1 files changed, 78 insertions, 0 deletions
diff --git a/examples/sum.c b/examples/sum.c
new file mode 100644
index 0000000..cc8f54b
--- /dev/null
+++ b/examples/sum.c
@@ -0,0 +1,78 @@
+#include <stdio.h>
+#include <time.h>
+
+#include "../include/ejit/ejit.h"
+
+struct ejit_func *compile(bool try_jit, bool im_scawed)
+{
+	struct ejit_operand params[2] = {
+		EJIT_OPERAND_GPR(0, EJIT_INT32), /* loc 0 contains s */
+		EJIT_OPERAND_GPR(1, EJIT_INT32)  /* loc 1 contains n */
+	};
+	struct ejit_func *f = ejit_create_func(EJIT_INT32, 2, params);
+
+	/* n == 0, return s */
+	struct ejit_reloc recurse = ejit_bnei(f, EJIT_GPR(1), 0);
+	ejit_retr(f, EJIT_GPR(0));
+	ejit_patch(f, recurse, ejit_label(f));
+
+	/* s += n */
+	ejit_addr(f, EJIT_GPR(0), EJIT_GPR(0), EJIT_GPR(1));
+
+	/* n -= 1 */
+	ejit_subi(f, EJIT_GPR(1), EJIT_GPR(1), 1);
+
+	struct ejit_operand args[2] = {
+		EJIT_OPERAND_GPR(0, EJIT_INT32), /* s */
+		EJIT_OPERAND_GPR(1, EJIT_INT32) /* n */
+	};
+
+	/* recurse */
+	ejit_movi(f, EJIT_GPR(2), (uintptr_t)f);
+	ejit_tailr(f, EJIT_GPR(2), 2, args);
+
+	ejit_select_compile_func(f, 3, 0, EJIT_USE64(uintptr_t), try_jit, im_scawed);
+	return f;
+}
+
+int main(int argc, char *argv[])
+{
+	if(argc != 4){
+		fprintf(stderr, "Usage: %s compile_num loop_num jit\n", argv[0]);
+		return -1;
+	}
+
+	int jit_level = strtoull(argv[3], 0, 0);
+	size_t compile_num = strtoull(argv[1], 0, 0);
+	struct ejit_func **info = calloc(compile_num, sizeof(struct ejit_func *));
+
+	clock_t t = clock();
+	for(size_t i = 0; i < compile_num; ++i){
+		info[i] = compile(jit_level > 0, jit_level > 1);
+	}
+	t = clock() - t;
+
+	double compile_time_total = ((double)t) / CLOCKS_PER_SEC;
+	double compile_time_one = compile_time_total / compile_num;
+	printf("Compilation for n = %zu took %fs (1/%f).\n",
+			compile_num, compile_time_total, compile_time_one);
+
+	size_t run_num = strtoull(argv[2], 0, 0);
+	t = clock();
+	struct ejit_arg args[2] = {
+		(struct ejit_arg){.type = EJIT_INT32, .l = 0}, /* s */
+		(struct ejit_arg){.type = EJIT_INT32, .l = run_num} /* n */
+	};
+	int32_t result = ejit_run_func_i(info[0], 2, args);
+	t = clock() - t;
+
+	double run_time_total = ((double)t) / CLOCKS_PER_SEC;
+	printf("Running loop for n = %zu took %fs with res %ld\n",
+			run_num, run_time_total, (long)result);
+
+	for(size_t i = 0; i < compile_num; ++i)
+		ejit_destroy_func(info[i]);
+
+	free(info);
+	return 0;
+}