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add some CPU read cycles (#233)

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* add some CPU read cycles

* more

* more

* more

* use scissor region for rdp interrupt calc
This commit is contained in:
Logan McNaughton
2025-02-09 17:34:29 +01:00
committed by GitHub
parent 99511b7cc6
commit 1c168c4bcd
13 changed files with 35 additions and 54 deletions
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parallel-rdp/interface.cpp
+13 -39
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@@ -62,6 +62,7 @@ static int cmd_cur;
static int cmd_ptr;
static bool emu_running;
static GFX_INFO gfx_info;
static uint32_t region;
static const unsigned cmd_len_lut[64] = {
1,
@@ -330,34 +331,6 @@ bool rdp_update_screen()
return emu_running;
}
static uint32_t viCalculateHorizonalWidth(uint32_t hstart, uint32_t xscale)
{
uint32_t start = (hstart >> 16) & 0x3FF;
uint32_t end = (hstart & 0x3FF);
uint32_t delta;
if (end > start)
delta = end - start;
else
delta = 0;
uint32_t scale = (xscale & 0xFFF);
return (delta * scale) / 0x400;
}
static uint32_t viCalculateVerticalHeight(uint32_t vstart, uint32_t yscale)
{
uint32_t start = (vstart >> 16) & 0x3FF;
uint32_t end = (vstart & 0x3FF);
uint32_t delta;
if (end > start)
delta = end - start;
else
delta = 0;
uint32_t scale = (yscale & 0xFFF);
return (delta * scale) / 0x800;
}
uint64_t rdp_process_commands()
{
uint64_t interrupt_timer = 0;
@@ -406,6 +379,7 @@ uint64_t rdp_process_commands()
while (cmd_cur - cmd_ptr < 0)
{
uint32_t w1 = cmd_data[2 * cmd_cur];
uint32_t w2 = cmd_data[2 * cmd_cur + 1];
uint32_t command = (w1 >> 24) & 63;
int cmd_length = cmd_len_lut[command];
@@ -418,21 +392,21 @@ uint64_t rdp_process_commands()
if (command >= 8)
processor->enqueue_command(cmd_length * 2, &cmd_data[2 * cmd_cur]);
if (RDP::Op(command) == RDP::Op::SetScissor)
{
uint32_t upper_left_x = ((w1 >> 12) & 0xFFF) >> 2;
uint32_t upper_left_y = (w1 & 0xFFF) >> 2;
uint32_t lower_right_x = ((w2 >> 12) & 0xFFF) >> 2;
uint32_t lower_right_y = (w2 & 0xFFF) >> 2;
region = (lower_right_x - upper_left_x) * (lower_right_y - upper_left_y);
}
if (RDP::Op(command) == RDP::Op::SyncFull)
{
processor->wait_for_timeline(processor->signal_timeline());
uint32_t width = viCalculateHorizonalWidth(*gfx_info.VI_H_START_REG, *gfx_info.VI_X_SCALE_REG);
if (width == 0)
{
width = 320;
}
uint32_t height = viCalculateVerticalHeight(*gfx_info.VI_V_START_REG, *gfx_info.VI_Y_SCALE_REG);
if (height == 0)
{
height = 240;
}
interrupt_timer = width * height;
interrupt_timer = region;
if (interrupt_timer == 0)
interrupt_timer = 5000;
}
cmd_cur += cmd_length;