text: ;
  ; jidctflt.asm - floating-point IDCT (SSE & MMX)
  ;
  ; 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 inverse DCT
  ; (Discrete Cosine Transform). The following code is based directly on
  ; the IJG's original jidctflt.c; see the jidctflt.c for more details.
  ;
  ; [TAB8]
  
  %include "jsimdext.inc"
  %include "jdct.inc"
  
  ; --------------------------------------------------------------------------
  
  %macro  unpcklps2 2     ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
          shufps  %1,%2,0x44
  %endmacro
  
  %macro  unpckhps2 2     ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
          shufps  %1,%2,0xEE
  %endmacro
  
  ; --------------------------------------------------------------------------
          SECTION SEG_CONST
  
          alignz  16
          global  EXTN(jconst_idct_float_sse)
  
  EXTN(jconst_idct_float_sse):
  
  PD_1_414        times 4 dd  1.414213562373095048801689
  PD_1_847        times 4 dd  1.847759065022573512256366
  PD_1_082        times 4 dd  1.082392200292393968799446
  PD_M2_613       times 4 dd -2.613125929752753055713286
  PD_0_125        times 4 dd  0.125       ; 1/8
  PB_CENTERJSAMP  times 8 db  CENTERJSAMPLE
  
          alignz  16
  
  ; --------------------------------------------------------------------------
          SECTION SEG_TEXT
          BITS    32
  ;
  ; Perform dequantization and inverse DCT on one block of coefficients.
  ;
  ; GLOBAL(void)
  ; jsimd_idct_float_sse (void *dct_table, JCOEFPTR coef_block,
  ;                       JSAMPARRAY output_buf, JDIMENSION output_col)
  ;
  
  %define dct_table(b)    (b)+8           ; void *dct_table
  %define coef_block(b)   (b)+12          ; JCOEFPTR coef_block
  %define output_buf(b)   (b)+16          ; JSAMPARRAY output_buf
  %define output_col(b)   (b)+20          ; JDIMENSION output_col
  
  %define original_ebp    ebp+0
  %define wk(i)           ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
  %define WK_NUM          2
  %define workspace       wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
                                          ; FAST_FLOAT workspace[DCTSIZE2]
  
          align   16
          global  EXTN(jsimd_idct_float_sse)
  
  EXTN(jsimd_idct_float_sse):
          push    ebp
          mov     eax,esp                         ; eax = original ebp
          sub     esp, byte 4
          and     esp, byte (-SIZEOF_XMMWORD)     ; align to 128 bits
          mov     [esp],eax
          mov     ebp,esp                         ; ebp = aligned ebp
          lea     esp, [workspace]
          push    ebx
  ;       push    ecx             ; need not be preserved
  ;       push    edx             ; need not be preserved
          push    esi
          push    edi
  
          get_GOT ebx             ; get GOT address
  
          ; ---- Pass 1: process columns from input, store into work array.
  
  ;       mov     eax, [original_ebp]
          mov     edx, POINTER [dct_table(eax)]           ; quantptr
          mov     esi, JCOEFPTR [coef_block(eax)]         ; inptr
          lea     edi, [workspace]                        ; FAST_FLOAT *wsptr
          mov     ecx, DCTSIZE/4                          ; ctr
          alignx  16,7
  .columnloop:
  %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
          mov     eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
          or      eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
          jnz     near .columnDCT
  
          movq    mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
          movq    mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
          por     mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
          por     mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
          por     mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
          por     mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
          por     mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
          por     mm1,mm0
          packsswb mm1,mm1
          movd    eax,mm1
          test    eax,eax
          jnz     short .columnDCT
  
          ; -- AC terms all zero
  
          movq      mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
  
          punpckhwd mm1,mm0                       ; mm1=(** 02 ** 03)
          punpcklwd mm0,mm0                       ; mm0=(00 00 01 01)
          psrad     mm1,(DWORD_BIT-WORD_BIT)      ; mm1=in0H=(02 03)
          psrad     mm0,(DWORD_BIT-WORD_BIT)      ; mm0=in0L=(00 01)
          cvtpi2ps  xmm3,mm1                      ; xmm3=(02 03 ** **)
          cvtpi2ps  xmm0,mm0                      ; xmm0=(00 01 ** **)
          movlhps   xmm0,xmm3                     ; xmm0=in0=(00 01 02 03)
  
          mulps   xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
  
          movaps  xmm1,xmm0
          movaps  xmm2,xmm0
          movaps  xmm3,xmm0
  
          shufps  xmm0,xmm0,0x00                  ; xmm0=(00 00 00 00)
          shufps  xmm1,xmm1,0x55                  ; xmm1=(01 01 01 01)
          shufps  xmm2,xmm2,0xAA                  ; xmm2=(02 02 02 02)
          shufps  xmm3,xmm3,0xFF                  ; xmm3=(03 03 03 03)
  
          movaps  XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
          movaps  XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
          movaps  XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
          movaps  XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
          movaps  XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
          movaps  XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
          movaps  XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
          movaps  XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
          jmp     near .nextcolumn
          alignx  16,7
  %endif
  .columnDCT:
  
          ; -- Even part
  
          movq      mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
          movq      mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
          movq      mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
          movq      mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
  
          punpckhwd mm4,mm0                       ; mm4=(** 02 ** 03)
          punpcklwd mm0,mm0                       ; mm0=(00 00 01 01)
          punpckhwd mm5,mm1                       ; mm5=(** 22 ** 23)
          punpcklwd mm1,mm1                       ; mm1=(20 20 21 21)
  
          psrad     mm4,(DWORD_BIT-WORD_BIT)      ; mm4=in0H=(02 03)
          psrad     mm0,(DWORD_BIT-WORD_BIT)      ; mm0=in0L=(00 01)
          cvtpi2ps  xmm4,mm4                      ; xmm4=(02 03 ** **)
          cvtpi2ps  xmm0,mm0                      ; xmm0=(00 01 ** **)
          psrad     mm5,(DWORD_BIT-WORD_BIT)      ; mm5=in2H=(22 23)
          psrad     mm1,(DWORD_BIT-WORD_BIT)      ; mm1=in2L=(20 21)
          cvtpi2ps  xmm5,mm5                      ; xmm5=(22 23 ** **)
          cvtpi2ps  xmm1,mm1                      ; xmm1=(20 21 ** **)
  
          punpckhwd mm6,mm2                       ; mm6=(** 42 ** 43)
          punpcklwd mm2,mm2                       ; mm2=(40 40 41 41)
          punpckhwd mm7,mm3                       ; mm7=(** 62 ** 63)
          punpcklwd mm3,mm3                       ; mm3=(60 60 61 61)
  
          psrad     mm6,(DWORD_BIT-WORD_BIT)      ; mm6=in4H=(42 43)
          psrad     mm2,(DWORD_BIT-WORD_BIT)      ; mm2=in4L=(40 41)
          cvtpi2ps  xmm6,mm6                      ; xmm6=(42 43 ** **)
          cvtpi2ps  xmm2,mm2                      ; xmm2=(40 41 ** **)
          psrad     mm7,(DWORD_BIT-WORD_BIT)      ; mm7=in6H=(62 63)
          psrad     mm3,(DWORD_BIT-WORD_BIT)      ; mm3=in6L=(60 61)
          cvtpi2ps  xmm7,mm7                      ; xmm7=(62 63 ** **)
          cvtpi2ps  xmm3,mm3                      ; xmm3=(60 61 ** **)
  
          movlhps   xmm0,xmm4                     ; xmm0=in0=(00 01 02 03)
          movlhps   xmm1,xmm5                     ; xmm1=in2=(20 21 22 23)
          mulps     xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
          mulps     xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
  
          movlhps   xmm2,xmm6                     ; xmm2=in4=(40 41 42 43)
          movlhps   xmm3,xmm7                     ; xmm3=in6=(60 61 62 63)
          mulps     xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
          mulps     xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
  
          movaps  xmm4,xmm0
          movaps  xmm5,xmm1
          subps   xmm0,xmm2               ; xmm0=tmp11
          subps   xmm1,xmm3
          addps   xmm4,xmm2               ; xmm4=tmp10
          addps   xmm5,xmm3               ; xmm5=tmp13
  
          mulps   xmm1,[GOTOFF(ebx,PD_1_414)]
          subps   xmm1,xmm5               ; xmm1=tmp12
  
          movaps  xmm6,xmm4
          movaps  xmm7,xmm0
          subps   xmm4,xmm5               ; xmm4=tmp3
          subps   xmm0,xmm1               ; xmm0=tmp2
          addps   xmm6,xmm5               ; xmm6=tmp0
          addps   xmm7,xmm1               ; xmm7=tmp1
  
          movaps  XMMWORD [wk(1)], xmm4   ; tmp3
          movaps  XMMWORD [wk(0)], xmm0   ; tmp2
  
          ; -- Odd part
  
          movq      mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
          movq      mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
          movq      mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
          movq      mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
  
          punpckhwd mm6,mm4                       ; mm6=(** 12 ** 13)
          punpcklwd mm4,mm4                       ; mm4=(10 10 11 11)
          punpckhwd mm2,mm0                       ; mm2=(** 32 ** 33)
          punpcklwd mm0,mm0                       ; mm0=(30 30 31 31)
  
          psrad     mm6,(DWORD_BIT-WORD_BIT)      ; mm6=in1H=(12 13)
          psrad     mm4,(DWORD_BIT-WORD_BIT)      ; mm4=in1L=(10 11)
          cvtpi2ps  xmm4,mm6                      ; xmm4=(12 13 ** **)
          cvtpi2ps  xmm2,mm4                      ; xmm2=(10 11 ** **)
          psrad     mm2,(DWORD_BIT-WORD_BIT)      ; mm2=in3H=(32 33)
          psrad     mm0,(DWORD_BIT-WORD_BIT)      ; mm0=in3L=(30 31)
          cvtpi2ps  xmm0,mm2                      ; xmm0=(32 33 ** **)
          cvtpi2ps  xmm3,mm0                      ; xmm3=(30 31 ** **)
  
          punpckhwd mm7,mm5                       ; mm7=(** 52 ** 53)
          punpcklwd mm5,mm5                       ; mm5=(50 50 51 51)
          punpckhwd mm3,mm1                       ; mm3=(** 72 ** 73)
          punpcklwd mm1,mm1                       ; mm1=(70 70 71 71)
  
          movlhps   xmm2,xmm4                     ; xmm2=in1=(10 11 12 13)
          movlhps   xmm3,xmm0                     ; xmm3=in3=(30 31 32 33)
  
          psrad     mm7,(DWORD_BIT-WORD_BIT)      ; mm7=in5H=(52 53)
          psrad     mm5,(DWORD_BIT-WORD_BIT)      ; mm5=in5L=(50 51)
          cvtpi2ps  xmm4,mm7                      ; xmm4=(52 53 ** **)
          cvtpi2ps  xmm5,mm5                      ; xmm5=(50 51 ** **)
          psrad     mm3,(DWORD_BIT-WORD_BIT)      ; mm3=in7H=(72 73)
          psrad     mm1,(DWORD_BIT-WORD_BIT)      ; mm1=in7L=(70 71)
          cvtpi2ps  xmm0,mm3                      ; xmm0=(72 73 ** **)
          cvtpi2ps  xmm1,mm1                      ; xmm1=(70 71 ** **)
  
          mulps     xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
          mulps     xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
  
          movlhps   xmm5,xmm4                     ; xmm5=in5=(50 51 52 53)
          movlhps   xmm1,xmm0                     ; xmm1=in7=(70 71 72 73)
          mulps     xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
          mulps     xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
  
          movaps  xmm4,xmm2
          movaps  xmm0,xmm5
          addps   xmm2,xmm1               ; xmm2=z11
          addps   xmm5,xmm3               ; xmm5=z13
          subps   xmm4,xmm1               ; xmm4=z12
          subps   xmm0,xmm3               ; xmm0=z10
  
          movaps  xmm1,xmm2
          subps   xmm2,xmm5
          addps   xmm1,xmm5               ; xmm1=tmp7
  
          mulps   xmm2,[GOTOFF(ebx,PD_1_414)]     ; xmm2=tmp11
  
          movaps  xmm3,xmm0
          addps   xmm0,xmm4
          mulps   xmm0,[GOTOFF(ebx,PD_1_847)]     ; xmm0=z5
          mulps   xmm3,[GOTOFF(ebx,PD_M2_613)]    ; xmm3=(z10 * -2.613125930)
          mulps   xmm4,[GOTOFF(ebx,PD_1_082)]     ; xmm4=(z12 * 1.082392200)
          addps   xmm3,xmm0               ; xmm3=tmp12
          subps   xmm4,xmm0               ; xmm4=tmp10
  
          ; -- Final output stage
  
          subps   xmm3,xmm1               ; xmm3=tmp6
          movaps  xmm5,xmm6
          movaps  xmm0,xmm7
          addps   xmm6,xmm1               ; xmm6=data0=(00 01 02 03)
          addps   xmm7,xmm3               ; xmm7=data1=(10 11 12 13)
          subps   xmm5,xmm1               ; xmm5=data7=(70 71 72 73)
          subps   xmm0,xmm3               ; xmm0=data6=(60 61 62 63)
          subps   xmm2,xmm3               ; xmm2=tmp5
  
          movaps    xmm1,xmm6             ; transpose coefficients(phase 1)
          unpcklps  xmm6,xmm7             ; xmm6=(00 10 01 11)
          unpckhps  xmm1,xmm7             ; xmm1=(02 12 03 13)
          movaps    xmm3,xmm0             ; transpose coefficients(phase 1)
          unpcklps  xmm0,xmm5             ; xmm0=(60 70 61 71)
          unpckhps  xmm3,xmm5             ; xmm3=(62 72 63 73)
  
          movaps  xmm7, XMMWORD [wk(0)]   ; xmm7=tmp2
          movaps  xmm5, XMMWORD [wk(1)]   ; xmm5=tmp3
  
          movaps  XMMWORD [wk(0)], xmm0   ; wk(0)=(60 70 61 71)
          movaps  XMMWORD [wk(1)], xmm3   ; wk(1)=(62 72 63 73)
  
          addps   xmm4,xmm2               ; xmm4=tmp4
          movaps  xmm0,xmm7
          movaps  xmm3,xmm5
          addps   xmm7,xmm2               ; xmm7=data2=(20 21 22 23)
          addps   xmm5,xmm4               ; xmm5=data4=(40 41 42 43)
          subps   xmm0,xmm2               ; xmm0=data5=(50 51 52 53)
          subps   xmm3,xmm4               ; xmm3=data3=(30 31 32 33)
  
          movaps    xmm2,xmm7             ; transpose coefficients(phase 1)
          unpcklps  xmm7,xmm3             ; xmm7=(20 30 21 31)
          unpckhps  xmm2,xmm3             ; xmm2=(22 32 23 33)
          movaps    xmm4,xmm5             ; transpose coefficients(phase 1)
          unpcklps  xmm5,xmm0             ; xmm5=(40 50 41 51)
          unpckhps  xmm4,xmm0             ; xmm4=(42 52 43 53)
  
          movaps    xmm3,xmm6             ; transpose coefficients(phase 2)
          unpcklps2 xmm6,xmm7             ; xmm6=(00 10 20 30)
          unpckhps2 xmm3,xmm7             ; xmm3=(01 11 21 31)
          movaps    xmm0,xmm1             ; transpose coefficients(phase 2)
          unpcklps2 xmm1,xmm2             ; xmm1=(02 12 22 32)
          unpckhps2 xmm0,xmm2             ; xmm0=(03 13 23 33)
  
          movaps  xmm7, XMMWORD [wk(0)]   ; xmm7=(60 70 61 71)
          movaps  xmm2, XMMWORD [wk(1)]   ; xmm2=(62 72 63 73)
  
          movaps  XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
          movaps  XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
          movaps  XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
          movaps  XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
  
          movaps    xmm6,xmm5             ; transpose coefficients(phase 2)
          unpcklps2 xmm5,xmm7             ; xmm5=(40 50 60 70)
          unpckhps2 xmm6,xmm7             ; xmm6=(41 51 61 71)
          movaps    xmm3,xmm4             ; transpose coefficients(phase 2)
          unpcklps2 xmm4,xmm2             ; xmm4=(42 52 62 72)
          unpckhps2 xmm3,xmm2             ; xmm3=(43 53 63 73)
  
          movaps  XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
          movaps  XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
          movaps  XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
          movaps  XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
  
  .nextcolumn:
          add     esi, byte 4*SIZEOF_JCOEF                ; coef_block
          add     edx, byte 4*SIZEOF_FLOAT_MULT_TYPE      ; quantptr
          add     edi,      4*DCTSIZE*SIZEOF_FAST_FLOAT   ; wsptr
          dec     ecx                                     ; ctr
          jnz     near .columnloop
  
          ; -- Prefetch the next coefficient block
  
          prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
          prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
          prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
          prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
  
          ; ---- Pass 2: process rows from work array, store into output array.
  
          mov     eax, [original_ebp]
          lea     esi, [workspace]                        ; FAST_FLOAT *wsptr
          mov     edi, JSAMPARRAY [output_buf(eax)]       ; (JSAMPROW *)
          mov     eax, JDIMENSION [output_col(eax)]
          mov     ecx, DCTSIZE/4                          ; ctr
          alignx  16,7
  .rowloop:
  
          ; -- Even part
  
          movaps  xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
  
          movaps  xmm4,xmm0
          movaps  xmm5,xmm1
          subps   xmm0,xmm2               ; xmm0=tmp11
          subps   xmm1,xmm3
          addps   xmm4,xmm2               ; xmm4=tmp10
          addps   xmm5,xmm3               ; xmm5=tmp13
  
          mulps   xmm1,[GOTOFF(ebx,PD_1_414)]
          subps   xmm1,xmm5               ; xmm1=tmp12
  
          movaps  xmm6,xmm4
          movaps  xmm7,xmm0
          subps   xmm4,xmm5               ; xmm4=tmp3
          subps   xmm0,xmm1               ; xmm0=tmp2
          addps   xmm6,xmm5               ; xmm6=tmp0
          addps   xmm7,xmm1               ; xmm7=tmp1
  
          movaps  XMMWORD [wk(1)], xmm4   ; tmp3
          movaps  XMMWORD [wk(0)], xmm0   ; tmp2
  
          ; -- Odd part
  
          movaps  xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
          movaps  xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
  
          movaps  xmm4,xmm2
          movaps  xmm0,xmm5
          addps   xmm2,xmm1               ; xmm2=z11
          addps   xmm5,xmm3               ; xmm5=z13
          subps   xmm4,xmm1               ; xmm4=z12
          subps   xmm0,xmm3               ; xmm0=z10
  
          movaps  xmm1,xmm2
          subps   xmm2,xmm5
          addps   xmm1,xmm5               ; xmm1=tmp7
  
          mulps   xmm2,[GOTOFF(ebx,PD_1_414)]     ; xmm2=tmp11
  
          movaps  xmm3,xmm0
          addps   xmm0,xmm4
          mulps   xmm0,[GOTOFF(ebx,PD_1_847)]     ; xmm0=z5
          mulps   xmm3,[GOTOFF(ebx,PD_M2_613)]    ; xmm3=(z10 * -2.613125930)
          mulps   xmm4,[GOTOFF(ebx,PD_1_082)]     ; xmm4=(z12 * 1.082392200)
          addps   xmm3,xmm0               ; xmm3=tmp12
          subps   xmm4,xmm0               ; xmm4=tmp10
  
          ; -- Final output stage
  
          subps   xmm3,xmm1               ; xmm3=tmp6
          movaps  xmm5,xmm6
          movaps  xmm0,xmm7
          addps   xmm6,xmm1               ; xmm6=data0=(00 10 20 30)
          addps   xmm7,xmm3               ; xmm7=data1=(01 11 21 31)
          subps   xmm5,xmm1               ; xmm5=data7=(07 17 27 37)
          subps   xmm0,xmm3               ; xmm0=data6=(06 16 26 36)
          subps   xmm2,xmm3               ; xmm2=tmp5
  
          movaps  xmm1,[GOTOFF(ebx,PD_0_125)]     ; xmm1=[PD_0_125]
  
          mulps   xmm6,xmm1               ; descale(1/8)
          mulps   xmm7,xmm1               ; descale(1/8)
          mulps   xmm5,xmm1               ; descale(1/8)
          mulps   xmm0,xmm1               ; descale(1/8)
  
          movhlps   xmm3,xmm6
          movhlps   xmm1,xmm7
          cvtps2pi  mm0,xmm6              ; round to int32, mm0=data0L=(00 10)
          cvtps2pi  mm1,xmm7              ; round to int32, mm1=data1L=(01 11)
          cvtps2pi  mm2,xmm3              ; round to int32, mm2=data0H=(20 30)
          cvtps2pi  mm3,xmm1              ; round to int32, mm3=data1H=(21 31)
          packssdw  mm0,mm2               ; mm0=data0=(00 10 20 30)
          packssdw  mm1,mm3               ; mm1=data1=(01 11 21 31)
  
          movhlps   xmm6,xmm5
          movhlps   xmm7,xmm0
          cvtps2pi  mm4,xmm5              ; round to int32, mm4=data7L=(07 17)
          cvtps2pi  mm5,xmm0              ; round to int32, mm5=data6L=(06 16)
          cvtps2pi  mm6,xmm6              ; round to int32, mm6=data7H=(27 37)
          cvtps2pi  mm7,xmm7              ; round to int32, mm7=data6H=(26 36)
          packssdw  mm4,mm6               ; mm4=data7=(07 17 27 37)
          packssdw  mm5,mm7               ; mm5=data6=(06 16 26 36)
  
          packsswb  mm0,mm5               ; mm0=(00 10 20 30 06 16 26 36)
          packsswb  mm1,mm4               ; mm1=(01 11 21 31 07 17 27 37)
  
          movaps  xmm3, XMMWORD [wk(0)]   ; xmm3=tmp2
          movaps  xmm1, XMMWORD [wk(1)]   ; xmm1=tmp3
  
          movaps  xmm6,[GOTOFF(ebx,PD_0_125)]     ; xmm6=[PD_0_125]
  
          addps   xmm4,xmm2               ; xmm4=tmp4
          movaps  xmm5,xmm3
          movaps  xmm0,xmm1
          addps   xmm3,xmm2               ; xmm3=data2=(02 12 22 32)
          addps   xmm1,xmm4               ; xmm1=data4=(04 14 24 34)
          subps   xmm5,xmm2               ; xmm5=data5=(05 15 25 35)
          subps   xmm0,xmm4               ; xmm0=data3=(03 13 23 33)
  
          mulps   xmm3,xmm6               ; descale(1/8)
          mulps   xmm1,xmm6               ; descale(1/8)
          mulps   xmm5,xmm6               ; descale(1/8)
          mulps   xmm0,xmm6               ; descale(1/8)
  
          movhlps   xmm7,xmm3
          movhlps   xmm2,xmm1
          cvtps2pi  mm2,xmm3              ; round to int32, mm2=data2L=(02 12)
          cvtps2pi  mm3,xmm1              ; round to int32, mm3=data4L=(04 14)
          cvtps2pi  mm6,xmm7              ; round to int32, mm6=data2H=(22 32)
          cvtps2pi  mm7,xmm2              ; round to int32, mm7=data4H=(24 34)
          packssdw  mm2,mm6               ; mm2=data2=(02 12 22 32)
          packssdw  mm3,mm7               ; mm3=data4=(04 14 24 34)
  
          movhlps   xmm4,xmm5
          movhlps   xmm6,xmm0
          cvtps2pi  mm5,xmm5              ; round to int32, mm5=data5L=(05 15)
          cvtps2pi  mm4,xmm0              ; round to int32, mm4=data3L=(03 13)
          cvtps2pi  mm6,xmm4              ; round to int32, mm6=data5H=(25 35)
          cvtps2pi  mm7,xmm6              ; round to int32, mm7=data3H=(23 33)
          packssdw  mm5,mm6               ; mm5=data5=(05 15 25 35)
          packssdw  mm4,mm7               ; mm4=data3=(03 13 23 33)
  
          movq      mm6,[GOTOFF(ebx,PB_CENTERJSAMP)]      ; mm6=[PB_CENTERJSAMP]
  
          packsswb  mm2,mm3               ; mm2=(02 12 22 32 04 14 24 34)
          packsswb  mm4,mm5               ; mm4=(03 13 23 33 05 15 25 35)
  
          paddb     mm0,mm6
          paddb     mm1,mm6
          paddb     mm2,mm6
          paddb     mm4,mm6
  
          movq      mm7,mm0               ; transpose coefficients(phase 1)
          punpcklbw mm0,mm1               ; mm0=(00 01 10 11 20 21 30 31)
          punpckhbw mm7,mm1               ; mm7=(06 07 16 17 26 27 36 37)
          movq      mm3,mm2               ; transpose coefficients(phase 1)
          punpcklbw mm2,mm4               ; mm2=(02 03 12 13 22 23 32 33)
          punpckhbw mm3,mm4               ; mm3=(04 05 14 15 24 25 34 35)
  
          movq      mm5,mm0               ; transpose coefficients(phase 2)
          punpcklwd mm0,mm2               ; mm0=(00 01 02 03 10 11 12 13)
          punpckhwd mm5,mm2               ; mm5=(20 21 22 23 30 31 32 33)
          movq      mm6,mm3               ; transpose coefficients(phase 2)
          punpcklwd mm3,mm7               ; mm3=(04 05 06 07 14 15 16 17)
          punpckhwd mm6,mm7               ; mm6=(24 25 26 27 34 35 36 37)
  
          movq      mm1,mm0               ; transpose coefficients(phase 3)
          punpckldq mm0,mm3               ; mm0=(00 01 02 03 04 05 06 07)
          punpckhdq mm1,mm3               ; mm1=(10 11 12 13 14 15 16 17)
          movq      mm4,mm5               ; transpose coefficients(phase 3)
          punpckldq mm5,mm6               ; mm5=(20 21 22 23 24 25 26 27)
          punpckhdq mm4,mm6               ; mm4=(30 31 32 33 34 35 36 37)
  
          pushpic ebx                     ; save GOT address
  
          mov     edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
          mov     ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
          movq    MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
          movq    MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1
          mov     edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
          mov     ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
          movq    MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5
          movq    MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
  
          poppic  ebx                     ; restore GOT address
  
          add     esi, byte 4*SIZEOF_FAST_FLOAT   ; wsptr
          add     edi, byte 4*SIZEOF_JSAMPROW
          dec     ecx                             ; ctr
          jnz     near .rowloop
  
          emms            ; empty MMX state
  
          pop     edi
          pop     esi
  ;       pop     edx             ; need not be preserved
  ;       pop     ecx             ; need not be preserved
          pop     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
  