#include "test.h"

#define NTARGETS ((size_t) 4)

static void
run_test(jit_state_t *j, uint8_t *arena_base, size_t arena_size)
{
	jit_begin(j, arena_base, arena_size);
	size_t align = jit_enter_jit_abi(j, 0, 0, 0);
	jit_load_args_1(j, jit_operand_gpr (JIT_OPERAND_ABI_POINTER, JIT_R0));

	jit_reloc_t default_target = jit_bgei_u(j, JIT_R0, NTARGETS);

	// FIXME: need ldxr with word stride, then can eliminate lshi.
	jit_lshi(j, JIT_R0, JIT_R0, sizeof(intptr_t) == 4 ? 2 : 3);
	jit_reloc_t table = jit_mov_addr(j, JIT_R1);
	jit_ldxr(j, JIT_R1, JIT_R1, JIT_R0);
	jit_jmpr(j, JIT_R1);

	jit_begin_data (j, (NTARGETS + 1) * sizeof(intptr_t));
	jit_align(j, sizeof(intptr_t));
	jit_patch_here(j, table);
	jit_reloc_t targets[NTARGETS];
	jit_reloc_t tails[NTARGETS];
	for (size_t i = 0; i < NTARGETS; i++) {
		targets[i] = jit_emit_addr(j);
	}
	jit_end_data (j);

	for (size_t i = 0; i < NTARGETS; i++) {
		jit_patch_here(j, targets[i]);
		jit_movi(j, JIT_R0, i * i);
		tails[i] = jit_jmp(j);
	}

	jit_patch_here(j, default_target);
	jit_movi(j, JIT_R0, 42);
	for (int i = 0; i < NTARGETS; i++) {
		jit_patch_here(j, tails[i]);
	}
	jit_leave_jit_abi(j, 0, 0, align);
	jit_retr(j, JIT_R0);

	jit_word_t (*f)(jit_word_t) = jit_end(j, NULL);

	for (int i = -2; i < ((int) NTARGETS) + 2; i++) {
		if (i < 0) {
			ASSERT(f(i) == 42);
		} else if (i < NTARGETS) {
			ASSERT(f(i) == i * i);
		} else {
			ASSERT(f(i) == 42);
		}
	}
}

int
main (int argc, char *argv[])
{
	return main_helper(argc, argv, run_test);
}