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+;
+; jf3dnflt.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
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