* Push a virtual Register onto the stack.
*/
static void x87_push(x87_state *state, int reg_idx, ir_node *node) {
-// assert(x87_on_stack(state, reg_idx) == -1 && "double push");
+ assert(x87_on_stack(state, reg_idx) == -1 && "double push");
assert(state->depth < N_x87_REGS && "stack overrun");
++state->depth;
GEN_UNOP(fsqrt)
/**
- * Simulate a virtual Copy
+ * Simulate a be_Copy.
*/
static void sim_Copy(x87_state *state, ir_node *n, const arch_env_t *env) {
ir_mode *mode = get_irn_mode(n);
}
}
+/**
+ * Simulate a be_Call
+ */
+static void sim_Call(x87_state *state, ir_node *n, const arch_env_t *env) {
+ ir_type *call_tp = be_Call_get_type(n);
+
+ /* at the begin of a call the x87 state should be empty */
+ assert(state->depth == 0 && "stack not empty before call");
+
+ /*
+ * If the called function returns a float, it is returned in st(0).
+ * This even happens if the return value is NOT used.
+ * Moreover, only one return result is supported.
+ */
+ if (get_method_n_ress(call_tp) > 0) {
+ ir_type *res_type = get_method_res_type(call_tp, 0);
+ ir_mode *mode = get_type_mode(res_type);
+
+ if (mode && mode_is_float(mode)) {
+ /*
+ * TODO: what to push here? The result might be unused and currently
+ * we have no possibility to detect this :-(
+ */
+ x87_push(state, 0, n);
+ }
+ }
+}
+
+/**
+ * Simulate a be_Spill.
+ */
+static void sim_Spill(x87_state *state, ir_node *n, const arch_env_t *env) {
+ assert(0 && "Spill not lowered");
+ sim_fst(state, n, env);
+}
+
+/**
+ * Simulate a be_Reload
+ */
+static void sim_Reload(x87_state *state, ir_node *n, const arch_env_t *env) {
+ assert(0 && "Reload not lowered");
+ sim_fld(state, n, env);
+}
+
/**
* Run a simulation and fix all virtual instructions for a block.
*
ASSOC_IA32(fsqrt);
ASSOC_IA32(fst);
ASSOC_BE(Copy);
+ ASSOC_BE(Call);
+ ASSOC_BE(Spill);
+ ASSOC_BE(Reload);
ASSOC(Phi);
#undef ASSOC_BE
#undef ASSOC_IA32