;
; jdsample.asm - upsampling (64-bit SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2009, 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),
; can *not* be assembled with Microsoft's MASM or any compatible
; assembler (including Borland's Turbo Assembler).
; NASM is available from http://nasm.sourceforge.net/ or
; http://sourceforge.net/project/showfiles.php?group_id=6208
;
; [TAB8]
%include "jsimdext.inc"
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 16
global EXTN(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 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 64
;
; 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);
;
; r10 = int max_v_samp_factor
; r11 = JDIMENSION downsampled_width
; r12 = JSAMPARRAY input_data
; r13 = JSAMPARRAY *output_data_ptr
align 16
global EXTN(jsimd_h2v1_fancy_upsample_sse2)
EXTN(jsimd_h2v1_fancy_upsample_sse2):
push rbp
mov rax,rsp
mov rbp,rsp
collect_args
mov eax, r11d ; colctr
test rax,rax
jz near .return
mov rcx, r10 ; rowctr
test rcx,rcx
jz near .return
mov rsi, r12 ; input_data
mov rdi, r13
mov rdi, JSAMPARRAY [rdi] ; output_data
.rowloop:
push rax ; colctr
push rdi
push rsi
mov rsi, JSAMPROW [rsi] ; inptr
mov rdi, JSAMPROW [rdi] ; outptr
test rax, SIZEOF_XMMWORD-1
jz short .skip
mov dl, JSAMPLE [rsi+(rax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [rsi+rax*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 [rsi+0*SIZEOF_XMMWORD]
add rax, byte SIZEOF_XMMWORD-1
and rax, byte -SIZEOF_XMMWORD
cmp rax, byte SIZEOF_XMMWORD
ja short .columnloop
.columnloop_last:
pcmpeqb xmm6,xmm6
pslldq xmm6,(SIZEOF_XMMWORD-1)
pand xmm6, XMMWORD [rsi+0*SIZEOF_XMMWORD]
jmp short .upsample
.columnloop:
movdqa xmm6, XMMWORD [rsi+1*SIZEOF_XMMWORD]
pslldq xmm6,(SIZEOF_XMMWORD-1)
.upsample:
movdqa xmm1, XMMWORD [rsi+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,[rel PW_THREE]
pmullw xmm4,[rel PW_THREE]
paddw xmm2,[rel PW_ONE]
paddw xmm5,[rel PW_ONE]
paddw xmm3,[rel PW_TWO]
paddw xmm6,[rel 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 [rdi+0*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rdi+1*SIZEOF_XMMWORD], xmm5
sub rax, byte SIZEOF_XMMWORD
add rsi, byte 1*SIZEOF_XMMWORD ; inptr
add rdi, byte 2*SIZEOF_XMMWORD ; outptr
cmp rax, byte SIZEOF_XMMWORD
ja near .columnloop
test eax,eax
jnz near .columnloop_last
pop rsi
pop rdi
pop rax
add rsi, byte SIZEOF_JSAMPROW ; input_data
add rdi, byte SIZEOF_JSAMPROW ; output_data
dec rcx ; rowctr
jg near .rowloop
.return:
uncollect_args
pop rbp
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);
;
; r10 = int max_v_samp_factor
; r11 = JDIMENSION downsampled_width
; r12 = JSAMPARRAY input_data
; r13 = JSAMPARRAY *output_data_ptr
%define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
%define WK_NUM 4
align 16
global EXTN(jsimd_h2v2_fancy_upsample_sse2)
EXTN(jsimd_h2v2_fancy_upsample_sse2):
push rbp
mov rax,rsp ; rax = original rbp
sub rsp, byte 4
and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [rsp],rax
mov rbp,rsp ; rbp = aligned rbp
lea rsp, [wk(0)]
collect_args
push rbx
mov eax, r11d ; colctr
test rax,rax
jz near .return
mov rcx, r10 ; rowctr
test rcx,rcx
jz near .return
mov rsi, r12 ; input_data
mov rdi, r13
mov rdi, JSAMPARRAY [rdi] ; output_data
.rowloop:
push rax ; colctr
push rcx
push rdi
push rsi
mov rcx, JSAMPROW [rsi-1*SIZEOF_JSAMPROW] ; inptr1(above)
mov rbx, JSAMPROW [rsi+0*SIZEOF_JSAMPROW] ; inptr0
mov rsi, JSAMPROW [rsi+1*SIZEOF_JSAMPROW] ; inptr1(below)
mov rdx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] ; outptr0
mov rdi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] ; outptr1
test rax, SIZEOF_XMMWORD-1
jz short .skip
push rdx
mov dl, JSAMPLE [rcx+(rax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [rcx+rax*SIZEOF_JSAMPLE], dl
mov dl, JSAMPLE [rbx+(rax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [rbx+rax*SIZEOF_JSAMPLE], dl
mov dl, JSAMPLE [rsi+(rax-1)*SIZEOF_JSAMPLE]
mov JSAMPLE [rsi+rax*SIZEOF_JSAMPLE], dl ; insert a dummy sample
pop rdx
.skip:
; -- process the first column block
movdqa xmm0, XMMWORD [rbx+0*SIZEOF_XMMWORD] ; xmm0=row[ 0][0]
movdqa xmm1, XMMWORD [rcx+0*SIZEOF_XMMWORD] ; xmm1=row[-1][0]
movdqa xmm2, XMMWORD [rsi+0*SIZEOF_XMMWORD] ; xmm2=row[+1][0]
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,[rel PW_THREE]
pmullw xmm4,[rel 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 [rdx+0*SIZEOF_XMMWORD], xmm1 ; temporarily save
movdqa XMMWORD [rdx+1*SIZEOF_XMMWORD], xmm5 ; the intermediate data
movdqa XMMWORD [rdi+0*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rdi+1*SIZEOF_XMMWORD], xmm6
pand xmm1,xmm7 ; xmm1=( 0 -- -- -- -- -- -- --)
pand xmm2,xmm7 ; xmm2=( 0 -- -- -- -- -- -- --)
movdqa XMMWORD [wk(0)], xmm1
movdqa XMMWORD [wk(1)], xmm2
add rax, byte SIZEOF_XMMWORD-1
and rax, byte -SIZEOF_XMMWORD
cmp rax, byte SIZEOF_XMMWORD
ja short .columnloop
.columnloop_last:
; -- process the last column block
pcmpeqb xmm1,xmm1
pslldq xmm1,(SIZEOF_XMMWORD-2)
movdqa xmm2,xmm1
pand xmm1, XMMWORD [rdx+1*SIZEOF_XMMWORD]
pand xmm2, XMMWORD [rdi+1*SIZEOF_XMMWORD]
movdqa XMMWORD [wk(2)], xmm1 ; xmm1=(-- -- -- -- -- -- -- 15)
movdqa XMMWORD [wk(3)], xmm2 ; xmm2=(-- -- -- -- -- -- -- 15)
jmp near .upsample
.columnloop:
; -- process the next column block
movdqa xmm0, XMMWORD [rbx+1*SIZEOF_XMMWORD] ; xmm0=row[ 0][1]
movdqa xmm1, XMMWORD [rcx+1*SIZEOF_XMMWORD] ; xmm1=row[-1][1]
movdqa xmm2, XMMWORD [rsi+1*SIZEOF_XMMWORD] ; xmm2=row[+1][1]
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,[rel PW_THREE]
pmullw xmm4,[rel 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 [rdx+2*SIZEOF_XMMWORD], xmm1 ; temporarily save
movdqa XMMWORD [rdx+3*SIZEOF_XMMWORD], xmm5 ; the intermediate data
movdqa XMMWORD [rdi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rdi+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 [rdx+0*SIZEOF_XMMWORD]
movdqa xmm3, XMMWORD [rdx+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,[rel PW_THREE]
pmullw xmm3,[rel PW_THREE]
paddw xmm1,[rel PW_EIGHT]
paddw xmm5,[rel PW_EIGHT]
paddw xmm0,[rel PW_SEVEN]
paddw xmm2,[rel 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 [rdx+0*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [rdx+1*SIZEOF_XMMWORD], xmm5
; -- process the lower row
movdqa xmm6, XMMWORD [rdi+0*SIZEOF_XMMWORD]
movdqa xmm4, XMMWORD [rdi+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,[rel PW_THREE]
pmullw xmm4,[rel PW_THREE]
paddw xmm1,[rel PW_EIGHT]
paddw xmm0,[rel PW_EIGHT]
paddw xmm7,[rel PW_SEVEN]
paddw xmm5,[rel 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 [rdi+0*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [rdi+1*SIZEOF_XMMWORD], xmm0
sub rax, byte SIZEOF_XMMWORD
add rcx, byte 1*SIZEOF_XMMWORD ; inptr1(above)
add rbx, byte 1*SIZEOF_XMMWORD ; inptr0
add rsi, byte 1*SIZEOF_XMMWORD ; inptr1(below)
add rdx, byte 2*SIZEOF_XMMWORD ; outptr0
add rdi, byte 2*SIZEOF_XMMWORD ; outptr1
cmp rax, byte SIZEOF_XMMWORD
ja near .columnloop
test rax,rax
jnz near .columnloop_last
pop rsi
pop rdi
pop rcx
pop rax
add rsi, byte 1*SIZEOF_JSAMPROW ; input_data
add rdi, byte 2*SIZEOF_JSAMPROW ; output_data
sub rcx, byte 2 ; rowctr
jg near .rowloop
.return:
pop rbx
uncollect_args
mov rsp,rbp ; rsp <- aligned rbp
pop rsp ; rsp <- original rbp
pop rbp
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);
;
; r10 = int max_v_samp_factor
; r11 = JDIMENSION output_width
; r12 = JSAMPARRAY input_data
; r13 = JSAMPARRAY *output_data_ptr
align 16
global EXTN(jsimd_h2v1_upsample_sse2)
EXTN(jsimd_h2v1_upsample_sse2):
push rbp
mov rax,rsp
mov rbp,rsp
collect_args
mov edx, r11d
add rdx, byte (2*SIZEOF_XMMWORD)-1
and rdx, byte -(2*SIZEOF_XMMWORD)
jz near .return
mov rcx, r10 ; rowctr
test rcx,rcx
jz short .return
mov rsi, r12 ; input_data
mov rdi, r13
mov rdi, JSAMPARRAY [rdi] ; output_data
.rowloop:
push rdi
push rsi
mov rsi, JSAMPROW [rsi] ; inptr
mov rdi, JSAMPROW [rdi] ; outptr
mov rax,rdx ; colctr
.columnloop:
movdqa xmm0, XMMWORD [rsi+0*SIZEOF_XMMWORD]
movdqa xmm1,xmm0
punpcklbw xmm0,xmm0
punpckhbw xmm1,xmm1
movdqa XMMWORD [rdi+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [rdi+1*SIZEOF_XMMWORD], xmm1
sub rax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
movdqa xmm2, XMMWORD [rsi+1*SIZEOF_XMMWORD]
movdqa xmm3,xmm2
punpcklbw xmm2,xmm2
punpckhbw xmm3,xmm3
movdqa XMMWORD [rdi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rdi+3*SIZEOF_XMMWORD], xmm3
sub rax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
add rsi, byte 2*SIZEOF_XMMWORD ; inptr
add rdi, byte 4*SIZEOF_XMMWORD ; outptr
jmp short .columnloop
.nextrow:
pop rsi
pop rdi
add rsi, byte SIZEOF_JSAMPROW ; input_data
add rdi, byte SIZEOF_JSAMPROW ; output_data
dec rcx ; rowctr
jg short .rowloop
.return:
uncollect_args
pop rbp
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 (nt max_v_samp_factor,
; JDIMENSION output_width,
; JSAMPARRAY input_data,
; JSAMPARRAY *output_data_ptr);
;
; r10 = int max_v_samp_factor
; r11 = JDIMENSION output_width
; r12 = JSAMPARRAY input_data
; r13 = JSAMPARRAY *output_data_ptr
align 16
global EXTN(jsimd_h2v2_upsample_sse2)
EXTN(jsimd_h2v2_upsample_sse2):
push rbp
mov rax,rsp
mov rbp,rsp
collect_args
push rbx
mov edx, r11d
add rdx, byte (2*SIZEOF_XMMWORD)-1
and rdx, byte -(2*SIZEOF_XMMWORD)
jz near .return
mov rcx, r10 ; rowctr
test rcx,rcx
jz near .return
mov rsi, r12 ; input_data
mov rdi, r13
mov rdi, JSAMPARRAY [rdi] ; output_data
.rowloop:
push rdi
push rsi
mov rsi, JSAMPROW [rsi] ; inptr
mov rbx, JSAMPROW [rdi+0*SIZEOF_JSAMPROW] ; outptr0
mov rdi, JSAMPROW [rdi+1*SIZEOF_JSAMPROW] ; outptr1
mov rax,rdx ; colctr
.columnloop:
movdqa xmm0, XMMWORD [rsi+0*SIZEOF_XMMWORD]
movdqa xmm1,xmm0
punpcklbw xmm0,xmm0
punpckhbw xmm1,xmm1
movdqa XMMWORD [rbx+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [rbx+1*SIZEOF_XMMWORD], xmm1
movdqa XMMWORD [rdi+0*SIZEOF_XMMWORD], xmm0
movdqa XMMWORD [rdi+1*SIZEOF_XMMWORD], xmm1
sub rax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
movdqa xmm2, XMMWORD [rsi+1*SIZEOF_XMMWORD]
movdqa xmm3,xmm2
punpcklbw xmm2,xmm2
punpckhbw xmm3,xmm3
movdqa XMMWORD [rbx+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rbx+3*SIZEOF_XMMWORD], xmm3
movdqa XMMWORD [rdi+2*SIZEOF_XMMWORD], xmm2
movdqa XMMWORD [rdi+3*SIZEOF_XMMWORD], xmm3
sub rax, byte 2*SIZEOF_XMMWORD
jz short .nextrow
add rsi, byte 2*SIZEOF_XMMWORD ; inptr
add rbx, byte 4*SIZEOF_XMMWORD ; outptr0
add rdi, byte 4*SIZEOF_XMMWORD ; outptr1
jmp short .columnloop
.nextrow:
pop rsi
pop rdi
add rsi, byte 1*SIZEOF_JSAMPROW ; input_data
add rdi, byte 2*SIZEOF_JSAMPROW ; output_data
sub rcx, byte 2 ; rowctr
jg near .rowloop
.return:
pop rbx
uncollect_args
pop rbp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 16