mirror of
https://bitbucket.org/CPMADevs/cnq3
synced 2024-12-14 06:11:23 +00:00
324 lines
9.4 KiB
NASM
324 lines
9.4 KiB
NASM
|
;
|
||
|
|
; jcsample.asm - downsampling (MMX)
|
||
|
|
;
|
||
|
|
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
|
||
|
|
;
|
||
|
|
; 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_TEXT
|
||
|
|
BITS 32
|
||
|
|
;
|
||
|
|
; Downsample pixel values of a single component.
|
||
|
|
; This version handles the common case of 2:1 horizontal and 1:1 vertical,
|
||
|
|
; without smoothing.
|
||
|
|
;
|
||
|
|
; GLOBAL(void)
|
||
|
|
; jsimd_h2v1_downsample_mmx (JDIMENSION image_width, int max_v_samp_factor,
|
||
|
|
; JDIMENSION v_samp_factor, JDIMENSION width_blocks,
|
||
|
|
; JSAMPARRAY input_data, JSAMPARRAY output_data);
|
||
|
|
;
|
||
|
|
|
||
|
|
%define img_width(b) (b)+8 ; JDIMENSION image_width
|
||
|
|
%define max_v_samp(b) (b)+12 ; int max_v_samp_factor
|
||
|
|
%define v_samp(b) (b)+16 ; JDIMENSION v_samp_factor
|
||
|
|
%define width_blks(b) (b)+20 ; JDIMENSION width_blocks
|
||
|
|
%define input_data(b) (b)+24 ; JSAMPARRAY input_data
|
||
|
|
%define output_data(b) (b)+28 ; JSAMPARRAY output_data
|
||
|
|
|
||
|
|
align 16
|
||
|
|
global EXTN(jsimd_h2v1_downsample_mmx)
|
||
|
|
|
||
|
|
EXTN(jsimd_h2v1_downsample_mmx):
|
||
|
|
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 ecx, JDIMENSION [width_blks(ebp)]
|
||
|
|
shl ecx,3 ; imul ecx,DCTSIZE (ecx = output_cols)
|
||
|
|
jz near .return
|
||
|
|
|
||
|
|
mov edx, JDIMENSION [img_width(ebp)]
|
||
|
|
|
||
|
|
; -- expand_right_edge
|
||
|
|
|
||
|
|
push ecx
|
||
|
|
shl ecx,1 ; output_cols * 2
|
||
|
|
sub ecx,edx
|
||
|
|
jle short .expand_end
|
||
|
|
|
||
|
|
mov eax, INT [max_v_samp(ebp)]
|
||
|
|
test eax,eax
|
||
|
|
jle short .expand_end
|
||
|
|
|
||
|
|
cld
|
||
|
|
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
|
||
|
|
alignx 16,7
|
||
|
|
.expandloop:
|
||
|
|
push eax
|
||
|
|
push ecx
|
||
|
|
|
||
|
|
mov edi, JSAMPROW [esi]
|
||
|
|
add edi,edx
|
||
|
|
mov al, JSAMPLE [edi-1]
|
||
|
|
|
||
|
|
rep stosb
|
||
|
|
|
||
|
|
pop ecx
|
||
|
|
pop eax
|
||
|
|
|
||
|
|
add esi, byte SIZEOF_JSAMPROW
|
||
|
|
dec eax
|
||
|
|
jg short .expandloop
|
||
|
|
|
||
|
|
.expand_end:
|
||
|
|
pop ecx ; output_cols
|
||
|
|
|
||
|
|
; -- h2v1_downsample
|
||
|
|
|
||
|
|
mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
|
||
|
|
test eax,eax
|
||
|
|
jle near .return
|
||
|
|
|
||
|
|
mov edx, 0x00010000 ; bias pattern
|
||
|
|
movd mm7,edx
|
||
|
|
pcmpeqw mm6,mm6
|
||
|
|
punpckldq mm7,mm7 ; mm7={0, 1, 0, 1}
|
||
|
|
psrlw mm6,BYTE_BIT ; mm6={0xFF 0x00 0xFF 0x00 ..}
|
||
|
|
|
||
|
|
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
|
||
|
|
mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
|
||
|
|
alignx 16,7
|
||
|
|
.rowloop:
|
||
|
|
push ecx
|
||
|
|
push edi
|
||
|
|
push esi
|
||
|
|
|
||
|
|
mov esi, JSAMPROW [esi] ; inptr
|
||
|
|
mov edi, JSAMPROW [edi] ; outptr
|
||
|
|
alignx 16,7
|
||
|
|
.columnloop:
|
||
|
|
|
||
|
|
movq mm0, MMWORD [esi+0*SIZEOF_MMWORD]
|
||
|
|
movq mm1, MMWORD [esi+1*SIZEOF_MMWORD]
|
||
|
|
movq mm2,mm0
|
||
|
|
movq mm3,mm1
|
||
|
|
|
||
|
|
pand mm0,mm6
|
||
|
|
psrlw mm2,BYTE_BIT
|
||
|
|
pand mm1,mm6
|
||
|
|
psrlw mm3,BYTE_BIT
|
||
|
|
|
||
|
|
paddw mm0,mm2
|
||
|
|
paddw mm1,mm3
|
||
|
|
paddw mm0,mm7
|
||
|
|
paddw mm1,mm7
|
||
|
|
psrlw mm0,1
|
||
|
|
psrlw mm1,1
|
||
|
|
|
||
|
|
packuswb mm0,mm1
|
||
|
|
|
||
|
|
movq MMWORD [edi+0*SIZEOF_MMWORD], mm0
|
||
|
|
|
||
|
|
add esi, byte 2*SIZEOF_MMWORD ; inptr
|
||
|
|
add edi, byte 1*SIZEOF_MMWORD ; outptr
|
||
|
|
sub ecx, byte SIZEOF_MMWORD ; outcol
|
||
|
|
jnz short .columnloop
|
||
|
|
|
||
|
|
pop esi
|
||
|
|
pop edi
|
||
|
|
pop ecx
|
||
|
|
|
||
|
|
add esi, byte SIZEOF_JSAMPROW ; input_data
|
||
|
|
add edi, byte SIZEOF_JSAMPROW ; output_data
|
||
|
|
dec eax ; rowctr
|
||
|
|
jg short .rowloop
|
||
|
|
|
||
|
|
emms ; empty MMX state
|
||
|
|
|
||
|
|
.return:
|
||
|
|
pop edi
|
||
|
|
pop esi
|
||
|
|
; pop edx ; need not be preserved
|
||
|
|
; pop ecx ; need not be preserved
|
||
|
|
; pop ebx ; unused
|
||
|
|
pop ebp
|
||
|
|
ret
|
||
|
|
|
||
|
|
; --------------------------------------------------------------------------
|
||
|
|
;
|
||
|
|
; Downsample pixel values of a single component.
|
||
|
|
; This version handles the standard case of 2:1 horizontal and 2:1 vertical,
|
||
|
|
; without smoothing.
|
||
|
|
;
|
||
|
|
; GLOBAL(void)
|
||
|
|
; jsimd_h2v2_downsample_mmx (JDIMENSION image_width, int max_v_samp_factor,
|
||
|
|
; JDIMENSION v_samp_factor, JDIMENSION width_blocks,
|
||
|
|
; JSAMPARRAY input_data, JSAMPARRAY output_data);
|
||
|
|
;
|
||
|
|
|
||
|
|
%define img_width(b) (b)+8 ; JDIMENSION image_width
|
||
|
|
%define max_v_samp(b) (b)+12 ; int max_v_samp_factor
|
||
|
|
%define v_samp(b) (b)+16 ; JDIMENSION v_samp_factor
|
||
|
|
%define width_blks(b) (b)+20 ; JDIMENSION width_blocks
|
||
|
|
%define input_data(b) (b)+24 ; JSAMPARRAY input_data
|
||
|
|
%define output_data(b) (b)+28 ; JSAMPARRAY output_data
|
||
|
|
|
||
|
|
align 16
|
||
|
|
global EXTN(jsimd_h2v2_downsample_mmx)
|
||
|
|
|
||
|
|
EXTN(jsimd_h2v2_downsample_mmx):
|
||
|
|
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 ecx, JDIMENSION [width_blks(ebp)]
|
||
|
|
shl ecx,3 ; imul ecx,DCTSIZE (ecx = output_cols)
|
||
|
|
jz near .return
|
||
|
|
|
||
|
|
mov edx, JDIMENSION [img_width(ebp)]
|
||
|
|
|
||
|
|
; -- expand_right_edge
|
||
|
|
|
||
|
|
push ecx
|
||
|
|
shl ecx,1 ; output_cols * 2
|
||
|
|
sub ecx,edx
|
||
|
|
jle short .expand_end
|
||
|
|
|
||
|
|
mov eax, INT [max_v_samp(ebp)]
|
||
|
|
test eax,eax
|
||
|
|
jle short .expand_end
|
||
|
|
|
||
|
|
cld
|
||
|
|
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
|
||
|
|
alignx 16,7
|
||
|
|
.expandloop:
|
||
|
|
push eax
|
||
|
|
push ecx
|
||
|
|
|
||
|
|
mov edi, JSAMPROW [esi]
|
||
|
|
add edi,edx
|
||
|
|
mov al, JSAMPLE [edi-1]
|
||
|
|
|
||
|
|
rep stosb
|
||
|
|
|
||
|
|
pop ecx
|
||
|
|
pop eax
|
||
|
|
|
||
|
|
add esi, byte SIZEOF_JSAMPROW
|
||
|
|
dec eax
|
||
|
|
jg short .expandloop
|
||
|
|
|
||
|
|
.expand_end:
|
||
|
|
pop ecx ; output_cols
|
||
|
|
|
||
|
|
; -- h2v2_downsample
|
||
|
|
|
||
|
|
mov eax, JDIMENSION [v_samp(ebp)] ; rowctr
|
||
|
|
test eax,eax
|
||
|
|
jle near .return
|
||
|
|
|
||
|
|
mov edx, 0x00020001 ; bias pattern
|
||
|
|
movd mm7,edx
|
||
|
|
pcmpeqw mm6,mm6
|
||
|
|
punpckldq mm7,mm7 ; mm7={1, 2, 1, 2}
|
||
|
|
psrlw mm6,BYTE_BIT ; mm6={0xFF 0x00 0xFF 0x00 ..}
|
||
|
|
|
||
|
|
mov esi, JSAMPARRAY [input_data(ebp)] ; input_data
|
||
|
|
mov edi, JSAMPARRAY [output_data(ebp)] ; output_data
|
||
|
|
alignx 16,7
|
||
|
|
.rowloop:
|
||
|
|
push ecx
|
||
|
|
push edi
|
||
|
|
push esi
|
||
|
|
|
||
|
|
mov edx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; inptr0
|
||
|
|
mov esi, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; inptr1
|
||
|
|
mov edi, JSAMPROW [edi] ; outptr
|
||
|
|
alignx 16,7
|
||
|
|
.columnloop:
|
||
|
|
|
||
|
|
movq mm0, MMWORD [edx+0*SIZEOF_MMWORD]
|
||
|
|
movq mm1, MMWORD [esi+0*SIZEOF_MMWORD]
|
||
|
|
movq mm2, MMWORD [edx+1*SIZEOF_MMWORD]
|
||
|
|
movq mm3, MMWORD [esi+1*SIZEOF_MMWORD]
|
||
|
|
|
||
|
|
movq mm4,mm0
|
||
|
|
movq mm5,mm1
|
||
|
|
pand mm0,mm6
|
||
|
|
psrlw mm4,BYTE_BIT
|
||
|
|
pand mm1,mm6
|
||
|
|
psrlw mm5,BYTE_BIT
|
||
|
|
paddw mm0,mm4
|
||
|
|
paddw mm1,mm5
|
||
|
|
|
||
|
|
movq mm4,mm2
|
||
|
|
movq mm5,mm3
|
||
|
|
pand mm2,mm6
|
||
|
|
psrlw mm4,BYTE_BIT
|
||
|
|
pand mm3,mm6
|
||
|
|
psrlw mm5,BYTE_BIT
|
||
|
|
paddw mm2,mm4
|
||
|
|
paddw mm3,mm5
|
||
|
|
|
||
|
|
paddw mm0,mm1
|
||
|
|
paddw mm2,mm3
|
||
|
|
paddw mm0,mm7
|
||
|
|
paddw mm2,mm7
|
||
|
|
psrlw mm0,2
|
||
|
|
psrlw mm2,2
|
||
|
|
|
||
|
|
packuswb mm0,mm2
|
||
|
|
|
||
|
|
movq MMWORD [edi+0*SIZEOF_MMWORD], mm0
|
||
|
|
|
||
|
|
add edx, byte 2*SIZEOF_MMWORD ; inptr0
|
||
|
|
add esi, byte 2*SIZEOF_MMWORD ; inptr1
|
||
|
|
add edi, byte 1*SIZEOF_MMWORD ; outptr
|
||
|
|
sub ecx, byte SIZEOF_MMWORD ; outcol
|
||
|
|
jnz near .columnloop
|
||
|
|
|
||
|
|
pop esi
|
||
|
|
pop edi
|
||
|
|
pop ecx
|
||
|
|
|
||
|
|
add esi, byte 2*SIZEOF_JSAMPROW ; input_data
|
||
|
|
add edi, byte 1*SIZEOF_JSAMPROW ; output_data
|
||
|
|
dec eax ; rowctr
|
||
|
|
jg near .rowloop
|
||
|
|
|
||
|
|
emms ; empty MMX state
|
||
|
|
|
||
|
|
.return:
|
||
|
|
pop edi
|
||
|
|
pop esi
|
||
|
|
; pop edx ; need not be preserved
|
||
|
|
; pop ecx ; need not be preserved
|
||
|
|
; pop ebx ; unused
|
||
|
|
pop ebp
|
||
|
|
ret
|
||
|
|
|
||
|
|
; For some reason, the OS X linker does not honor the request to align the
|
||
|
|
; segment unless we do this.
|
||
|
|
align 16
|