mirror of
https://github.com/rkujawa/rk65c02.git
synced 2026-03-11 03:16:11 +00:00
a73ebc3024
- interrupts: IRQ vector at $FFFE, vector device at $FFFC, idle_wait + assert_irq - hello_serial: custom bus device at $DE00, guest writes host prints - stepper: rk65c02_step(1) loop with regs and disassembly - jit_bench: min3.rom interpreter vs JIT wall time - breakpoints: debug_breakpoint_add at min3 entry, inspect then continue - README: document new examples, run from examples/ or make run-<name> - Makefile: EXAMPLES and run-* targets for all five Made-with: Cursor
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* JIT benchmark — same workload with JIT on vs off, report wall time.
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*
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* Build: make jit_bench min3.rom
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* Run: ./jit_bench
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*
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* Demonstrates: toggling JIT with rk65c02_jit_enable; timing interpreter vs
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* JIT for the same ROM (min3) over multiple iterations.
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* Expected: prints interpreter and JIT times; PASS.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <time.h>
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#include "instruction.h"
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#include "rk65c02.h"
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static const uint16_t load_addr = 0xC000;
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#define ITERATIONS 500
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static double
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elapsed_us(struct timespec *t0, struct timespec *t1)
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{
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return (double)(t1->tv_sec - t0->tv_sec) * 1e6 +
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(double)(t1->tv_nsec - t0->tv_nsec) / 1e3;
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}
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int
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main(void)
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{
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rk65c02emu_t e;
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struct timespec t0, t1;
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uint8_t a = 5, b = 9, c = 4;
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uint32_t i;
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double us_interp, us_jit;
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e = rk65c02_load_rom("min3.rom", load_addr, NULL);
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e.regs.SP = 0xFF;
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e.regs.PC = load_addr;
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/* Interpreter: JIT off, run ITERATIONS times. */
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rk65c02_jit_enable(&e, false);
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clock_gettime(CLOCK_MONOTONIC, &t0);
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for (i = 0; i < ITERATIONS; i++) {
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e.regs.SP = 0xFF;
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e.regs.PC = load_addr;
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stack_push(&e, a);
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stack_push(&e, b);
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stack_push(&e, c);
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rk65c02_start(&e);
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}
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clock_gettime(CLOCK_MONOTONIC, &t1);
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us_interp = elapsed_us(&t0, &t1);
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/* JIT: enable JIT, run ITERATIONS times. */
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rk65c02_jit_enable(&e, true);
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clock_gettime(CLOCK_MONOTONIC, &t0);
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for (i = 0; i < ITERATIONS; i++) {
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e.regs.SP = 0xFF;
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e.regs.PC = load_addr;
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stack_push(&e, a);
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stack_push(&e, b);
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stack_push(&e, c);
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rk65c02_start(&e);
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}
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clock_gettime(CLOCK_MONOTONIC, &t1);
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us_jit = elapsed_us(&t0, &t1);
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printf("min3.rom x %u iterations:\n", ITERATIONS);
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printf(" interpreter: %.0f us (%.1f us/run)\n", us_interp, us_interp / ITERATIONS);
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printf(" JIT: %.0f us (%.1f us/run)\n", us_jit, us_jit / ITERATIONS);
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printf("PASS: JIT benchmark done.\n");
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return 0;
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}
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