mirror/86Box
1
0
Fork 0
mirror of https://github.com/86Box/86Box.git synced 2026-02-22 01:25:33 -07:00
Code Issues Packages Projects Releases Activity

Merge pull request #6651 from AITUS95/master

Browse Source 
S3 ViRGE: Add cycle timing to MMIO read functions to fix polling performance issue
This commit is contained in:
Miran Grča
2025-12-30 21:52:41 +01:00
committed by GitHub
parent b1756b250f 61918e4d72
commit df76d4a1c5
1 changed files with 10 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/video/vid_s3_virge.c
View File

@@ -24,6 +24,7 @@
#include <stdatomic.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include "cpu.h"
#include <86box/io.h>
#include <86box/timer.h>
#include <86box/dma.h>
@@ -1191,6 +1192,9 @@ s3_virge_mmio_read(uint32_t addr, void *priv)
virge_t *virge = (virge_t *) priv;
uint8_t ret;
/* Add wait states for MMIO reads to prevent excessive polling */
cycles -= virge->svga.monitor->mon_video_timing_read_b;
switch (addr & 0xffff) {
case 0x8504:
if (!virge->virge_busy)
@@ -1242,6 +1246,9 @@ s3_virge_mmio_read_w(uint32_t addr, void *priv)
virge_t *virge = (virge_t *) priv;
uint16_t ret;
/* Add wait states for MMIO reads to prevent excessive polling */
cycles -= virge->svga.monitor->mon_video_timing_read_w;
switch (addr & 0xfffe) {
case 0x8504:
ret = 0xc000;
@@ -1275,6 +1282,9 @@ s3_virge_mmio_read_l(uint32_t addr, void *priv)
virge_t *virge = (virge_t *) priv;
uint32_t ret = 0xffffffff;
/* Add wait states for MMIO reads to prevent excessive polling */
cycles -= virge->svga.monitor->mon_video_timing_read_l;
switch (addr & 0xfffc) {
case 0x8180:
ret = virge->streams.pri_ctrl;