static int add3(long a, long b, long c)
{
void *code;
unsigned long len;
func3_t func;
/* Create a SLJIT compiler */
struct sljit_compiler *C = sljit_create_compiler();
/* Start a context(function entry), have 3 arguments, discuss later */
sljit_emit_enter(C, 0, 3, 1, 3, 0, 0, 0);
/* The first arguments of function is register SLJIT_S0, 2nd, SLJIT_S1, etc. */
/* R0 = first */
sljit_emit_op1(C, SLJIT_MOV, SLJIT_R0, 0, SLJIT_S0, 0);
/* R0 = R0 + second */
sljit_emit_op2(C, SLJIT_ADD, SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_S1, 0);
/* R0 = R0 + third */
sljit_emit_op2(C, SLJIT_ADD, SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_S2, 0);
/* This statement mov R0 to RETURN REG and return */
/* in fact, R0 is RETURN REG itself */
sljit_emit_return(C, SLJIT_MOV, SLJIT_R0, 0);
/* Generate machine code */
code = sljit_generate_code(C);
len = sljit_get_generated_code_size(C);
/* Execute code */
func = (func3_t)code;
printf("func return %ld\n", func(a, b, c));
/* dump_code(code, len); */
/* Clean up */
sljit_free_compiler(C);
sljit_free_code(code);
return 0;
}
SLJIT_API_FUNC_ATTRIBUTE struct sljit_jump* sljit_emit_cmp(struct sljit_compiler *compiler, int type,
int src1, sljit_w src1w,
int src2, sljit_w src2w)
{
/* Default compare for most architectures. */
int flags, tmp_src, condition;
sljit_w tmp_srcw;
CHECK_ERROR_PTR();
check_sljit_emit_cmp(compiler, type, src1, src1w, src2, src2w);
condition = type & 0xff;
if (SLJIT_UNLIKELY((src1 & SLJIT_IMM) && !(src2 & SLJIT_IMM))) {
/* Immediate is prefered as second argument by most architectures. */
switch (condition) {
case SLJIT_C_LESS:
condition = SLJIT_C_GREATER;
break;
case SLJIT_C_GREATER_EQUAL:
condition = SLJIT_C_LESS_EQUAL;
break;
case SLJIT_C_GREATER:
condition = SLJIT_C_LESS;
break;
case SLJIT_C_LESS_EQUAL:
condition = SLJIT_C_GREATER_EQUAL;
break;
case SLJIT_C_SIG_LESS:
condition = SLJIT_C_SIG_GREATER;
break;
case SLJIT_C_SIG_GREATER_EQUAL:
condition = SLJIT_C_SIG_LESS_EQUAL;
break;
case SLJIT_C_SIG_GREATER:
condition = SLJIT_C_SIG_LESS;
break;
case SLJIT_C_SIG_LESS_EQUAL:
condition = SLJIT_C_SIG_GREATER_EQUAL;
break;
}
type = condition | (type & (SLJIT_INT_OP | SLJIT_REWRITABLE_JUMP));
tmp_src = src1;
src1 = src2;
src2 = tmp_src;
tmp_srcw = src1w;
src1w = src2w;
src2w = tmp_srcw;
}
if (condition <= SLJIT_C_NOT_ZERO)
flags = SLJIT_SET_E;
else if (condition <= SLJIT_C_LESS_EQUAL)
flags = SLJIT_SET_U;
else
flags = SLJIT_SET_S;
#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
compiler->skip_checks = 1;
#endif
PTR_FAIL_IF(sljit_emit_op2(compiler, SLJIT_SUB | flags | (type & SLJIT_INT_OP),
SLJIT_UNUSED, 0, src1, src1w, src2, src2w));
#if (defined SLJIT_VERBOSE && SLJIT_VERBOSE) || (defined SLJIT_DEBUG && SLJIT_DEBUG)
compiler->skip_checks = 1;
#endif
return sljit_emit_jump(compiler, condition | (type & SLJIT_REWRITABLE_JUMP));
}
