[Qemu-devel] [PATCH 3/5] tcg-arm: Use strd for tcg_out_arg_reg64

[Richard Henderson]

Signed-off-by: Richard Henderson <address@hidden>
---
 tcg/arm/tcg-target.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 5f71f24..a0a7539 100644
--- a/tcg/arm/tcg-target.c
+++ b/tcg/arm/tcg-target.c
@@ -1156,9 +1156,16 @@ static TCGReg tcg_out_arg_reg64(TCGContext *s, TCGReg 
argreg,
     if (argreg & 1) {
         argreg++;
     }
-    argreg = tcg_out_arg_reg32(s, argreg, arglo);
-    argreg = tcg_out_arg_reg32(s, argreg, arghi);
-    return argreg;
+    if (use_armv6_instructions && argreg >= 4
+        && (arglo & 1) == 0 && arghi == arglo + 1) {
+        tcg_out_strd_8(s, COND_AL, arglo,
+                       TCG_REG_CALL_STACK, (argreg - 4) * 4);
+        return argreg + 2;
+    } else {
+        argreg = tcg_out_arg_reg32(s, argreg, arglo);
+        argreg = tcg_out_arg_reg32(s, argreg, arghi);
+        return argreg;
+    }
 }
 
 #define TLB_SHIFT      (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS)
-- 
1.8.1.4