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Remove the old movsx and movzx documentation for AT&T syntax 

* doc/c-i386.texi: Remove the old movsx and movzx documentation
	for AT&T syntax.
This commit is contained in:
H.J. Lu 2020-02-14 06:09:28 -08:00
parent 6867aac05b
commit 07d9838745
2 changed files with 5 additions and 16 deletions
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@ -1,3 +1,8 @@
2020-02-14 H.J. Lu <hongjiu.lu@intel.com>
* doc/c-i386.texi: Remove the old movsx and movzx documentation
for AT&T syntax.
2020-02-14 Jan Beulich <jbeulich@suse.com>
PR gas/25438

16
gas/doc/c-i386.texi
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@ -750,22 +750,6 @@ operand.
@end itemize
Almost all instructions have the same names in AT&T and Intel format.
There are a few exceptions. The sign extend and zero extend
instructions need two sizes to specify them. They need a size to
sign/zero extend @emph{from} and a size to zero extend @emph{to}. This
is accomplished by using two instruction mnemonic suffixes in AT&T
syntax. Base names for sign extend and zero extend are
@samp{movs@dots{}} and @samp{movz@dots{}} in AT&T syntax (@samp{movsx}
and @samp{movzx} in Intel syntax). The instruction mnemonic suffixes
are tacked on to this base name, the @emph{from} suffix before the
@emph{to} suffix. Thus, @samp{movsbl %al, %edx} is AT&T syntax for
``move sign extend @emph{from} %al @emph{to} %edx.'' Possible suffixes,
thus, are @samp{bl} (from byte to long), @samp{bw} (from byte to word),
@samp{wl} (from word to long), @samp{bq} (from byte to quadruple word),
@samp{wq} (from word to quadruple word), and @samp{lq} (from long to
quadruple word).
@cindex encoding options, i386
@cindex encoding options, x86-64