[PATCH v4 21/51] tcg/optimize: Split out fold_addsub2_i32

[Richard Henderson <richard.henderson@linaro.org>]

Add two additional helpers, fold_add2_i32 and fold_sub2_i32
which will not be simple wrappers forever.

Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 70 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 44 insertions(+), 26 deletions(-)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 805522f99d..9d1d045363 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -704,6 +704,39 @@ static bool fold_add(OptContext *ctx, TCGOp *op)
     return fold_const2(ctx, op);
 }
 
+static bool fold_addsub2_i32(OptContext *ctx, TCGOp *op, bool add)
+{
+    if (arg_is_const(op->args[2]) && arg_is_const(op->args[3]) &&
+        arg_is_const(op->args[4]) && arg_is_const(op->args[5])) {
+        uint32_t al = arg_info(op->args[2])->val;
+        uint32_t ah = arg_info(op->args[3])->val;
+        uint32_t bl = arg_info(op->args[4])->val;
+        uint32_t bh = arg_info(op->args[5])->val;
+        uint64_t a = ((uint64_t)ah << 32) | al;
+        uint64_t b = ((uint64_t)bh << 32) | bl;
+        TCGArg rl, rh;
+        TCGOp *op2 = tcg_op_insert_before(ctx->tcg, op, INDEX_op_mov_i32);
+
+        if (add) {
+            a += b;
+        } else {
+            a -= b;
+        }
+
+        rl = op->args[0];
+        rh = op->args[1];
+        tcg_opt_gen_movi(ctx, op, rl, (int32_t)a);
+        tcg_opt_gen_movi(ctx, op2, rh, (int32_t)(a >> 32));
+        return true;
+    }
+    return false;
+}
+
+static bool fold_add2_i32(OptContext *ctx, TCGOp *op)
+{
+    return fold_addsub2_i32(ctx, op, true);
+}
+
 static bool fold_and(OptContext *ctx, TCGOp *op)
 {
     return fold_const2(ctx, op);
@@ -1056,6 +1089,11 @@ static bool fold_sub(OptContext *ctx, TCGOp *op)
     return fold_const2(ctx, op);
 }
 
+static bool fold_sub2_i32(OptContext *ctx, TCGOp *op)
+{
+    return fold_addsub2_i32(ctx, op, false);
+}
+
 static bool fold_xor(OptContext *ctx, TCGOp *op)
 {
     return fold_const2(ctx, op);
@@ -1701,32 +1739,6 @@ void tcg_optimize(TCGContext *s)
             }
             break;
 
-        case INDEX_op_add2_i32:
-        case INDEX_op_sub2_i32:
-            if (arg_is_const(op->args[2]) && arg_is_const(op->args[3])
-                && arg_is_const(op->args[4]) && arg_is_const(op->args[5])) {
-                uint32_t al = arg_info(op->args[2])->val;
-                uint32_t ah = arg_info(op->args[3])->val;
-                uint32_t bl = arg_info(op->args[4])->val;
-                uint32_t bh = arg_info(op->args[5])->val;
-                uint64_t a = ((uint64_t)ah << 32) | al;
-                uint64_t b = ((uint64_t)bh << 32) | bl;
-                TCGArg rl, rh;
-                TCGOp *op2 = tcg_op_insert_before(s, op, INDEX_op_mov_i32);
-
-                if (opc == INDEX_op_add2_i32) {
-                    a += b;
-                } else {
-                    a -= b;
-                }
-
-                rl = op->args[0];
-                rh = op->args[1];
-                tcg_opt_gen_movi(&ctx, op, rl, (int32_t)a);
-                tcg_opt_gen_movi(&ctx, op2, rh, (int32_t)(a >> 32));
-                continue;
-            }
-            break;
 
         default:
             break;
@@ -1737,6 +1749,9 @@ void tcg_optimize(TCGContext *s)
         CASE_OP_32_64_VEC(add):
             done = fold_add(&ctx, op);
             break;
+        case INDEX_op_add2_i32:
+            done = fold_add2_i32(&ctx, op);
+            break;
         CASE_OP_32_64_VEC(and):
             done = fold_and(&ctx, op);
             break;
@@ -1833,6 +1848,9 @@ void tcg_optimize(TCGContext *s)
         CASE_OP_32_64_VEC(sub):
             done = fold_sub(&ctx, op);
             break;
+        case INDEX_op_sub2_i32:
+            done = fold_sub2_i32(&ctx, op);
+            break;
         CASE_OP_32_64_VEC(xor):
             done = fold_xor(&ctx, op);
             break;
-- 
2.25.1