diff mbox series

[2/5] tcg/optimize: Optimize bswap

Message ID 20181120121558.7660-3-richard.henderson@linaro.org
State Superseded
Headers show
Series tcg: Make bswap support in qemu_ld/st optional | expand

Commit Message

Richard Henderson Nov. 20, 2018, 12:15 p.m. UTC 
Somehow we forgot these operations, once upon a time.
This will allow immediate stores to have their bswap
optimized away.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 tcg/optimize.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

-- 
2.17.2
diff mbox series

Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5dbe11c3c8..6b98ec13e6 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -353,6 +353,15 @@  static TCGArg do_constant_folding_2(TCGOpcode op, TCGArg x, TCGArg y)
     CASE_OP_32_64(ext16u):
         return (uint16_t)x;
 
+    CASE_OP_32_64(bswap16):
+        return bswap16(x);
+
+    CASE_OP_32_64(bswap32):
+        return bswap32(x);
+
+    case INDEX_op_bswap64_i64:
+        return bswap64(x);
+
     case INDEX_op_ext_i32_i64:
     case INDEX_op_ext32s_i64:
         return (int32_t)x;
@@ -1105,6 +1114,9 @@  void tcg_optimize(TCGContext *s)
         CASE_OP_32_64(ext16s):
         CASE_OP_32_64(ext16u):
         CASE_OP_32_64(ctpop):
+        CASE_OP_32_64(bswap16):
+        CASE_OP_32_64(bswap32):
+        case INDEX_op_bswap64_i64:
         case INDEX_op_ext32s_i64:
         case INDEX_op_ext32u_i64:
         case INDEX_op_ext_i32_i64: