- currently we support IEEE 754 only, so change the condition

[libfirm] / ir / ir / irarch.c

diff --git a/ir/ir/irarch.c b/ir/ir/irarch.c
index ada45d6..549b747 100644 (file)
--- a/ir/ir/irarch.c
+++ b/ir/ir/irarch.c
@@ -516,7 +516,7 @@ static int evaluate_insn(mul_env *env, instruction *inst) {
 /**
  * Evaluate the replacement instructions and build a new graph
  * if faster than the Mul.
- * returns the root of the new graph then or irn otherwise.
+ * Returns the root of the new graph then or irn otherwise.
  *
  * @param irn      the Mul operation
  * @param operand  the multiplication operand
@@ -545,7 +545,7 @@ static ir_node *do_decomposition(ir_node *irn, ir_node *operand, tarval *tv) {
        inst = decompose_mul(&env, R, r, tv);
 
        /* the paper suggests 70% here */
-       mul_costs = (env.evaluate(MUL, tv) * 7) / 10;
+       mul_costs = (env.evaluate(MUL, tv) * 7 + 5) / 10;
        if (evaluate_insn(&env, inst) <= mul_costs && !env.fail) {
                env.op       = operand;
                env.blk      = get_nodes_block(irn);
@@ -634,7 +634,7 @@ static int tv_ld2(tarval *tv, int bits) {
 #define SHL(a, b) tarval_shl(a, b)
 #define SHR(a, b) tarval_shr(a, b)
 #define ADD(a, b) tarval_add(a, b)
-#define SUB(a, b) tarval_sub(a, b)
+#define SUB(a, b) tarval_sub(a, b, NULL)
 #define MUL(a, b) tarval_mul(a, b)
 #define DIV(a, b) tarval_div(a, b)
 #define MOD(a, b) tarval_mod(a, b)
@@ -851,7 +851,7 @@ static ir_node *replace_div_by_mulh(ir_node *div, tarval *tv) {
 
                /* generate the Mulh instruction */
                c = new_r_Const(current_ir_graph, block, mode, mag.M);
-               q    = new_rd_Mulh(dbg, current_ir_graph, block, n, c, mode);
+               q = new_rd_Mulh(dbg, current_ir_graph, block, n, c, mode);
 
                if (mag.need_add) {
                        if (mag.s > 0) {
@@ -886,7 +886,7 @@ ir_node *arch_dep_replace_div_by_const(ir_node *irn) {
        if (params == NULL || (opts & arch_dep_div_by_const) == 0)
                return irn;
 
-       if (get_irn_opcode(irn) == iro_Div) {
+       if (is_Div(irn)) {
                ir_node *c = get_Div_right(irn);
                ir_node *block, *left;
                ir_mode *mode;
@@ -895,7 +895,7 @@ ir_node *arch_dep_replace_div_by_const(ir_node *irn) {
                int n, bits;
                int k, n_flag;
 
-               if (get_irn_op(c) != op_Const)
+               if (! is_Const(c))
                        return irn;
 
                tv = get_Const_tarval(c);
@@ -982,7 +982,7 @@ ir_node *arch_dep_replace_mod_by_const(ir_node *irn) {
        if (params == NULL || (opts & arch_dep_mod_by_const) == 0)
                return irn;
 
-       if (get_irn_opcode(irn) == iro_Mod) {
+       if (is_Mod(irn)) {
                ir_node *c = get_Mod_right(irn);
                ir_node *block, *left;
                ir_mode *mode;
@@ -991,7 +991,7 @@ ir_node *arch_dep_replace_mod_by_const(ir_node *irn) {
                int n, bits;
                int k;
 
-               if (get_irn_op(c) != op_Const)
+               if (! is_Const(c))
                        return irn;
 
                tv = get_Const_tarval(c);
@@ -1076,7 +1076,7 @@ void arch_dep_replace_divmod_by_const(ir_node **div, ir_node **mod, ir_node *irn
                ((opts & (arch_dep_div_by_const|arch_dep_mod_by_const)) != (arch_dep_div_by_const|arch_dep_mod_by_const)))
                return;
 
-       if (get_irn_opcode(irn) == iro_DivMod) {
+       if (is_DivMod(irn)) {
                ir_node *c = get_DivMod_right(irn);
                ir_node *block, *left;
                ir_mode *mode;
@@ -1085,7 +1085,7 @@ void arch_dep_replace_divmod_by_const(ir_node **div, ir_node **mod, ir_node *irn
                int n, bits;
                int k, n_flag;
 
-               if (get_irn_op(c) != op_Const)
+               if (! is_Const(c))
                        return;
 
                tv = get_Const_tarval(c);