Version 3.14.2
ARM: allowed VFP3 instructions when hardfloat is enabled. (Chromium issue 152506)
Fixed instance_descriptors() and PushStackTraceAndDie regressions. (Chromium issue 151749)
Made GDBJIT interface compile again. (issue 1804)
Fixed Accessors::FunctionGetPrototype's proto chain traversal. (Chromium issue 143967)
Made sure that names of temporaries do not clash with real variables. (issue 2322)
Rejected local module declarations. (Chromium issue 150628)
Rejected uses of lexical for-loop variable on the RHS. (issue 2322)
Fixed slot recording of code target patches. (Chromium issue 152615,chromium:144230)
Changed the Android makefile to use GCC 4.6 instead of GCC 4.4.3.
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@12693 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 62a89b8..0bad960 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -2262,21 +2262,28 @@
__ movsd(double_scratch2, double_result); // Load double_exponent with 1.
// Get absolute value of exponent.
- Label no_neg, while_true, no_multiply;
+ Label no_neg, while_true, while_false;
__ testl(scratch, scratch);
__ j(positive, &no_neg, Label::kNear);
__ negl(scratch);
__ bind(&no_neg);
+ __ j(zero, &while_false, Label::kNear);
+ __ shrl(scratch, Immediate(1));
+ // Above condition means CF==0 && ZF==0. This means that the
+ // bit that has been shifted out is 0 and the result is not 0.
+ __ j(above, &while_true, Label::kNear);
+ __ movsd(double_result, double_scratch);
+ __ j(zero, &while_false, Label::kNear);
+
__ bind(&while_true);
__ shrl(scratch, Immediate(1));
- __ j(not_carry, &no_multiply, Label::kNear);
- __ mulsd(double_result, double_scratch);
- __ bind(&no_multiply);
-
__ mulsd(double_scratch, double_scratch);
+ __ j(above, &while_true, Label::kNear);
+ __ mulsd(double_result, double_scratch);
__ j(not_zero, &while_true);
+ __ bind(&while_false);
// If the exponent is negative, return 1/result.
__ testl(exponent, exponent);
__ j(greater, &done);
@@ -6137,6 +6144,11 @@
}
+bool CodeStub::CanUseFPRegisters() {
+ return true; // Always have SSE2 on x64.
+}
+
+
// Takes the input in 3 registers: address_ value_ and object_. A pointer to
// the value has just been written into the object, now this stub makes sure
// we keep the GC informed. The word in the object where the value has been
@@ -6269,6 +6281,17 @@
Label need_incremental;
Label need_incremental_pop_object;
+ __ movq(regs_.scratch0(), Immediate(~Page::kPageAlignmentMask));
+ __ and_(regs_.scratch0(), regs_.object());
+ __ movq(regs_.scratch1(),
+ Operand(regs_.scratch0(),
+ MemoryChunk::kWriteBarrierCounterOffset));
+ __ subq(regs_.scratch1(), Immediate(1));
+ __ movq(Operand(regs_.scratch0(),
+ MemoryChunk::kWriteBarrierCounterOffset),
+ regs_.scratch1());
+ __ j(negative, &need_incremental);
+
// Let's look at the color of the object: If it is not black we don't have
// to inform the incremental marker.
__ JumpIfBlack(regs_.object(),