runtime/vm/intrinsifier_x64.cc - Issue 11568044: Add DoubleToSmi optimistically, preventing boxing/unboxing of doubles and propagate smi-nessof the …

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Unified Diff: runtime/vm/intrinsifier_x64.cc

Issue 11568044: Add DoubleToSmi optimistically, preventing boxing/unboxing of doubles and propagate smi-nessof the … (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/

Patch Set: Created 8 years ago

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Index: runtime/vm/intrinsifier_x64.cc

===================================================================

--- runtime/vm/intrinsifier_x64.cc (revision 16259)

+++ runtime/vm/intrinsifier_x64.cc (working copy)

@@ -1392,8 +1392,9 @@

// Overflow is signalled with minint.

Label fall_through;

// Check for overflow and that it fits into Smi.

- __ cmpq(RAX, Immediate(0xC000000000000000));

- __ j(NEGATIVE, &fall_through, Assembler::kNearJump);

+ __ movq(RCX, RAX);

+ __ shlq(RCX, Immediate(1));

+ __ j(OVERFLOW, &fall_through, Assembler::kNearJump);

__ SmiTag(RAX);

__ ret();

__ Bind(&fall_through);

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