Issue 1418253002: switch cpu flags to 0 for unitialized to avoid compare

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Issue 1418253002: switch cpu flags to 0 for unitialized to avoid compare (Closed)

Created:
5 years, 1 month ago by fbarchard1

Modified:
5 years, 1 month ago

Reviewers:
harryjin, fbarchard

Base URL:
https://chromium.googlesource.com/libyuv/libyuv@master

Target Ref:
refs/heads/master

Project:
libyuv

Visibility:
Public.

Description

switch cpu flags to 0 for unitialized to avoid compare R=harryjin@google.com BUG=libyuv:512 Committed: https://chromium.googlesource.com/libyuv/libyuv/+/1502832a70f886829840a8071d90da9bbf7a7bce

Patch Set 1 #

Patch Set 2 : bump chromium to lkgr #

Created: 5 years, 1 month ago

	Unified diffs	Side-by-side diffs	Stats (+8 lines, -8 lines)
M	DEPS	View	1 chunk	+1 line, -1 line	0 comments
M	README.chromium	View	1 chunk	+1 line, -1 line	0 comments
M	include/libyuv/cpu_id.h	View	2 chunks	+2 lines, -3 lines	0 comments
M	include/libyuv/version.h	View	1 chunk	+1 line, -1 line	0 comments
M	source/cpu_id.cc	View	2 chunks	+3 lines, -2 lines	0 comments

Messages

Total messages: 5 (1 generated)

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fbarchard1

Committed patchset #2 (id:20001) manually as 1502832a70f886829840a8071d90da9bbf7a7bce (presubmit successful).

5 years, 1 month ago (2015-10-23 17:57:46 UTC) #3

fbarchard

5 years, 1 month ago (2015-10-23 21:32:31 UTC) #5

Message was sent while issue was closed.

saves 1 byte per call

  00000074: A1 00 00 00 00     mov         eax,dword ptr [_cpu_info_]
  00000079: 83 F8 01           cmp         eax,1
  0000007C: 75 08              jne         00000086
  0000007E: E8 00 00 00 00     call        _InitCpuFlags
  00000086: A8 40              test        al,40h
  00000088: 74 21              je          000000AB


  00000074: A1 00 00 00 00     mov         eax,dword ptr [_cpu_info_]
  00000079: 85 C0              test        eax,eax
  0000007B: 75 05              jne         00000082
  0000007D: E8 00 00 00 00     call        _InitCpuFlags
  00000082: A8 40              test        al,40h
  00000084: 75 0C              jne         00000092

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