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invoke.texi (MIPS Options): Document -mno-float.

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2012-07-30  Sandra Loosemore  <sandra@codesourcery.com>
	    Julian Brown  <julian@codesourcery.com>

	gcc/
	* doc/invoke.texi (MIPS Options): Document -mno-float.
	* config/mips/mips.h (MIPS_ARCH_FLOAT_SPEC): Make it know
	about -mno-float.

Co-Authored-By: Julian Brown <julian@codesourcery.com>

From-SVN: r189989
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Sandra Loosemore 2012-07-30 17:49:40 -04:00 committed by Sandra Loosemore
parent 9a99299d55
commit 3df0998b48
3 changed files with 22 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-07-30 Sandra Loosemore <sandra@codesourcery.com>
Julian Brown <julian@codesourcery.com>
* doc/invoke.texi (MIPS Options): Document -mno-float.
* config/mips/mips.h (MIPS_ARCH_FLOAT_SPEC): Make it know
about -mno-float.
2012-07-30 Joseph Myers <joseph@codesourcery.com>
* doc/sourcebuild.texi (Subdirectories): Document common

2
gcc/config/mips/mips.h
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@ -713,7 +713,7 @@ struct mips_cpu_info {
link-compatible. */
#define MIPS_ARCH_FLOAT_SPEC \
"%{mhard-float|msoft-float|march=mips*:; \
"%{mhard-float|msoft-float|mno-float|march=mips*:; \
march=vr41*|march=m4k|march=4k*|march=24kc|march=24kec \
|march=34kc|march=74kc|march=1004kc|march=5kc \
|march=octeon|march=xlr: -msoft-float; \

15
gcc/doc/invoke.texi
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@ -733,7 +733,8 @@ Objective-C and Objective-C++ Dialects}.
-mabi=@var{abi} -mabicalls -mno-abicalls @gol
-mshared -mno-shared -mplt -mno-plt -mxgot -mno-xgot @gol
-mgp32 -mgp64 -mfp32 -mfp64 -mhard-float -msoft-float @gol
-msingle-float -mdouble-float -mdsp -mno-dsp -mdspr2 -mno-dspr2 @gol
-mno-float -msingle-float -mdouble-float @gol
-mdsp -mno-dsp -mdspr2 -mno-dspr2 @gol
-mmcu -mmno-mcu @gol
-mfpu=@var{fpu-type} @gol
-msmartmips -mno-smartmips @gol
@ -15633,6 +15634,18 @@ Use floating-point coprocessor instructions.
Do not use floating-point coprocessor instructions. Implement
floating-point calculations using library calls instead.
@item -mno-float
@opindex mno-float
Equivalent to @option{-msoft-float}, but additionally asserts that the
program being compiled does not perform any floating-point operations.
This option is presently supported only by some bare-metal MIPS
configurations, where it may select a special set of libraries
that lack all floating-point support (including, for example, the
floating-point @code{printf} formats).
If code compiled with @code{-mno-float} accidentally contains
floating-point operations, it is likely to suffer a link-time
or run-time failure.
@item -msingle-float
@opindex msingle-float
Assume that the floating-point coprocessor only supports single-precision