From 037b32b9ffec4d7e68c596a0835dee8b0d26818f Mon Sep 17 00:00:00 2001 From: Adam Nemet Date: Mon, 28 Apr 2008 17:06:28 +0000 Subject: * config/tc-mips.c (file_mips_soft_float, file_mips_single_float): New statics. (OPTION_ELF_BASE): Make room for new option macros. (OPTION_SOFT_FLOAT, OPTION_HARD_FLOAT, OPTION_SINGLE_FLOAT, OPTION_DOUBLE_FLOAT): New option macros. (md_longopts): Add msoft-float, mhard-float, msingle-float and mdouble-float. (md_parse_option): Handle OPTION_SINGLE_FLOAT, OPTION_DOUBLE_FLOAT, OPTION_SOFT_FLOAT and OPTION_HARD_FLOAT. (md_show_usage): Add -msoft-float, -mhard-float, -msingle-float and -mdouble-float. (struct mips_set_options): New fields soft_float and single_float. (mips_opts): Initialized them. Add comment for each field initializer. (mips_after_parse_args): Set them based on file_mips_soft_float and file_mips_single_float. (s_mipsset): Add support for `.set softfloat', `.set hardfloat', `.set singlefloat' and `.set doublefloat'. (is_opcode_valid): New function to invoke OPCODE_IS_MEMBER. Handle single-float and soft-float instructions here. (macro_build, mips_ip): Use it instead of OPCODE_IS_MEMBER. (is_opcode_valid_16): New function. (mips16_ip): Use it instead of OPCODE_IS_MEMBER. (macro) : Remove special-casing of r4650. * doc/c-mips.texi (-march=): Add Octeon. (MIPS Opts): Document -msoft-float and -mhard-float. Document -msingle-float and -mdouble-float. (MIPS floating-point): New section. Document `.set softfloat' and `.set hardfloat'. Document `.set singlefloat' and `.set doublefloat'. --- gas/doc/c-mips.texi | 42 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 39 insertions(+), 3 deletions(-) (limited to 'gas/doc') diff --git a/gas/doc/c-mips.texi b/gas/doc/c-mips.texi index e6fe033..136d2d2 100644 --- a/gas/doc/c-mips.texi +++ b/gas/doc/c-mips.texi @@ -32,6 +32,7 @@ Assembly Language Programming'' in the same work. * MIPS option stack:: Directives to save and restore options * MIPS ASE instruction generation overrides:: Directives to control generation of MIPS ASE instructions +* MIPS floating-point:: Directives to override floating-point options @end menu @node MIPS Opts @@ -272,7 +273,8 @@ m4kp, sb1, sb1a, loongson2e, -loongson2f +loongson2f, +octeon @end quotation For compatibility reasons, @samp{@var{n}x} and @samp{@var{b}fx} are @@ -301,10 +303,21 @@ other assemblers, which use it to turn off C style preprocessing. With @sc{gnu} @code{@value{AS}}, there is no need for @samp{-nocpp}, because the @sc{gnu} assembler itself never runs the C preprocessor. +@item -msoft-float +@itemx -mhard-float +Disable or enable floating-point instructions. Note that by default +floating-point instructions are always allowed even with CPU targets +that don't have support for these instructions. + +@item -msingle-float +@itemx -mdouble-float +Disable or enable double-precision floating-point operations. Note +that by default double-precision floating-point operations are always +allowed even with CPU targets that don't have support for these +operations. + @item --construct-floats @itemx --no-construct-floats -@cindex --construct-floats -@cindex --no-construct-floats The @code{--no-construct-floats} option disables the construction of double width floating point constants by loading the two halves of the value into the two single width floating point registers that make up @@ -579,3 +592,26 @@ in the assembly. The @code{.set nomt} directive prevents MT instructions from being accepted. Traditional @sc{mips} assemblers do not support these directives. + +@node MIPS floating-point +@section Directives to override floating-point options + +@cindex Disable floating-point instructions +@kindex @code{.set softfloat} +@kindex @code{.set hardfloat} +The directives @code{.set softfloat} and @code{.set hardfloat} provide +finer control of disabling and enabling float-point instructions. +These directives always override the default (that hard-float +instructions are accepted) or the command-line options +(@samp{-msoft-float} and @samp{-mhard-float}). + +@cindex Disable single-precision floating-point operations +@kindex @code{.set softfloat} +@kindex @code{.set hardfloat} +The directives @code{.set singlefloat} and @code{.set doublefloat} +provide finer control of disabling and enabling double-precision +float-point operations. These directives always override the default +(that double-precision operations are accepted) or the command-line +options (@samp{-msingle-float} and @samp{-mdouble-float}). + +Traditional @sc{mips} assemblers do not support these directives. -- cgit v1.1