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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_vect_mul_avx(len, mul_array, src, dest)
;;;
%include "reg_sizes.asm"
%ifidn __OUTPUT_FORMAT__, elf64
%define arg0 rdi
%define arg1 rsi
%define arg2 rdx
%define arg3 rcx
%define return rax
%define func(x) x: endbranch
%define FUNC_SAVE
%define FUNC_RESTORE
%elifidn __OUTPUT_FORMAT__, win64
%define arg0 rcx
%define arg1 rdx
%define arg2 r8
%define arg3 r9
%define return rax
%define stack_size 5*16 + 8 ; must be an odd multiple of 8
%define func(x) proc_frame x
%macro FUNC_SAVE 0
alloc_stack stack_size
vmovdqa [rsp + 0*16], xmm6
vmovdqa [rsp + 1*16], xmm7
vmovdqa [rsp + 2*16], xmm13
vmovdqa [rsp + 3*16], xmm14
vmovdqa [rsp + 4*16], xmm15
end_prolog
%endmacro
%macro FUNC_RESTORE 0
vmovdqa xmm6, [rsp + 0*16]
vmovdqa xmm7, [rsp + 1*16]
vmovdqa xmm13, [rsp + 2*16]
vmovdqa xmm14, [rsp + 3*16]
vmovdqa xmm15, [rsp + 4*16]
add rsp, stack_size
%endmacro
%endif
%define len arg0
%define mul_array arg1
%define src arg2
%define dest arg3
%define pos return
%define tmp r11
;;; Use Non-temporal load/stor
%ifdef NO_NT_LDST
%define XLDR vmovdqa
%define XSTR vmovdqa
%else
%define XLDR vmovntdqa
%define XSTR vmovntdq
%endif
default rel
[bits 64]
section .text
%define xmask0f xmm15
%define xgft_lo xmm14
%define xgft_hi xmm13
%define x0 xmm0
%define xtmp1a xmm1
%define xtmp1b xmm2
%define xtmp1c xmm3
%define x1 xmm4
%define xtmp2a xmm5
%define xtmp2b xmm6
%define xtmp2c xmm7
align 16
global gf_vect_mul_avx, function
func(gf_vect_mul_avx)
; Check if length is multiple of 32 bytes
mov tmp, len
and tmp, 0x1f
jnz return_fail
FUNC_SAVE
mov pos, 0
vmovdqa xmask0f, [mask0f] ;Load mask of lower nibble in each byte
vmovdqu xgft_lo, [mul_array] ;Load array Cx{00}, Cx{01}, Cx{02}, ...
vmovdqu xgft_hi, [mul_array+16] ; " Cx{00}, Cx{10}, Cx{20}, ... , Cx{f0}
loop32:
XLDR x0, [src+pos] ;Get next source vector
XLDR x1, [src+pos+16] ;Get next source vector + 16B ahead
add pos, 32 ;Loop on 16 bytes at a time
cmp pos, len
vpand xtmp1a, x0, xmask0f ;Mask low src nibble in bits 4-0
vpand xtmp2a, x1, xmask0f
vpsraw x0, x0, 4 ;Shift to put high nibble into bits 4-0
vpsraw x1, x1, 4
vpand x0, x0, xmask0f ;Mask high src nibble in bits 4-0
vpand x1, x1, xmask0f
vpshufb xtmp1b, xgft_hi, x0 ;Lookup mul table of high nibble
vpshufb xtmp1c, xgft_lo, xtmp1a ;Lookup mul table of low nibble
vpshufb xtmp2b, xgft_hi, x1 ;Lookup mul table of high nibble
vpshufb xtmp2c, xgft_lo, xtmp2a ;Lookup mul table of low nibble
vpxor xtmp1b, xtmp1b, xtmp1c ;GF add high and low partials
vpxor xtmp2b, xtmp2b, xtmp2c
XSTR [dest+pos-32], xtmp1b ;Store result
XSTR [dest+pos-16], xtmp2b ;Store +16B result
jl loop32
FUNC_RESTORE
return_pass:
xor return, return
ret
return_fail:
mov return, 1
ret
endproc_frame
section .data
align 16
mask0f:
dq 0x0f0f0f0f0f0f0f0f, 0x0f0f0f0f0f0f0f0f
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