From: Erik Verbruggen <erik.verbruggen@me.com>
Date: Wed, 25 Sep 2013 09:58:03 +0000 (+0200)
Subject: V4 JIT: optimize constant-to-register loading.
X-Git-Tag: upstream/5.2.1~351
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e62a61cdbc22dcf0dd2c6c8c22b06be897577ec0;p=platform%2Fupstream%2Fqtdeclarative.git

V4 JIT: optimize constant-to-register loading.

Change-Id: I02e3cdd5f9a68fbf6bfd7805c385d807b344155b
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
---

diff --git a/src/qml/compiler/qv4isel_masm_p.h b/src/qml/compiler/qv4isel_masm_p.h
index 86a4dd6..a9355bd 100644
--- a/src/qml/compiler/qv4isel_masm_p.h
+++ b/src/qml/compiler/qv4isel_masm_p.h
@@ -1224,9 +1224,12 @@ public:
     {
         if (V4IR::Const *c = e->asConst()) {
 #if QT_POINTER_SIZE == 8
-            load64(constantTable().loadValueAddress(c, ScratchRegister), ReturnValueRegister);
-            move(TrustedImm64(QV4::Value::NaNEncodeMask), ScratchRegister);
-            xor64(ScratchRegister, ReturnValueRegister);
+            union {
+                double d;
+                int64_t i;
+            } u;
+            u.d = c->value;
+            move(TrustedImm64(u.i), ReturnValueRegister);
             move64ToDouble(ReturnValueRegister, target);
 #else
             JSC::MacroAssembler::loadDouble(constantTable().loadValueAddress(c, ScratchRegister), target);