/* x86_convert.c - convert RImage to XImage with x86 optimizations * * Raster graphics library * * Copyright (c) 2000 Alfredo K. Kojima * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #ifdef ASM_X86_MMX int x86_check_mmx() { static int result = 1; if (result >= 0) return result; result = 0; #if 0 asm volatile ("pushfl \n" // check whether cpuid supported "pop %%eax \n" "movl %%eax, %%ebx \n" "xorl 1<<21, %%eax \n" "pushfl %%eax \n" "popfd \n" "pushfl \n" "popl %%eax \n" "xorl %%eax, %%ebx \n" "andl 1<<21, %%eax \n" "jz .NotPentium \n" "xorl %%eax, %%eax \n" "movl $1, %%eax \n" "cpuid \n" "test 1<<23, %%edx \n" "jz .NotMMX \n" "movl $1, %%0 \n" ".NotMMX: \n" ".Bye: \n" ".NotPentium: \n" : "=rm" (result)); #endif return result; } void x86_TrueColor_32_to_16(unsigned char *image, // 8 unsigned short *ximage, // 12 short *err, // 16 short *nerr, // 20 short *rtable, // 24 short *gtable, // 28 short *btable, // 32 int dr, // 36 int dg, // 40 int db, // 44 unsigned int roffs, // 48 unsigned int goffs, // 52 unsigned int boffs, // 56 int width, // 60 int height, // 64 int line_offset) // 68 { /* int x; //-4 long long rrggbbaa;// -16 long long pixel; //-24 short *tmp_err; //-32 short *tmp_nerr; //-36 */ asm volatile ( "subl $64, %esp \n" // alloc some more stack "pusha \n" // pack dr, dg and db into mm6 "movl 36(%ebp), %eax \n" "movl 40(%ebp), %ebx \n" "movw %ax, -16(%ebp) \n" "movw %bx, -14(%ebp) \n" "movl 44(%ebp), %eax \n" "movw $0, -10(%ebp) \n" "movw %ax, -12(%ebp) \n" "movq -16(%ebp), %mm6 \n" // dr dg db 0 // pack 4|4|4|4 into mm7, for shifting (/16) "movl $0x00040004, -16(%ebp) \n" "movl $0x00040004, -12(%ebp) \n" "movq -16(%ebp), %mm7 \n" // store constant values for using with mmx when dithering "movl $0x00070007, -16(%ebp) \n" "movl $0x00070007, -12(%ebp) \n" "movq -16(%ebp), %mm5 \n" "movl $0x00050005, -16(%ebp) \n" "movl $0x00050005, -12(%ebp) \n" "movq -16(%ebp), %mm4 \n" "movl $0x00030003, -16(%ebp) \n" "movl $0x00030003, -12(%ebp) \n" "movq -16(%ebp), %mm3 \n" // process 1 pixel / cycle, each component treated as 16bit "movl 8(%ebp), %esi \n" // esi = image->data ".LoopY: \n" "movl 60(%ebp), %eax \n" "movl %eax, -4(%ebp) \n" // x = width "movl 64(%ebp), %eax \n" "decl %eax \n" // y-- "movl %eax, 64(%ebp) \n" "js .End \n" // if y < 0, goto end "andl $1, %eax \n" "jz .LoopY_1 \n" // if (y&1) goto LoopY_1 ".LoopY_0: \n" "movl 16(%ebp), %ebx \n" // ebx = err "movl %ebx, -36(%ebp) \n" // [-36] = err "movl 20(%ebp), %eax \n" // "movl %eax, -32(%ebp) \n" // [-32] = nerr "jmp .LoopX \n" ".LoopY_1: \n" "movl 20(%ebp), %ebx \n" // ebx = nerr "movl %ebx, -36(%ebp) \n" // [-36] = nerr "movl 16(%ebp), %eax \n" // "movl %eax, -32(%ebp) \n" // [-32] = eerr ".LoopX: \n" // calculate errors and pixel components // depend on ebx, esi, mm6 "movq (%ebx), %mm1 \n" // mm1 = error[0..3] "punpcklbw (%esi), %mm0 \n" // mm0 = image->data[0..3] "psrlw $8, %mm0 \n" // fixup mm0 "paddusb %mm1, %mm0 \n" // mm0 = mm0 + mm1 (sat. to 255) "movq %mm0, -24(%ebp) \n" // save the pixel "movzwl -24(%ebp), %ecx \n" // ecx = pixel.red "movl 24(%ebp), %edi \n" // edi = rtable "leal (%edi, %ecx, 2), %eax \n" // eax = &rtable[pixel.red] "movl (%eax), %edx \n" // edx = rtable[pixel.red] "movw %dx, -16(%ebp) \n" // save rr "movzwl -22(%ebp), %ecx \n" // ecx = pixel.green "movl 28(%ebp), %edi \n" // edi = gtable "leal (%edi, %ecx, 2), %eax \n" // eax = >able[pixel.green] "movl (%eax), %edx \n" // ebx = gtable[pixel.green] "movw %dx, -14(%ebp) \n" // save gg "movzwl -20(%ebp), %ecx \n" // ecx = pixel.blue "movl 32(%ebp), %edi \n" // ebx = btable "leal (%edi, %ecx, 2), %eax \n" // eax = &btable[pixel.blue] "movl (%eax), %edx \n" // ecx = btable[pixel.blue] "movw %dx, -12(%ebp) \n" // save bb "movw $0, -10(%ebp) \n" // save dummy aa "movq -16(%ebp), %mm1 \n" // load mm1 with rrggbbaa "pmullw %mm6, %mm1 \n" // mm1 = rr*dr|... "psubsw %mm1, %mm0 \n" // error = pixel - mm1 // distribute the error // depend on mm0, mm7, mm3, mm4, mm5 "movl -36(%ebp), %ebx \n" "movq %mm0, %mm1 \n" "pmullw %mm5, %mm1 \n" // mm1 = mm1*7 "psrlw %mm7, %mm1 \n" // mm1 = mm1/16 "paddw 8(%ebx), %mm1 \n" "movq %mm1, 8(%ebx) \n" // err[x+1,y] = rer*7/16 "movl -32(%ebp), %ebx \n" "movq %mm0, %mm1 \n" "pmullw %mm4, %mm1 \n" // mm1 = mm1*5 "psrlw %mm7, %mm1 \n" // mm1 = mm1/16 "paddw -8(%ebx), %mm1 \n" "movq %mm1, -8(%ebx) \n" // err[x-1,y+1] += rer*3/16 "movq %mm0, %mm1 \n" "pmullw %mm3, %mm1 \n" // mm1 = mm1*3 "psrlw %mm7, %mm1 \n" // mm1 = mm1/16 "paddw 8(%ebx), %mm1 \n" "movq %mm1, (%ebx) \n" // err[x,y+1] += rer*5/16 "psrlw %mm7, %mm0 \n" // mm0 = mm0/16 "movq %mm0, 8(%ebx) \n" // err[x+1,y+1] = rer/16 // calculate final pixel value and store "movl 48(%ebp), %ecx \n" "movw -16(%ebp), %ax \n" "shlw %cl, %ax \n" //NP* ax = r<data += 4 "decl -4(%ebp) \n" // x-- "jnz .LoopX \n" // if x>0, goto .LoopX // depend on edx "addl 68(%ebp), %edx \n" // add extra offset to ximage "movl %edx, 12(%ebp) \n" "jmp .LoopY \n" ".End: \n" // THE END "emms \n" "popa \n" ); } #endif /* ASM_X86_MMX */