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| author | Jan Hubicka <jh@suse.cz> | 2001-03-14 22:40:22 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-03-14 21:40:22 +0000 |
| commit | 0c56474ec65531277740452b869bd643ad6424f5 (patch) | |
| tree | e9e33f050f594437c73907c1b8e598dd90367bfe | |
| parent | 6189a572989970b67d3dcf83a36ad1c5350d7746 (diff) | |
| download | gcc-0c56474ec65531277740452b869bd643ad6424f5.zip gcc-0c56474ec65531277740452b869bd643ad6424f5.tar.gz gcc-0c56474ec65531277740452b869bd643ad6424f5.tar.bz2 | |
md.texi (machine constraints): Document 'Q', 'R', 'e' and 'Z' constraints.
* md.texi (machine constraints): Document 'Q', 'R', 'e' and 'Z'
constraints.
From-SVN: r40475
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/md.texi | 21 |
2 files changed, 26 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d4997cb..0f3b969 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/md.texi b/gcc/md.texi index 3a8f8e2..411f67f 100644 --- a/gcc/md.texi +++ b/gcc/md.texi @@ -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 |