Revision: 19120
Author: [email protected]
Date: Wed Feb 5 19:56:52 2014 UTC
Log: A64: Truncate booleans to 0 or 1 in LTaggedToI.
[email protected]
Review URL: https://codereview.chromium.org/145973022
http://code.google.com/p/v8/source/detail?r=19120
Modified:
/branches/experimental/a64/src/a64/lithium-codegen-a64.cc
=======================================
--- /branches/experimental/a64/src/a64/lithium-codegen-a64.cc Wed Feb 5
19:41:46 2014 UTC
+++ /branches/experimental/a64/src/a64/lithium-codegen-a64.cc Wed Feb 5
19:56:52 2014 UTC
@@ -5210,7 +5210,7 @@
if (instr->truncating()) {
Register output = ToRegister(instr->result());
Register scratch2 = ToRegister(temp2);
- Label check_bools, undefined;
+ Label check_bools;
// If it's not a heap number, jump to undefined check.
__ JumpIfNotRoot(scratch1, Heap::kHeapNumberMapRootIndex,
&check_bools);
@@ -5222,15 +5222,18 @@
__ Bind(&check_bools);
- TODO_UNIMPLEMENTED("LTaggedToI: Truncate booleans to 0 or 1.");
+ Register true_root = output;
+ Register false_root = scratch2;
+ __ LoadTrueFalseRoots(true_root, false_root);
+ __ Cmp(scratch1, true_root);
+ __ Cset(output, eq);
+ __ Ccmp(scratch1, false_root, ZFlag, ne);
+ __ B(eq, &done);
- // Check for undefined. Undefined is converted to zero for truncating
+ // Output contains zero, undefined is converted to zero for truncating
// conversions.
- __ Bind(&undefined);
-
DeoptimizeIfNotRoot(input, Heap::kUndefinedValueRootIndex,
instr->environment());
- __ Mov(output, 0);
} else {
Register output = ToRegister32(instr->result());
--
--
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