mirror of
https://github.com/gryf/wmaker.git
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Make asm code readable
This commit is contained in:
Tamas TEVESZ
committed by
Carlos R. Mafra
Carlos R. Mafra
parent
4078af654b
commit
444de5e6b6
@@ -34,17 +34,34 @@ int x86_check_mmx()
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result = 0;
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asm volatile
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("pushal \n\t" // please dont forget this in any asm
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"pushfl \n\t" // check whether cpuid supported
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"pop %%eax \n\t" "movl %%eax, %%ebx \n\t" "xorl $(1<<21), %%eax \n\t" "pushl %%eax \n\t" "popfl \n\t" "pushfl \n\t" "popl %%eax \n\t" "xorl %%ebx, %%eax \n\t" "andl $(1<<21), %%eax \n\t" "jz .NotPentium \n\t" "xorl %%eax, %%eax \n\t" // 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\t" "cpuid \n\t" "test $(1<<23), %%edx \n\t" "jz .NotMMX \n\t" "popal \n\t" // popal needed because the address of
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"movl $1, %0 \n\t" // 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\t"
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"popal \n" ".noPop: \n\t":"=m" (result));
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asm volatile (
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"pushal \n\t" /* please dont forget this in any asm */
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"pushfl \n\t" /* check whether cpuid supported */
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"pop %%eax \n\t"
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"movl %%eax, %%ebx \n\t"
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"xorl $(1<<21), %%eax \n\t"
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"pushl %%eax \n\t"
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"popfl \n\t"
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"pushfl \n\t"
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"popl %%eax \n\t"
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"xorl %%ebx, %%eax \n\t"
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"andl $(1<<21), %%eax \n\t"
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"jz .NotPentium \n\t"
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"xorl %%eax, %%eax \n\t" /* 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\t"
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"cpuid \n\t"
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"test $(1<<23), %%edx \n\t"
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"jz .NotMMX \n\t"
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"popal \n\t" /* popal needed because the address of */
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"movl $1, %0 \n\t" /* variable %0 may be kept in a register */
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"jmp .noPop \n\t"
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".NotMMX: \n\t"
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".NotPentium: \n\t"
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"popal \n\t"
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".noPop: \n\t"
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: "=m" (result)
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);
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return result;
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}
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@@ -90,129 +107,175 @@ x86_mmx_TrueColor_32_to_16(unsigned char *image,
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short *tmp_nerr;
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int x;
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asm volatile
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("pushl %%ebx \n\t"
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// pack dr, dg and db into mm6
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"movl %7, %%eax \n\t" "movl %8, %%ebx \n\t" "movl %9, %%ecx \n\t" "movw %%ax, %16 \n\t" "movw %%bx, %17 \n\t" "movw %%cx, %18 \n\t" "movw $0, %19 \n\t" "movq %16, %%mm6 \n\t" // 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 \n\t"
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"movl $0x00040004, %18 \n\t" "movq %16, %%mm7 \n\t"
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// store constant values for using with mmx when dithering
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"movl $0x00070007, %16 \n\t"
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"movl $0x00070007, %18 \n\t"
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"movq %16, %%mm5 \n\t"
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"movl $0x00050005, %16 \n\t"
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"movl $0x00050005, %18 \n\t"
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"movq %16, %%mm4 \n\t"
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"movl $0x00030003, %16 \n\t"
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"movl $0x00030003, %18 \n\t" "movq %16, %%mm3 \n\t"
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// process 1 pixel / cycle, each component treated as 16bit
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"movl %0, %%esi \n" // esi = image->data
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".LoopYa: \n\t" "movl %13, %%eax \n\t" "movl %%eax, %26 \n\t" // x = width
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"movl %14, %%eax \n\t" "decl %%eax \n\t" // y--
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"movl %%eax, %14 \n\t" "js .Enda \n\t" // if y < 0, goto end
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"andl $1, %%eax \n\t" "jz .LoopY_1a \n" // if (y&1) goto LoopY_1
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".LoopY_0a: \n\t" "movl %2, %%ebx \n\t" // ebx = err
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"movl %%ebx, %25 \n\t" // [-36] = err
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"movl %3, %%eax \n\t" //
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"movl %%eax, %24 \n\t" // [-32] = nerr
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"jmp .LoopXa \n" ".LoopY_1a: \n\t" "movl %3, %%ebx \n\t" // ebx = nerr
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"movl %%ebx, %25 \n\t" // [-36] = nerr
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"movl %2, %%eax \n\t" //
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"movl %%eax, %24 \n\t" // [-32] = eerr
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".align 16 \n" ".LoopXa: \n\t"
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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\t" // mm1 = error[0..3]
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"punpcklbw (%%esi), %%mm0 \n\t" // mm0 = image->data[0..3]
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"psrlw $8, %%mm0 \n\t" // fixup mm0
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"paddusb %%mm1, %%mm0 \n\t" // mm0 = mm0 + mm1 (sat. to 255)
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"movq %%mm0, %20 \n\t" // save the pixel
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"movzwl %20, %%ecx \n\t" // ecx = pixel.red
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"movl %4, %%edi \n\t" // edi = rtable
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//agi
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"leal (%%edi, %%ecx, 2), %%eax \n\t" // eax = &rtable[pixel.red]
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// agi
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"movw (%%eax), %%dx \n\t" // dx = rtable[pixel.red]
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"movw %%dx, %16 \n\t" // save rr
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"movzwl %21, %%ecx \n\t" // ecx = pixel.green
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"movl %5, %%edi \n\t" // edi = gtable
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//agi
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"leal (%%edi, %%ecx, 2), %%eax \n\t" // eax = >able[pixel.green]
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//agi
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"movw (%%eax), %%dx \n\t" // dx = gtable[pixel.green]
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"movw %%dx, %17 \n\t" // save gg
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"movzwl %22, %%ecx \n\t" // ecx = pixel.blue
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"movl %6, %%edi \n\t" // ebx = btable
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//agi
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"leal (%%edi, %%ecx, 2), %%eax \n\t" // eax = &btable[pixel.blue]
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//agi
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"movw (%%eax), %%dx \n\t" // dx = btable[pixel.blue]
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"movw %%dx, %18 \n\t" // save bb
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"movw $0, %19 \n\t" // save dummy aa
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"movq %16, %%mm1 \n\t" // load mm1 with rrggbbaa
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"pmullw %%mm6, %%mm1 \n\t" // mm1 = rr*dr|...
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"psubsw %%mm1, %%mm0 \n\t" // 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 %25, %%ebx \n\t" "movq %%mm0, %%mm1 \n\t" "pmullw %%mm5, %%mm1 \n\t" // mm1 = mm1*7
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"psrlw %%mm7, %%mm1 \n\t" // mm1 = mm1/16
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"paddw 8(%%ebx), %%mm1 \n\t" "movq %%mm1, 8(%%ebx) \n\t" // err[x+1,y] = rer*7/16
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"movl %24, %%ebx \n\t" "movq %%mm0, %%mm1 \n\t" "pmullw %%mm4, %%mm1 \n\t" // mm1 = mm1*5
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"psrlw %%mm7, %%mm1 \n\t" // mm1 = mm1/16
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"paddw -8(%%ebx), %%mm1 \n\t" "movq %%mm1, -8(%%ebx) \n\t" // err[x-1,y+1] += rer*3/16
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"movq %%mm0, %%mm1 \n\t" "pmullw %%mm3, %%mm1 \n\t" // mm1 = mm1*3
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"psrlw %%mm7, %%mm1 \n\t" // mm1 = mm1/16
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"paddw 8(%%ebx), %%mm1 \n\t" "movq %%mm1, (%%ebx) \n\t" // err[x,y+1] += rer*5/16
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"psrlw %%mm7, %%mm0 \n\t" // mm0 = mm0/16
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"movq %%mm0, 8(%%ebx) \n\t" // err[x+1,y+1] = rer/16
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// calculate final pixel value and store
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"movl %10, %%ecx \n\t" "movw %16, %%ax \n\t" "shlw %%cl, %%ax \n\t" //NP* ax = r<<roffs
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"movl %11, %%ecx \n\t" "movw %17, %%bx \n\t" "shlw %%cl, %%bx \n\t" //NP*
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"orw %%bx, %%ax \n\t" "movl %12, %%ecx \n\t" "movw %18, %%bx \n\t" "shlw %%cl, %%bx \n\t" //NP*
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"orw %%bx, %%ax \n\t" "movl %1, %%edx \n\t" "movw %%ax, (%%edx) \n\t" "addl $2, %%edx \n\t" // increment ximage
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"movl %%edx, %1 \n\t"
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// prepare for next iteration on X
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"addl $8, %24 \n\t" // nerr += 8
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"movl %25, %%ebx \n\t" "addl $8, %%ebx \n\t" "movl %%ebx, %25 \n\t" // 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\t" // image->data += 4
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"decl %26 \n\t" // x--
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"jnz .LoopXa \n\t" // if x>0, goto .LoopX
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// depend on edx
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"addl %15, %%edx \n\t" // add extra offset to ximage
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"movl %%edx, %1 \n\t" "jmp .LoopYa \n" ".Enda: \n\t" // THE END
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"emms \n\t" "popl %%ebx \n\t":: "m" (image), // %0
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"m"(ximage), // %1
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"m"(err), // %2
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"m"(nerr), // %3
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"m"(rtable), // %4
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"m"(gtable), // %5
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"m"(btable), // %6
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"m"(dr), // %7
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"m"(dg), // %8
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"m"(db), // %9
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"m"(roffs), // %10
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"m"(goffs), // %11
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"m"(boffs), // %12
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"m"(width), // %13
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"m"(height), // %14
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"m"(line_offset), // %15
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"m"(rrggbbaa.words.rr), // %16 (access to rr)
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"m"(rrggbbaa.words.gg), // %17 (access to gg)
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"m"(rrggbbaa.words.bb), // %18 (access to bb)
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"m"(rrggbbaa.words.aa), // %19 (access to aa)
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"m"(pixel.words.rr), // %20 (access to pixel.r)
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"m"(pixel.words.gg), // %21 (access to pixel.g)
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"m"(pixel.words.bb), // %22 (access to pixel.b)
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"m"(pixel.words.aa), // %23 (access to pixel.a)
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"m"(tmp_err), // %24
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"m"(tmp_nerr), // %25
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"m"(x) // %26
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:"eax", "ecx", "edx", "esi", "edi");
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asm volatile (
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"pushl %%ebx \n\t"
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/* pack dr, dg and db into mm6 */
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"movl %7, %%eax \n\t"
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"movl %8, %%ebx \n\t"
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"movl %9, %%ecx \n\t"
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"movw %%ax, %16 \n\t"
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"movw %%bx, %17 \n\t"
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"movw %%cx, %18 \n\t"
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"movw $0, %19 \n\t"
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"movq %16, %%mm6 \n\t" /* 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 \n\t"
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"movl $0x00040004, %18 \n\t"
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"movq %16, %%mm7 \n\t"
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/* store constant values for using with mmx when dithering */
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"movl $0x00070007, %16 \n\t"
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"movl $0x00070007, %18 \n\t"
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"movq %16, %%mm5 \n\t"
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"movl $0x00050005, %16 \n\t"
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"movl $0x00050005, %18 \n\t"
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"movq %16, %%mm4 \n\t"
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"movl $0x00030003, %16 \n\t"
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"movl $0x00030003, %18 \n\t"
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"movq %16, %%mm3 \n\t"
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/* process 1 pixel / cycle, each component treated as 16bit */
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"movl %0, %%esi \n\t" /* esi = image->data */
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".LoopYa: \n\t"
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"movl %13, %%eax \n\t"
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"movl %%eax, %26 \n\t" /* x = width */
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"movl %14, %%eax \n\t"
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"decl %%eax \n\t" /* y-- */
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"movl %%eax, %14 \n\t"
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"js .Enda \n\t" /* if y < 0, goto end */
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"andl $1, %%eax \n\t"
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"jz .LoopY_1a \n\t" /* if (y & 1) goto LoopY_1 */
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".LoopY_0a: \n\t"
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"movl %2, %%ebx \n\t" /* ebx = err */
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"movl %%ebx, %25 \n\t" /* [-36] = err */
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"movl %3, %%eax \n\t"
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"movl %%eax, %24 \n\t" /* [-32] = nerr */
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"jmp .LoopXa \n\t"
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".LoopY_1a: \n\t"
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"movl %3, %%ebx \n\t" /* ebx = nerr */
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"movl %%ebx, %25 \n\t" /* [-36] = nerr */
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"movl %2, %%eax \n\t"
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"movl %%eax, %24 \n\t" /* [-32] = eerr */
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".align 16 \n\t"
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".LoopXa: \n\t"
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/* calculate errors and pixel components; depend on ebx, esi, mm6 */
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"movq (%%ebx), %%mm1 \n\t" /* mm1 = error[0..3] */
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"punpcklbw (%%esi), %%mm0 \n\t" /* mm0 = image->data[0..3] */
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"psrlw $8, %%mm0 \n\t" /* fixup mm0 */
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"paddusb %%mm1, %%mm0 \n\t" /* mm0 = mm0 + mm1 (sat. to 255) */
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"movq %%mm0, %20 \n\t" /* save the pixel */
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"movzwl %20, %%ecx \n\t" /* ecx = pixel.red */
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"movl %4, %%edi \n\t" /* edi = rtable */
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/* agi */
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"leal (%%edi, %%ecx, 2), %%eax \n\t" /* eax = &rtable[pixel.red] */
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/* agi */
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"movw (%%eax), %%dx \n\t" /* dx = rtable[pixel.red] */
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"movw %%dx, %16 \n\t" /* save rr */
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"movzwl %21, %%ecx \n\t" /* ecx = pixel.green */
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"movl %5, %%edi \n\t" /* edi = gtable */
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/* agi */
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"leal (%%edi, %%ecx, 2), %%eax \n\t" /* eax = >able[pixel.green] */
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/* agi */
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"movw (%%eax), %%dx \n\t" /* dx = gtable[pixel.green] */
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"movw %%dx, %17 \n\t" /* save gg */
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"movzwl %22, %%ecx \n\t" /* ecx = pixel.blue */
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"movl %6, %%edi \n\t" /* ebx = btable */
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/* agi */
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"leal (%%edi, %%ecx, 2), %%eax \n\t" /* eax = &btable[pixel.blue] */
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/* agi */
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"movw (%%eax), %%dx \n\t" /* dx = btable[pixel.blue] */
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"movw %%dx, %18 \n\t" /* save bb */
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"movw $0, %19 \n\t" /* save dummy aa */
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"movq %16, %%mm1 \n\t" /* load mm1 with rrggbbaa */
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"pmullw %%mm6, %%mm1 \n\t" /* mm1 = rr*dr|... */
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"psubsw %%mm1, %%mm0 \n\t" /* error = pixel - mm1 */
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/* distribute the error; depend on mm0, mm7, mm3, mm4, mm5 */
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"movl %25, %%ebx \n\t"
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"movq %%mm0, %%mm1 \n\t"
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"pmullw %%mm5, %%mm1 \n\t" /* mm1 = mm1*7 */
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"psrlw %%mm7, %%mm1 \n\t" /* mm1 = mm1/16 */
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"paddw 8(%%ebx), %%mm1 \n\t"
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"movq %%mm1, 8(%%ebx) \n\t" /* err[x+1,y] = rer*7/16 */
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"movl %24, %%ebx \n\t"
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"movq %%mm0, %%mm1 \n\t"
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"pmullw %%mm4, %%mm1 \n\t" /* mm1 = mm1*5 */
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"psrlw %%mm7, %%mm1 \n\t" /* mm1 = mm1/16 */
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"paddw -8(%%ebx), %%mm1 \n\t"
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"movq %%mm1, -8(%%ebx) \n\t" /* err[x-1,y+1] += rer*3/16 */
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"movq %%mm0, %%mm1 \n\t"
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"pmullw %%mm3, %%mm1 \n\t" /* mm1 = mm1*3 */
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"psrlw %%mm7, %%mm1 \n\t" /* mm1 = mm1/16 */
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"paddw 8(%%ebx), %%mm1 \n\t"
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"movq %%mm1, (%%ebx) \n\t" /* err[x,y+1] += rer*5/16 */
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"psrlw %%mm7, %%mm0 \n\t" /* mm0 = mm0/16 */
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"movq %%mm0, 8(%%ebx) \n\t" /* err[x+1,y+1] = rer/16 */
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/* calculate final pixel value and store */
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"movl %10, %%ecx \n\t"
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"movw %16, %%ax \n\t"
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"shlw %%cl, %%ax \n\t" /* NP* ax = r<<roffs */
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"movl %11, %%ecx \n\t"
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"movw %17, %%bx \n\t"
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"shlw %%cl, %%bx \n\t" /* NP* */
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"orw %%bx, %%ax \n\t"
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"movl %12, %%ecx \n\t"
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"movw %18, %%bx \n\t"
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"shlw %%cl, %%bx \n\t" /* NP* */
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"orw %%bx, %%ax \n\t"
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"movl %1, %%edx \n\t"
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"movw %%ax, (%%edx) \n\t"
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"addl $2, %%edx \n\t" /* increment ximage */
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"movl %%edx, %1 \n\t"
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/* prepare for next iteration on X */
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"addl $8, %24 \n\t" /* nerr += 8 */
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"movl %25, %%ebx \n\t"
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"addl $8, %%ebx \n\t"
|
||||
"movl %%ebx, %25 \n\t" /* ebx = err += 8 */
|
||||
/* Note: in the last pixel, this would cause an invalid memory access
|
||||
* because, punpcklbw is used (which reads 8 bytes) and the last
|
||||
* pixel is only 4 bytes. This is no problem because the image data
|
||||
* was allocated with extra 4 bytes when created. */
|
||||
"addl $4, %%esi \n\t" /* image->data += 4 */
|
||||
"decl %26 \n\t" /* x-- */
|
||||
"jnz .LoopXa \n\t" /* if x>0, goto .LoopX */
|
||||
/* depend on edx */
|
||||
"addl %15, %%edx \n\t" /* add extra offset to ximage */
|
||||
"movl %%edx, %1 \n\t"
|
||||
"jmp .LoopYa \n\t"
|
||||
".Enda: \n\t" /* THE END */
|
||||
"emms \n\t"
|
||||
"popl %%ebx \n\t"
|
||||
:
|
||||
: "m" (image), /* %0 */
|
||||
"m" (ximage), /* %1 */
|
||||
"m" (err), /* %2 */
|
||||
"m" (nerr), /* %3 */
|
||||
"m" (rtable), /* %4 */
|
||||
"m" (gtable), /* %5 */
|
||||
"m" (btable), /* %6 */
|
||||
"m" (dr), /* %7 */
|
||||
"m" (dg), /* %8 */
|
||||
"m" (db), /* %9 */
|
||||
"m" (roffs), /* %10 */
|
||||
"m" (goffs), /* %11 */
|
||||
"m" (boffs), /* %12 */
|
||||
"m" (width), /* %13 */
|
||||
"m" (height), /* %14 */
|
||||
"m" (line_offset), /* %15 */
|
||||
"m" (rrggbbaa.words.rr), /* %16 (access to rr) */
|
||||
"m" (rrggbbaa.words.gg), /* %17 (access to gg) */
|
||||
"m" (rrggbbaa.words.bb), /* %18 (access to bb) */
|
||||
"m" (rrggbbaa.words.aa), /* %19 (access to aa) */
|
||||
"m" (pixel.words.rr), /* %20 (access to pixel.r) */
|
||||
"m" (pixel.words.gg), /* %21 (access to pixel.g) */
|
||||
"m" (pixel.words.bb), /* %22 (access to pixel.b) */
|
||||
"m" (pixel.words.aa), /* %23 (access to pixel.a) */
|
||||
"m" (tmp_err), /* %24 */
|
||||
"m" (tmp_nerr), /* %25 */
|
||||
"m" (x) /* %26 */
|
||||
: "eax",
|
||||
"ecx",
|
||||
"edx",
|
||||
"esi",
|
||||
"edi"
|
||||
);
|
||||
}
|
||||
|
||||
void
|
||||
@@ -250,67 +313,98 @@ x86_mmx_TrueColor_24_to_16(unsigned char *image,
|
||||
int w1;
|
||||
int w2;
|
||||
|
||||
asm volatile
|
||||
("pushl %%ebx \n\t" "movl %13, %%eax \n\t" // eax = width
|
||||
"movl %%eax, %%ebx \n\t" "shrl $2, %%eax \n\t" "movl %%eax, %27 \n\t" // w1 = width / 4
|
||||
"andl $3, %%ebx \n\t" "movl %%ebx, %28 \n" // w2 = width %% 4
|
||||
".LoopYc: \n\t" "movl %13, %%eax \n\t" "movl %%eax, %26 \n\t" // x = width
|
||||
"decl %14 \n\t" // height--
|
||||
"js .Endc \n\t" // if height < 0 then end
|
||||
"movl %14, %%eax \n\t" "decl %%eax \n\t" // y--
|
||||
"movl %%eax, %14 \n\t" "js .Endc \n\t" // if y < 0, goto end
|
||||
"andl $1, %%eax \n\t" "jz .LoopY_1c \n" // if (y&1) goto LoopY_1
|
||||
".LoopY_0c: \n\t" "movl %2, %%ebx \n\t" // ebx = err
|
||||
"movl %%ebx, %25 \n\t" // [-36] = err
|
||||
"movl %3, %%eax \n\t" //
|
||||
"movl %%eax, %24 \n\t" // [-32] = nerr
|
||||
"jmp .LoopX_1c \n" ".LoopY_1c: \n\t" "movl %3, %%ebx \n\t" // ebx = nerr
|
||||
"movl %%ebx, %25 \n\t" // [-36] = nerr
|
||||
"movl %2, %%eax \n\t" //
|
||||
"movl %%eax, %24 \n\t" // [-32] = eerr
|
||||
".align 16 \n\t" "movl %%eax, %26 \n" // x = w1
|
||||
".LoopX_1c: \n\t" "decl %26 \n\t" // x--
|
||||
"js .Xend1_c \n\t" // if x < 0 then end
|
||||
// do conversion of 4 pixels
|
||||
"movq %2, %%mm0 \n\t" // mm0 = err
|
||||
"jmp .LoopX_1c \n" ".Xend1_c: \n\t" "movl %28, %%eax \n\t" "movl %%eax, %26 \n" // x = w2
|
||||
".LoopX_2c: \n\t" "decl %26 \n\t" // x--
|
||||
"js .Xend2_c \n\t" //
|
||||
// do conversion
|
||||
"jmp .LoopX_2c \n" ".Xend2_c: \n\t" "movl %27, %%eax \n\t" "jmp .LoopYc \n" ".Endc: \n\t" // THE END
|
||||
"emms \n\t" "popl %%ebx \n\t":: "m" (image), // %0
|
||||
"m"(ximage), // %1
|
||||
"m"(err), // %2
|
||||
"m"(nerr), // %3
|
||||
"m"(rtable), // %4
|
||||
"m"(gtable), // %5
|
||||
"m"(btable), // %6
|
||||
"m"(dr), // %7
|
||||
"m"(dg), // %8
|
||||
"m"(db), // %9
|
||||
"m"(roffs), // %10
|
||||
"m"(goffs), // %11
|
||||
"m"(boffs), // %12
|
||||
"m"(width), // %13
|
||||
"m"(height), // %14
|
||||
"m"(line_offset), // %15
|
||||
"m"(rrggbbaa.words.rr), // %16 (access to rr)
|
||||
"m"(rrggbbaa.words.gg), // %17 (access to gg)
|
||||
"m"(rrggbbaa.words.bb), // %18 (access to bb)
|
||||
"m"(rrggbbaa.words.aa), // %19 (access to aa)
|
||||
"m"(pixel.words.rr), // %20 (access to pixel.r)
|
||||
"m"(pixel.words.gg), // %21 (access to pixel.g)
|
||||
"m"(pixel.words.bb), // %22 (access to pixel.b)
|
||||
"m"(pixel.words.aa), // %23 (access to pixel.a)
|
||||
"m"(tmp_err), // %24
|
||||
"m"(tmp_nerr), // %25
|
||||
"m"(x), // %26
|
||||
"m"(w1), // %27
|
||||
"m"(w2) // %28
|
||||
:"eax", "ecx", "edx", "esi", "edi");
|
||||
asm volatile (
|
||||
"pushl %%ebx \n\t"
|
||||
"movl %13, %%eax \n\t" /* eax = width */
|
||||
"movl %%eax, %%ebx \n\t"
|
||||
"shrl $2, %%eax \n\t"
|
||||
"movl %%eax, %27 \n\t" /* w1 = width / 4 */
|
||||
"andl $3, %%ebx \n\t"
|
||||
"movl %%ebx, %28 \n\t" /* w2 = width %% 4 */
|
||||
".LoopYc: \n\t"
|
||||
"movl %13, %%eax \n\t"
|
||||
"movl %%eax, %26 \n\t" /* x = width */
|
||||
"decl %14 \n\t" /* height-- */
|
||||
"js .Endc \n\t" /* if height < 0 then end */
|
||||
"movl %14, %%eax \n\t"
|
||||
"decl %%eax \n\t" /* y-- */
|
||||
"movl %%eax, %14 \n\t"
|
||||
"js .Endc \n\t" /* if y < 0, goto end */
|
||||
"andl $1, %%eax \n\t"
|
||||
"jz .LoopY_1c \n\t" /* if (y&1) goto LoopY_1 */
|
||||
".LoopY_0c: \n\t"
|
||||
"movl %2, %%ebx \n\t" /* ebx = err */
|
||||
"movl %%ebx, %25 \n\t" /* [-36] = err */
|
||||
"movl %3, %%eax \n\t"
|
||||
"movl %%eax, %24 \n\t" /* [-32] = nerr */
|
||||
"jmp .LoopX_1c \n\t"
|
||||
".LoopY_1c: \n\t"
|
||||
"movl %3, %%ebx \n\t" /* ebx = nerr */
|
||||
"movl %%ebx, %25 \n\t" /* [-36] = nerr */
|
||||
"movl %2, %%eax \n\t"
|
||||
"movl %%eax, %24 \n\t" /* [-32] = eerr */
|
||||
".align 16 \n\t"
|
||||
"movl %%eax, %26 \n\t" /* x = w1 */
|
||||
".LoopX_1c: \n\t"
|
||||
"decl %26 \n\t" /* x-- */
|
||||
"js .Xend1_c \n\t" /* if x < 0 then end */
|
||||
/* do conversion of 4 pixels */
|
||||
"movq %2, %%mm0 \n\t" /* mm0 = err */
|
||||
"jmp .LoopX_1c \n\t"
|
||||
".Xend1_c: \n\t"
|
||||
"movl %28, %%eax \n\t"
|
||||
"movl %%eax, %26 \n\t" /* x = w2 */
|
||||
".LoopX_2c: \n\t"
|
||||
"decl %26 \n\t" /* x-- */
|
||||
"js .Xend2_c \n\t"
|
||||
/* do conversion */
|
||||
"jmp .LoopX_2c \n\t"
|
||||
".Xend2_c: \n\t"
|
||||
"movl %27, %%eax \n\t"
|
||||
"jmp .LoopYc \n\t"
|
||||
".Endc: \n\t" /* THE END */
|
||||
"emms \n\t"
|
||||
"popl %%ebx \n\t"
|
||||
:
|
||||
: "m" (image), /* %0 */
|
||||
"m" (ximage), /* %1 */
|
||||
"m" (err), /* %2 */
|
||||
"m" (nerr), /* %3 */
|
||||
"m" (rtable), /* %4 */
|
||||
"m" (gtable), /* %5 */
|
||||
"m" (btable), /* %6 */
|
||||
"m" (dr), /* %7 */
|
||||
"m" (dg), /* %8 */
|
||||
"m" (db), /* %9 */
|
||||
"m" (roffs), /* %10 */
|
||||
"m" (goffs), /* %11 */
|
||||
"m" (boffs), /* %12 */
|
||||
"m" (width), /* %13 */
|
||||
"m" (height), /* %14 */
|
||||
"m" (line_offset), /* %15 */
|
||||
"m" (rrggbbaa.words.rr), /* %16 (access to rr) */
|
||||
"m" (rrggbbaa.words.gg), /* %17 (access to gg) */
|
||||
"m" (rrggbbaa.words.bb), /* %18 (access to bb) */
|
||||
"m" (rrggbbaa.words.aa), /* %19 (access to aa) */
|
||||
"m" (pixel.words.rr), /* %20 (access to pixel.r) */
|
||||
"m" (pixel.words.gg), /* %21 (access to pixel.g) */
|
||||
"m" (pixel.words.bb), /* %22 (access to pixel.b) */
|
||||
"m" (pixel.words.aa), /* %23 (access to pixel.a) */
|
||||
"m" (tmp_err), /* %24 */
|
||||
"m" (tmp_nerr), /* %25 */
|
||||
"m" (x), /* %26 */
|
||||
"m" (w1), /* %27 */
|
||||
"m" (w2) /* %28 */
|
||||
:
|
||||
"eax",
|
||||
"ecx",
|
||||
"edx",
|
||||
"esi",
|
||||
"edi"
|
||||
);
|
||||
}
|
||||
|
||||
#endif /* ASM_X86_MMX */
|
||||
#endif /* ASM_X86_MMX */
|
||||
|
||||
void
|
||||
x86_PseudoColor_32_to_8(unsigned char *image,
|
||||
@@ -337,175 +431,199 @@ x86_PseudoColor_32_to_8(unsigned char *image,
|
||||
char ndg; // aparently not used
|
||||
char ndb; // aparently not used
|
||||
|
||||
asm volatile
|
||||
("pushal \n\t" "movl %9, %%eax \n\t" "mulb %9 \n\t" "movl %%eax, %15 \n\t" // cpcpc = cpc*cpc
|
||||
// eax will always be <= 0xffff
|
||||
// process 1 pixel / cycle, each component treated as 16bit
|
||||
"movl %0, %%esi \n" // esi = image->data
|
||||
".LoopYb: \n\t" "movl %10, %%ecx \n\t" "movl %%ecx, %14 \n\t" // x = width
|
||||
"movl %11, %%ecx \n\t" "decl %%ecx \n\t" // y--
|
||||
"movl %%ecx, %11 \n\t" "js .Endb \n\t" // if y < 0, goto end
|
||||
"andl $1, %%ecx \n\t" "jz .LoopY_1b \n" // if (y&1) goto LoopY_1
|
||||
".LoopY_0b: \n\t" "movl %2, %%ebx \n\t" // ebx = err
|
||||
//useless "movl %%ebx, %20 \n\t" // [-36] = err
|
||||
"movl %3, %%ecx \n\t" //
|
||||
"movl %%ecx, %19 \n\t" // [-32] = nerr
|
||||
"movl $0, (%%ecx) \n\t" // init error of nerr[0] to 0
|
||||
"jmp .LoopXb \n" ".LoopY_1b: \n\t" "movl %3, %%ebx \n\t" // ebx = nerr
|
||||
//useless "movl %%ebx, %20 \n\t" // [-36] = nerr
|
||||
"movl %2, %%ecx \n\t" //
|
||||
"movl %%ecx, %19 \n\t" // [-32] = err
|
||||
"movl $0, (%%ecx) \n\t" // init error of nerr[0] to 0
|
||||
".align 16 \n" ".LoopXb: \n\t" "movl %4, %%edi \n\t" // edi = ctable
|
||||
"xorl %%edx, %%edx \n\t" // zero the upper word on edx
|
||||
// RED
|
||||
// depends on ebx==err, esi==image->data, edi
|
||||
"movzbw (%%esi), %%dx \n\t" // dx = image->data[0]
|
||||
"movsbw (%%ebx), %%ax \n\t" // ax = error[0]
|
||||
"addw %%ax, %%dx \n\t" // pixel.red = data[0] + error[0]
|
||||
"testb %%dh, %%dh \n\t" // test if pixel.red < 0 or > 255
|
||||
"jz .OKRb \n\t" // 0 <= pixel.red <= 255
|
||||
"js .NEGRb \n\t" // pixel.red < 0
|
||||
"movw $0xff, %%dx \n\t" // pixel.red > 255
|
||||
"jmp .OKRb \n"
|
||||
".NEGRb: \n\t"
|
||||
"xorw %%dx, %%dx \n" ".OKRb: \n\t"
|
||||
//partial reg
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" // ecx = &ctable[pixel.red]
|
||||
//agi
|
||||
"movl (%%ecx), %%eax \n\t" // ax = ctable[pixel.red]
|
||||
"movw %%ax, %16 \n\t" // save rr
|
||||
"mulb %5 \n\t" // ax = rr*dr
|
||||
"subw %%ax, %%dx \n\t" // rer = dx = dx - rr*dr
|
||||
"movswl %%dx, %%eax \n\t" // save rer
|
||||
// distribute error
|
||||
"leal (, %%eax, 8), %%ecx \n\t" "subw %%dx, %%cx \n\t" // cx = rer * 7
|
||||
"sarw $4, %%cx \n\t" // cx = rer * 7 / 16
|
||||
"addb %%cl, 4(%%ebx) \n\t" // err[x+1] += rer * 7 / 16
|
||||
"movl %19, %%ecx \n\t" // ecx = nerr
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" // dx = rer * 5
|
||||
"sarw $4, %%dx \n\t" // dx = rer * 5 / 16
|
||||
"addb %%dl, (%%ecx) \n\t" // nerr[x] += rer * 5 / 16
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" // dx = rer * 3
|
||||
"sarw $4, %%dx \n\t" // dx = rer * 3 / 16
|
||||
"addb %%dl, -4(%%ecx) \n\t" // nerr[x-1] += rer * 3 / 16
|
||||
"sarw $4, %%ax \n\t" // ax = rer / 16
|
||||
"movb %%al, 4(%%ecx) \n\t" // nerr[x+1] = rer / 16
|
||||
// GREEN
|
||||
// depends on ebx, esi, edi
|
||||
"movzbw 1(%%esi), %%dx \n\t" // dx = image->data[1]
|
||||
"movsbw 1(%%ebx), %%ax \n\t" // ax = error[1]
|
||||
"addw %%ax, %%dx \n\t" // pixel.grn = data[1] + error[1]
|
||||
"testb %%dh, %%dh \n\t" // test if pixel.grn < 0 or > 255
|
||||
"jz .OKGb \n\t" // 0 <= pixel.grn <= 255
|
||||
"js .NEGGb \n\t" // pixel.grn < 0
|
||||
"movw $0xff, %%dx \n\t" // pixel.grn > 255
|
||||
"jmp .OKGb \n"
|
||||
".NEGGb: \n\t"
|
||||
"xorw %%dx, %%dx \n" ".OKGb: \n\t"
|
||||
// partial reg
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" // ecx = &ctable[pixel.grn]
|
||||
//agi
|
||||
"movw (%%ecx), %%ax \n\t" // ax = ctable[pixel.grn]
|
||||
"movw %%ax, %17 \n\t" // save gg
|
||||
"mulb %6 \n\t" // ax = gg*dg
|
||||
"subw %%ax, %%dx \n\t" // ger = dx = dx - gg*dg
|
||||
"movswl %%dx, %%eax \n\t" // save ger
|
||||
// distribute error
|
||||
"leal (, %%eax, 8), %%ecx \n\t" "subw %%dx, %%cx \n\t" // cx = ger * 7
|
||||
"sarw $4, %%cx \n\t" // cx = ger * 7 / 16
|
||||
"addb %%cl, 5(%%ebx) \n\t" // err[x+1] += ger * 7 / 16
|
||||
"movl %19, %%ecx \n\t" // ecx = nerr
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" // dx = ger * 5
|
||||
"sarw $4, %%dx \n\t" // dx = ger * 5 / 16
|
||||
"addb %%dl, 1(%%ecx) \n\t" // nerr[x] += ger * 5 / 16
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" // dx = ger * 3
|
||||
"sarw $4, %%dx \n\t" // dx = ger * 3 / 16
|
||||
"addb %%dl, -3(%%ecx) \n\t" // nerr[x-1] += ger * 3 / 16
|
||||
"sarw $4, %%ax \n\t" // ax = ger / 16
|
||||
"movb %%al, 5(%%ecx) \n\t" // nerr[x+1] = ger / 16
|
||||
// BLUE
|
||||
// depends on ebx, esi
|
||||
"movzbw 2(%%esi), %%dx \n\t" // dx = image->data[2]
|
||||
"movsbw 2(%%ebx), %%ax \n\t" // ax = error[2]
|
||||
"addw %%ax, %%dx \n\t" // pixel.grn = data[2] + error[2]
|
||||
"testb %%dh, %%dh \n\t" // test if pixel.blu < 0 or > 255
|
||||
"jz .OKBb \n\t" // 0 <= pixel.blu <= 255
|
||||
"js .NEGBb \n\t" // pixel.blu < 0
|
||||
"movw $0xff, %%dx \n\t" // pixel.blu > 255
|
||||
"jmp .OKBb \n"
|
||||
".NEGBb: \n\t"
|
||||
"xorw %%dx, %%dx \n" ".OKBb: \n\t"
|
||||
//partial reg
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" // ecx = &ctable[pixel.blu]
|
||||
//agi
|
||||
"movw (%%ecx), %%ax \n\t" // ax = ctable[pixel.blu]
|
||||
"movw %%ax, %18 \n\t" // save bb
|
||||
"mulb %7 \n\t" // ax = bb*db
|
||||
"subw %%ax, %%dx \n\t" // ber = dx = dx - bb*db
|
||||
"movswl %%dx, %%eax \n\t" // save ber
|
||||
// distribute error
|
||||
"leal (, %%eax, 8), %%ecx \n\t" "subw %%dx, %%cx \n\t" // cx = ber * 7
|
||||
"sarw $4, %%cx \n\t" // cx = ber * 7 / 16
|
||||
"addb %%cl, 6(%%ebx) \n\t" // err[x+1] += ber * 7 / 16
|
||||
"movl %19, %%ecx \n\t" // ecx = nerr
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" // dx = ber * 5
|
||||
"sarw $4, %%dx \n\t" // dx = ber * 5 / 16
|
||||
"addb %%dl, 2(%%ecx) \n\t" // nerr[x] += ber * 5 / 16
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" // dx = ber * 3
|
||||
"sarw $4, %%dx \n\t" // dx = ber * 3 / 16
|
||||
"addb %%dl, -4(%%ecx) \n\t" // nerr[x-1] += ber * 3 / 16
|
||||
"sarw $4, %%ax \n\t" // ax = ber / 16
|
||||
"movb %%al, 6(%%ecx) \n\t" // nerr[x+1] = ber / 16
|
||||
"andl $0xffff, %%eax \n\t"
|
||||
// depends on eax & 0xffff0000 == 0
|
||||
// calculate the index of the value of the pixel
|
||||
"movw %16, %%ax \n\t" // ax = rr
|
||||
"mulb %15 \n\t" // ax = cpcpc*rr
|
||||
"movw %%ax, %%cx \n\t" "movw %17, %%ax \n\t" // ax = gg
|
||||
"mulb %9 \n\t" // ax = cpc*gg
|
||||
"addw %%cx, %%ax \n\t" // ax = cpc*gg + cpcpc*rr
|
||||
"addw %18, %%ax \n\t" // ax = cpcpc*rr + cpc*gg + bb
|
||||
"movl %8, %%ecx \n\t"
|
||||
//agi
|
||||
"leal (%%ecx, %%eax, 4), %%edx \n\t"
|
||||
//agi
|
||||
"movb (%%edx), %%cl \n\t" // cl = pixels[ax]
|
||||
// store the pixel
|
||||
"movl %1, %%eax \n\t" "movb %%cl, (%%eax) \n\t" // *ximage = cl
|
||||
"incl %1 \n\t" // ximage++
|
||||
// prepare for next iteration on X
|
||||
"addl $4, %19 \n\t" // nerr += 4
|
||||
"addl $4, %%ebx \n\t" // err += 4
|
||||
"addl %12, %%esi \n\t" // image->data += bpp
|
||||
"decl %14 \n\t" // x--
|
||||
"jnz .LoopXb \n\t" // if x>0, goto .LoopX
|
||||
"movl %13, %%eax \n\t" "addl %%eax, %1 \n\t" // add extra offset to ximage
|
||||
"jmp .LoopYb \n" ".Endb: \n\t" "emms \n\t" "popal \n\t":: "m" (image), // %0
|
||||
"m"(ximage), // %1
|
||||
"m"(err), // %2
|
||||
"m"(nerr), // %3
|
||||
"m"(ctable), // %4
|
||||
"m"(dr), // %5
|
||||
"m"(dg), // %6
|
||||
"m"(db), // %7
|
||||
"m"(pixels), // %8
|
||||
"m"(cpc), // %9
|
||||
"m"(width), // %10
|
||||
"m"(height), // %11
|
||||
"m"(bytesPerPixel), // %12
|
||||
"m"(line_offset), // %13
|
||||
"m"(x), // %14
|
||||
"m"(cpcpc), // %15
|
||||
"m"(rr), // %16
|
||||
"m"(gg), // %17
|
||||
"m"(bb), // %18
|
||||
"m"(tmp_err), // %19
|
||||
"m"(tmp_nerr), // %20
|
||||
"m"(ndr), // %21
|
||||
"m"(ndg), // %22
|
||||
"m"(ndb) // %23
|
||||
);
|
||||
asm volatile (
|
||||
"pushal \n\t"
|
||||
"movl %9, %%eax \n\t"
|
||||
"mulb %9 \n\t"
|
||||
"movl %%eax, %15 \n\t" /* cpcpc = cpc * cpc */
|
||||
/* eax will always be <= 0xffff */
|
||||
/* process 1 pixel / cycle, each component treated as 16bit */
|
||||
"movl %0, %%esi \n\t" /* esi = image->data */
|
||||
".LoopYb: \n\t"
|
||||
"movl %10, %%ecx \n\t"
|
||||
"movl %%ecx, %14 \n\t" /* x = width */
|
||||
"movl %11, %%ecx \n\t"
|
||||
"decl %%ecx \n\t" /* y-- */
|
||||
"movl %%ecx, %11 \n\t"
|
||||
"js .Endb \n\t" /* if y < 0, goto end */
|
||||
"andl $1, %%ecx \n\t"
|
||||
"jz .LoopY_1b \n\t" /* if (y & 1) goto LoopY_1 */
|
||||
".LoopY_0b: \n\t"
|
||||
"movl %2, %%ebx \n\t" /* ebx = err */
|
||||
/* "movl %%ebx, %20 \n\t" */ /* [-36] = err */ /* useless */
|
||||
"movl %3, %%ecx \n\t"
|
||||
"movl %%ecx, %19 \n\t" /* [-32] = nerr */
|
||||
"movl $0, (%%ecx) \n\t" /* init error of nerr[0] to 0 */
|
||||
"jmp .LoopXb \n\t"
|
||||
".LoopY_1b: \n\t"
|
||||
"movl %3, %%ebx \n\t" /* ebx = nerr */
|
||||
/* "movl %%ebx, %20 \n\t" */ /* [-36] = nerr */ /* useless */
|
||||
"movl %2, %%ecx \n\t"
|
||||
"movl %%ecx, %19 \n\t" /* [-32] = err */
|
||||
"movl $0, (%%ecx) \n\t" /* init error of nerr[0] to 0 */
|
||||
".align 16 \n\t"
|
||||
".LoopXb: \n\t"
|
||||
"movl %4, %%edi \n\t" /* edi = ctable */
|
||||
"xorl %%edx, %%edx \n\t" /* zero the upper word on edx */
|
||||
/* RED; depends on ebx==err, esi==image->data, edi */
|
||||
"movzbw (%%esi), %%dx \n\t" /* dx = image->data[0] */
|
||||
"movsbw (%%ebx), %%ax \n\t" /* ax = error[0] */
|
||||
"addw %%ax, %%dx \n\t" /* pixel.red = data[0] + error[0] */
|
||||
"testb %%dh, %%dh \n\t" /* test if pixel.red < 0 or > 255 */
|
||||
"jz .OKRb \n\t" /* 0 <= pixel.red <= 255 */
|
||||
"js .NEGRb \n\t" /* pixel.red < 0 */
|
||||
"movw $0xff, %%dx \n\t" /* pixel.red > 255 */
|
||||
"jmp .OKRb \n\t"
|
||||
".NEGRb: \n\t"
|
||||
"xorw %%dx, %%dx \n\t"
|
||||
".OKRb: \n\t"
|
||||
/* partial reg */
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" /* ecx = &ctable[pixel.red] */
|
||||
/* agi */
|
||||
"movl (%%ecx), %%eax \n\t" /* ax = ctable[pixel.red] */
|
||||
"movw %%ax, %16 \n\t" /* save rr */
|
||||
"mulb %5 \n\t" /* ax = rr*dr */
|
||||
"subw %%ax, %%dx \n\t" /* rer = dx = dx - rr*dr */
|
||||
"movswl %%dx, %%eax \n\t" /* save rer */
|
||||
/* distribute error */
|
||||
"leal (, %%eax, 8), %%ecx \n\t"
|
||||
"subw %%dx, %%cx \n\t" /* cx = rer * 7 */
|
||||
"sarw $4, %%cx \n\t" /* cx = rer * 7 / 16 */
|
||||
"addb %%cl, 4(%%ebx) \n\t" /* err[x+1] += rer * 7 / 16 */
|
||||
"movl %19, %%ecx \n\t" /* ecx = nerr */
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" /* dx = rer * 5 */
|
||||
"sarw $4, %%dx \n\t" /* dx = rer * 5 / 16 */
|
||||
"addb %%dl, (%%ecx) \n\t" /* nerr[x] += rer * 5 / 16 */
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" /* dx = rer * 3 */
|
||||
"sarw $4, %%dx \n\t" /* dx = rer * 3 / 16 */
|
||||
"addb %%dl, -4(%%ecx) \n\t" /* nerr[x-1] += rer * 3 / 16 */
|
||||
"sarw $4, %%ax \n\t" /* ax = rer / 16 */
|
||||
"movb %%al, 4(%%ecx) \n\t" /* nerr[x+1] = rer / 16 */
|
||||
/* GREEN; depends on ebx, esi, edi */
|
||||
"movzbw 1(%%esi), %%dx \n\t" /* dx = image->data[1] */
|
||||
"movsbw 1(%%ebx), %%ax \n\t" /* ax = error[1] */
|
||||
"addw %%ax, %%dx \n\t" /* pixel.grn = data[1] + error[1] */
|
||||
"testb %%dh, %%dh \n\t" /* test if pixel.grn < 0 or > 255 */
|
||||
"jz .OKGb \n\t" /* 0 <= pixel.grn <= 255 */
|
||||
"js .NEGGb \n\t" /* pixel.grn < 0 */
|
||||
"movw $0xff, %%dx \n\t" /* pixel.grn > 255 */
|
||||
"jmp .OKGb \n\t"
|
||||
".NEGGb: \n\t"
|
||||
"xorw %%dx, %%dx \n\t"
|
||||
".OKGb: \n\t"
|
||||
/* partial reg */
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" /* ecx = &ctable[pixel.grn] */
|
||||
/* agi */
|
||||
"movw (%%ecx), %%ax \n\t" /* ax = ctable[pixel.grn] */
|
||||
"movw %%ax, %17 \n\t" /* save gg */
|
||||
"mulb %6 \n\t" /* ax = gg*dg */
|
||||
"subw %%ax, %%dx \n\t" /* ger = dx = dx - gg*dg */
|
||||
"movswl %%dx, %%eax \n\t" /* save ger */
|
||||
/* distribute error */
|
||||
"leal (, %%eax, 8), %%ecx \n\t"
|
||||
"subw %%dx, %%cx \n\t" /* cx = ger * 7 */
|
||||
"sarw $4, %%cx \n\t" /* cx = ger * 7 / 16 */
|
||||
"addb %%cl, 5(%%ebx) \n\t" /* err[x+1] += ger * 7 / 16 */
|
||||
"movl %19, %%ecx \n\t" /* ecx = nerr */
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" /* dx = ger * 5 */
|
||||
"sarw $4, %%dx \n\t" /* dx = ger * 5 / 16 */
|
||||
"addb %%dl, 1(%%ecx) \n\t" /* nerr[x] += ger * 5 / 16 */
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" /* dx = ger * 3 */
|
||||
"sarw $4, %%dx \n\t" /* dx = ger * 3 / 16 */
|
||||
"addb %%dl, -3(%%ecx) \n\t" /* nerr[x-1] += ger * 3 / 16 */
|
||||
"sarw $4, %%ax \n\t" /* ax = ger / 16 */
|
||||
"movb %%al, 5(%%ecx) \n\t" /* nerr[x+1] = ger / 16 */
|
||||
/* BLUE; depends on ebx, esi */
|
||||
"movzbw 2(%%esi), %%dx \n\t" /* dx = image->data[2] */
|
||||
"movsbw 2(%%ebx), %%ax \n\t" /* ax = error[2] */
|
||||
"addw %%ax, %%dx \n\t" /* pixel.grn = data[2] + error[2] */
|
||||
"testb %%dh, %%dh \n\t" /* test if pixel.blu < 0 or > 255 */
|
||||
"jz .OKBb \n\t" /* 0 <= pixel.blu <= 255 */
|
||||
"js .NEGBb \n\t" /* pixel.blu < 0 */
|
||||
"movw $0xff, %%dx \n\t" /* pixel.blu > 255 */
|
||||
"jmp .OKBb \n\t"
|
||||
".NEGBb: \n\t"
|
||||
"xorw %%dx, %%dx \n\t"
|
||||
".OKBb: \n\t"
|
||||
/* partial reg */
|
||||
"leal (%%edi, %%edx, 2), %%ecx \n\t" /* ecx = &ctable[pixel.blu] */
|
||||
/* agi */
|
||||
"movw (%%ecx), %%ax \n\t" /* ax = ctable[pixel.blu] */
|
||||
"movw %%ax, %18 \n\t" /* save bb */
|
||||
"mulb %7 \n\t" /* ax = bb*db */
|
||||
"subw %%ax, %%dx \n\t" /* ber = dx = dx - bb*db */
|
||||
"movswl %%dx, %%eax \n\t" /* save ber */
|
||||
/* distribute error */
|
||||
"leal (, %%eax, 8), %%ecx \n\t"
|
||||
"subw %%dx, %%cx \n\t" /* cx = ber * 7 */
|
||||
"sarw $4, %%cx \n\t" /* cx = ber * 7 / 16 */
|
||||
"addb %%cl, 6(%%ebx) \n\t" /* err[x+1] += ber * 7 / 16 */
|
||||
"movl %19, %%ecx \n\t" /* ecx = nerr */
|
||||
"leaw (%%eax, %%eax, 4), %%dx \n\t" /* dx = ber * 5 */
|
||||
"sarw $4, %%dx \n\t" /* dx = ber * 5 / 16 */
|
||||
"addb %%dl, 2(%%ecx) \n\t" /* nerr[x] += ber * 5 / 16 */
|
||||
"leaw (%%eax, %%eax, 2), %%dx \n\t" /* dx = ber * 3 */
|
||||
"sarw $4, %%dx \n\t" /* dx = ber * 3 / 16 */
|
||||
"addb %%dl, -4(%%ecx) \n\t" /* nerr[x-1] += ber * 3 / 16 */
|
||||
"sarw $4, %%ax \n\t" /* ax = ber / 16 */
|
||||
"movb %%al, 6(%%ecx) \n\t" /* nerr[x+1] = ber / 16 */
|
||||
"andl $0xffff, %%eax \n\t"
|
||||
/* depends on eax & 0xffff0000 == 0
|
||||
* calculate the index of the value of the pixel */
|
||||
"movw %16, %%ax \n\t" /* ax = rr */
|
||||
"mulb %15 \n\t" /* ax = cpcpc*rr */
|
||||
"movw %%ax, %%cx \n\t"
|
||||
"movw %17, %%ax \n\t" /* ax = gg */
|
||||
"mulb %9 \n\t" /* ax = cpc*gg */
|
||||
"addw %%cx, %%ax \n\t" /* ax = cpc*gg + cpcpc*rr */
|
||||
"addw %18, %%ax \n\t" /* ax = cpcpc*rr + cpc*gg + bb */
|
||||
"movl %8, %%ecx \n\t"
|
||||
/* agi */
|
||||
"leal (%%ecx, %%eax, 4), %%edx \n\t"
|
||||
/* agi */
|
||||
"movb (%%edx), %%cl \n\t" /* cl = pixels[ax] */
|
||||
/* store the pixel */
|
||||
"movl %1, %%eax \n\t"
|
||||
"movb %%cl, (%%eax) \n\t" /* *ximage = cl */
|
||||
"incl %1 \n\t" /* ximage++ */
|
||||
/* prepare for next iteration on X */
|
||||
"addl $4, %19 \n\t" /* nerr += 4 */
|
||||
"addl $4, %%ebx \n\t" /* err += 4 */
|
||||
"addl %12, %%esi \n\t" /* image->data += bpp */
|
||||
"decl %14 \n\t" /* x-- */
|
||||
"jnz .LoopXb \n\t" /* if x>0, goto .LoopX */
|
||||
"movl %13, %%eax \n\t"
|
||||
"addl %%eax, %1 \n\t" /* add extra offset to ximage */
|
||||
"jmp .LoopYb \n\t"
|
||||
".Endb: \n\t"
|
||||
"emms \n\t"
|
||||
"popal \n\t"
|
||||
:
|
||||
: "m" (image), /* %0 */
|
||||
"m" (ximage), /* %1 */
|
||||
"m" (err), /* %2 */
|
||||
"m" (nerr), /* %3 */
|
||||
"m" (ctable), /* %4 */
|
||||
"m" (dr), /* %5 */
|
||||
"m" (dg), /* %6 */
|
||||
"m" (db), /* %7 */
|
||||
"m" (pixels), /* %8 */
|
||||
"m" (cpc), /* %9 */
|
||||
"m" (width), /* %10 */
|
||||
"m" (height), /* %11 */
|
||||
"m" (bytesPerPixel), /* %12 */
|
||||
"m" (line_offset), /* %13 */
|
||||
"m" (x), /* %14 */
|
||||
"m" (cpcpc), /* %15 */
|
||||
"m" (rr), /* %16 */
|
||||
"m" (gg), /* %17 */
|
||||
"m" (bb), /* %18 */
|
||||
"m" (tmp_err), /* %19 */
|
||||
"m" (tmp_nerr), /* %20 */
|
||||
"m" (ndr), /* %21 */
|
||||
"m" (ndg), /* %22 */
|
||||
"m" (ndb) /* %23 */
|
||||
);
|
||||
}
|
||||
|
||||
#endif /* ASM_X86 */
|
||||
#endif /* ASM_X86 */
|
||||
|
||||
Reference in New Issue
Block a user