src/arm/macro-assembler-arm.h - Issue 6676060: Improved modulo operation in lithium as well as bailout on -0....

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

Issue 6676060: Improved modulo operation in lithium as well as bailout on -0.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/

Patch Set: '' Created 9 years, 9 months ago

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Index: src/arm/macro-assembler-arm.h

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

--- src/arm/macro-assembler-arm.h (revision 7286)

+++ src/arm/macro-assembler-arm.h (working copy)

@@ -826,6 +826,16 @@

void JumpIfNotPowerOfTwoOrZero(Register reg,

Label* not_power_of_two_or_zero);

+ // Check whether the value of reg is a power of two and not zero.

+ // Control falls through if it is, with scratch containing the mask

+ // value (reg - 1).

+ // Otherwise control jumps to the 'zero_and_neg' label if the value of reg is

+ // zero or negative, or jumps to the 'not_power_of_two' label if the value is

+ // strictly positive but not a power of two.

+ void JumpIfNotPowerOfTwoOrZeroAndNeg(Register reg,

+ Register scratch,

+ Label* zero_and_neg,

+ Label* not_power_of_two);

// ---------------------------------------------------------------------------

// Smi utilities

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