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mips: fix testsuite build for O32 FPXX ABI on pre-R2 CPU

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On MIPS when the toolchain is using the O32 FPXX ABI, the testsuite
fails to build for pre-R2 CPU.

It assumes that it is possible to use the -mfp64 option to build
tst-abi-fp64amod and tst-abi-fp64mod, while this requires a CPU which
supports the mfhc1 and mthc1 instructions, ie at least a R2 CPU:

  error: '-mgp32' and '-mfp64' can only be combined if the target
  supports the mfhc1 and mthc1 instructions

The same way it assumes that it is possible to use the -modd-spreg option
to build tst-abi-fpxxomod and tst-abi-fp64mod, while this requires at
least a R1 CPU:

  warning: the 'mips2' architecture does not support odd
  single-precision registers

This patches changes that by checking the usability of -mfp64 and
-modd-spreg options in configure, and disable those tests when they can
not be used.
This commit is contained in:
Aurelien Jarno
2015-12-07 23:07:17 +01:00
parent 3b51c390f7
commit 578d080544
4 changed files with 54 additions and 0 deletions
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27
sysdeps/unix/sysv/linux/mips/configure vendored
View File

@ -106,6 +106,8 @@ if test -z "$libc_mips_float"; then
fi
libc_mips_o32_fp=
libc_cv_mips_fp64=
libc_cv_mips_modd_spreg=
if test x"$libc_mips_abi" = xo32 -a x"$libc_mips_float" = xhard; then
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@ -219,9 +221,34 @@ fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
if { ac_try='${CC-cc} -mfp64 -xc /dev/null -S -o /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then :
libc_cv_mips_fp64=yes
else
libc_cv_mips_fp64=no
fi
if { ac_try='${CC-cc} -Werror -modd-spreg -xc /dev/null -S -o /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then :
libc_cv_mips_modd_spreg=yes
else
libc_cv_mips_modd_spreg=no
fi
fi
config_vars="$config_vars
o32-fpabi = ${libc_mips_o32_fp}"
config_vars="$config_vars
has-mpf64 = ${libc_cv_mips_fp64}"
config_vars="$config_vars
has-modd-spreg = ${libc_cv_mips_modd_spreg}"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */