ref: a0944ba19fb4969fc6b3a55c7189a482a9cd3e4f
dir: /vp8/common/x86/mfqe_sse2.asm/
;
; Copyright (c) 2012 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "vpx_ports/x86_abi_support.asm"
SECTION .text
;void vp8_filter_by_weight16x16_sse2
;(
; unsigned char *src,
; int src_stride,
; unsigned char *dst,
; int dst_stride,
; int src_weight
;)
global sym(vp8_filter_by_weight16x16_sse2) PRIVATE
sym(vp8_filter_by_weight16x16_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
SAVE_XMM 6
GET_GOT rbx
push rsi
push rdi
; end prolog
movd xmm0, arg(4) ; src_weight
pshuflw xmm0, xmm0, 0x0 ; replicate to all low words
punpcklqdq xmm0, xmm0 ; replicate to all hi words
movdqa xmm1, [GLOBAL(tMFQE)]
psubw xmm1, xmm0 ; dst_weight
mov rax, arg(0) ; src
mov rsi, arg(1) ; src_stride
mov rdx, arg(2) ; dst
mov rdi, arg(3) ; dst_stride
mov rcx, 16 ; loop count
pxor xmm6, xmm6
.combine:
movdqa xmm2, [rax]
movdqa xmm4, [rdx]
add rax, rsi
; src * src_weight
movdqa xmm3, xmm2
punpcklbw xmm2, xmm6
punpckhbw xmm3, xmm6
pmullw xmm2, xmm0
pmullw xmm3, xmm0
; dst * dst_weight
movdqa xmm5, xmm4
punpcklbw xmm4, xmm6
punpckhbw xmm5, xmm6
pmullw xmm4, xmm1
pmullw xmm5, xmm1
; sum, round and shift
paddw xmm2, xmm4
paddw xmm3, xmm5
paddw xmm2, [GLOBAL(tMFQE_round)]
paddw xmm3, [GLOBAL(tMFQE_round)]
psrlw xmm2, 4
psrlw xmm3, 4
packuswb xmm2, xmm3
movdqa [rdx], xmm2
add rdx, rdi
dec rcx
jnz .combine
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
RESTORE_XMM
UNSHADOW_ARGS
pop rbp
ret
;void vp8_filter_by_weight8x8_sse2
;(
; unsigned char *src,
; int src_stride,
; unsigned char *dst,
; int dst_stride,
; int src_weight
;)
global sym(vp8_filter_by_weight8x8_sse2) PRIVATE
sym(vp8_filter_by_weight8x8_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 5
GET_GOT rbx
push rsi
push rdi
; end prolog
movd xmm0, arg(4) ; src_weight
pshuflw xmm0, xmm0, 0x0 ; replicate to all low words
punpcklqdq xmm0, xmm0 ; replicate to all hi words
movdqa xmm1, [GLOBAL(tMFQE)]
psubw xmm1, xmm0 ; dst_weight
mov rax, arg(0) ; src
mov rsi, arg(1) ; src_stride
mov rdx, arg(2) ; dst
mov rdi, arg(3) ; dst_stride
mov rcx, 8 ; loop count
pxor xmm4, xmm4
.combine:
movq xmm2, [rax]
movq xmm3, [rdx]
add rax, rsi
; src * src_weight
punpcklbw xmm2, xmm4
pmullw xmm2, xmm0
; dst * dst_weight
punpcklbw xmm3, xmm4
pmullw xmm3, xmm1
; sum, round and shift
paddw xmm2, xmm3
paddw xmm2, [GLOBAL(tMFQE_round)]
psrlw xmm2, 4
packuswb xmm2, xmm4
movq [rdx], xmm2
add rdx, rdi
dec rcx
jnz .combine
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
;void vp8_variance_and_sad_16x16_sse2 | arg
;(
; unsigned char *src1, 0
; int stride1, 1
; unsigned char *src2, 2
; int stride2, 3
; unsigned int *variance, 4
; unsigned int *sad, 5
;)
global sym(vp8_variance_and_sad_16x16_sse2) PRIVATE
sym(vp8_variance_and_sad_16x16_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 6
GET_GOT rbx
push rsi
push rdi
; end prolog
mov rax, arg(0) ; src1
mov rcx, arg(1) ; stride1
mov rdx, arg(2) ; src2
mov rdi, arg(3) ; stride2
mov rsi, 16 ; block height
; Prep accumulator registers
pxor xmm3, xmm3 ; SAD
pxor xmm4, xmm4 ; sum of src2
pxor xmm5, xmm5 ; sum of src2^2
; Because we're working with the actual output frames
; we can't depend on any kind of data alignment.
.accumulate:
movdqa xmm0, [rax] ; src1
movdqa xmm1, [rdx] ; src2
add rax, rcx ; src1 + stride1
add rdx, rdi ; src2 + stride2
; SAD(src1, src2)
psadbw xmm0, xmm1
paddusw xmm3, xmm0
; SUM(src2)
pxor xmm2, xmm2
psadbw xmm2, xmm1 ; sum src2 by misusing SAD against 0
paddusw xmm4, xmm2
; pmaddubsw would be ideal if it took two unsigned values. instead,
; it expects a signed and an unsigned value. so instead we zero extend
; and operate on words.
pxor xmm2, xmm2
movdqa xmm0, xmm1
punpcklbw xmm0, xmm2
punpckhbw xmm1, xmm2
pmaddwd xmm0, xmm0
pmaddwd xmm1, xmm1
paddd xmm5, xmm0
paddd xmm5, xmm1
sub rsi, 1
jnz .accumulate
; phaddd only operates on adjacent double words.
; Finalize SAD and store
movdqa xmm0, xmm3
psrldq xmm0, 8
paddusw xmm0, xmm3
paddd xmm0, [GLOBAL(t128)]
psrld xmm0, 8
mov rax, arg(5)
movd [rax], xmm0
; Accumulate sum of src2
movdqa xmm0, xmm4
psrldq xmm0, 8
paddusw xmm0, xmm4
; Square src2. Ignore high value
pmuludq xmm0, xmm0
psrld xmm0, 8
; phaddw could be used to sum adjacent values but we want
; all the values summed. promote to doubles, accumulate,
; shift and sum
pxor xmm2, xmm2
movdqa xmm1, xmm5
punpckldq xmm1, xmm2
punpckhdq xmm5, xmm2
paddd xmm1, xmm5
movdqa xmm2, xmm1
psrldq xmm1, 8
paddd xmm1, xmm2
psubd xmm1, xmm0
; (variance + 128) >> 8
paddd xmm1, [GLOBAL(t128)]
psrld xmm1, 8
mov rax, arg(4)
movd [rax], xmm1
; begin epilog
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret
SECTION_RODATA
align 16
t128:
%ifndef __NASM_VER__
ddq 128
%elif CONFIG_BIG_ENDIAN
dq 0, 128
%else
dq 128, 0
%endif
align 16
tMFQE: ; 1 << MFQE_PRECISION
times 8 dw 0x10
align 16
tMFQE_round: ; 1 << (MFQE_PRECISION - 1)
times 8 dw 0x08