зеркало из https://github.com/mozilla/gecko-dev.git
321 строка
12 KiB
NASM
321 строка
12 KiB
NASM
;
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; jfdctflt.asm - floating-point FDCT (3DNow!)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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;
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; Based on
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; x86 SIMD extension for IJG JPEG library
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; Copyright (C) 1999-2006, MIYASAKA Masaru.
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; For conditions of distribution and use, see copyright notice in jsimdext.inc
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;
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; This file should be assembled with NASM (Netwide Assembler),
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; can *not* be assembled with Microsoft's MASM or any compatible
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; assembler (including Borland's Turbo Assembler).
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; NASM is available from http://nasm.sourceforge.net/ or
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; http://sourceforge.net/project/showfiles.php?group_id=6208
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;
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; This file contains a floating-point implementation of the forward DCT
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; (Discrete Cosine Transform). The following code is based directly on
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; the IJG's original jfdctflt.c; see the jfdctflt.c for more details.
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;
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; [TAB8]
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%include "jsimdext.inc"
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%include "jdct.inc"
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; --------------------------------------------------------------------------
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SECTION SEG_CONST
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alignz 16
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global EXTN(jconst_fdct_float_3dnow)
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EXTN(jconst_fdct_float_3dnow):
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PD_0_382 times 2 dd 0.382683432365089771728460
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PD_0_707 times 2 dd 0.707106781186547524400844
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PD_0_541 times 2 dd 0.541196100146196984399723
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PD_1_306 times 2 dd 1.306562964876376527856643
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alignz 16
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 32
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;
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; Perform the forward DCT on one block of samples.
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;
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; GLOBAL(void)
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; jsimd_fdct_float_3dnow (FAST_FLOAT * data)
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;
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%define data(b) (b)+8 ; FAST_FLOAT * data
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%define original_ebp ebp+0
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%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
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%define WK_NUM 2
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align 16
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global EXTN(jsimd_fdct_float_3dnow)
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EXTN(jsimd_fdct_float_3dnow):
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push ebp
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mov eax,esp ; eax = original ebp
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sub esp, byte 4
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and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
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mov [esp],eax
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mov ebp,esp ; ebp = aligned ebp
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lea esp, [wk(0)]
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pushpic ebx
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; push ecx ; need not be preserved
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; push edx ; need not be preserved
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; push esi ; unused
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; push edi ; unused
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get_GOT ebx ; get GOT address
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; ---- Pass 1: process rows.
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mov edx, POINTER [data(eax)] ; (FAST_FLOAT *)
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mov ecx, DCTSIZE/2
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alignx 16,7
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.rowloop:
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movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)]
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; mm0=(00 01), mm1=(10 11), mm2=(06 07), mm3=(16 17)
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movq mm4,mm0 ; transpose coefficients
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punpckldq mm0,mm1 ; mm0=(00 10)=data0
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punpckhdq mm4,mm1 ; mm4=(01 11)=data1
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movq mm5,mm2 ; transpose coefficients
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punpckldq mm2,mm3 ; mm2=(06 16)=data6
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punpckhdq mm5,mm3 ; mm5=(07 17)=data7
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movq mm6,mm4
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movq mm7,mm0
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pfsub mm4,mm2 ; mm4=data1-data6=tmp6
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pfsub mm0,mm5 ; mm0=data0-data7=tmp7
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pfadd mm6,mm2 ; mm6=data1+data6=tmp1
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pfadd mm7,mm5 ; mm7=data0+data7=tmp0
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movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)]
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movq mm5, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)]
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; mm1=(02 03), mm3=(12 13), mm2=(04 05), mm5=(14 15)
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movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6
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movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7
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movq mm4,mm1 ; transpose coefficients
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punpckldq mm1,mm3 ; mm1=(02 12)=data2
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punpckhdq mm4,mm3 ; mm4=(03 13)=data3
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movq mm0,mm2 ; transpose coefficients
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punpckldq mm2,mm5 ; mm2=(04 14)=data4
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punpckhdq mm0,mm5 ; mm0=(05 15)=data5
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movq mm3,mm4
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movq mm5,mm1
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pfadd mm4,mm2 ; mm4=data3+data4=tmp3
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pfadd mm1,mm0 ; mm1=data2+data5=tmp2
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pfsub mm3,mm2 ; mm3=data3-data4=tmp4
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pfsub mm5,mm0 ; mm5=data2-data5=tmp5
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; -- Even part
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movq mm2,mm7
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movq mm0,mm6
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pfsub mm7,mm4 ; mm7=tmp13
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pfsub mm6,mm1 ; mm6=tmp12
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pfadd mm2,mm4 ; mm2=tmp10
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pfadd mm0,mm1 ; mm0=tmp11
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pfadd mm6,mm7
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pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1
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movq mm4,mm2
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movq mm1,mm7
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pfsub mm2,mm0 ; mm2=data4
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pfsub mm7,mm6 ; mm7=data6
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pfadd mm4,mm0 ; mm4=data0
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pfadd mm1,mm6 ; mm1=data2
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movq MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)], mm2
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movq MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)], mm7
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movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)], mm1
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; -- Odd part
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movq mm0, MMWORD [wk(0)] ; mm0=tmp6
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movq mm6, MMWORD [wk(1)] ; mm6=tmp7
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pfadd mm3,mm5 ; mm3=tmp10
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pfadd mm5,mm0 ; mm5=tmp11
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pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7
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pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3
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movq mm2,mm3 ; mm2=tmp10
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pfsub mm3,mm0
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pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5
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pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610)
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pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296)
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pfadd mm2,mm3 ; mm2=z2
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pfadd mm0,mm3 ; mm0=z4
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movq mm7,mm6
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pfsub mm6,mm5 ; mm6=z13
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pfadd mm7,mm5 ; mm7=z11
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movq mm4,mm6
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movq mm1,mm7
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pfsub mm6,mm2 ; mm6=data3
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pfsub mm7,mm0 ; mm7=data7
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pfadd mm4,mm2 ; mm4=data5
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pfadd mm1,mm0 ; mm1=data1
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movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)], mm6
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movq MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)], mm7
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movq MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1
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add edx, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
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dec ecx
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jnz near .rowloop
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; ---- Pass 2: process columns.
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mov edx, POINTER [data(eax)] ; (FAST_FLOAT *)
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mov ecx, DCTSIZE/2
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alignx 16,7
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.columnloop:
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movq mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm1, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)]
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; mm0=(00 10), mm1=(01 11), mm2=(60 70), mm3=(61 71)
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movq mm4,mm0 ; transpose coefficients
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punpckldq mm0,mm1 ; mm0=(00 01)=data0
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punpckhdq mm4,mm1 ; mm4=(10 11)=data1
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movq mm5,mm2 ; transpose coefficients
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punpckldq mm2,mm3 ; mm2=(60 61)=data6
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punpckhdq mm5,mm3 ; mm5=(70 71)=data7
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movq mm6,mm4
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movq mm7,mm0
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pfsub mm4,mm2 ; mm4=data1-data6=tmp6
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pfsub mm0,mm5 ; mm0=data0-data7=tmp7
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pfadd mm6,mm2 ; mm6=data1+data6=tmp1
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pfadd mm7,mm5 ; mm7=data0+data7=tmp0
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movq mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)]
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movq mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)]
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; mm1=(20 30), mm3=(21 31), mm2=(40 50), mm5=(41 51)
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movq MMWORD [wk(0)], mm4 ; wk(0)=tmp6
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movq MMWORD [wk(1)], mm0 ; wk(1)=tmp7
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movq mm4,mm1 ; transpose coefficients
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punpckldq mm1,mm3 ; mm1=(20 21)=data2
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punpckhdq mm4,mm3 ; mm4=(30 31)=data3
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movq mm0,mm2 ; transpose coefficients
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punpckldq mm2,mm5 ; mm2=(40 41)=data4
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punpckhdq mm0,mm5 ; mm0=(50 51)=data5
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movq mm3,mm4
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movq mm5,mm1
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pfadd mm4,mm2 ; mm4=data3+data4=tmp3
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pfadd mm1,mm0 ; mm1=data2+data5=tmp2
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pfsub mm3,mm2 ; mm3=data3-data4=tmp4
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pfsub mm5,mm0 ; mm5=data2-data5=tmp5
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; -- Even part
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movq mm2,mm7
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movq mm0,mm6
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pfsub mm7,mm4 ; mm7=tmp13
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pfsub mm6,mm1 ; mm6=tmp12
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pfadd mm2,mm4 ; mm2=tmp10
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pfadd mm0,mm1 ; mm0=tmp11
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pfadd mm6,mm7
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pfmul mm6,[GOTOFF(ebx,PD_0_707)] ; mm6=z1
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movq mm4,mm2
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movq mm1,mm7
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pfsub mm2,mm0 ; mm2=data4
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pfsub mm7,mm6 ; mm7=data6
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pfadd mm4,mm0 ; mm4=data0
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pfadd mm1,mm6 ; mm1=data2
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movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_FAST_FLOAT)], mm2
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movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_FAST_FLOAT)], mm7
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movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_FAST_FLOAT)], mm1
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; -- Odd part
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movq mm0, MMWORD [wk(0)] ; mm0=tmp6
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movq mm6, MMWORD [wk(1)] ; mm6=tmp7
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pfadd mm3,mm5 ; mm3=tmp10
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pfadd mm5,mm0 ; mm5=tmp11
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pfadd mm0,mm6 ; mm0=tmp12, mm6=tmp7
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pfmul mm5,[GOTOFF(ebx,PD_0_707)] ; mm5=z3
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movq mm2,mm3 ; mm2=tmp10
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pfsub mm3,mm0
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pfmul mm3,[GOTOFF(ebx,PD_0_382)] ; mm3=z5
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pfmul mm2,[GOTOFF(ebx,PD_0_541)] ; mm2=MULTIPLY(tmp10,FIX_0_54119610)
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pfmul mm0,[GOTOFF(ebx,PD_1_306)] ; mm0=MULTIPLY(tmp12,FIX_1_30656296)
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pfadd mm2,mm3 ; mm2=z2
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pfadd mm0,mm3 ; mm0=z4
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movq mm7,mm6
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pfsub mm6,mm5 ; mm6=z13
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pfadd mm7,mm5 ; mm7=z11
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movq mm4,mm6
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movq mm1,mm7
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pfsub mm6,mm2 ; mm6=data3
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pfsub mm7,mm0 ; mm7=data7
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pfadd mm4,mm2 ; mm4=data5
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pfadd mm1,mm0 ; mm1=data1
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movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_FAST_FLOAT)], mm6
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movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_FAST_FLOAT)], mm7
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movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_FAST_FLOAT)], mm4
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movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)], mm1
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add edx, byte 2*SIZEOF_FAST_FLOAT
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dec ecx
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jnz near .columnloop
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femms ; empty MMX/3DNow! state
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; pop edi ; unused
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; pop esi ; unused
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; pop edx ; need not be preserved
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; pop ecx ; need not be preserved
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poppic ebx
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mov esp,ebp ; esp <- aligned ebp
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pop esp ; esp <- original ebp
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pop ebp
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ret
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; For some reason, the OS X linker does not honor the request to align the
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; segment unless we do this.
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align 16
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