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Unified Diff: src/arm/macro-assembler-arm.cc

Issue 9153002: Use shift and add instead of mul on ARM for integer hash. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 8 years, 11 months ago
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Index: src/arm/macro-assembler-arm.cc
===================================================================
--- src/arm/macro-assembler-arm.cc (revision 10354)
+++ src/arm/macro-assembler-arm.cc (working copy)
@@ -1456,8 +1456,9 @@
// hash = hash ^ (hash >> 4);
eor(t0, t0, Operand(t0, LSR, 4));
// hash = hash * 2057;
- mov(t1, Operand(2057));
- mul(t0, t0, t1);
+ mov(t1, Operand(t0, LSL, 11));
+ add(t0, t0, Operand(t0, LSL, 3));
+ add(t0, t0, t1);
// hash = hash ^ (hash >> 16);
eor(t0, t0, Operand(t0, LSR, 16));
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