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arc: Add --with-fpu support for ARCv2 cpus

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Support for a compile-time default FPU. The --with-fpu configuration
option is ignored if -mfpu compiler option is specified. The FPU
options are only available for ARCv2 cpus.

gcc/
2021-06-14  Claudiu Zissulescu  <claziss@synopsys.com>

	* config.gcc (arc): Add support for with_cpu option.
	* config/arc/arc.h (OPTION_DEFAULT_SPECS): Add fpu.

Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
This commit is contained in:
Claudiu Zissulescu 2021-06-14 15:33:17 +03:00
parent 831589c227
commit c4c47a84a1
2 changed files with 43 additions and 5 deletions
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44
gcc/config.gcc
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@ -4260,18 +4260,52 @@ case "${target}" in
;;
arc*-*-*)
supported_defaults="cpu"
supported_defaults="cpu fpu"
new_cpu=hs38_linux
if [ x"$with_cpu" = x ] \
|| grep "^ARC_CPU ($with_cpu," \
${srcdir}/config/arc/arc-cpus.def \
> /dev/null; then
|| grep -q -E "^ARC_CPU[[:blank:]]*\($with_cpu," \
${srcdir}/config/arc/arc-cpus.def
then
# Ok
true
new_cpu=$with_cpu
else
echo "Unknown cpu used in --with-cpu=$with_cpu" 1>&2
exit 1
fi
# see if --with-fpu matches any of the supported FPUs
case "$with_fpu" in
"")
# OK
;;
fpus | fpus_div | fpus_fma | fpus_all)
# OK if em or hs
flags_ok="[emhs]+"
;;
fpuda | fpuda_div | fpuda_fma | fpuda_all)
# OK only em
flags_ok="em"
;;
fpud | fpud_div | fpud_fma | fpud_all)
# OK only hs
flags_ok="hs"
;;
*)
echo "Unknown floating point type used in "\
"--with-fpu=$with_fpu" 1>&2
exit 1
;;
esac
if [ -n "$flags_ok" ] \
&& ! grep -q -E "^ARC_CPU[[:blank:]]*\($new_cpu,[[:blank:]]*$flags_ok," \
${srcdir}/config/arc/arc-cpus.def
then
echo "Unknown floating point type used in "\
"--with-fpu=$with_fpu for cpu $new_cpu" 1>&2
exit 1
fi
;;
csky-*-*)

4
gcc/config/arc/arc.h
View File

@ -100,7 +100,11 @@ extern const char *arc_cpu_to_as (int argc, const char **argv);
"%:cpu_to_as(%{mcpu=*:%*}) %{mspfp*} %{mdpfp*} " \
"%{mfpu=fpuda*:-mfpuda} %{mcode-density}"
/* Support for a compile-time default CPU and FPU. The rules are:
--with-cpu is ignored if -mcpu, mARC*, marc*, mA7, mA6 are specified.
--with-fpu is ignored if -mfpu is specified. */
#define OPTION_DEFAULT_SPECS \
{"fpu", "%{!mfpu=*:-mfpu=%(VALUE)}"}, \
{"cpu", "%{!mcpu=*:%{!mARC*:%{!marc*:%{!mA7:%{!mA6:-mcpu=%(VALUE)}}}}}" }
#ifndef DRIVER_ENDIAN_SELF_SPECS