From f923328821e2e835c725822bce2aac6e10c52dd9 Mon Sep 17 00:00:00 2001 From: Jim Wilson Date: Wed, 29 Nov 2017 10:22:26 -0800 Subject: [PATCH] In x86 -n docs, mention that you need an explicit nop fill byte. gas/ PR gas/22464 * doc/c-i386.texi (-n): Clarify docs. --- gas/ChangeLog | 5 +++++ gas/doc/c-i386.texi | 3 ++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index 0512f23d6e..8124043fac 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,8 @@ +2017-11-29 Jim Wilson + + PR gas/22464 + * doc/c-i386.texi (-n): Clarify docs. + 2017-11-29 Renlin Li * config/tc-aarch64.c (reg_names): Fix IP1 register alias typo. diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi index a1d33bde3d..a0e280c63c 100644 --- a/gas/doc/c-i386.texi +++ b/gas/doc/c-i386.texi @@ -74,7 +74,8 @@ usage and use x86-64 as target platform). @item -n By default, x86 GAS replaces multiple nop instructions used for alignment within code sections with multi-byte nop instructions such -as leal 0(%esi,1),%esi. This switch disables the optimization. +as leal 0(%esi,1),%esi. This switch disables the optimization if a single +byte nop (0x90) is explicitly specified as the fill byte for alignment. @cindex @samp{--divide} option, i386 @item --divide -- 2.34.1