mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-28 10:59:16 -04:00
Matthew Stanley
95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
#include "cpu_state.h"
|
|
#include "psx_icache.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
int g_ls_replay_active = 0;
|
|
static uint64_t test_cycles = 0;
|
|
|
|
void psx_advance_cycles(uint32_t cycles) { test_cycles += cycles; }
|
|
|
|
static int expect(int condition, const char *message) {
|
|
if (condition) return 1;
|
|
fprintf(stderr, "FAIL: %s\n", message);
|
|
return 0;
|
|
}
|
|
|
|
int main(void) {
|
|
CPUState cpu;
|
|
memset(&cpu, 0, sizeof(cpu));
|
|
|
|
psx_icache_reset();
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
cpu.read_absorb_which = 1;
|
|
cpu.read_absorb[0] = 77u;
|
|
cpu.read_absorb[1] = 99u;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
if (!expect(test_cycles == 7u, "word-0 cold refill cost")) return 1;
|
|
if (!expect(cpu.read_absorb_which == 0u && cpu.read_absorb[1] == 0u &&
|
|
cpu.read_absorb[0] == 77u,
|
|
"true miss clears only the selected load give-back")) return 1;
|
|
cpu.read_absorb_which = 1;
|
|
cpu.read_absorb[1] = 55u;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
psx_icache_fetch_interp(&cpu, 0x80010004u);
|
|
if (!expect(test_cycles == 7u, "steady tag hits are cycle-free")) return 1;
|
|
if (!expect(cpu.read_absorb_which == 1u && cpu.read_absorb[1] == 55u,
|
|
"tag hits preserve load give-back")) return 1;
|
|
|
|
psx_icache_reset();
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
psx_icache_fetch_interp(&cpu, 0x80010008u);
|
|
if (!expect(test_cycles == 5u, "word-2 partial refill cost")) return 1;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
if (!expect(test_cycles == 12u, "earlier word remains invalid after partial refill")) return 1;
|
|
|
|
psx_icache_reset();
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
psx_icache_fetch_interp(&cpu, 0xA0010000u);
|
|
psx_icache_fetch_interp(&cpu, 0xA0010000u);
|
|
if (!expect(test_cycles == 8u, "KSEG1 remains uncached")) return 1;
|
|
|
|
psx_icache_reset();
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
psx_icache_fetch_interp(&cpu, 0x00010000u);
|
|
if (!expect(test_cycles == 14u,
|
|
"KUSEG/KSEG0 aliases replace full virtual tags")) return 1;
|
|
psx_icache_reset();
|
|
if (!expect(g_psx_icache_tv[0] == 1u,
|
|
"reset makes a warmed line cold")) return 1;
|
|
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
psx_icache_fetch(&cpu, 0x80010000u);
|
|
if (!expect(test_cycles == 7u,
|
|
"compiled-code compatibility wrapper preserves refill")) return 1;
|
|
|
|
psx_icache_reset();
|
|
g_psx_icache_active = 1;
|
|
test_cycles = 0;
|
|
g_ls_replay_active = 1;
|
|
cpu.read_absorb_which = 1;
|
|
cpu.read_absorb[1] = 44u;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
g_ls_replay_active = 0;
|
|
if (!expect(test_cycles == 0u, "lockstep replay does not mutate cache")) return 1;
|
|
if (!expect(g_psx_icache_tv[0] == 1u, "replay preserved cold tag")) return 1;
|
|
if (!expect(cpu.read_absorb_which == 1u && cpu.read_absorb[1] == 44u,
|
|
"replay preserves load give-back")) return 1;
|
|
|
|
g_psx_icache_active = 0;
|
|
psx_icache_fetch_interp(&cpu, 0x80010000u);
|
|
if (!expect(test_cycles == 0u, "disabled cache model is free")) return 1;
|
|
if (!expect(cpu.read_absorb_which == 1u && cpu.read_absorb[1] == 44u,
|
|
"disabled cache preserves load give-back")) return 1;
|
|
|
|
puts("PASS: interpreter I-cache hit path preserves miss/refill semantics");
|
|
return 0;
|
|
}
|