; ; jfmmxfst.asm - fast integer FDCT (MMX) ; ; 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 ; ; This file contains a fast, not so accurate integer implementation of ; the forward DCT (Discrete Cosine Transform). The following code is ; based directly on the IJG's original jfdctfst.c; see the jfdctfst.c ; for more details. ; ; [TAB8] %include "jsimdext.inc" %include "jdct.inc" ; -------------------------------------------------------------------------- %define CONST_BITS 8 ; 14 is also OK. %if CONST_BITS == 8 F_0_382 equ 98 ; FIX(0.382683433) F_0_541 equ 139 ; FIX(0.541196100) F_0_707 equ 181 ; FIX(0.707106781) F_1_306 equ 334 ; FIX(1.306562965) %else ; NASM cannot do compile-time arithmetic on floating-point constants. %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) F_0_382 equ DESCALE( 410903207,30-CONST_BITS) ; FIX(0.382683433) F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100) F_0_707 equ DESCALE( 759250124,30-CONST_BITS) ; FIX(0.707106781) F_1_306 equ DESCALE(1402911301,30-CONST_BITS) ; FIX(1.306562965) %endif ; -------------------------------------------------------------------------- SECTION SEG_CONST ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow) ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw) %define PRE_MULTIPLY_SCALE_BITS 2 %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS) alignz 16 global EXTN(jconst_fdct_ifast_mmx) PRIVATE EXTN(jconst_fdct_ifast_mmx): PW_F0707 times 4 dw F_0_707 << CONST_SHIFT PW_F0382 times 4 dw F_0_382 << CONST_SHIFT PW_F0541 times 4 dw F_0_541 << CONST_SHIFT PW_F1306 times 4 dw F_1_306 << CONST_SHIFT alignz 16 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Perform the forward DCT on one block of samples. ; ; GLOBAL(void) ; jsimd_fdct_ifast_mmx (DCTELEM * data) ; %define data(b) (b)+8 ; DCTELEM * data %define original_ebp ebp+0 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM] %define WK_NUM 2 align 16 global EXTN(jsimd_fdct_ifast_mmx) PRIVATE EXTN(jsimd_fdct_ifast_mmx): push ebp mov eax,esp ; eax = original ebp sub esp, byte 4 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits mov [esp],eax mov ebp,esp ; ebp = aligned ebp lea esp, [wk(0)] pushpic ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved ; push esi ; unused ; push edi ; unused get_GOT ebx ; get GOT address ; ---- Pass 1: process rows. mov edx, POINTER [data(eax)] ; (DCTELEM *) mov ecx, DCTSIZE/4 alignx 16,7 .rowloop: movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)] movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)] ; mm0=(20 21 22 23), mm2=(24 25 26 27) ; mm1=(30 31 32 33), mm3=(34 35 36 37) movq mm4,mm0 ; transpose coefficients(phase 1) punpcklwd mm0,mm1 ; mm0=(20 30 21 31) punpckhwd mm4,mm1 ; mm4=(22 32 23 33) movq mm5,mm2 ; transpose coefficients(phase 1) punpcklwd mm2,mm3 ; mm2=(24 34 25 35) punpckhwd mm5,mm3 ; mm5=(26 36 27 37) movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)] movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)] ; mm6=(00 01 02 03), mm1=(04 05 06 07) ; mm7=(10 11 12 13), mm3=(14 15 16 17) movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33) movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35) movq mm4,mm6 ; transpose coefficients(phase 1) punpcklwd mm6,mm7 ; mm6=(00 10 01 11) punpckhwd mm4,mm7 ; mm4=(02 12 03 13) movq mm2,mm1 ; transpose coefficients(phase 1) punpcklwd mm1,mm3 ; mm1=(04 14 05 15) punpckhwd mm2,mm3 ; mm2=(06 16 07 17) movq mm7,mm6 ; transpose coefficients(phase 2) punpckldq mm6,mm0 ; mm6=(00 10 20 30)=data0 punpckhdq mm7,mm0 ; mm7=(01 11 21 31)=data1 movq mm3,mm2 ; transpose coefficients(phase 2) punpckldq mm2,mm5 ; mm2=(06 16 26 36)=data6 punpckhdq mm3,mm5 ; mm3=(07 17 27 37)=data7 movq mm0,mm7 movq mm5,mm6 psubw mm7,mm2 ; mm7=data1-data6=tmp6 psubw mm6,mm3 ; mm6=data0-data7=tmp7 paddw mm0,mm2 ; mm0=data1+data6=tmp1 paddw mm5,mm3 ; mm5=data0+data7=tmp0 movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33) movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35) movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 movq mm7,mm4 ; transpose coefficients(phase 2) punpckldq mm4,mm2 ; mm4=(02 12 22 32)=data2 punpckhdq mm7,mm2 ; mm7=(03 13 23 33)=data3 movq mm6,mm1 ; transpose coefficients(phase 2) punpckldq mm1,mm3 ; mm1=(04 14 24 34)=data4 punpckhdq mm6,mm3 ; mm6=(05 15 25 35)=data5 movq mm2,mm7 movq mm3,mm4 paddw mm7,mm1 ; mm7=data3+data4=tmp3 paddw mm4,mm6 ; mm4=data2+data5=tmp2 psubw mm2,mm1 ; mm2=data3-data4=tmp4 psubw mm3,mm6 ; mm3=data2-data5=tmp5 ; -- Even part movq mm1,mm5 movq mm6,mm0 psubw mm5,mm7 ; mm5=tmp13 psubw mm0,mm4 ; mm0=tmp12 paddw mm1,mm7 ; mm1=tmp10 paddw mm6,mm4 ; mm6=tmp11 paddw mm0,mm5 psllw mm0,PRE_MULTIPLY_SCALE_BITS pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1 movq mm7,mm1 movq mm4,mm5 psubw mm1,mm6 ; mm1=data4 psubw mm5,mm0 ; mm5=data6 paddw mm7,mm6 ; mm7=data0 paddw mm4,mm0 ; mm4=data2 movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm1 movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm5 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 ; -- Odd part movq mm6, MMWORD [wk(0)] ; mm6=tmp6 movq mm0, MMWORD [wk(1)] ; mm0=tmp7 paddw mm2,mm3 ; mm2=tmp10 paddw mm3,mm6 ; mm3=tmp11 paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7 psllw mm2,PRE_MULTIPLY_SCALE_BITS psllw mm6,PRE_MULTIPLY_SCALE_BITS psllw mm3,PRE_MULTIPLY_SCALE_BITS pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3 movq mm1,mm2 ; mm1=tmp10 psubw mm2,mm6 pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5 pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610) pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296) paddw mm1,mm2 ; mm1=z2 paddw mm6,mm2 ; mm6=z4 movq mm5,mm0 psubw mm0,mm3 ; mm0=z13 paddw mm5,mm3 ; mm5=z11 movq mm7,mm0 movq mm4,mm5 psubw mm0,mm1 ; mm0=data3 psubw mm5,mm6 ; mm5=data7 paddw mm7,mm1 ; mm7=data5 paddw mm4,mm6 ; mm4=data1 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0 movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm5 movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm7 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4 add edx, byte 4*DCTSIZE*SIZEOF_DCTELEM dec ecx jnz near .rowloop ; ---- Pass 2: process columns. mov edx, POINTER [data(eax)] ; (DCTELEM *) mov ecx, DCTSIZE/4 alignx 16,7 .columnloop: movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)] movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)] ; mm0=(02 12 22 32), mm2=(42 52 62 72) ; mm1=(03 13 23 33), mm3=(43 53 63 73) movq mm4,mm0 ; transpose coefficients(phase 1) punpcklwd mm0,mm1 ; mm0=(02 03 12 13) punpckhwd mm4,mm1 ; mm4=(22 23 32 33) movq mm5,mm2 ; transpose coefficients(phase 1) punpcklwd mm2,mm3 ; mm2=(42 43 52 53) punpckhwd mm5,mm3 ; mm5=(62 63 72 73) movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)] movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)] ; mm6=(00 10 20 30), mm1=(40 50 60 70) ; mm7=(01 11 21 31), mm3=(41 51 61 71) movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33) movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53) movq mm4,mm6 ; transpose coefficients(phase 1) punpcklwd mm6,mm7 ; mm6=(00 01 10 11) punpckhwd mm4,mm7 ; mm4=(20 21 30 31) movq mm2,mm1 ; transpose coefficients(phase 1) punpcklwd mm1,mm3 ; mm1=(40 41 50 51) punpckhwd mm2,mm3 ; mm2=(60 61 70 71) movq mm7,mm6 ; transpose coefficients(phase 2) punpckldq mm6,mm0 ; mm6=(00 01 02 03)=data0 punpckhdq mm7,mm0 ; mm7=(10 11 12 13)=data1 movq mm3,mm2 ; transpose coefficients(phase 2) punpckldq mm2,mm5 ; mm2=(60 61 62 63)=data6 punpckhdq mm3,mm5 ; mm3=(70 71 72 73)=data7 movq mm0,mm7 movq mm5,mm6 psubw mm7,mm2 ; mm7=data1-data6=tmp6 psubw mm6,mm3 ; mm6=data0-data7=tmp7 paddw mm0,mm2 ; mm0=data1+data6=tmp1 paddw mm5,mm3 ; mm5=data0+data7=tmp0 movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33) movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53) movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 movq mm7,mm4 ; transpose coefficients(phase 2) punpckldq mm4,mm2 ; mm4=(20 21 22 23)=data2 punpckhdq mm7,mm2 ; mm7=(30 31 32 33)=data3 movq mm6,mm1 ; transpose coefficients(phase 2) punpckldq mm1,mm3 ; mm1=(40 41 42 43)=data4 punpckhdq mm6,mm3 ; mm6=(50 51 52 53)=data5 movq mm2,mm7 movq mm3,mm4 paddw mm7,mm1 ; mm7=data3+data4=tmp3 paddw mm4,mm6 ; mm4=data2+data5=tmp2 psubw mm2,mm1 ; mm2=data3-data4=tmp4 psubw mm3,mm6 ; mm3=data2-data5=tmp5 ; -- Even part movq mm1,mm5 movq mm6,mm0 psubw mm5,mm7 ; mm5=tmp13 psubw mm0,mm4 ; mm0=tmp12 paddw mm1,mm7 ; mm1=tmp10 paddw mm6,mm4 ; mm6=tmp11 paddw mm0,mm5 psllw mm0,PRE_MULTIPLY_SCALE_BITS pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1 movq mm7,mm1 movq mm4,mm5 psubw mm1,mm6 ; mm1=data4 psubw mm5,mm0 ; mm5=data6 paddw mm7,mm6 ; mm7=data0 paddw mm4,mm0 ; mm4=data2 movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm1 movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm5 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 ; -- Odd part movq mm6, MMWORD [wk(0)] ; mm6=tmp6 movq mm0, MMWORD [wk(1)] ; mm0=tmp7 paddw mm2,mm3 ; mm2=tmp10 paddw mm3,mm6 ; mm3=tmp11 paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7 psllw mm2,PRE_MULTIPLY_SCALE_BITS psllw mm6,PRE_MULTIPLY_SCALE_BITS psllw mm3,PRE_MULTIPLY_SCALE_BITS pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3 movq mm1,mm2 ; mm1=tmp10 psubw mm2,mm6 pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5 pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610) pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296) paddw mm1,mm2 ; mm1=z2 paddw mm6,mm2 ; mm6=z4 movq mm5,mm0 psubw mm0,mm3 ; mm0=z13 paddw mm5,mm3 ; mm5=z11 movq mm7,mm0 movq mm4,mm5 psubw mm0,mm1 ; mm0=data3 psubw mm5,mm6 ; mm5=data7 paddw mm7,mm1 ; mm7=data5 paddw mm4,mm6 ; mm4=data1 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0 movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm5 movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm7 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4 add edx, byte 4*SIZEOF_DCTELEM dec ecx jnz near .columnloop emms ; empty MMX state ; pop edi ; unused ; pop esi ; unused ; pop edx ; need not be preserved ; pop ecx ; need not be preserved poppic ebx mov esp,ebp ; esp <- aligned ebp pop esp ; esp <- original ebp 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