Closed
Bug 1431096
Opened 6 years ago
Closed 6 years ago
Add index masking when loading int/unit strings
Categories
(Core :: JavaScript Engine: JIT, enhancement)
Core
JavaScript Engine: JIT
Tracking
()
RESOLVED
FIXED
mozilla60
| Tracking | Status | |
|---|---|---|
| firefox60 | --- | fixed |
People
(Reporter: jandem, Assigned: jandem)
References
(Blocks 1 open bug)
Details
Attachments
(1 file)
|
6.38 KB,
patch
|
nbp
:
review+
|
Details | Diff | Splinter Review |
These are power-of-two constants and that's nice because it means we only have to and32() the index after the branch. The patch adds MacroAssembler::boundsCheck32PowerOfTwo for this.
Attachment #8943263 -
Flags: review?(nicolas.b.pierron)
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Comment 1•6 years ago
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Comment on attachment 8943263 [details] [diff] [review] Patch Review of attachment 8943263 [details] [diff] [review]: ----------------------------------------------------------------- ::: js/src/jit/MacroAssembler.cpp @@ +3484,5 @@ > > +void > +MacroAssembler::boundsCheck32PowerOfTwo(Register index, uint32_t length, Label* failure) > +{ > + MOZ_ASSERT(mozilla::IsPowerOfTwo(length)); Thanks!
Attachment #8943263 -
Flags: review?(nicolas.b.pierron) → review+
Pushed by jandemooij@gmail.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/01f9f3fdc1f9 Use Spectre index masking when loading int/unit strings. r=nbp
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Comment 3•6 years ago
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| bugherder | ||
https://hg.mozilla.org/mozilla-central/rev/01f9f3fdc1f9
Status: ASSIGNED → RESOLVED
Closed: 6 years ago
status-firefox60:
--- → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla60
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Description
•