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Unified Diff: src/x64/macro-assembler-x64.h

Issue 2144006: Cardmarking writebarrier. (Closed)
Patch Set: change NewSpace and SemiSpace Contains to match HasHeapObjectTag Created 10 years, 7 months ago
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Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index b4f3240ec819e115a8b70738abcebc99e05fd085..bec142e698b3d74ee3b294a9ea32bc7cb1386866 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -78,8 +78,8 @@ class MacroAssembler: public Assembler {
// ---------------------------------------------------------------------------
// GC Support
- // Set the remebered set bit for an address which points into an
- // object. RecordWriteHelper only works if the object is not in new
+ // For page containing |object| mark region covering |addr| dirty.
+ // RecordWriteHelper only works if the object is not in new
// space.
void RecordWriteHelper(Register object,
Register addr,
@@ -93,7 +93,7 @@ class MacroAssembler: public Assembler {
Condition cc,
Label* branch);
- // Set the remembered set bit for [object+offset].
+ // For page containing |object| mark region covering [object+offset] dirty.
// object is the object being stored into, value is the object being stored.
// If offset is zero, then the scratch register contains the array index into
// the elements array represented as a Smi.
@@ -103,7 +103,7 @@ class MacroAssembler: public Assembler {
Register value,
Register scratch);
- // Set the remembered set bit for [object+offset].
+ // For page containing |object| mark region covering [object+offset] dirty.
// The value is known to not be a smi.
// object is the object being stored into, value is the object being stored.
// If offset is zero, then the scratch register contains the array index into
@@ -220,6 +220,13 @@ class MacroAssembler: public Assembler {
Register src,
int power);
+ // Divide a positive smi's integer value by a power of two.
+ // Provides result as 32-bit integer value.
+ void PositiveSmiDivPowerOfTwoToInteger32(Register dst,
+ Register src,
+ int power);
+
+
// Simple comparison of smis.
void SmiCompare(Register dst, Register src);
void SmiCompare(Register dst, Smi* src);
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