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;
; jdsample.asm - upsampling (SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2016, 2024, D. R. Commander.
;
; Based on the x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; For conditions of distribution and use, see copyright notice in jsimdext.inc
;
; This file should be assembled with NASM (Netwide Assembler) or Yasm.
%include "jsimdext.inc"
; --------------------------------------------------------------------------
SECTION SEG_CONST
ALIGNZ 32
GLOBAL_DATA(jconst_fancy_upsample_sse2)
EXTN(jconst_fancy_upsample_sse2):
PW_ONE times 8 dw 1
PW_TWO times 8 dw 2
PW_THREE times 8 dw 3
PW_SEVEN times 8 dw 7
PW_EIGHT times 8 dw 8
ALIGNZ 32
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Fancy processing for the common case of 2:1 horizontal and 1:1 vertical.
;
; The upsampling algorithm is linear interpolation between pixel centers,
; also known as a "triangle filter". This is a good compromise between
; speed and visual quality. The centers of the output pixels are 1/4 and 3/4
; of the way between input pixel centers.
;
; GLOBAL(void)
; jsimd_h2v1_fancy_upsample_sse2(int max_v_samp_factor,
; JDIMENSION downsampled_width,
; JSAMPARRAY input_data,
; JSAMPARRAY *output_data_ptr);
;
%define max_v_samp(b) (b) + 8 ; int max_v_samp_factor
%define downsamp_width(b) (b) + 12 ; JDIMENSION downsampled_width
%define input_data(b) (b) + 16 ; JSAMPARRAY input_data
%define output_data_ptr(b) (b) + 20 ; JSAMPARRAY *output_data_ptr
align 32
GLOBAL_FUNCTION(jsimd_h2v1_fancy_upsample_sse2)
EXTN(jsimd_h2v1_fancy_upsample_sse2):
push ebp
mov ebp, esp
PUSHPIC ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
GET_GOT ebx ; get GOT address
mov eax, JDIMENSION [downsamp_width(ebp)] ; colctr
test eax, eax
jz near .return
mov ecx, INT [max_v_samp(ebp)] ; rowctr
test ecx, ecx
jz near .return
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
mov edi, POINTER [output_data_ptr(ebp)]
mov edi, JSAMPARRAY [edi] ; output_data
ALIGNX 16, 7
.rowloop:
push eax ; colctr
push edi
push esi
mov esi, JSAMPROW [esi] ; inptr
mov edi, JSAMPROW [edi] ; outptr
test eax, SIZEOF_XMMWORD-1
jz short .skip
mov dl, JSAMPLE [esi+(eax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [esi+eax*SIZEOF_JSAMPLE], dl ; insert a dummy sample
.skip:
pxor xmm0, xmm0 ; xmm0=(all 0's)
pcmpeqb xmm7, xmm7
psrldq xmm7, (SIZEOF_XMMWORD-1)
pand xmm7, XMMWORD [esi+0*SIZEOF_XMMWORD]
add eax, byte SIZEOF_XMMWORD-1
and eax, byte -SIZEOF_XMMWORD
cmp eax, byte SIZEOF_XMMWORD
ja short .columnloop
ALIGNX 16, 7
.columnloop_last:
pcmpeqb xmm6, xmm6
pslldq xmm6, (SIZEOF_XMMWORD-1)
pand xmm6, XMMWORD [esi+0*SIZEOF_XMMWORD]
jmp short .upsample
ALIGNX 16, 7
.columnloop:
movdqa xmm6, XMMWORD [esi+1*SIZEOF_XMMWORD]
pslldq xmm6, (SIZEOF_XMMWORD-1)
.upsample:
movdqa xmm1, XMMWORD [esi+0*SIZEOF_XMMWORD]
movdqa xmm2, xmm1
movdqa xmm3, xmm1 ; xmm1=( 0 1 2 ... 13 14 15)
pslldq xmm2, 1 ; xmm2=(-- 0 1 ... 12 13 14)
psrldq xmm3, 1 ; xmm3=( 1 2 3 ... 14 15 --)
por xmm2, xmm7 ; xmm2=(-1 0 1 ... 12 13 14)
por xmm3, xmm6 ; xmm3=( 1 2 3 ... 14 15 16)
movdqa xmm7, xmm1
psrldq xmm7, (SIZEOF_XMMWORD-1) ; xmm7=(15 -- -- ... -- -- --)
movdqa xmm4, xmm1
punpcklbw xmm1, xmm0 ; xmm1=( 0 1 2 3 4 5 6 7)
punpckhbw xmm4, xmm0 ; xmm4=( 8 9 10 11 12 13 14 15)
movdqa xmm5, xmm2
punpcklbw xmm2, xmm0 ; xmm2=(-1 0 1 2 3 4 5 6)
punpckhbw xmm5, xmm0 ; xmm5=( 7 8 9 10 11 12 13 14)
movdqa xmm6, xmm3
punpcklbw xmm3, xmm0 ; xmm3=( 1 2 3 4 5 6 7 8)
punpckhbw xmm6, xmm0 ; xmm6=( 9 10 11 12 13 14 15 16)
pmullw xmm1, [GOTOFF(ebx,PW_THREE)]
pmullw xmm4, [GOTOFF(ebx,PW_THREE)]
paddw xmm2, [GOTOFF(ebx,PW_ONE)]
paddw xmm5, [GOTOFF(ebx,PW_ONE)]
paddw xmm3, [GOTOFF(ebx,PW_TWO)]
paddw xmm6, [GOTOFF(ebx,PW_TWO)]
paddw xmm2, xmm1
paddw xmm5, xmm4
psrlw xmm2, 2 ; xmm2=OutLE=( 0 2 4 6 8 10 12 14)
psrlw xmm5, 2 ; xmm5=OutHE=(16 18 20 22 24 26 28 30)
paddw xmm3, xmm1
paddw xmm6, xmm4
psrlw xmm3, 2 ; xmm3=OutLO=( 1 3 5 7 9 11 13 15)
psrlw xmm6, 2 ; xmm6=OutHO=(17 19 21 23 25 27 29 31)
psllw xmm3, BYTE_BIT
psllw xmm6, BYTE_BIT
por xmm2, xmm3 ; xmm2=OutL=( 0 1 2 ... 13 14 15)
por xmm5, xmm6 ; xmm5=OutH=(16 17 18 ... 29 30 31)
movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [edi+1*SIZEOF_XMMWORD], xmm5
sub eax, byte SIZEOF_XMMWORD
add esi, byte 1*SIZEOF_XMMWORD ; inptr
add edi, byte 2*SIZEOF_XMMWORD ; outptr
cmp eax, byte SIZEOF_XMMWORD
ja near .columnloop
test eax, eax
jnz near .columnloop_last
pop esi
pop edi
pop eax
add esi, byte SIZEOF_JSAMPROW ; input_data
add edi, byte SIZEOF_JSAMPROW ; output_data
dec ecx ; rowctr
jg near .rowloop
.return:
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
POPPIC ebx
pop ebp
ret
; --------------------------------------------------------------------------
;
; Fancy processing for the common case of 2:1 horizontal and 2:1 vertical.
; Again a triangle filter; see comments for h2v1 case, above.
;
; GLOBAL(void)
; jsimd_h2v2_fancy_upsample_sse2(int max_v_samp_factor,
; JDIMENSION downsampled_width,
; JSAMPARRAY input_data,
; JSAMPARRAY *output_data_ptr);
;
%define max_v_samp(b) (b) + 8 ; int max_v_samp_factor
%define downsamp_width(b) (b) + 12 ; JDIMENSION downsampled_width
%define input_data(b) (b) + 16 ; JSAMPARRAY input_data
%define output_data_ptr(b) (b) + 20 ; JSAMPARRAY *output_data_ptr
%define original_ebp ebp + 0
%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD
; xmmword wk[WK_NUM]
%define WK_NUM 4
%define gotptr wk(0) - SIZEOF_POINTER ; void *gotptr
align 32
GLOBAL_FUNCTION(jsimd_h2v2_fancy_upsample_sse2)
EXTN(jsimd_h2v2_fancy_upsample_sse2):
push ebp
mov eax, esp ; eax = original ebp
sub esp, byte 4
and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [esp], eax
mov ebp, esp ; ebp = aligned ebp
lea esp, [wk(0)]
PUSHPIC eax ; make a room for GOT address
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
GET_GOT ebx ; get GOT address
MOVPIC POINTER [gotptr], ebx ; save GOT address
mov edx, eax ; edx = original ebp
mov eax, JDIMENSION [downsamp_width(edx)] ; colctr
test eax, eax
jz near .return
mov ecx, INT [max_v_samp(edx)] ; rowctr
test ecx, ecx
jz near .return
mov esi, JSAMPARRAY [input_data(edx)] ; input_data
mov edi, POINTER [output_data_ptr(edx)]
mov edi, JSAMPARRAY [edi] ; output_data
ALIGNX 16, 7
.rowloop:
push eax ; colctr
push ecx
push edi
push esi
mov ecx, JSAMPROW [esi-1*SIZEOF_JSAMPROW] ; inptr1(above)
mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; inptr0
mov esi, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; inptr1(below)
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] ; outptr0
mov edi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] ; outptr1
test eax, SIZEOF_XMMWORD-1
jz short .skip
push edx
mov dl, JSAMPLE [ecx+(eax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [ecx+eax*SIZEOF_JSAMPLE], dl
mov dl, JSAMPLE [ebx+(eax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [ebx+eax*SIZEOF_JSAMPLE], dl
mov dl, JSAMPLE [esi+(eax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [esi+eax*SIZEOF_JSAMPLE], dl ; insert a dummy sample
pop edx
.skip:
; -- process the first column block
movdqa xmm0, XMMWORD [ebx+0*SIZEOF_XMMWORD] ; xmm0=row[ 0][0]
movdqa xmm1, XMMWORD [ecx+0*SIZEOF_XMMWORD] ; xmm1=row[-1][0]
movdqa xmm2, XMMWORD [esi+0*SIZEOF_XMMWORD] ; xmm2=row[+1][0]
PUSHPIC ebx
MOVPIC ebx, POINTER [gotptr] ; load GOT address
pxor xmm3, xmm3 ; xmm3=(all 0's)
movdqa xmm4, xmm0
punpcklbw xmm0, xmm3 ; xmm0=row[ 0]( 0 1 2 3 4 5 6 7)
punpckhbw xmm4, xmm3 ; xmm4=row[ 0]( 8 9 10 11 12 13 14 15)
movdqa xmm5, xmm1
punpcklbw xmm1, xmm3 ; xmm1=row[-1]( 0 1 2 3 4 5 6 7)
punpckhbw xmm5, xmm3 ; xmm5=row[-1]( 8 9 10 11 12 13 14 15)
movdqa xmm6, xmm2
punpcklbw xmm2, xmm3 ; xmm2=row[+1]( 0 1 2 3 4 5 6 7)
punpckhbw xmm6, xmm3 ; xmm6=row[+1]( 8 9 10 11 12 13 14 15)
pmullw xmm0, [GOTOFF(ebx,PW_THREE)]
pmullw xmm4, [GOTOFF(ebx,PW_THREE)]
pcmpeqb xmm7, xmm7
psrldq xmm7, (SIZEOF_XMMWORD-2)
paddw xmm1, xmm0 ; xmm1=Int0L=( 0 1 2 3 4 5 6 7)
paddw xmm5, xmm4 ; xmm5=Int0H=( 8 9 10 11 12 13 14 15)
paddw xmm2, xmm0 ; xmm2=Int1L=( 0 1 2 3 4 5 6 7)
paddw xmm6, xmm4 ; xmm6=Int1H=( 8 9 10 11 12 13 14 15)
movdqa XMMWORD [edx+0*SIZEOF_XMMWORD], xmm1 ; temporarily save
movdqa XMMWORD [edx+1*SIZEOF_XMMWORD], xmm5 ; the intermediate data
movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [edi+1*SIZEOF_XMMWORD], xmm6
pand xmm1, xmm7 ; xmm1=( 0 -- -- -- -- -- -- --)
pand xmm2, xmm7 ; xmm2=( 0 -- -- -- -- -- -- --)
movdqa XMMWORD [wk(0)], xmm1
movdqa XMMWORD [wk(1)], xmm2
POPPIC ebx
add eax, byte SIZEOF_XMMWORD-1
and eax, byte -SIZEOF_XMMWORD
cmp eax, byte SIZEOF_XMMWORD
ja short .columnloop
ALIGNX 16, 7
.columnloop_last:
; -- process the last column block
PUSHPIC ebx
MOVPIC ebx, POINTER [gotptr] ; load GOT address
pcmpeqb xmm1, xmm1
pslldq xmm1, (SIZEOF_XMMWORD-2)
movdqa xmm2, xmm1
pand xmm1, XMMWORD [edx+1*SIZEOF_XMMWORD]
pand xmm2, XMMWORD [edi+1*SIZEOF_XMMWORD]
movdqa XMMWORD [wk(2)], xmm1 ; xmm1=(-- -- -- -- -- -- -- 15)
movdqa XMMWORD [wk(3)], xmm2 ; xmm2=(-- -- -- -- -- -- -- 15)
jmp near .upsample
ALIGNX 16, 7
.columnloop:
; -- process the next column block
movdqa xmm0, XMMWORD [ebx+1*SIZEOF_XMMWORD] ; xmm0=row[ 0][1]
movdqa xmm1, XMMWORD [ecx+1*SIZEOF_XMMWORD] ; xmm1=row[-1][1]
movdqa xmm2, XMMWORD [esi+1*SIZEOF_XMMWORD] ; xmm2=row[+1][1]
PUSHPIC ebx
MOVPIC ebx, POINTER [gotptr] ; load GOT address
pxor xmm3, xmm3 ; xmm3=(all 0's)
movdqa xmm4, xmm0
punpcklbw xmm0, xmm3 ; xmm0=row[ 0]( 0 1 2 3 4 5 6 7)
punpckhbw xmm4, xmm3 ; xmm4=row[ 0]( 8 9 10 11 12 13 14 15)
movdqa xmm5, xmm1
punpcklbw xmm1, xmm3 ; xmm1=row[-1]( 0 1 2 3 4 5 6 7)
punpckhbw xmm5, xmm3 ; xmm5=row[-1]( 8 9 10 11 12 13 14 15)
movdqa xmm6, xmm2
punpcklbw xmm2, xmm3 ; xmm2=row[+1]( 0 1 2 3 4 5 6 7)
punpckhbw xmm6, xmm3 ; xmm6=row[+1]( 8 9 10 11 12 13 14 15)
pmullw xmm0, [GOTOFF(ebx,PW_THREE)]
pmullw xmm4, [GOTOFF(ebx,PW_THREE)]
paddw xmm1, xmm0 ; xmm1=Int0L=( 0 1 2 3 4 5 6 7)
paddw xmm5, xmm4 ; xmm5=Int0H=( 8 9 10 11 12 13 14 15)
paddw xmm2, xmm0 ; xmm2=Int1L=( 0 1 2 3 4 5 6 7)
paddw xmm6, xmm4 ; xmm6=Int1H=( 8 9 10 11 12 13 14 15)
movdqa XMMWORD [edx+2*SIZEOF_XMMWORD], xmm1 ; temporarily save
movdqa XMMWORD [edx+3*SIZEOF_XMMWORD], xmm5 ; the intermediate data
movdqa XMMWORD [edi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [edi+3*SIZEOF_XMMWORD], xmm6
pslldq xmm1, (SIZEOF_XMMWORD-2) ; xmm1=(-- -- -- -- -- -- -- 0)
pslldq xmm2, (SIZEOF_XMMWORD-2) ; xmm2=(-- -- -- -- -- -- -- 0)
movdqa XMMWORD [wk(2)], xmm1
movdqa XMMWORD [wk(3)], xmm2
.upsample:
; -- process the upper row
movdqa xmm7, XMMWORD [edx+0*SIZEOF_XMMWORD]
movdqa xmm3, XMMWORD [edx+1*SIZEOF_XMMWORD]
movdqa xmm0, xmm7 ; xmm7=Int0L=( 0 1 2 3 4 5 6 7)
movdqa xmm4, xmm3 ; xmm3=Int0H=( 8 9 10 11 12 13 14 15)
psrldq xmm0, 2 ; xmm0=( 1 2 3 4 5 6 7 --)
pslldq xmm4, (SIZEOF_XMMWORD-2) ; xmm4=(-- -- -- -- -- -- -- 8)
movdqa xmm5, xmm7
movdqa xmm6, xmm3
psrldq xmm5, (SIZEOF_XMMWORD-2) ; xmm5=( 7 -- -- -- -- -- -- --)
pslldq xmm6, 2 ; xmm6=(-- 8 9 10 11 12 13 14)
por xmm0, xmm4 ; xmm0=( 1 2 3 4 5 6 7 8)
por xmm5, xmm6 ; xmm5=( 7 8 9 10 11 12 13 14)
movdqa xmm1, xmm7
movdqa xmm2, xmm3
pslldq xmm1, 2 ; xmm1=(-- 0 1 2 3 4 5 6)
psrldq xmm2, 2 ; xmm2=( 9 10 11 12 13 14 15 --)
movdqa xmm4, xmm3
psrldq xmm4, (SIZEOF_XMMWORD-2) ; xmm4=(15 -- -- -- -- -- -- --)
por xmm1, XMMWORD [wk(0)] ; xmm1=(-1 0 1 2 3 4 5 6)
por xmm2, XMMWORD [wk(2)] ; xmm2=( 9 10 11 12 13 14 15 16)
movdqa XMMWORD [wk(0)], xmm4
pmullw xmm7, [GOTOFF(ebx,PW_THREE)]
pmullw xmm3, [GOTOFF(ebx,PW_THREE)]
paddw xmm1, [GOTOFF(ebx,PW_EIGHT)]
paddw xmm5, [GOTOFF(ebx,PW_EIGHT)]
paddw xmm0, [GOTOFF(ebx,PW_SEVEN)]
paddw xmm2, [GOTOFF(ebx,PW_SEVEN)]
paddw xmm1, xmm7
paddw xmm5, xmm3
psrlw xmm1, 4 ; xmm1=Out0LE=( 0 2 4 6 8 10 12 14)
psrlw xmm5, 4 ; xmm5=Out0HE=(16 18 20 22 24 26 28 30)
paddw xmm0, xmm7
paddw xmm2, xmm3
psrlw xmm0, 4 ; xmm0=Out0LO=( 1 3 5 7 9 11 13 15)
psrlw xmm2, 4 ; xmm2=Out0HO=(17 19 21 23 25 27 29 31)
psllw xmm0, BYTE_BIT
psllw xmm2, BYTE_BIT
por xmm1, xmm0 ; xmm1=Out0L=( 0 1 2 ... 13 14 15)
por xmm5, xmm2 ; xmm5=Out0H=(16 17 18 ... 29 30 31)
movdqa XMMWORD [edx+0*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [edx+1*SIZEOF_XMMWORD], xmm5
; -- process the lower row
movdqa xmm6, XMMWORD [edi+0*SIZEOF_XMMWORD]
movdqa xmm4, XMMWORD [edi+1*SIZEOF_XMMWORD]
movdqa xmm7, xmm6 ; xmm6=Int1L=( 0 1 2 3 4 5 6 7)
movdqa xmm3, xmm4 ; xmm4=Int1H=( 8 9 10 11 12 13 14 15)
psrldq xmm7, 2 ; xmm7=( 1 2 3 4 5 6 7 --)
pslldq xmm3, (SIZEOF_XMMWORD-2) ; xmm3=(-- -- -- -- -- -- -- 8)
movdqa xmm0, xmm6
movdqa xmm2, xmm4
psrldq xmm0, (SIZEOF_XMMWORD-2) ; xmm0=( 7 -- -- -- -- -- -- --)
pslldq xmm2, 2 ; xmm2=(-- 8 9 10 11 12 13 14)
por xmm7, xmm3 ; xmm7=( 1 2 3 4 5 6 7 8)
por xmm0, xmm2 ; xmm0=( 7 8 9 10 11 12 13 14)
movdqa xmm1, xmm6
movdqa xmm5, xmm4
pslldq xmm1, 2 ; xmm1=(-- 0 1 2 3 4 5 6)
psrldq xmm5, 2 ; xmm5=( 9 10 11 12 13 14 15 --)
movdqa xmm3, xmm4
psrldq xmm3, (SIZEOF_XMMWORD-2) ; xmm3=(15 -- -- -- -- -- -- --)
por xmm1, XMMWORD [wk(1)] ; xmm1=(-1 0 1 2 3 4 5 6)
por xmm5, XMMWORD [wk(3)] ; xmm5=( 9 10 11 12 13 14 15 16)
movdqa XMMWORD [wk(1)], xmm3
pmullw xmm6, [GOTOFF(ebx,PW_THREE)]
pmullw xmm4, [GOTOFF(ebx,PW_THREE)]
paddw xmm1, [GOTOFF(ebx,PW_EIGHT)]
paddw xmm0, [GOTOFF(ebx,PW_EIGHT)]
paddw xmm7, [GOTOFF(ebx,PW_SEVEN)]
paddw xmm5, [GOTOFF(ebx,PW_SEVEN)]
paddw xmm1, xmm6
paddw xmm0, xmm4
psrlw xmm1, 4 ; xmm1=Out1LE=( 0 2 4 6 8 10 12 14)
psrlw xmm0, 4 ; xmm0=Out1HE=(16 18 20 22 24 26 28 30)
paddw xmm7, xmm6
paddw xmm5, xmm4
psrlw xmm7, 4 ; xmm7=Out1LO=( 1 3 5 7 9 11 13 15)
psrlw xmm5, 4 ; xmm5=Out1HO=(17 19 21 23 25 27 29 31)
psllw xmm7, BYTE_BIT
psllw xmm5, BYTE_BIT
por xmm1, xmm7 ; xmm1=Out1L=( 0 1 2 ... 13 14 15)
por xmm0, xmm5 ; xmm0=Out1H=(16 17 18 ... 29 30 31)
movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [edi+1*SIZEOF_XMMWORD], xmm0
POPPIC ebx
sub eax, byte SIZEOF_XMMWORD
add ecx, byte 1*SIZEOF_XMMWORD ; inptr1(above)
add ebx, byte 1*SIZEOF_XMMWORD ; inptr0
add esi, byte 1*SIZEOF_XMMWORD ; inptr1(below)
add edx, byte 2*SIZEOF_XMMWORD ; outptr0
add edi, byte 2*SIZEOF_XMMWORD ; outptr1
cmp eax, byte SIZEOF_XMMWORD
ja near .columnloop
test eax, eax
jnz near .columnloop_last
pop esi
pop edi
pop ecx
pop eax
add esi, byte 1*SIZEOF_JSAMPROW ; input_data
add edi, byte 2*SIZEOF_JSAMPROW ; output_data
sub ecx, byte 2 ; rowctr
jg near .rowloop
.return:
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
pop ebx
mov esp, ebp ; esp <- aligned ebp
pop esp ; esp <- original ebp
pop ebp
ret
; --------------------------------------------------------------------------
;
; Fast processing for the common case of 2:1 horizontal and 1:1 vertical.
; It's still a box filter.
;
; GLOBAL(void)
; jsimd_h2v1_upsample_sse2(int max_v_samp_factor, JDIMENSION output_width,
; JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr);
;
%define max_v_samp(b) (b) + 8 ; int max_v_samp_factor
%define output_width(b) (b) + 12 ; JDIMENSION output_width
%define input_data(b) (b) + 16 ; JSAMPARRAY input_data
%define output_data_ptr(b) (b) + 20 ; JSAMPARRAY *output_data_ptr
align 32
GLOBAL_FUNCTION(jsimd_h2v1_upsample_sse2)
EXTN(jsimd_h2v1_upsample_sse2):
push ebp
mov ebp, esp
; push ebx ; unused
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
mov edx, JDIMENSION [output_width(ebp)]
add edx, byte (2*SIZEOF_XMMWORD)-1
and edx, byte -(2*SIZEOF_XMMWORD)
jz short .return
mov ecx, INT [max_v_samp(ebp)] ; rowctr
test ecx, ecx
jz short .return
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
mov edi, POINTER [output_data_ptr(ebp)]
mov edi, JSAMPARRAY [edi] ; output_data
ALIGNX 16, 7
.rowloop:
push edi
push esi
mov esi, JSAMPROW [esi] ; inptr
mov edi, JSAMPROW [edi] ; outptr
mov eax, edx ; colctr
ALIGNX 16, 7
.columnloop:
movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
movdqa xmm1, xmm0
punpcklbw xmm0, xmm0
punpckhbw xmm1, xmm1
movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [edi+1*SIZEOF_XMMWORD], xmm1
sub eax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
movdqa xmm2, XMMWORD [esi+1*SIZEOF_XMMWORD]
movdqa xmm3, xmm2
punpcklbw xmm2, xmm2
punpckhbw xmm3, xmm3
movdqa XMMWORD [edi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [edi+3*SIZEOF_XMMWORD], xmm3
sub eax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
add esi, byte 2*SIZEOF_XMMWORD ; inptr
add edi, byte 4*SIZEOF_XMMWORD ; outptr
jmp short .columnloop
ALIGNX 16, 7
.nextrow:
pop esi
pop edi
add esi, byte SIZEOF_JSAMPROW ; input_data
add edi, byte SIZEOF_JSAMPROW ; output_data
dec ecx ; rowctr
jg short .rowloop
.return:
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
; pop ebx ; unused
pop ebp
ret
; --------------------------------------------------------------------------
;
; Fast processing for the common case of 2:1 horizontal and 2:1 vertical.
; It's still a box filter.
;
; GLOBAL(void)
; jsimd_h2v2_upsample_sse2(int max_v_samp_factor, JDIMENSION output_width,
; JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr);
;
%define max_v_samp(b) (b) + 8 ; int max_v_samp_factor
%define output_width(b) (b) + 12 ; JDIMENSION output_width
%define input_data(b) (b) + 16 ; JSAMPARRAY input_data
%define output_data_ptr(b) (b) + 20 ; JSAMPARRAY *output_data_ptr
align 32
GLOBAL_FUNCTION(jsimd_h2v2_upsample_sse2)
EXTN(jsimd_h2v2_upsample_sse2):
push ebp
mov ebp, esp
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
mov edx, JDIMENSION [output_width(ebp)]
add edx, byte (2*SIZEOF_XMMWORD)-1
and edx, byte -(2*SIZEOF_XMMWORD)
jz near .return
mov ecx, INT [max_v_samp(ebp)] ; rowctr
test ecx, ecx
jz near .return
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
mov edi, POINTER [output_data_ptr(ebp)]
mov edi, JSAMPARRAY [edi] ; output_data
ALIGNX 16, 7
.rowloop:
push edi
push esi
mov esi, JSAMPROW [esi] ; inptr
mov ebx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] ; outptr0
mov edi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] ; outptr1
mov eax, edx ; colctr
ALIGNX 16, 7
.columnloop:
movdqa xmm0, XMMWORD [esi+0*SIZEOF_XMMWORD]
movdqa xmm1, xmm0
punpcklbw xmm0, xmm0
punpckhbw xmm1, xmm1
movdqa XMMWORD [ebx+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [ebx+1*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [edi+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [edi+1*SIZEOF_XMMWORD], xmm1
sub eax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
movdqa xmm2, XMMWORD [esi+1*SIZEOF_XMMWORD]
movdqa xmm3, xmm2
punpcklbw xmm2, xmm2
punpckhbw xmm3, xmm3
movdqa XMMWORD [ebx+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [ebx+3*SIZEOF_XMMWORD], xmm3
movdqa XMMWORD [edi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [edi+3*SIZEOF_XMMWORD], xmm3
sub eax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
add esi, byte 2*SIZEOF_XMMWORD ; inptr
add ebx, byte 4*SIZEOF_XMMWORD ; outptr0
add edi, byte 4*SIZEOF_XMMWORD ; outptr1
jmp short .columnloop
ALIGNX 16, 7
.nextrow:
pop esi
pop edi
add esi, byte 1*SIZEOF_JSAMPROW ; input_data
add edi, byte 2*SIZEOF_JSAMPROW ; output_data
sub ecx, byte 2 ; rowctr
jg short .rowloop
.return:
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
pop ebx
pop ebp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 32