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md.texi (machine constraints): Document 'Q', 'R', 'e' and 'Z' constraints.

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* md.texi (machine constraints): Document 'Q', 'R', 'e' and 'Z'
	constraints.

From-SVN: r40475
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Jan Hubicka 2001-03-14 22:40:22 +01:00 committed by Jan Hubicka
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2 changed files with 26 additions and 1 deletions
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@ -1,3 +1,9 @@
Wed Mar 14 22:39:12 CET 2001 Jan Hubicka <jh@suse.cz>
Vojtech Pavlik
* md.texi (machine constraints): Document 'Q', 'R', 'e' and 'Z'
constraints.
Wed Mar 14 22:26:10 CET 2001 Jan Hubicka <jh@suse.cz>
* i386.c (ix86_cmodel_string, ix86_cmodel): Define.

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gcc/md.texi
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@ -1538,7 +1538,18 @@ System V Release 4 small data area reference
@item Intel 386---@file{i386.h}
@table @code
@item q
@samp{a}, @code{b}, @code{c}, or @code{d} register
@samp{a}, @code{b}, @code{c}, or @code{d} register for the i386.
For x86-64 it is equivalent to @samp{r} class. (for 8bit instrucitons that
do not use upper halves)
@item Q
@samp{a}, @code{b}, @code{c}, or @code{d} register. (for 8bit instructions,
that do use upper halves)
@item R
Legacy register --- equivalent to @code{r} class in i386 mode.
(for non-8bit registers used together with 8bit upper halves in a single
instruction)
@item A
@samp{a}, or @code{d} register (for 64-bit ints)
@ -1588,6 +1599,14 @@ Constant in range 0 to 63 (for 64 bit shifts)
@item N
Constant in range 0 to 255 (for @code{out} instruction)
@item Z
Constant in range 0 to 0xffffffff or symbolic reference known to fit specified range.
(for using immediates in zero extending 32bit to 64bit x86-64 instructions)
@item e
Constant in range -2147483648 to 2147483647 or symbolic reference known to fit specified range.
(for using immediates in 64bit x86-64 instructions)
@item G
Standard 80387 floating point constant
@end table