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Viewing changes to simd/jcqnts2f-64.asm

  • Committer: Package Import Robot
  • Author(s): Tom Gall
  • Date: 2011-09-13 03:53:56 UTC
  • Revision ID: package-import@ubuntu.com-20110913035356-1jybp1r6on1l3son
Tags: upstream-1.1.90+svn702
Import upstream version 1.1.90+svn702

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simd/jcqnts2f-64.asm
 
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;
 
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; jcqnts2f-64.asm - sample data conversion and quantization (64-bit SSE & SSE2)
 
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;
 
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
 
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; Copyright 2009 D. R. Commander
 
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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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; [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_TEXT
 
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        BITS    64
 
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;
 
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; Load data into workspace, applying unsigned->signed conversion
 
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;
 
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; GLOBAL(void)
 
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; jsimd_convsamp_float_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col,
 
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;                            FAST_FLOAT * workspace);
 
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;
 
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; r10 = JSAMPARRAY sample_data
 
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; r11 = JDIMENSION start_col
 
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; r12 = FAST_FLOAT * workspace
 
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        align   16
 
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        global  EXTN(jsimd_convsamp_float_sse2)
 
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EXTN(jsimd_convsamp_float_sse2):
 
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        push    rbp
 
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        mov     rax,rsp
 
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        mov     rbp,rsp
 
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        collect_args
 
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        push    rbx
 
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        pcmpeqw  xmm7,xmm7
 
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        psllw    xmm7,7
 
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        packsswb xmm7,xmm7              ; xmm7 = PB_CENTERJSAMPLE (0x808080..)
 
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        mov rsi, r10
 
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        mov     rax, r11
 
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        mov rdi, r12
 
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        mov     rcx, DCTSIZE/2
 
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.convloop:
 
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        mov     rbx, JSAMPROW [rsi+0*SIZEOF_JSAMPROW]   ; (JSAMPLE *)
 
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        mov rdx, JSAMPROW [rsi+1*SIZEOF_JSAMPROW]       ; (JSAMPLE *)
 
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        movq    xmm0, XMM_MMWORD [rbx+rax*SIZEOF_JSAMPLE]
 
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        movq    xmm1, XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE]
 
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        psubb   xmm0,xmm7                       ; xmm0=(01234567)
 
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        psubb   xmm1,xmm7                       ; xmm1=(89ABCDEF)
 
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        punpcklbw xmm0,xmm0                     ; xmm0=(*0*1*2*3*4*5*6*7)
 
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        punpcklbw xmm1,xmm1                     ; xmm1=(*8*9*A*B*C*D*E*F)
 
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        punpcklwd xmm2,xmm0                     ; xmm2=(***0***1***2***3)
 
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        punpckhwd xmm0,xmm0                     ; xmm0=(***4***5***6***7)
 
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        punpcklwd xmm3,xmm1                     ; xmm3=(***8***9***A***B)
 
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        punpckhwd xmm1,xmm1                     ; xmm1=(***C***D***E***F)
 
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        psrad     xmm2,(DWORD_BIT-BYTE_BIT)     ; xmm2=(0123)
 
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        psrad     xmm0,(DWORD_BIT-BYTE_BIT)     ; xmm0=(4567)
 
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        cvtdq2ps  xmm2,xmm2                     ; xmm2=(0123)
 
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        cvtdq2ps  xmm0,xmm0                     ; xmm0=(4567)
 
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        psrad     xmm3,(DWORD_BIT-BYTE_BIT)     ; xmm3=(89AB)
 
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        psrad     xmm1,(DWORD_BIT-BYTE_BIT)     ; xmm1=(CDEF)
 
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        cvtdq2ps  xmm3,xmm3                     ; xmm3=(89AB)
 
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        cvtdq2ps  xmm1,xmm1                     ; xmm1=(CDEF)
 
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        movaps  XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_FAST_FLOAT)], xmm2
 
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        movaps  XMMWORD [XMMBLOCK(0,1,rdi,SIZEOF_FAST_FLOAT)], xmm0
 
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        movaps  XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_FAST_FLOAT)], xmm3
 
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        movaps  XMMWORD [XMMBLOCK(1,1,rdi,SIZEOF_FAST_FLOAT)], xmm1
 
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        add     rsi, byte 2*SIZEOF_JSAMPROW
 
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        add     rdi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
 
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        dec     rcx
 
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        jnz     short .convloop
 
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        pop     rbx
 
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        uncollect_args
 
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        pop     rbp
 
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        ret
 
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; --------------------------------------------------------------------------
 
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;
 
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; Quantize/descale the coefficients, and store into coef_block
 
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;
 
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; GLOBAL(void)
 
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; jsimd_quantize_float_sse2 (JCOEFPTR coef_block, FAST_FLOAT * divisors,
 
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;                         FAST_FLOAT * workspace);
 
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;
 
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; r10 = JCOEFPTR coef_block
 
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; r11 = FAST_FLOAT * divisors
 
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; r12 = FAST_FLOAT * workspace
 
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        align   16
 
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        global  EXTN(jsimd_quantize_float_sse2)
 
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EXTN(jsimd_quantize_float_sse2):
 
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        push    rbp
 
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        mov     rax,rsp
 
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        mov     rbp,rsp
 
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        collect_args
 
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        mov rsi, r12
 
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        mov rdx, r11
 
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        mov rdi, r10
 
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        mov     rax, DCTSIZE2/16
 
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.quantloop:
 
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        movaps  xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_FAST_FLOAT)]
 
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        movaps  xmm1, XMMWORD [XMMBLOCK(0,1,rsi,SIZEOF_FAST_FLOAT)]
 
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        mulps   xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_FAST_FLOAT)]
 
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        mulps   xmm1, XMMWORD [XMMBLOCK(0,1,rdx,SIZEOF_FAST_FLOAT)]
 
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        movaps  xmm2, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_FAST_FLOAT)]
 
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        movaps  xmm3, XMMWORD [XMMBLOCK(1,1,rsi,SIZEOF_FAST_FLOAT)]
 
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        mulps   xmm2, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_FAST_FLOAT)]
 
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        mulps   xmm3, XMMWORD [XMMBLOCK(1,1,rdx,SIZEOF_FAST_FLOAT)]
 
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        cvtps2dq xmm0,xmm0
 
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        cvtps2dq xmm1,xmm1
 
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        cvtps2dq xmm2,xmm2
 
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        cvtps2dq xmm3,xmm3
 
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        packssdw xmm0,xmm1
 
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        packssdw xmm2,xmm3
 
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        movdqa  XMMWORD [XMMBLOCK(0,0,rdi,SIZEOF_JCOEF)], xmm0
 
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        movdqa  XMMWORD [XMMBLOCK(1,0,rdi,SIZEOF_JCOEF)], xmm2
 
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        add     rsi, byte 16*SIZEOF_FAST_FLOAT
 
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        add     rdx, byte 16*SIZEOF_FAST_FLOAT
 
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        add     rdi, byte 16*SIZEOF_JCOEF
 
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        dec     rax
 
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        jnz     short .quantloop
 
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        uncollect_args
 
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        pop     rbp
 
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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