mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
60 lines
2.5 KiB
Python
60 lines
2.5 KiB
Python
"""Execute the actual ADDI/ADDIU bodies with isolated widescreen services."""
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from pathlib import Path
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import subprocess
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import sys
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import tempfile
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source = (Path(__file__).resolve().parents[1] / 'src/dirty_ram_interp.c').read_text(encoding='utf-8')
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start = source.index(' case 0x08: /* ADDI rt, rs, simm')
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end = source.index(' case 0x0A: /* SLTI */', start)
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cases = source[start:end]
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fixture = r'''
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#include <assert.h>
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#include <stdint.h>
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#include <string.h>
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typedef struct { uint32_t gpr[32]; } CPUState;
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static int margin;
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static int psx_ws_activation_margin(void) { return margin; }
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static int psx_ws_is_cull_bias_site(uint32_t pc) { return pc == 4; }
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static int psx_ws_is_cull_bias_lower_site(uint32_t pc) { return pc == 8; }
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static int psx_ws_angle_site(uint32_t pc, uint32_t insn, uint32_t *out) { return 0; }
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static int psx_ws_is_signed_x_bound_site(uint32_t pc, uint32_t insn) { return 0; }
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static int psx_ws_screen_x_bound(int imm) { assert(0); return imm; }
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#define psx_pgxp_alu(...) ((void)0)
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static int execute(CPUState *cpu, uint32_t pc, uint32_t insn) {
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unsigned rs = (insn >> 21) & 31, rt = (insn >> 16) & 31;
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int32_t simm = (int16_t)insn;
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switch (insn >> 26) {
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@CASES@
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default: assert(0); return 1;
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}
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}
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int main(void) {
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const int margins[] = {0, 85, 138, 234};
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const uint32_t cameras[] = {0, 51, 1024, 0xffff, 0xffffffff};
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for (unsigned op = 8; op <= 9; op++)
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for (unsigned m = 0; m < 4; m++)
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for (unsigned c = 0; c < 5; c++)
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for (unsigned kind = 0; kind < 3; kind++) {
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CPUState cpu, expected;
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for (unsigned r = 0; r < 32; r++) cpu.gpr[r] = r * 7919;
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cpu.gpr[4] = cameras[c];
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expected = cpu;
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margin = margins[m];
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int imm = kind == 1 ? 368 : -48;
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expected.gpr[2] = cameras[c] + (uint32_t)imm;
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if (kind == 1) expected.gpr[2] += margin;
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if (kind == 2) expected.gpr[2] -= margin;
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assert(execute(&cpu, kind * 4, (op << 26) | (4 << 21) | (2 << 16) | (uint16_t)imm) == 0);
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assert(memcmp(&cpu, &expected, sizeof cpu) == 0);
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}
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return 0;
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}
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'''.replace('@CASES@', cases)
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with tempfile.TemporaryDirectory(prefix='ws-activation-') as directory:
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path = Path(directory)
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(path / 'test.c').write_text(fixture, encoding='utf-8')
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subprocess.run([sys.argv[1], '-std=c99', str(path / 'test.c'), '-o', str(path / 'test.exe')], check=True)
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subprocess.run([str(path / 'test.exe')], check=True)
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print('activation bias ADDI/ADDIU: 4:3 identity, both sides, unrelated sites and register preservation PASS')
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