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https://github.com/gryf/wmaker.git
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697 lines
17 KiB
C
697 lines
17 KiB
C
/* x86_convert.c - convert RImage to XImage with x86 optimizations
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*
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* Raster graphics library
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*
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* Copyright (c) 2000 Alfredo K. Kojima
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#ifdef ASM_X86
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#ifdef ASM_X86_MMX
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int
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x86_check_mmx()
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{
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static int result = -1;
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if (result >= 0)
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return result;
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result = 0;
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asm volatile
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("pushal \n" // please dont forget this in any asm
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"pushfl \n" // check whether cpuid supported
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"pop %%eax \n"
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"movl %%eax, %%ebx \n"
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"xorl $(1<<21), %%eax \n"
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"pushl %%eax \n"
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"popfl \n"
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"pushfl \n"
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"popl %%eax \n"
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"xorl %%ebx, %%eax \n"
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"andl $(1<<21), %%eax \n"
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"jz .NotPentium \n"
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"xorl %%eax, %%eax \n" // no eax effect because of the movl below
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// except reseting flags. is it needed?
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"movl $1, %%eax \n"
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"cpuid \n"
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"test $(1<<23), %%edx \n"
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"jz .NotMMX \n"
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"popal \n" // popal needed because the address of
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"movl $1, %0 \n" // variable %0 may be kept in a register
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"jmp .noPop \n"
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".NotMMX: \n"
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".NotPentium: \n"
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"popal \n"
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".noPop: \n"
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: "=m" (result));
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return result;
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}
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/*
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* TODO:
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* 32/8 24/8 32/16 24/16 32/24 24/24
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* PPlain YES YES
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* MMX DONE
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*
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*
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* - try to align stack (local variable space) into quadword boundary
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*/
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void
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x86_mmx_TrueColor_32_to_16(unsigned char *image, // 8
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unsigned short *ximage, // 12
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short *err, // 16
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short *nerr, // 20
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short *rtable, // 24
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short *gtable, // 28
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short *btable, // 32
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int dr, // 36
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int dg, // 40
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int db, // 44
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unsigned int roffs, // 48
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unsigned int goffs, // 52
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unsigned int boffs, // 56
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int width, // 60
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int height, // 64
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int line_offset) // 68
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{
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/*
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int x; //-4
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long long rrggbbaa;// -16
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long long pixel; //-24
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short *tmp_err; //-32
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short *tmp_nerr; //-36
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*/
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asm volatile
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(
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"subl $128, %esp \n" // alloc some more stack
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"pushal \n"
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// pack dr, dg and db into mm6
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"movl 36(%ebp), %eax \n"
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"movl 40(%ebp), %ebx \n"
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"movw %ax, -16(%ebp) \n"
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"movw %bx, -14(%ebp) \n"
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"movl 44(%ebp), %eax \n"
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"movw $0, -10(%ebp) \n"
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"movw %ax, -12(%ebp) \n"
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"movq -16(%ebp), %mm6 \n" // dr dg db 0
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// pack 4|4|4|4 into mm7, for shifting (/16)
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"movl $0x00040004, -16(%ebp) \n"
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"movl $0x00040004, -12(%ebp) \n"
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"movq -16(%ebp), %mm7 \n"
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// store constant values for using with mmx when dithering
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"movl $0x00070007, -16(%ebp) \n"
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"movl $0x00070007, -12(%ebp) \n"
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"movq -16(%ebp), %mm5 \n"
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"movl $0x00050005, -16(%ebp) \n"
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"movl $0x00050005, -12(%ebp) \n"
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"movq -16(%ebp), %mm4 \n"
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"movl $0x00030003, -16(%ebp) \n"
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"movl $0x00030003, -12(%ebp) \n"
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"movq -16(%ebp), %mm3 \n"
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// process 1 pixel / cycle, each component treated as 16bit
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"movl 8(%ebp), %esi \n" // esi = image->data
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".LoopYa: \n"
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"movl 60(%ebp), %eax \n"
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"movl %eax, -4(%ebp) \n" // x = width
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"movl 64(%ebp), %eax \n"
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"decl %eax \n" // y--
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"movl %eax, 64(%ebp) \n"
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"js .Enda \n" // if y < 0, goto end
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"andl $1, %eax \n"
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"jz .LoopY_1a \n" // if (y&1) goto LoopY_1
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".LoopY_0a: \n"
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"movl 16(%ebp), %ebx \n" // ebx = err
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"movl %ebx, -36(%ebp) \n" // [-36] = err
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"movl 20(%ebp), %eax \n" //
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"movl %eax, -32(%ebp) \n" // [-32] = nerr
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"jmp .LoopXa \n"
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".LoopY_1a: \n"
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"movl 20(%ebp), %ebx \n" // ebx = nerr
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"movl %ebx, -36(%ebp) \n" // [-36] = nerr
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"movl 16(%ebp), %eax \n" //
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"movl %eax, -32(%ebp) \n" // [-32] = eerr
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".align 16 \n"
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".LoopXa: \n"
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// calculate errors and pixel components
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// depend on ebx, esi, mm6
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"movq (%ebx), %mm1 \n" // mm1 = error[0..3]
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"punpcklbw (%esi), %mm0 \n" // mm0 = image->data[0..3]
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"psrlw $8, %mm0 \n" // fixup mm0
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"paddusb %mm1, %mm0 \n" // mm0 = mm0 + mm1 (sat. to 255)
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"movq %mm0, -24(%ebp) \n" // save the pixel
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"movzwl -24(%ebp), %ecx \n" // ecx = pixel.red
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"movl 24(%ebp), %edi \n" // edi = rtable
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//agi
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"leal (%edi, %ecx, 2), %eax \n" // eax = &rtable[pixel.red]
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// agi
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"movw (%eax), %dx \n" // dx = rtable[pixel.red]
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"movw %dx, -16(%ebp) \n" // save rr
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"movzwl -22(%ebp), %ecx \n" // ecx = pixel.green
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"movl 28(%ebp), %edi \n" // edi = gtable
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//agi
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"leal (%edi, %ecx, 2), %eax \n" // eax = >able[pixel.green]
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//agi
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"movw (%eax), %dx \n" // dx = gtable[pixel.green]
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"movw %dx, -14(%ebp) \n" // save gg
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"movzwl -20(%ebp), %ecx \n" // ecx = pixel.blue
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"movl 32(%ebp), %edi \n" // ebx = btable
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//agi
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"leal (%edi, %ecx, 2), %eax \n" // eax = &btable[pixel.blue]
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//agi
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"movw (%eax), %dx \n" // dx = btable[pixel.blue]
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"movw %dx, -12(%ebp) \n" // save bb
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"movw $0, -10(%ebp) \n" // save dummy aa
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"movq -16(%ebp), %mm1 \n" // load mm1 with rrggbbaa
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"pmullw %mm6, %mm1 \n" // mm1 = rr*dr|...
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"psubsw %mm1, %mm0 \n" // error = pixel - mm1
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// distribute the error
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// depend on mm0, mm7, mm3, mm4, mm5
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"movl -36(%ebp), %ebx \n"
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"movq %mm0, %mm1 \n"
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"pmullw %mm5, %mm1 \n" // mm1 = mm1*7
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"psrlw %mm7, %mm1 \n" // mm1 = mm1/16
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"paddw 8(%ebx), %mm1 \n"
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"movq %mm1, 8(%ebx) \n" // err[x+1,y] = rer*7/16
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"movl -32(%ebp), %ebx \n"
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"movq %mm0, %mm1 \n"
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"pmullw %mm4, %mm1 \n" // mm1 = mm1*5
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"psrlw %mm7, %mm1 \n" // mm1 = mm1/16
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"paddw -8(%ebx), %mm1 \n"
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"movq %mm1, -8(%ebx) \n" // err[x-1,y+1] += rer*3/16
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"movq %mm0, %mm1 \n"
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"pmullw %mm3, %mm1 \n" // mm1 = mm1*3
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"psrlw %mm7, %mm1 \n" // mm1 = mm1/16
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"paddw 8(%ebx), %mm1 \n"
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"movq %mm1, (%ebx) \n" // err[x,y+1] += rer*5/16
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"psrlw %mm7, %mm0 \n" // mm0 = mm0/16
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"movq %mm0, 8(%ebx) \n" // err[x+1,y+1] = rer/16
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// calculate final pixel value and store
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"movl 48(%ebp), %ecx \n"
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"movw -16(%ebp), %ax \n"
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"shlw %cl, %ax \n" //NP* ax = r<<roffs
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"movl 52(%ebp), %ecx \n"
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"movw -14(%ebp), %bx \n"
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"shlw %cl, %bx \n" //NP*
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"orw %bx, %ax \n"
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"movl 56(%ebp), %ecx \n"
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"movw -12(%ebp), %bx \n"
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"shlw %cl, %bx \n" //NP*
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"orw %bx, %ax \n"
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"movl 12(%ebp), %edx \n"
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"movw %ax, (%edx) \n"
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"addl $2, %edx \n" // increment ximage
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"movl %edx, 12(%ebp) \n"
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// prepare for next iteration on X
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"addl $8, -32(%ebp) \n" // nerr += 8
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"movl -36(%ebp), %ebx \n"
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"addl $8, %ebx \n"
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"movl %ebx, -36(%ebp) \n" // ebx = err += 8
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// Note: in the last pixel, this would cause an invalid memory access
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// because, punpcklbw is used (which reads 8 bytes) and the last
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// pixel is only 4 bytes. This is no problem because the image data
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// was allocated with extra 4 bytes when created.
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"addl $4, %esi \n" // image->data += 4
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"decl -4(%ebp) \n" // x--
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"jnz .LoopXa \n" // if x>0, goto .LoopX
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// depend on edx
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"addl 68(%ebp), %edx \n" // add extra offset to ximage
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"movl %edx, 12(%ebp) \n"
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"jmp .LoopYa \n"
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".Enda: \n" // THE END
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"emms \n"
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"popal \n"
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);
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}
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void
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x86_mmx_TrueColor_24_to_16(unsigned char *image, // 8
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unsigned short *ximage, // 12
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short *err, // 16
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short *nerr, // 20
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short *rtable, // 24
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short *gtable, // 28
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short *btable, // 32
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int dr, // 36
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int dg, // 40
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int db, // 44
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unsigned int roffs, // 48
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unsigned int goffs, // 52
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unsigned int boffs, // 56
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int width, // 60
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int height, // 64
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int line_offset) // 68
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{
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/*
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int x; //-4
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long long rrggbbaa;// -16
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long long pixel; //-24
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short *tmp_err; //-32
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short *tmp_nerr; //-36
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*
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int w1; // -64
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int w2; // -68
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*/
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asm volatile
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(
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"subl $128, %esp \n" // alloc some more stack
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"pushal \n"
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"movl 60(%ebp), %eax \n" // eax = width
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"movl %eax, %ebx \n"
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"shrl $2, %eax \n"
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"movl %eax, -64(%ebp) \n" // w1 = width / 4
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"andl $3, %ebx \n"
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"movl %ebx, -68(%ebp) \n" // w2 = width % 4
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".LoopYc: \n"
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"movl 60(%ebp), %eax \n"
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"movl %eax, -4(%ebp) \n" // x = width
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"decl 64(%ebp) \n" // height--
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"js .Endc \n" // if height < 0 then end
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"movl 64(%ebp), %eax \n"
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"decl %eax \n" // y--
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"movl %eax, 64(%ebp) \n"
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"js .Endc \n" // if y < 0, goto end
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"andl $1, %eax \n"
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"jz .LoopY_1c \n" // if (y&1) goto LoopY_1
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".LoopY_0c: \n"
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"movl 16(%ebp), %ebx \n" // ebx = err
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"movl %ebx, -36(%ebp) \n" // [-36] = err
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"movl 20(%ebp), %eax \n" //
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"movl %eax, -32(%ebp) \n" // [-32] = nerr
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"jmp .LoopX_1c \n"
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".LoopY_1c: \n"
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"movl 20(%ebp), %ebx \n" // ebx = nerr
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"movl %ebx, -36(%ebp) \n" // [-36] = nerr
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"movl 16(%ebp), %eax \n" //
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"movl %eax, -32(%ebp) \n" // [-32] = eerr
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".align 16 \n"
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"movl %eax, -4(%ebp) \n" // x = w1
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".LoopX_1c: \n"
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"decl -4(%ebp) \n" // x--
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"js .Xend1_c \n" // if x < 0 then end
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// do conversion of 4 pixels
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"movq 16(%ebp), %mm0 \n" // mm0 = err
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"jmp .LoopX_1c \n"
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".Xend1_c: \n"
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"movl -68(%ebp), %eax \n"
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"movl %eax, -4(%ebp) \n" // x = w2
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".LoopX_2c: \n"
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"decl -4(%ebp) \n" // x--
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"js .Xend2_c \n" //
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// do conversion
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"jmp .LoopX_2c \n"
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".Xend2_c: \n"
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"movl -64(%ebp), %eax \n"
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"jmp .LoopYc \n"
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".Endc: \n" // THE END
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"emms \n"
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"popal \n"
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);
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}
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#endif /* ASM_X86_MMX */
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void
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x86_PseudoColor_32_to_8(unsigned char *image, // 8
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unsigned char *ximage, // 12
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char *err, // 16
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char *nerr, // 20
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short *ctable, // 24
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int dr, // 28
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int dg, // 32
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int db, // 36
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unsigned long *pixels, // 40
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int cpc, // 44
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int width, // 48
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int height, // 52
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int bytesPerPixel, // 56
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int line_offset) // 60
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{
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/*
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* int x; -4
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* int cpcpc; -8
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*
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* int rr; -12
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* int gg; -16
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* int bb; -20
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*
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* char ndr; -21
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* char ndg; -22
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* char ndb; -23
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*
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* char *err; -32
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* char *nerr; -36
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*
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*/
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asm volatile
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(
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"subl $128, %esp \n" // alloc some stack space
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"pushal \n"
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"movl 44(%ebp), %eax \n"
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"mulb 44(%ebp) \n"
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"movl %eax, -8(%ebp) \n" // cpcpc = cpc*cpc
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// eax will always be <= 0xffff
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// process 1 pixel / cycle, each component treated as 16bit
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"movl 8(%ebp), %esi \n" // esi = image->data
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".LoopYb: \n"
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"movl 48(%ebp), %ecx \n"
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"movl %ecx, -4(%ebp) \n" // x = width
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"movl 52(%ebp), %ecx \n"
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"decl %ecx \n" // y--
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"movl %ecx, 52(%ebp) \n"
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"js .Endb \n" // if y < 0, goto end
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"andl $1, %ecx \n"
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"jz .LoopY_1b \n" // if (y&1) goto LoopY_1
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".LoopY_0b: \n"
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"movl 16(%ebp), %ebx \n" // ebx = err
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//useless "movl %ebx, -36(%ebp) \n" // [-36] = err
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"movl 20(%ebp), %ecx \n" //
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"movl %ecx, -32(%ebp) \n" // [-32] = nerr
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"movl $0, (%ecx) \n" // init error of nerr[0] to 0
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|
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"jmp .LoopXb \n"
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".LoopY_1b: \n"
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|
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"movl 20(%ebp), %ebx \n" // ebx = nerr
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//useless "movl %ebx, -36(%ebp) \n" // [-36] = nerr
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"movl 16(%ebp), %ecx \n" //
|
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"movl %ecx, -32(%ebp) \n" // [-32] = err
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|
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"movl $0, (%ecx) \n" // init error of nerr[0] to 0
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".align 16 \n"
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".LoopXb: \n"
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|
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"movl 24(%ebp), %edi \n" // edi = ctable
|
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"xorl %edx, %edx \n" // zero the upper word on edx
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|
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// RED
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|
|
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// depends on ebx==err, esi==image->data, edi
|
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"movzbw (%esi), %dx \n" // dx = image->data[0]
|
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"movsbw (%ebx), %ax \n" // ax = error[0]
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"addw %ax, %dx \n" // pixel.red = data[0] + error[0]
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|
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"testb %dh, %dh \n" // test if pixel.red < 0 or > 255
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"jz .OKRb \n" // 0 <= pixel.red <= 255
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"js .NEGRb \n" // pixel.red < 0
|
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"movw $0xff, %dx \n" // pixel.red > 255
|
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"jmp .OKRb \n"
|
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".NEGRb: \n"
|
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"xorw %dx, %dx \n"
|
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".OKRb: \n"
|
|
//partial reg
|
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"leal (%edi, %edx, 2), %ecx \n" // ecx = &ctable[pixel.red]
|
|
//agi
|
|
"movl (%ecx), %eax \n" // ax = ctable[pixel.red]
|
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"movw %ax, -12(%ebp) \n" // save rr
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|
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"mulb 28(%ebp) \n" // ax = rr*dr
|
|
"subw %ax, %dx \n" // rer = dx = dx - rr*dr
|
|
|
|
"movswl %dx, %eax \n" // save rer
|
|
|
|
// distribute error
|
|
"leal (, %eax, 8), %ecx \n"
|
|
"subw %dx, %cx \n" // cx = rer * 7
|
|
"sarw $4, %cx \n" // cx = rer * 7 / 16
|
|
"addb %cl, 4(%ebx) \n" // err[x+1] += rer * 7 / 16
|
|
|
|
"movl -32(%ebp), %ecx \n" // ecx = nerr
|
|
|
|
"leaw (%eax, %eax, 4), %dx \n" // dx = rer * 5
|
|
"sarw $4, %dx \n" // dx = rer * 5 / 16
|
|
"addb %dl, (%ecx) \n" // nerr[x] += rer * 5 / 16
|
|
|
|
"leaw (%eax, %eax, 2), %dx \n" // dx = rer * 3
|
|
"sarw $4, %dx \n" // dx = rer * 3 / 16
|
|
"addb %dl, -4(%ecx) \n" // nerr[x-1] += rer * 3 / 16
|
|
|
|
"sarw $4, %ax \n" // ax = rer / 16
|
|
"movb %al, 4(%ecx) \n" // nerr[x+1] = rer / 16
|
|
|
|
|
|
// GREEN
|
|
|
|
// depends on ebx, esi, edi
|
|
"movzbw 1(%esi), %dx \n" // dx = image->data[1]
|
|
"movsbw 1(%ebx), %ax \n" // ax = error[1]
|
|
"addw %ax, %dx \n" // pixel.grn = data[1] + error[1]
|
|
|
|
"testb %dh, %dh \n" // test if pixel.grn < 0 or > 255
|
|
"jz .OKGb \n" // 0 <= pixel.grn <= 255
|
|
"js .NEGGb \n" // pixel.grn < 0
|
|
"movw $0xff, %dx \n" // pixel.grn > 255
|
|
"jmp .OKGb \n"
|
|
".NEGGb: \n"
|
|
"xorw %dx, %dx \n"
|
|
".OKGb: \n"
|
|
// partial reg
|
|
"leal (%edi, %edx, 2), %ecx \n" // ecx = &ctable[pixel.grn]
|
|
//agi
|
|
"movw (%ecx), %ax \n" // ax = ctable[pixel.grn]
|
|
"movw %ax, -16(%ebp) \n" // save gg
|
|
|
|
"mulb 28(%ebp) \n" // ax = gg*dg
|
|
"subw %ax, %dx \n" // ger = dx = dx - gg*dg
|
|
|
|
"movswl %dx, %eax \n" // save ger
|
|
|
|
// distribute error
|
|
|
|
"leal (, %eax, 8), %ecx \n"
|
|
"subw %dx, %cx \n" // cx = ger * 7
|
|
"sarw $4, %cx \n" // cx = ger * 7 / 16
|
|
"addb %cl, 5(%ebx) \n" // err[x+1] += ger * 7 / 16
|
|
|
|
"movl -32(%ebp), %ecx \n" // ecx = nerr
|
|
|
|
"leaw (%eax, %eax, 4), %dx \n" // dx = ger * 5
|
|
"sarw $4, %dx \n" // dx = ger * 5 / 16
|
|
"addb %dl, 1(%ecx) \n" // nerr[x] += ger * 5 / 16
|
|
|
|
"leaw (%eax, %eax, 2), %dx \n" // dx = ger * 3
|
|
"sarw $4, %dx \n" // dx = ger * 3 / 16
|
|
"addb %dl, -3(%ecx) \n" // nerr[x-1] += ger * 3 / 16
|
|
|
|
"sarw $4, %ax \n" // ax = ger / 16
|
|
"movb %al, 5(%ecx) \n" // nerr[x+1] = ger / 16
|
|
|
|
|
|
// BLUE
|
|
|
|
// depends on ebx, esi
|
|
"movzbw 2(%esi), %dx \n" // dx = image->data[2]
|
|
"movsbw 2(%ebx), %ax \n" // ax = error[2]
|
|
"addw %ax, %dx \n" // pixel.grn = data[2] + error[2]
|
|
|
|
"testb %dh, %dh \n" // test if pixel.blu < 0 or > 255
|
|
"jz .OKBb \n" // 0 <= pixel.blu <= 255
|
|
"js .NEGBb \n" // pixel.blu < 0
|
|
"movw $0xff, %dx \n" // pixel.blu > 255
|
|
"jmp .OKBb \n"
|
|
".NEGBb: \n"
|
|
"xorw %dx, %dx \n"
|
|
".OKBb: \n"
|
|
//partial reg
|
|
"leal (%edi, %edx, 2), %ecx \n" // ecx = &ctable[pixel.blu]
|
|
//agi
|
|
"movw (%ecx), %ax \n" // ax = ctable[pixel.blu]
|
|
"movw %ax, -20(%ebp) \n" // save bb
|
|
|
|
"mulb 28(%ebp) \n" // ax = bb*db
|
|
"subw %ax, %dx \n" // ber = dx = dx - bb*db
|
|
"movswl %dx, %eax \n" // save ber
|
|
|
|
// distribute error
|
|
"leal (, %eax, 8), %ecx \n"
|
|
"subw %dx, %cx \n" // cx = ber * 7
|
|
"sarw $4, %cx \n" // cx = ber * 7 / 16
|
|
"addb %cl, 6(%ebx) \n" // err[x+1] += ber * 7 / 16
|
|
|
|
"movl -32(%ebp), %ecx \n" // ecx = nerr
|
|
|
|
"leaw (%eax, %eax, 4), %dx \n" // dx = ber * 5
|
|
"sarw $4, %dx \n" // dx = ber * 5 / 16
|
|
"addb %dl, 2(%ecx) \n" // nerr[x] += ber * 5 / 16
|
|
|
|
"leaw (%eax, %eax, 2), %dx \n" // dx = ber * 3
|
|
"sarw $4, %dx \n" // dx = ber * 3 / 16
|
|
"addb %dl, -4(%ecx) \n" // nerr[x-1] += ber * 3 / 16
|
|
|
|
"sarw $4, %ax \n" // ax = ber / 16
|
|
"movb %al, 6(%ecx) \n" // nerr[x+1] = ber / 16
|
|
|
|
"andl $0xffff, %eax \n"
|
|
// depends on eax & 0xffff0000 == 0
|
|
// calculate the index of the value of the pixel
|
|
"movw -12(%ebp), %ax \n" // ax = rr
|
|
"mulb -8(%ebp) \n" // ax = cpcpc*rr
|
|
"movw %ax, %cx \n"
|
|
"movw -16(%ebp), %ax \n" // ax = gg
|
|
"mulb 44(%ebp) \n" // ax = cpc*gg
|
|
"addw %cx, %ax \n" // ax = cpc*gg + cpcpc*rr
|
|
"addw -20(%ebp), %ax \n" // ax = cpcpc*rr + cpc*gg + bb
|
|
|
|
"movl 40(%ebp), %ecx \n"
|
|
//agi
|
|
"leal (%ecx, %eax, 4), %edx \n"
|
|
//agi
|
|
"movb (%edx), %cl \n" // cl = pixels[ax]
|
|
|
|
// store the pixel
|
|
"movl 12(%ebp), %eax \n"
|
|
"movb %cl, (%eax) \n" // *ximage = cl
|
|
"incl 12(%ebp) \n" // ximage++
|
|
|
|
// prepare for next iteration on X
|
|
|
|
"addl $4, -32(%ebp) \n" // nerr += 4
|
|
"addl $4, %ebx \n" // err += 4
|
|
|
|
"addl 56(%ebp), %esi \n" // image->data += bpp
|
|
|
|
"decl -4(%ebp) \n" // x--
|
|
"jnz .LoopXb \n" // if x>0, goto .LoopX
|
|
|
|
|
|
"movl 60(%ebp), %eax \n"
|
|
"addl %eax, 12(%ebp) \n" // add extra offset to ximage
|
|
|
|
"jmp .LoopYb \n"
|
|
|
|
".Endb: \n"
|
|
|
|
"emms \n"
|
|
"popal \n"
|
|
);
|
|
|
|
|
|
}
|
|
|
|
#endif /* ASM_X86 */
|