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atirage: Move fb_pitch calculation.

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This commit is contained in:
joevt 2024-02-26 02:35:38 -08:00 committed by dingusdev
parent 3036f4676d
commit 3797fdbf1b
2 changed files with 30 additions and 15 deletions
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44
devices/video/atirage.cpp
View File

@ -275,6 +275,17 @@ uint32_t ATIRage::read_reg(uint32_t reg_offset, uint32_t size) {
return static_cast<uint32_t>(result);
}
#define WRITE_VALUE_AND_LOG(level) \
do { \
this->regs[reg_num] = new_value; \
if (reg_num != ATI_CRTC_INT_CNTL) { \
LOG_F(level, "%s: write %s %04x.%c = %0*x = %08x", this->name.c_str(), \
get_reg_name(reg_num), reg_offset, SIZE_ARG(size), size * 2, \
(uint32_t)extract_bits<uint64_t>(value, offset * 8, size * 8), new_value \
); \
} \
} while (0)
void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
uint32_t reg_num = reg_offset >> 2;
uint32_t offset = reg_offset & 3;
@ -301,11 +312,9 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
break;
case ATI_CRTC_OFF_PITCH:
new_value = value;
if (old_value != new_value) {
this->regs[reg_num] = new_value;
this->crtc_update();
}
break;
WRITE_VALUE_AND_LOG(9);
this->crtc_update();
return;
case ATI_CRTC_INT_CNTL: {
uint32_t bits_read_only =
(1 << ATI_CRTC_VBLANK) |
@ -503,7 +512,7 @@ void ATIRage::write_reg(uint32_t reg_offset, uint32_t value, uint32_t size) {
break;
}
this->regs[reg_num] = new_value;
WRITE_VALUE_AND_LOG(9);
}
bool ATIRage::io_access_allowed(uint32_t offset) {
@ -699,6 +708,21 @@ void ATIRage::crtc_update() {
need_recalc = true;
}
static uint8_t bits_per_pixel[8] = {0, 4, 8, 16, 16, 24, 32, 0};
int new_fb_pitch = extract_bits<uint32_t>(this->regs[ATI_CRTC_OFF_PITCH],
ATI_CRTC_PITCH, ATI_CRTC_PITCH_size) * bits_per_pixel[this->pixel_format];
if (new_fb_pitch != this->fb_pitch) {
this->fb_pitch = new_fb_pitch;
need_recalc = true;
}
uint8_t* new_fb_ptr = &this->vram_ptr[extract_bits<uint32_t>(this->regs[ATI_CRTC_OFF_PITCH],
ATI_CRTC_OFFSET, ATI_CRTC_OFFSET_size) * 8];
if (new_fb_ptr != this->fb_ptr) {
this->fb_ptr = new_fb_ptr;
need_recalc = true;
}
// look up which VPLL ouput is requested
int clock_sel = extract_bits<uint32_t>(this->regs[ATI_CLOCK_CNTL], ATI_CLOCK_SEL,
ATI_CLOCK_SEL_size);
@ -781,14 +805,6 @@ void ATIRage::crtc_update() {
LOG_F(ERROR, "%s: unsupported pixel format %d", this->name.c_str(), this->pixel_format);
}
static uint8_t bits_per_pixel[8] = {0, 4, 8, 16, 16, 24, 32, 0};
this->fb_pitch = extract_bits<uint32_t>(this->regs[ATI_CRTC_OFF_PITCH],
ATI_CRTC_PITCH, ATI_CRTC_PITCH_size) * (bits_per_pixel[this->pixel_format & 7] * 8) >> 3;
this->fb_ptr = &this->vram_ptr[extract_bits<uint32_t>(this->regs[ATI_CRTC_OFF_PITCH],
ATI_CRTC_OFFSET, ATI_CRTC_OFFSET_size) * 8];
LOG_F(INFO, "%s: primary CRT controller enabled:", this->name.c_str());
LOG_F(INFO, "Video mode: %s",
bit_set(this->regs[ATI_CRTC_GEN_CNTL], ATI_CRTC_EXT_DISP_EN) ? "extended" : "VGA");

1
devices/video/atirage128.cpp
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@ -1 +0,0 @@