313 lines
7.4 KiB
C
313 lines
7.4 KiB
C
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <vga.h>
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#include <vgagl.h>
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/* #define LINEAR_ADDRESSING */
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int VGAMODE, USEGL;
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GraphicsContext *physicalscreen;
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GraphicsContext *backscreen;
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void screen1(void)
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{
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int x, y;
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for (y = 0; y < HEIGHT; y++)
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for (x = 0; x < WIDTH; x++)
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/* limited RGB palette in 256-color modes */
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/* some color information is not used in */
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/* 15-bit color modes */
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gl_setpixelrgb(x, y,
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x * 256 / WIDTH,
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255 - x * 256 / WIDTH,
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y * 256 / HEIGHT);
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}
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void configure(void)
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{
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int allowed[GLASTMODE + 1];
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for (;;) {
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int i;
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int m;
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for (i = G320x200x16; i <= GLASTMODE; i++) {
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allowed[i] = 0;
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if (vga_hasmode(i)) {
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printf("%2d %s\n", i, vga_getmodename(i));
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allowed[i] = 1;
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}
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}
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printf("\nWhich mode? ");
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scanf("%d", &m);
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getchar();
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printf("\n");
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if (m >= G320x200x16 && m <= GLASTMODE) {
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VGAMODE = m;
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if (vga_getmodeinfo(m)->bytesperpixel >= 1)
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USEGL = 1;
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else
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USEGL = 0;
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break;
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}
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}
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vga_setmode(VGAMODE);
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#ifdef LINEAR_ADDRESSING
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vga_setlinearaddressing();
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#endif
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if (USEGL) {
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gl_setcontextvga(VGAMODE);
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physicalscreen = gl_allocatecontext();
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gl_getcontext(physicalscreen);
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}
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}
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void blit(void)
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{
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gl_clearscreen(0x86);
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vga_imageblt(vga_getgraphmem(), 0, WIDTH - 128, HEIGHT - 128,
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WIDTH * BYTESPERPIXEL);
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/* vga_bitblt(0, 100 * WIDTH * BYTESPERPIXEL, 50, 50, WIDTH * BYTESPERPIXEL);
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vga_fillblt(100 * BYTESPERPIXEL, 50, 50, WIDTH * BYTESPERPIXEL, 0x86);
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*/
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}
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#if 0
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/* May help on well-designed motherboards. */
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/* IT DOES MAKE A DIFFERENCE! REP STOSL IS SLOWER */
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/* (CL-GD5434 VLB zero-wait writes -- 2/3 cycles); rep stos takes 4 */
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#if 1
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static inline void *
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__memset(void *s, char c, size_t count)
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{
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__asm__(
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"cld\n\t"
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"cmpl $12,%%edx\n\t"
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"jl 1f\n\t" /* if (count >= 12) */
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"movzbl %%al,%%ax\n\t"
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"movl %%eax,%%ecx\n\t"
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"shll $8,%%ecx\n\t" /* c |= c << 8 */
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"orl %%ecx,%%eax\n\t"
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"movl %%eax,%%ecx\n\t"
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"shll $16,%%ecx\n\t" /* c |= c << 16 */
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"orl %%ecx,%%eax\n\t"
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"movl %%edx,%%ecx\n\t"
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"negl %%ecx\n\t"
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"andl $3,%%ecx\n\t" /* (-s % 4) */
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"subl %%ecx,%%edx\n\t" /* count -= (-s % 4) */
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"rep ; stosb\n\t" /* align to longword boundary */
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"movl %%edx,%%ecx\n\t"
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"shrl $2,%%ecx\n\t"
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"cmpl $32,%%ecx\n\t" /* do loop unrolling for */
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"jl 2f\n\t" /* chunks of 128 bytes */
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"jmp 3f\n\t"
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".align 4,0x90\n\t"
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"3:\n\t"
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"movl %%eax,(%%edi)\n\t"
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"movl %%eax,4(%%edi)\n\t"
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"movl %%eax,8(%%edi)\n\t"
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"movl %%eax,12(%%edi)\n\t"
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"movl %%eax,16(%%edi)\n\t"
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"movl %%eax,20(%%edi)\n\t"
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"movl %%eax,24(%%edi)\n\t"
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"movl %%eax,28(%%edi)\n\t"
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"movl %%eax,32(%%edi)\n\t"
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"movl %%eax,36(%%edi)\n\t"
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"movl %%eax,40(%%edi)\n\t"
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"movl %%eax,44(%%edi)\n\t"
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"movl %%eax,48(%%edi)\n\t"
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"movl %%eax,52(%%edi)\n\t"
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"movl %%eax,56(%%edi)\n\t"
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"movl %%eax,60(%%edi)\n\t"
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"movl %%eax,64(%%edi)\n\t"
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"movl %%eax,68(%%edi)\n\t"
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"movl %%eax,72(%%edi)\n\t"
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"movl %%eax,76(%%edi)\n\t"
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"movl %%eax,80(%%edi)\n\t"
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"movl %%eax,84(%%edi)\n\t"
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"movl %%eax,88(%%edi)\n\t"
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"movl %%eax,92(%%edi)\n\t"
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"movl %%eax,96(%%edi)\n\t"
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"movl %%eax,100(%%edi)\n\t"
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"movl %%eax,104(%%edi)\n\t"
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"movl %%eax,108(%%edi)\n\t"
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"subl $32,%%ecx\n\t"
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"movl %%eax,112(%%edi)\n\t"
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"movl %%eax,116(%%edi)\n\t"
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"movl %%eax,120(%%edi)\n\t"
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"movl %%eax,124(%%edi)\n\t"
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"addl $128,%%edi\n\t"
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"cmpl $32,%%ecx\n\t"
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"jge 3b\n\t"
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"2:\n\t"
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"rep ; stosl\n\t" /* fill remaining longwords */
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"andl $3,%%edx\n" /* fill last few bytes */
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"1:\tmovl %%edx,%%ecx\n\t" /* <= 12 entry point */
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"rep ; stosb\n\t"
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: : "a"(c), "D"(s), "d"(count)
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: "ax", "cx", "dx", "di");
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return s;
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}
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#else /* 8-bit writes. */
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static inline void *
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__memset(void *s, char c, size_t count)
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{
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__asm__(
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"cld\n\t"
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"cmpl $12,%%edx\n\t"
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"jl 1f\n\t" /* if (count >= 12) */
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"movzbl %%al,%%ax\n\t"
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"movl %%eax,%%ecx\n\t"
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"shll $8,%%ecx\n\t" /* c |= c << 8 */
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"orl %%ecx,%%eax\n\t"
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"movl %%eax,%%ecx\n\t"
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"shll $16,%%ecx\n\t" /* c |= c << 16 */
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"orl %%ecx,%%eax\n\t"
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"movl %%edx,%%ecx\n\t"
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"negl %%ecx\n\t"
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"andl $3,%%ecx\n\t" /* (-s % 4) */
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"subl %%ecx,%%edx\n\t" /* count -= (-s % 4) */
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"rep ; stosb\n\t" /* align to longword boundary */
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"movl %%edx,%%ecx\n\t"
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"shrl $2,%%ecx\n\t"
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"cmpl $32,%%ecx\n\t" /* do loop unrolling for */
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"jl 2f\n\t" /* chunks of 128 bytes */
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"jmp 3f\n\t"
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".align 4,0x90\n\t"
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"3:\n\t"
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"movb %%al,(%%edi)\n\t"
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"movb %%al,1(%%edi)\n\t"
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"movb %%al,2(%%edi)\n\t"
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"movl %%al,3(%%edi)\n\t"
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"movl %%al,4(%%edi)\n\t"
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"movl %%al,5(%%edi)\n\t"
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"movl %%al,6(%%edi)\n\t"
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"movl %%al,7(%%edi)\n\t"
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"movl %%al,8(%%edi)\n\t"
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"movl %%al,9(%%edi)\n\t"
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"movl %%al,10(%%edi)\n\t"
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"movl %%al,11(%%edi)\n\t"
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"movl %%al,12(%%edi)\n\t"
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"movl %%al,13(%%edi)\n\t"
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"movl %%al,14(%%edi)\n\t"
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"movl %%al,15(%%edi)\n\t"
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"movl %%al,16(%%edi)\n\t"
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"movl %%al,17(%%edi)\n\t"
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"movl %%al,18(%%edi)\n\t"
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"movl %%al,19(%%edi)\n\t"
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"movl %%al,20(%%edi)\n\t"
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"movl %%al,21(%%edi)\n\t"
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"movl %%al,22(%%edi)\n\t"
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"movl %%al,23(%%edi)\n\t"
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"movl %%al,24(%%edi)\n\t"
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"movl %%al,25(%%edi)\n\t"
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"movl %%al,26(%%edi)\n\t"
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"movl %%al,27(%%edi)\n\t"
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"movl %%al,28(%%edi)\n\t"
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"subl $8,%%ecx\n\t"
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"movl %%al,29(%%edi)\n\t"
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"movl %%al,30(%%edi)\n\t"
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"movl %%al,31(%%edi)\n\t"
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"addl $32,%%edi\n\t"
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"cmpl $8,%%ecx\n\t"
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"jge 3b\n\t"
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"2:\n\t"
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"rep ; stosl\n\t" /* fill remaining longwords */
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"andl $3,%%edx\n" /* fill last few bytes */
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"1:\tmovl %%edx,%%ecx\n\t" /* <= 12 entry point */
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"rep ; stosb\n\t"
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: : "a"(c), "D"(s), "d"(count)
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: "ax", "cx", "dx", "di");
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return s;
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}
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#endif
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#define memset __memset
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#endif
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void speed(void)
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{
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int i;
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int start_clock;
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int finish_clock;
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int diff_clock;
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unsigned char *vgabase = vga_getgraphmem();
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#ifndef LINEAR_ADDRESSING
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if (VGAMODE >= G640x480x256)
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vga_setpage(0);
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#endif
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start_clock = clock();
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for (i = 0; i < 5000; i++) {
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memset(vgabase, i & 255, 65536);
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}
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finish_clock = clock();
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diff_clock = (finish_clock - start_clock)*10/CLOCKS_PER_SEC;
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printf("Timing: %3d.%1ds, %dK/s\n", diff_clock / 10,
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(diff_clock % 10) , 64*5000*10 / diff_clock);
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}
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int main(void)
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{
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vga_init();
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printf("This is a video memory speed tester. Note that the first "
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"screen doesn't test\nanything (nor does the 3 second pause "
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"that follows).\n\n");
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configure();
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if (COLORS == 256)
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gl_setrgbpalette(); /* set RGB palette */
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if (USEGL)
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screen1();
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sleep(2);
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/* vga_screenoff(); */
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speed();
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vga_setmode(TEXT);
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exit(0);
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}
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