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- ;
- ; jfdctflt.asm - floating-point FDCT (3DNow!)
- ;
- ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- ;
- ; Based on the 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
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