Issue 247443002: ARM64: Move sign-extension to load instructions.

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Issue 247443002: ARM64: Move sign-extension to load instructions. (Closed)

Created:
6 years, 8 months ago by jbramley

Modified:
6 years, 8 months ago

Reviewers:
ulan, jochen (gone - plz use gerrit)

CC:
v8-dev

Base URL:
https://v8.googlecode.com/svn/branches/bleeding_edge

Visibility:
Public.

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Description

ARM64: Move sign-extension to load instructions. The SXTW extend mode is usually free when used in a load or store operand, but it can slightly increase the latency of an arithmetic instruction. This patch optimises some address calculations accordingly: - PrepareKeyedExternalArrayOperand. - BuildSeqStringOperand. - DoStringCharFromCode. BUG= R=ulan@chromium.org Committed: https://code.google.com/p/v8/source/detail?r=20891

Patch Set 1 #

Created: 6 years, 8 months ago

Download [raw] [tar.bz2]

		Unified diffs	Side-by-side diffs	Delta from patch set	Stats (+28 lines, -47 lines)			Patch
	M	src/arm64/lithium-arm64.cc	View		4 chunks	+6 lines, -2 lines	0 comments	Download
	M	src/arm64/lithium-codegen-arm64.cc	View		3 chunks	+22 lines, -45 lines	0 comments	Download

Messages

Total messages: 3 (0 generated)

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jbramley

This doesn't actually make anything measurably faster, but it does tidy things up.

6 years, 8 months ago (2014-04-22 13:46:40 UTC) #1

jbramley

6 years, 8 months ago (2014-04-22 15:57:11 UTC) #3

Message was sent while issue was closed.

Committed patchset #1 manually as r20891 (presubmit successful).

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