Patchwork [PULL,3/8] tcg-arm: Use strd for tcg_out_arg_reg64

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Submitter Richard Henderson
Date Oct. 1, 2013, 9:31 p.m.
Message ID <1380663109-14434-4-git-send-email-rth@twiddle.net>
Download mbox | patch
Permalink /patch/279608/
State New
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Comments

Richard Henderson - Oct. 1, 2013, 9:31 p.m.
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/arm/tcg-target.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

Patch

diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 9d2fe8a..f953f4e 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)