kc3-lang/libjpeg-turbo/jfdctint.asm
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Hash : a2e6a9dd
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Date : 2006-02-04T00:00:00
IJG R6b with x86SIMD V1.02 Independent JPEG Group's JPEG software release 6b with x86 SIMD extension for IJG JPEG library version 1.02
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jfdctint.asm
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; ; jfdctint.asm - accurate integer FDCT (non-SIMD) ; ; 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 ; ; This file contains a slow-but-accurate integer implementation of the ; forward DCT (Discrete Cosine Transform). The following code is based ; directly on the IJG's original jfdctint.c; see the jfdctint.c for ; more details. ; ; Last Modified : October 17, 2004 ; ; [TAB8] %include "jsimdext.inc" %include "jdct.inc" %ifdef DCT_ISLOW_SUPPORTED ; This module is specialized to the case DCTSIZE = 8. ; %if DCTSIZE != 8 %error "Sorry, this code only copes with 8x8 DCTs." %endif ; -------------------------------------------------------------------------- ; Descale and correctly round a DWORD value that's scaled by N bits. ; %macro descale 2 %if (%2)<=7 add %1, byte (1<<((%2)-1)) ; add reg32,imm8 %else add %1, (1<<((%2)-1)) ; add reg32,imm32 %endif sar %1,%2 %endmacro ; -------------------------------------------------------------------------- %define CONST_BITS 13 %define PASS1_BITS 2 %if CONST_BITS == 13 F_0_298 equ 2446 ; FIX(0.298631336) F_0_390 equ 3196 ; FIX(0.390180644) F_0_541 equ 4433 ; FIX(0.541196100) F_0_765 equ 6270 ; FIX(0.765366865) F_0_899 equ 7373 ; FIX(0.899976223) F_1_175 equ 9633 ; FIX(1.175875602) F_1_501 equ 12299 ; FIX(1.501321110) F_1_847 equ 15137 ; FIX(1.847759065) F_1_961 equ 16069 ; FIX(1.961570560) F_2_053 equ 16819 ; FIX(2.053119869) F_2_562 equ 20995 ; FIX(2.562915447) F_3_072 equ 25172 ; FIX(3.072711026) %else ; NASM cannot do compile-time arithmetic on floating-point constants. %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336) F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644) F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100) F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602) F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110) F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) %endif ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Perform the forward DCT on one block of samples. ; ; GLOBAL(void) ; jpeg_fdct_islow (DCTELEM * data) ; %define data(b) (b)+8 ; DCTELEM * data align 16 global EXTN(jpeg_fdct_islow) EXTN(jpeg_fdct_islow): push ebp mov ebp,esp push ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved push esi push edi ; ---- Pass 1: process rows. mov edx, POINTER [data(ebp)] ; (DCTELEM *) mov ecx, DCTSIZE alignx 16,7 .rowloop: movsx eax, DCTELEM [ROW(0,edx,SIZEOF_DCTELEM)] movsx edi, DCTELEM [ROW(7,edx,SIZEOF_DCTELEM)] lea esi,[eax+edi] ; esi=tmp0 sub eax,edi ; eax=tmp7 push ecx ; ctr push eax movsx ebx, DCTELEM [ROW(1,edx,SIZEOF_DCTELEM)] movsx ecx, DCTELEM [ROW(6,edx,SIZEOF_DCTELEM)] lea edi,[ebx+ecx] ; edi=tmp1 sub ebx,ecx ; ebx=tmp6 push ebx movsx eax, DCTELEM [ROW(2,edx,SIZEOF_DCTELEM)] movsx ecx, DCTELEM [ROW(5,edx,SIZEOF_DCTELEM)] lea ebx,[eax+ecx] ; ebx=tmp2 sub eax,ecx ; eax=tmp5 push edx ; dataptr push eax movsx ecx, DCTELEM [ROW(3,edx,SIZEOF_DCTELEM)] movsx eax, DCTELEM [ROW(4,edx,SIZEOF_DCTELEM)] lea edx,[ecx+eax] ; edx=tmp3 sub ecx,eax ; ecx=tmp4 push ecx ; -- Even part lea eax,[esi+edx] ; eax=tmp10 lea ecx,[edi+ebx] ; ecx=tmp11 sub esi,edx ; esi=tmp13 sub edi,ebx ; edi=tmp12 lea ebx,[eax+ecx] ; ebx=data0 sub eax,ecx ; eax=data4 mov edx, POINTER [esp+8] ; dataptr sal ebx, PASS1_BITS sal eax, PASS1_BITS mov DCTELEM [ROW(0,edx,SIZEOF_DCTELEM)], bx mov DCTELEM [ROW(4,edx,SIZEOF_DCTELEM)], ax lea ecx,[edi+esi] imul ecx,(F_0_541) ; ecx=z1 imul esi,(F_0_765) ; esi=MULTIPLY(tmp13,FIX_0_765366865) imul edi,(-F_1_847) ; edi=MULTIPLY(tmp12,-FIX_1_847759065) add esi,ecx ; esi=data2 add edi,ecx ; edi=data6 descale esi,(CONST_BITS-PASS1_BITS) descale edi,(CONST_BITS-PASS1_BITS) mov DCTELEM [ROW(2,edx,SIZEOF_DCTELEM)], si mov DCTELEM [ROW(6,edx,SIZEOF_DCTELEM)], di ; -- Odd part mov eax, INT32 [esp] ; eax=tmp4 mov ebx, INT32 [esp+4] ; ebx=tmp5 mov ecx, INT32 [esp+12] ; ecx=tmp6 mov esi, INT32 [esp+16] ; esi=tmp7 lea edx,[eax+ecx] ; edx=z3 lea edi,[ebx+esi] ; edi=z4 add eax,esi ; eax=z1 add ebx,ecx ; ebx=z2 lea esi,[edx+edi] imul esi,(F_1_175) ; esi=z5 imul edx,(-F_1_961) ; edx=z3(=MULTIPLY(z3,-FIX_1_961570560)) imul edi,(-F_0_390) ; edi=z4(=MULTIPLY(z4,-FIX_0_390180644)) imul eax,(-F_0_899) ; eax=z1(=MULTIPLY(z1,-FIX_0_899976223)) imul ebx,(-F_2_562) ; ebx=z2(=MULTIPLY(z2,-FIX_2_562915447)) add edx,esi ; edx=z3(=z3+z5) add edi,esi ; edi=z4(=z4+z5) lea ecx,[eax+edx] ; ecx=z1+z3 lea esi,[ebx+edi] ; esi=z2+z4 add eax,edi ; eax=z1+z4 add ebx,edx ; ebx=z2+z3 pop edx ; edx=tmp4 pop edi ; edi=tmp5 imul edx,(F_0_298) ; edx=tmp4(=MULTIPLY(tmp4,FIX_0_298631336)) imul edi,(F_2_053) ; edi=tmp5(=MULTIPLY(tmp5,FIX_2_053119869)) add ecx,edx ; ecx=data7(=tmp4+z1+z3) add esi,edi ; esi=data5(=tmp5+z2+z4) pop edx ; dataptr descale ecx,(CONST_BITS-PASS1_BITS) descale esi,(CONST_BITS-PASS1_BITS) mov DCTELEM [ROW(7,edx,SIZEOF_DCTELEM)], cx mov DCTELEM [ROW(5,edx,SIZEOF_DCTELEM)], si pop edi ; edi=tmp6 pop ecx ; ecx=tmp7 imul edi,(F_3_072) ; edi=tmp6(=MULTIPLY(tmp6,FIX_3_072711026)) imul ecx,(F_1_501) ; ecx=tmp7(=MULTIPLY(tmp7,FIX_1_501321110)) add ebx,edi ; ebx=data3(=tmp6+z2+z3) add eax,ecx ; eax=data1(=tmp7+z1+z4) pop ecx ; ctr descale ebx,(CONST_BITS-PASS1_BITS) descale eax,(CONST_BITS-PASS1_BITS) mov DCTELEM [ROW(3,edx,SIZEOF_DCTELEM)], bx mov DCTELEM [ROW(1,edx,SIZEOF_DCTELEM)], ax add edx, byte DCTSIZE*SIZEOF_DCTELEM dec ecx ; advance pointer to next row jnz near .rowloop ; ---- Pass 2: process columns. mov edx, POINTER [data(ebp)] ; (DCTELEM *) mov ecx, DCTSIZE alignx 16,7 .columnloop: movsx eax, DCTELEM [COL(0,edx,SIZEOF_DCTELEM)] movsx edi, DCTELEM [COL(7,edx,SIZEOF_DCTELEM)] lea esi,[eax+edi] ; esi=tmp0 sub eax,edi ; eax=tmp7 push ecx ; ctr push eax movsx ebx, DCTELEM [COL(1,edx,SIZEOF_DCTELEM)] movsx ecx, DCTELEM [COL(6,edx,SIZEOF_DCTELEM)] lea edi,[ebx+ecx] ; edi=tmp1 sub ebx,ecx ; ebx=tmp6 push ebx movsx eax, DCTELEM [COL(2,edx,SIZEOF_DCTELEM)] movsx ecx, DCTELEM [COL(5,edx,SIZEOF_DCTELEM)] lea ebx,[eax+ecx] ; ebx=tmp2 sub eax,ecx ; eax=tmp5 push edx ; dataptr push eax movsx ecx, DCTELEM [COL(3,edx,SIZEOF_DCTELEM)] movsx eax, DCTELEM [COL(4,edx,SIZEOF_DCTELEM)] lea edx,[ecx+eax] ; edx=tmp3 sub ecx,eax ; ecx=tmp4 push ecx ; -- Even part lea eax,[esi+edx] ; eax=tmp10 lea ecx,[edi+ebx] ; ecx=tmp11 sub esi,edx ; esi=tmp13 sub edi,ebx ; edi=tmp12 lea ebx,[eax+ecx] ; ebx=data0 sub eax,ecx ; eax=data4 mov edx, POINTER [esp+8] ; dataptr descale ebx, PASS1_BITS descale eax, PASS1_BITS mov DCTELEM [COL(0,edx,SIZEOF_DCTELEM)], bx mov DCTELEM [COL(4,edx,SIZEOF_DCTELEM)], ax lea ecx,[edi+esi] imul ecx,(F_0_541) ; ecx=z1 imul esi,(F_0_765) ; esi=MULTIPLY(tmp13,FIX_0_765366865) imul edi,(-F_1_847) ; edi=MULTIPLY(tmp12,-FIX_1_847759065) add esi,ecx ; esi=data2 add edi,ecx ; edi=data6 descale esi,(CONST_BITS+PASS1_BITS) descale edi,(CONST_BITS+PASS1_BITS) mov DCTELEM [COL(2,edx,SIZEOF_DCTELEM)], si mov DCTELEM [COL(6,edx,SIZEOF_DCTELEM)], di ; -- Odd part mov eax, INT32 [esp] ; eax=tmp4 mov ebx, INT32 [esp+4] ; ebx=tmp5 mov ecx, INT32 [esp+12] ; ecx=tmp6 mov esi, INT32 [esp+16] ; esi=tmp7 lea edx,[eax+ecx] ; edx=z3 lea edi,[ebx+esi] ; edi=z4 add eax,esi ; eax=z1 add ebx,ecx ; ebx=z2 lea esi,[edx+edi] imul esi,(F_1_175) ; esi=z5 imul edx,(-F_1_961) ; edx=z3(=MULTIPLY(z3,-FIX_1_961570560)) imul edi,(-F_0_390) ; edi=z4(=MULTIPLY(z4,-FIX_0_390180644)) imul eax,(-F_0_899) ; eax=z1(=MULTIPLY(z1,-FIX_0_899976223)) imul ebx,(-F_2_562) ; ebx=z2(=MULTIPLY(z2,-FIX_2_562915447)) add edx,esi ; edx=z3(=z3+z5) add edi,esi ; edi=z4(=z4+z5) lea ecx,[eax+edx] ; ecx=z1+z3 lea esi,[ebx+edi] ; esi=z2+z4 add eax,edi ; eax=z1+z4 add ebx,edx ; ebx=z2+z3 pop edx ; edx=tmp4 pop edi ; edi=tmp5 imul edx,(F_0_298) ; edx=tmp4(=MULTIPLY(tmp4,FIX_0_298631336)) imul edi,(F_2_053) ; edi=tmp5(=MULTIPLY(tmp5,FIX_2_053119869)) add ecx,edx ; ecx=data7(=tmp4+z1+z3) add esi,edi ; esi=data5(=tmp5+z2+z4) pop edx ; dataptr descale ecx,(CONST_BITS+PASS1_BITS) descale esi,(CONST_BITS+PASS1_BITS) mov DCTELEM [COL(7,edx,SIZEOF_DCTELEM)], cx mov DCTELEM [COL(5,edx,SIZEOF_DCTELEM)], si pop edi ; edi=tmp6 pop ecx ; ecx=tmp7 imul edi,(F_3_072) ; edi=tmp6(=MULTIPLY(tmp6,FIX_3_072711026)) imul ecx,(F_1_501) ; ecx=tmp7(=MULTIPLY(tmp7,FIX_1_501321110)) add ebx,edi ; ebx=data3(=tmp6+z2+z3) add eax,ecx ; eax=data1(=tmp7+z1+z4) pop ecx ; ctr descale ebx,(CONST_BITS+PASS1_BITS) descale eax,(CONST_BITS+PASS1_BITS) mov DCTELEM [COL(3,edx,SIZEOF_DCTELEM)], bx mov DCTELEM [COL(1,edx,SIZEOF_DCTELEM)], ax add edx, byte SIZEOF_DCTELEM ; advance pointer to next column dec ecx jnz near .columnloop pop edi pop esi ; pop edx ; need not be preserved ; pop ecx ; need not be preserved pop ebx pop ebp ret %endif ; DCT_ISLOW_SUPPORTED