diff mbox series

[v2,20/48] tcg/optimize: Split out fold_mulu2_i32

Message ID 20211007195456.1168070-21-richard.henderson@linaro.org
State New
Headers show
Series tcg: optimize redundant sign extensions | expand

Commit Message

Richard Henderson Oct. 7, 2021, 7:54 p.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 37 +++++++++++++++++++++----------------
 1 file changed, 21 insertions(+), 16 deletions(-)
diff mbox series

Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 6bb5e19e55..01a0925c89 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -891,6 +891,24 @@  static bool fold_multiply(OptContext *ctx, TCGOp *op)
     return fold_const2(ctx, op);
 }
 
+static bool fold_mulu2_i32(OptContext *ctx, TCGOp *op)
+{
+    if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])) {
+        uint32_t a = arg_info(op->args[2])->val;
+        uint32_t b = arg_info(op->args[3])->val;
+        uint64_t r = (uint64_t)a * b;
+        TCGArg rl, rh;
+        TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_mov_i32);
+
+        rl = op->args[0];
+        rh = op->args[1];
+        tcg_opt_gen_movi(ctx, op, rl, (int32_t)r);
+        tcg_opt_gen_movi(ctx, op2, rh, (int32_t)(r >> 32));
+        return true;
+    }
+    return false;
+}
+
 static bool fold_nand(OptContext *ctx, TCGOp *op)
 {
     return fold_const2(ctx, op);
@@ -1697,22 +1715,6 @@  void tcg_optimize(TCGContext *s)
             }
             break;
 
-        case INDEX_op_mulu2_i32:
-            if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])) {
-                uint32_t a = arg_info(op->args[2])->val;
-                uint32_t b = arg_info(op->args[3])->val;
-                uint64_t r = (uint64_t)a * b;
-                TCGArg rl, rh;
-                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_mov_i32);
-
-                rl = op->args[0];
-                rh = op->args[1];
-                tcg_opt_gen_movi(&ctx, op, rl, (int32_t)r);
-                tcg_opt_gen_movi(&ctx, op2, rh, (int32_t)(r >> 32));
-                continue;
-            }
-            break;
-
         default:
             break;
 
@@ -1766,6 +1768,9 @@  void tcg_optimize(TCGContext *s)
         CASE_OP_32_64(muluh):
             done = fold_multiply(&ctx, op);
             break;
+        case INDEX_op_mulu2_i32:
+            done = fold_mulu2_i32(&ctx, op);
+            break;
         CASE_OP_32_64(nand):
             done = fold_nand(&ctx, op);
             break;