From: Richard Henderson <rth@twiddle.net>
Date: Wed, 28 Aug 2013 18:16:16 +0000 (-0700)
Subject: tcg-arm: Use strd for tcg_out_arg_reg64
X-Git-Tag: qemu-xen-4.5.0-rc1~435^2~5
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=e5e2e4a74b75b41f72e1e3b3bac8c2a6b02896c2;p=qemu-xen.git

tcg-arm: Use strd for tcg_out_arg_reg64

Signed-off-by: Richard Henderson <rth@twiddle.net>
---

diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 9d2fe8a0f7..f953f4e556 100644
--- a/tcg/arm/tcg-target.c
+++ b/tcg/arm/tcg-target.c
@@ -1149,9 +1149,16 @@ 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)