Hello,
The attached patch adds some SH target options that have been missing in
the documentation.
Tested with 'make info dvi pdf'.
OK to commit?
Cheers,
Oleg
2012-02-28 Oleg Endo <[email protected]>
* doc/invoke.texi (-msoft-atomic): Add more detailed
description.
(-mbranch-cost, -mcbranchdi -mcmpeqdi -mfused-madd
-mpretend-cmove): New.
Index: gcc/doc/invoke.texi
===================================================================
--- gcc/doc/invoke.texi (revision 184589)
+++ gcc/doc/invoke.texi (working copy)
@@ -886,7 +886,8 @@
-mprefergot -musermode -multcost=@var{number} -mdiv=@var{strategy} @gol
-mdivsi3_libfunc=@var{name} -mfixed-range=@var{register-range} @gol
-madjust-unroll -mindexed-addressing -mgettrcost=@var{number} -mpt-fixed @gol
--maccumulate-outgoing-args -minvalid-symbols -msoft-atomic}
+-maccumulate-outgoing-args -minvalid-symbols -msoft-atomic @gol
+-mbranch-cost=@var{num} -mcbranchdi -mcmpeqdi -mfused-madd -mpretend-cmove}
@emph{Solaris 2 Options}
@gccoptlist{-mimpure-text -mno-impure-text @gol
@@ -17817,8 +17818,12 @@
@item -msoft-atomic
@opindex msoft-atomic
-Generate software atomic sequences for the atomic operations.
-This is the default when the target is @code{sh-*-linux*}.
+Generate GNU/Linux compatible gUSA software atomic sequences for the atomic
+built-in functions. The generated atomic sequences require support from the
+interrupt / exception handling code of the system and are only suitable for
+single-core systems. They will not perform correctly on multi-core systems.
+This option is enabled by default when the target is @code{sh-*-linux*}.
+For details on the atomic built-in functions see @ref{__atomic Builtins}.
@item -mspace
@opindex mspace
@@ -17949,6 +17954,35 @@
This option is only meaningful when @option{-mno-pt-fixed} is in effect.
It will then prevent cross-basic-block cse, hoisting and most scheduling
of symbol loads. The default is @option{-mno-invalid-symbols}.
+
+@item -mbranch-cost=@var{num}
+@opindex mbranch-cost=@var{num}
+Assume @var{num} to be the cost for a branch instruction. Higher numbers
+will make the compiler try to generate more branch-free code if possible.
+If not specified the value is selected depending on the processor type that
+is being compiled for.
+
+@item -mcbranchdi
+@opindex mcbranchdi
+Enable the @code{cbranchdi4} instruction pattern.
+
+@item -mcmpeqdi
+@opindex mcmpeqdi
+Emit the @code{cmpeqdi_t} instruction pattern even when @option{-mcbranchdi}
+is in effect.
+
+@item -mfused-madd
+@opindex mfused-madd
+Allow the usage of the @code{fmac} instruction (floating-point
+multiply-accumulate) if the processor type supports it. Enabling this
+option might generate code that produces different numeric floating-point
+results compared to strict IEEE 754 arithmetic.
+
+@item -mpretend-cmove
+@opindex mpretend-cmove
+Prefer zero-displacement conditional branches for conditional move instruction
+patterns. This can result in faster code on the SH4 processor.
+
@end table
@node Solaris 2 Options
