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Rewrote timer code.

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The new code is based on timestamps, rather than delays. This eliminates the
need to update every timer in timer_process(), which cost a non-trivial amount
of CPU time on low-end machines.

This involved changes to every user of the timer code, so this change almost
certainly introduces bugs.
This commit is contained in:
SarahW 2018-08-02 22:06:10 +01:00
commit a7d006b637
79 changed files with 1050 additions and 1033 deletions
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14
src/vid_svga.c
View file

@ -433,8 +433,8 @@ void svga_recalctimings(svga_t *svga)
_dispontime *= crtcconst;
_dispofftime *= crtcconst;
svga->dispontime = (int)(_dispontime * (1 << TIMER_SHIFT));
svga->dispofftime = (int)(_dispofftime * (1 << TIMER_SHIFT));
svga->dispontime = (uint64_t)_dispontime;
svga->dispofftime = (uint64_t)_dispofftime;
/* printf("SVGA horiz total %i display end %i vidclock %f\n",svga->crtc[0],svga->crtc[1],svga->clock);
printf("SVGA vert total %i display end %i max row %i vsync %i\n",svga->vtotal,svga->dispend,(svga->crtc[9]&31)+1,svga->vsyncstart);
printf("total %f on %i cycles off %i cycles frame %i sec %i %02X\n",disptime*crtcconst,svga->dispontime,svga->dispofftime,(svga->dispontime+svga->dispofftime)*svga->vtotal,(svga->dispontime+svga->dispofftime)*svga->vtotal*70,svga->seqregs[1]);
@ -478,7 +478,7 @@ void svga_poll(void *p)
svga->overlay_oddeven = 1;
}
svga->vidtime += svga->dispofftime;
timer_advance_u64(&svga->timer, svga->dispofftime);
// if (output) printf("Display off %f\n",vidtime);
svga->cgastat |= 1;
svga->linepos = 1;
@ -540,7 +540,7 @@ void svga_poll(void *p)
else
{
// pclog("VC %i ma %05X\n", svga->vc, svga->ma);
svga->vidtime += svga->dispontime;
timer_advance_u64(&svga->timer, svga->dispontime);
// if (output) printf("Display on %f\n",vidtime);
if (svga->dispon)
@ -730,8 +730,8 @@ int svga_init(svga_t *svga, void *p, int memsize,
svga->crtc[0] = 63;
svga->crtc[6] = 255;
svga->dispontime = 1000 * (1 << TIMER_SHIFT);
svga->dispofftime = 1000 * (1 << TIMER_SHIFT);
svga->dispontime = 1000ull << 32;
svga->dispofftime = 1000ull << 32;
svga->bpp = 8;
svga->vram = malloc(memsize);
svga->vram_max = memsize;
@ -749,7 +749,7 @@ int svga_init(svga_t *svga, void *p, int memsize,
mem_mapping_add(&svga->mapping, 0xa0000, 0x20000, svga_read, svga_readw, svga_readl, svga_write, svga_writew, svga_writel, NULL, MEM_MAPPING_EXTERNAL, svga);
timer_add(svga_poll, &svga->vidtime, TIMER_ALWAYS_ENABLED, svga);
timer_add(&svga->timer, svga_poll, svga, 1);
svga_pri = svga;