+tmp], xd4	;Store result into dest4
	XSTR	[dest5+tmp], xd5	;Store result into dest5
	XSTR	[dest6+tmp], xd6	;Store result into dest6

.return_pass:
	FUNC_RESTORE
	mov	return, 0
	ret

.return_fail:
	FUNC_RESTORE
	mov	return, 1
	ret

endproc_frame

section .data
align 32
constip32:
	dq 0xf8f9fafbfcfdfeff, 0xf0f1f2f3f4f5f6f7
	dq 0xe8e9eaebecedeeef, 0xe0e1e2e3e4e5e6e7

;;;       func              core, ver, snum
slversion gf_6vect_mad_avx2, 04,  01,  0211