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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Copyright(c) 2011-2015 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.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; gf_2vect_mad_avx(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 tmp2 r10
%define return rax
%define return.w eax
%define stack_size 16*9 + 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
save_reg r12, 9*16 + 0*8
save_reg r15, 9*16 + 1*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]
mov r12, [rsp + 9*16 + 0*8]
mov r15, [rsp + 9*16 + 1*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 tmp2 r10
%define return rax
%define return.w eax
%define func(x) x: endbranch
%define FUNC_SAVE
%define FUNC_RESTORE
%endif
;;; gf_2vect_mad_avx(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 tmp2
%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 xmm14
%define xgft1_lo xmm13
%define xgft1_hi xmm12
%define xgft2_lo xmm11
%define xgft2_hi xmm10
%define x0 xmm0
%define xtmpa xmm1
%define xtmph1 xmm2
%define xtmpl1 xmm3
%define xtmph2 xmm4
%define xtmpl2 xmm5
%define xd1 xmm6
%define xd2 xmm7
%define xtmpd1 xmm8
%define xtmpd2 xmm9
align 16
global gf_2vect_mad_avx, function
func(gf_2vect_mad_avx)
FUNC_SAVE
sub len, 16
jl .return_fail
xor pos, pos
vmovdqa xmask0f, [mask0f] ;Load mask of lower nibble in each byte
sal vec_i, 5 ;Multiply by 32
sal vec, 5
lea tmp, [mul_array + vec_i]
vmovdqu xgft1_lo, [tmp] ;Load array Ax{00}, Ax{01}, Ax{02}, ...
vmovdqu xgft1_hi, [tmp+16] ; " Ax{00}, Ax{10}, Ax{20}, ... , Ax{f0}
vmovdqu xgft2_lo, [tmp+vec] ;Load array Bx{00}, Bx{01}, Bx{02}, ...
vmovdqu xgft2_hi, [tmp+vec+16] ; " Bx{00}, Bx{10}, Bx{20}, ... , Bx{f0}
mov dest2, [dest1+PS]
mov dest1, [dest1]
XLDR xtmpd1, [dest1+len] ;backup the last 16 bytes in dest
XLDR xtmpd2, [dest2+len] ;backup the last 16 bytes in dest
.loop16:
XLDR xd1, [dest1+pos] ;Get next dest vector
XLDR xd2, [dest2+pos] ;Get next dest vector
.loop16_overlap:
XLDR x0, [src+pos] ;Get next source vector
vpand xtmpa, 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
vpshufb xtmph1, xgft1_hi, x0 ;Lookup mul table of high nibble
vpshufb xtmpl1, xgft1_lo, xtmpa ;Lookup mul table of low nibble
vpxor xtmph1, xtmph1, xtmpl1 ;GF add high and low partials
vpxor xd1, xd1, xtmph1 ;xd1 += partial
vpshufb xtmph2, xgft2_hi, x0 ;Lookup mul table of high nibble
vpshufb xtmpl2, xgft2_lo, xtmpa ;Lookup mul table of low nibble
vpxor xtmph2, xtmph2, xtmpl2 ;GF add high and low partials
vpxor xd2, xd2, xtmph2 ;xd2 += partial
XSTR [dest1+pos], xd1
XSTR [dest2+pos], xd2
add pos, 16 ;Loop on 16 bytes at a time
cmp pos, len
jle .loop16
lea tmp, [len + 16]
cmp pos, tmp
je .return_pass
;; Tail len
mov pos, len ;Overlapped offset length-16
vmovdqa xd1, xtmpd1 ;Restore xd1
vmovdqa xd2, xtmpd2 ;Restore xd2
jmp .loop16_overlap ;Do one more overlap pass
.return_pass:
mov return, 0
FUNC_RESTORE
ret
.return_fail:
mov return, 1
FUNC_RESTORE
ret
endproc_frame
section .data
align 16
mask0f: dq 0x0f0f0f0f0f0f0f0f, 0x0f0f0f0f0f0f0f0f
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