зеркало из https://github.com/mozilla/gecko-dev.git
172 строки
4.8 KiB
NASM
172 строки
4.8 KiB
NASM
;
|
|
; jcqnts2f.asm - sample data conversion and quantization (SSE & SSE2)
|
|
;
|
|
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
|
|
;
|
|
; Based on
|
|
; 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"
|
|
%include "jdct.inc"
|
|
|
|
; --------------------------------------------------------------------------
|
|
SECTION SEG_TEXT
|
|
BITS 32
|
|
;
|
|
; Load data into workspace, applying unsigned->signed conversion
|
|
;
|
|
; GLOBAL(void)
|
|
; jsimd_convsamp_float_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col,
|
|
; FAST_FLOAT * workspace);
|
|
;
|
|
|
|
%define sample_data ebp+8 ; JSAMPARRAY sample_data
|
|
%define start_col ebp+12 ; JDIMENSION start_col
|
|
%define workspace ebp+16 ; FAST_FLOAT * workspace
|
|
|
|
align 16
|
|
global EXTN(jsimd_convsamp_float_sse2)
|
|
|
|
EXTN(jsimd_convsamp_float_sse2):
|
|
push ebp
|
|
mov ebp,esp
|
|
push ebx
|
|
; push ecx ; need not be preserved
|
|
; push edx ; need not be preserved
|
|
push esi
|
|
push edi
|
|
|
|
pcmpeqw xmm7,xmm7
|
|
psllw xmm7,7
|
|
packsswb xmm7,xmm7 ; xmm7 = PB_CENTERJSAMPLE (0x808080..)
|
|
|
|
mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *)
|
|
mov eax, JDIMENSION [start_col]
|
|
mov edi, POINTER [workspace] ; (DCTELEM *)
|
|
mov ecx, DCTSIZE/2
|
|
alignx 16,7
|
|
.convloop:
|
|
mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
|
|
mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
|
|
|
|
movq xmm0, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE]
|
|
movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE]
|
|
|
|
psubb xmm0,xmm7 ; xmm0=(01234567)
|
|
psubb xmm1,xmm7 ; xmm1=(89ABCDEF)
|
|
|
|
punpcklbw xmm0,xmm0 ; xmm0=(*0*1*2*3*4*5*6*7)
|
|
punpcklbw xmm1,xmm1 ; xmm1=(*8*9*A*B*C*D*E*F)
|
|
|
|
punpcklwd xmm2,xmm0 ; xmm2=(***0***1***2***3)
|
|
punpckhwd xmm0,xmm0 ; xmm0=(***4***5***6***7)
|
|
punpcklwd xmm3,xmm1 ; xmm3=(***8***9***A***B)
|
|
punpckhwd xmm1,xmm1 ; xmm1=(***C***D***E***F)
|
|
|
|
psrad xmm2,(DWORD_BIT-BYTE_BIT) ; xmm2=(0123)
|
|
psrad xmm0,(DWORD_BIT-BYTE_BIT) ; xmm0=(4567)
|
|
cvtdq2ps xmm2,xmm2 ; xmm2=(0123)
|
|
cvtdq2ps xmm0,xmm0 ; xmm0=(4567)
|
|
psrad xmm3,(DWORD_BIT-BYTE_BIT) ; xmm3=(89AB)
|
|
psrad xmm1,(DWORD_BIT-BYTE_BIT) ; xmm1=(CDEF)
|
|
cvtdq2ps xmm3,xmm3 ; xmm3=(89AB)
|
|
cvtdq2ps xmm1,xmm1 ; xmm1=(CDEF)
|
|
|
|
movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm2
|
|
movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
|
|
movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
|
|
movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
|
|
|
|
add esi, byte 2*SIZEOF_JSAMPROW
|
|
add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
|
|
dec ecx
|
|
jnz short .convloop
|
|
|
|
pop edi
|
|
pop esi
|
|
; pop edx ; need not be preserved
|
|
; pop ecx ; need not be preserved
|
|
pop ebx
|
|
pop ebp
|
|
ret
|
|
|
|
|
|
; --------------------------------------------------------------------------
|
|
;
|
|
; Quantize/descale the coefficients, and store into coef_block
|
|
;
|
|
; GLOBAL(void)
|
|
; jsimd_quantize_float_sse2 (JCOEFPTR coef_block, FAST_FLOAT * divisors,
|
|
; FAST_FLOAT * workspace);
|
|
;
|
|
|
|
%define coef_block ebp+8 ; JCOEFPTR coef_block
|
|
%define divisors ebp+12 ; FAST_FLOAT * divisors
|
|
%define workspace ebp+16 ; FAST_FLOAT * workspace
|
|
|
|
align 16
|
|
global EXTN(jsimd_quantize_float_sse2)
|
|
|
|
EXTN(jsimd_quantize_float_sse2):
|
|
push ebp
|
|
mov ebp,esp
|
|
; push ebx ; unused
|
|
; push ecx ; unused
|
|
; push edx ; need not be preserved
|
|
push esi
|
|
push edi
|
|
|
|
mov esi, POINTER [workspace]
|
|
mov edx, POINTER [divisors]
|
|
mov edi, JCOEFPTR [coef_block]
|
|
mov eax, DCTSIZE2/16
|
|
alignx 16,7
|
|
.quantloop:
|
|
movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
|
|
movaps xmm1, XMMWORD [XMMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)]
|
|
mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
|
|
mulps xmm1, XMMWORD [XMMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
|
|
movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
|
|
movaps xmm3, XMMWORD [XMMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)]
|
|
mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
|
|
mulps xmm3, XMMWORD [XMMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
|
|
|
|
cvtps2dq xmm0,xmm0
|
|
cvtps2dq xmm1,xmm1
|
|
cvtps2dq xmm2,xmm2
|
|
cvtps2dq xmm3,xmm3
|
|
|
|
packssdw xmm0,xmm1
|
|
packssdw xmm2,xmm3
|
|
|
|
movdqa XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_JCOEF)], xmm0
|
|
movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_JCOEF)], xmm2
|
|
|
|
add esi, byte 16*SIZEOF_FAST_FLOAT
|
|
add edx, byte 16*SIZEOF_FAST_FLOAT
|
|
add edi, byte 16*SIZEOF_JCOEF
|
|
dec eax
|
|
jnz short .quantloop
|
|
|
|
pop edi
|
|
pop esi
|
|
; pop edx ; need not be preserved
|
|
; pop ecx ; unused
|
|
; 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
|