| ; |
| ; jfdctflt.asm - floating-point FDCT (3DNow!) |
| ; |
| ; 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 floating-point implementation of the forward DCT |
| ; (Discrete Cosine Transform). The following code is based directly on |
| ; the IJG's original jfdctflt.c; see the jfdctflt.c for more details. |
| ; |
| ; [TAB8] |
| |
| %include "jsimdext.inc" |
| %include "jdct.inc" |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| alignz 16 |
| global EXTN(jconst_fdct_float_3dnow) |
| |
| EXTN(jconst_fdct_float_3dnow): |
| |
| PD_0_382 times 2 dd 0.382683432365089771728460 |
| PD_0_707 times 2 dd 0.707106781186547524400844 |
| PD_0_541 times 2 dd 0.541196100146196984399723 |
| PD_1_306 times 2 dd 1.306562964876376527856643 |
| |
| alignz 16 |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 32 |
| ; |
| ; Perform the forward DCT on one block of samples. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_fdct_float_3dnow (FAST_FLOAT * data) |
| ; |
| |
| %define data(b) (b)+8 ; FAST_FLOAT * 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_float_3dnow) |
| |
| EXTN(jsimd_fdct_float_3dnow): |
| 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)] ; (FAST_FLOAT *) |
| mov ecx, DCTSIZE/2 |
| alignx 16,7 |
| .rowloop: |
| |
| movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm2, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)] |
| |
| ; mm0=(00 01), mm1=(10 11), mm2=(06 07), mm3=(16 17) |
| |
| movq mm4,mm0 ; transpose coefficients |
| punpckldq mm0,mm1 ; mm0=(00 10)=data0 |
| punpckhdq mm4,mm1 ; mm4=(01 11)=data1 |
| movq mm5,mm2 ; transpose coefficients |
| punpckldq mm2,mm3 ; mm2=(06 16)=data6 |
| punpckhdq mm5,mm3 ; mm5=(07 17)=data7 |
| |
| movq mm6,mm4 |
| movq mm7,mm0 |
| pfsub mm4,mm2 ; mm4=data1-data6=tmp6 |
| pfsub mm0,mm5 ; mm0=data0-data7=tmp7 |
| pfadd mm6,mm2 ; mm6=data1+data6=tmp1 |
| pfadd mm7,mm5 ; mm7=data0+data7=tmp0 |
| |
| movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)] |
| movq mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)] |
| movq mm5, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)] |
| |
| ; mm1=(02 03), mm3=(12 13), mm2=(04 05), mm5=(14 15) |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6 |
| movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7 |
| |
| movq mm4,mm1 ; transpose coefficients |
| punpckldq mm1,mm3 ; mm1=(02 12)=data2 |
| punpckhdq mm4,mm3 ; mm4=(03 13)=data3 |
| movq mm0,mm2 ; transpose coefficients |
| punpckldq mm2,mm5 ; mm2=(04 14)=data4 |
| punpckhdq mm0,mm5 ; mm0=(05 15)=data5 |
| |
| movq mm3,mm4 |
| movq mm5,mm1 |
| pfadd mm4,mm2 ; mm4=data3+data4=tmp3 |
| pfadd mm1,mm0 ; mm1=data2+data5=tmp2 |
| pfsub mm3,mm2 ; mm3=data3-data4=tmp4 |
| pfsub mm5,mm0 ; mm5=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movq mm2,mm7 |
| movq mm0,mm6 |
| pfsub mm7,mm4 ; mm7=tmp13 |
| pfsub mm6,mm1 ; mm6=tmp12 |
| pfadd mm2,mm4 ; mm2=tmp10 |
| pfadd mm0,mm1 ; mm0=tmp11 |
| |
| pfadd mm6,mm7 |
| pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1 |
| |
| movq mm4,mm2 |
| movq mm1,mm7 |
| pfsub mm2,mm0 ; mm2=data4 |
| pfsub mm7,mm6 ; mm7=data6 |
| pfadd mm4,mm0 ; mm4=data0 |
| pfadd mm1,mm6 ; mm1=data2 |
| |
| movq MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)], mm2 |
| movq MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)], mm7 |
| movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4 |
| movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)], mm1 |
| |
| ; -- Odd part |
| |
| movq mm0, MMWORD [wk(0)] ; mm0=tmp6 |
| movq mm6, MMWORD [wk(1)] ; mm6=tmp7 |
| |
| pfadd mm3,mm5 ; mm3=tmp10 |
| pfadd mm5,mm0 ; mm5=tmp11 |
| pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7 |
| |
| pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3 |
| |
| movq mm2,mm3 ; mm2=tmp10 |
| pfsub mm3,mm0 |
| pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5 |
| pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610) |
| pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296) |
| pfadd mm2,mm3 ; mm2=z2 |
| pfadd mm0,mm3 ; mm0=z4 |
| |
| movq mm7,mm6 |
| pfsub mm6,mm5 ; mm6=z13 |
| pfadd mm7,mm5 ; mm7=z11 |
| |
| movq mm4,mm6 |
| movq mm1,mm7 |
| pfsub mm6,mm2 ; mm6=data3 |
| pfsub mm7,mm0 ; mm7=data7 |
| pfadd mm4,mm2 ; mm4=data5 |
| pfadd mm1,mm0 ; mm1=data1 |
| |
| movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)], mm6 |
| movq MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)], mm7 |
| movq MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)], mm4 |
| movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1 |
| |
| add edx, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT |
| dec ecx |
| jnz near .rowloop |
| |
| ; ---- Pass 2: process columns. |
| |
| mov edx, POINTER [data(eax)] ; (FAST_FLOAT *) |
| mov ecx, DCTSIZE/2 |
| alignx 16,7 |
| .columnloop: |
| |
| movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)] |
| |
| ; mm0=(00 10), mm1=(01 11), mm2=(60 70), mm3=(61 71) |
| |
| movq mm4,mm0 ; transpose coefficients |
| punpckldq mm0,mm1 ; mm0=(00 01)=data0 |
| punpckhdq mm4,mm1 ; mm4=(10 11)=data1 |
| movq mm5,mm2 ; transpose coefficients |
| punpckldq mm2,mm3 ; mm2=(60 61)=data6 |
| punpckhdq mm5,mm3 ; mm5=(70 71)=data7 |
| |
| movq mm6,mm4 |
| movq mm7,mm0 |
| pfsub mm4,mm2 ; mm4=data1-data6=tmp6 |
| pfsub mm0,mm5 ; mm0=data0-data7=tmp7 |
| pfadd mm6,mm2 ; mm6=data1+data6=tmp1 |
| pfadd mm7,mm5 ; mm7=data0+data7=tmp0 |
| |
| movq mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)] |
| movq mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)] |
| |
| ; mm1=(20 30), mm3=(21 31), mm2=(40 50), mm5=(41 51) |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6 |
| movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7 |
| |
| movq mm4,mm1 ; transpose coefficients |
| punpckldq mm1,mm3 ; mm1=(20 21)=data2 |
| punpckhdq mm4,mm3 ; mm4=(30 31)=data3 |
| movq mm0,mm2 ; transpose coefficients |
| punpckldq mm2,mm5 ; mm2=(40 41)=data4 |
| punpckhdq mm0,mm5 ; mm0=(50 51)=data5 |
| |
| movq mm3,mm4 |
| movq mm5,mm1 |
| pfadd mm4,mm2 ; mm4=data3+data4=tmp3 |
| pfadd mm1,mm0 ; mm1=data2+data5=tmp2 |
| pfsub mm3,mm2 ; mm3=data3-data4=tmp4 |
| pfsub mm5,mm0 ; mm5=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movq mm2,mm7 |
| movq mm0,mm6 |
| pfsub mm7,mm4 ; mm7=tmp13 |
| pfsub mm6,mm1 ; mm6=tmp12 |
| pfadd mm2,mm4 ; mm2=tmp10 |
| pfadd mm0,mm1 ; mm0=tmp11 |
| |
| pfadd mm6,mm7 |
| pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1 |
| |
| movq mm4,mm2 |
| movq mm1,mm7 |
| pfsub mm2,mm0 ; mm2=data4 |
| pfsub mm7,mm6 ; mm7=data6 |
| pfadd mm4,mm0 ; mm4=data0 |
| pfadd mm1,mm6 ; mm1=data2 |
| |
| movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)], mm2 |
| movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)], mm7 |
| movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4 |
| movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)], mm1 |
| |
| ; -- Odd part |
| |
| movq mm0, MMWORD [wk(0)] ; mm0=tmp6 |
| movq mm6, MMWORD [wk(1)] ; mm6=tmp7 |
| |
| pfadd mm3,mm5 ; mm3=tmp10 |
| pfadd mm5,mm0 ; mm5=tmp11 |
| pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7 |
| |
| pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3 |
| |
| movq mm2,mm3 ; mm2=tmp10 |
| pfsub mm3,mm0 |
| pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5 |
| pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610) |
| pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296) |
| pfadd mm2,mm3 ; mm2=z2 |
| pfadd mm0,mm3 ; mm0=z4 |
| |
| movq mm7,mm6 |
| pfsub mm6,mm5 ; mm6=z13 |
| pfadd mm7,mm5 ; mm7=z11 |
| |
| movq mm4,mm6 |
| movq mm1,mm7 |
| pfsub mm6,mm2 ; mm6=data3 |
| pfsub mm7,mm0 ; mm7=data7 |
| pfadd mm4,mm2 ; mm4=data5 |
| pfadd mm1,mm0 ; mm1=data1 |
| |
| movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)], mm6 |
| movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)], mm7 |
| movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)], mm4 |
| movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1 |
| |
| add edx, byte 2*SIZEOF_FAST_FLOAT |
| dec ecx |
| jnz near .columnloop |
| |
| femms ; empty MMX/3DNow! 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 |
