71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#ifndef _BITMAP_H
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#define _BITMAP_H
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#ifndef NO_ASM
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#ifdef __WATCOMC__
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void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count );
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#pragma aux decode_data_asm parm [esi] [ecx] [edi] [ebx] modify exact [esi edi eax ebx ecx] = \
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"again_ddn:" \
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"xor eax,eax" \
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"mov al,[esi]" \
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"inc dword ptr [ebx+eax*4]" \
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"mov al,[edi+eax]" \
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"mov [esi],al" \
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"inc esi" \
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"dec ecx" \
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"jne again_ddn"
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#elif defined __GNUC__
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static inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count ) {
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int dummy[4];
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__asm__ __volatile__ (
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"xorl %%eax,%%eax;"
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"0:;"
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"movb (%%esi), %%al;"
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"incl (%%ebx, %%eax, 4);"
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"movb (%%edi, %%eax), %%al;"
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"movb %%al, (%%esi);"
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"incl %%esi;"
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"decl %%ecx;"
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"jne 0b"
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: "=S" (dummy[0]), "=c" (dummy[1]), "=D" (dummy[2]), "=b" (dummy[3])
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: "0" (data), "1" (num_pixels), "2" (colormap), "3" (count)
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: "%eax");
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}
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#elif defined _MSC_VER
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__inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count )
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{
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__asm {
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mov esi,[data]
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mov ecx,[num_pixels]
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mov edi,[colormap]
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mov ebx,[count]
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again_ddn:
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xor eax,eax
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mov al,[esi]
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inc dword ptr [ebx+eax*4]
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mov al,[edi+eax]
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mov [esi],al
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inc esi
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dec ecx
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jne again_ddn
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}
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}
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#else
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#define NO_ASM 1 // We really do want no assembler...
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#endif
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#endif
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#ifdef NO_ASM
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static void decode_data_asm(ubyte *data, int num_pixels, ubyte *colormap, int *count)
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{
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int i;
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for (i = 0; i < num_pixels; i++) {
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count[*data]++;
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*data = colormap[*data];
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data++;
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}
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}
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#endif
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#endif
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