When -mapxf is used to build glibc, the resulting glibc will never run
on FMA4 machines. Exclude FMA4 IFUNC functions when -mapxf is used.
This requires GCC which defines __APX_F__ for -mapxf with commit:
1df56719bd8 x86: Define __APX_F__ for -mapxf
Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>
/* Define if -mmovbe is enabled by default on x86. */
#undef HAVE_X86_MOVBE
+/* Define if -mapxf is enabled by default on x86. */
+#undef HAVE_X86_APX
+
#endif
config_vars="$config_vars
have-mamx-tile = $libc_cv_x86_have_amx_tile"
+# Check if -mapxf is enabled.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -mapxf is enabled" >&5
+printf %s "checking whether -mapxf is enabled... " >&6; }
+if test ${libc_cv_x86_have_apx+y}
+then :
+ printf %s "(cached) " >&6
+else $as_nop
+ cat > conftest.c <<EOF
+#ifndef __APX_F__
+# error APX isn't enabled
+#endif
+EOF
+ libc_cv_x86_have_apx=no
+ if { ac_try='${CC-cc} -c $CFLAGS conftest.c -o conftest.o 1>&5'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then
+ libc_cv_x86_have_apx=yes
+ fi
+ rm -rf conftest*
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_x86_have_apx" >&5
+printf "%s\n" "$libc_cv_x86_have_apx" >&6; }
+if test $libc_cv_x86_have_apx = yes; then
+ printf "%s\n" "#define HAVE_X86_APX 1" >>confdefs.h
+
+fi
+config_vars="$config_vars
+have-x86-apx = $libc_cv_x86_have_apx"
+
test -n "$critic_missing" && as_fn_error $? "
*** $critic_missing" "$LINENO" 5
rm -rf conftest*])
LIBC_CONFIG_VAR([have-mamx-tile], [$libc_cv_x86_have_amx_tile])
+# Check if -mapxf is enabled.
+AC_CACHE_CHECK(whether -mapxf is enabled,
+ libc_cv_x86_have_apx, [dnl
+cat > conftest.c <<EOF
+#ifndef __APX_F__
+# error APX isn't enabled
+#endif
+EOF
+ libc_cv_x86_have_apx=no
+ if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD); then
+ libc_cv_x86_have_apx=yes
+ fi
+ rm -rf conftest*])
+if test $libc_cv_x86_have_apx = yes; then
+ AC_DEFINE(HAVE_X86_APX)
+fi
+LIBC_CONFIG_VAR([have-x86-apx], [$libc_cv_x86_have_apx])
+
test -n "$critic_missing" && AC_MSG_ERROR([
*** $critic_missing])
s_truncf-avx \
# libm-sysdep_routines
else
+ifeq (no,$(have-x86-apx))
libm-sysdep_routines += \
- e_asin-fma \
e_asin-fma4 \
+ e_atan2-fma4 \
+ e_exp-fma4 \
+ e_log-fma4 \
+ e_pow-fma4 \
+ s_atan-fma4 \
+ s_sin-fma4 \
+ s_sincos-fma4 \
+ s_tan-fma4 \
+# libm-sysdep_routines
+endif
+libm-sysdep_routines += \
+ e_asin-fma \
e_atan2-avx \
e_atan2-fma \
- e_atan2-fma4 \
e_exp-avx \
e_exp-fma \
- e_exp-fma4 \
e_exp2f-fma \
e_expf-fma \
e_log-avx \
e_log-fma \
- e_log-fma4 \
e_log2-fma \
e_log2f-fma \
e_logf-fma \
e_pow-fma \
- e_pow-fma4 \
e_powf-fma \
s_atan-avx \
s_atan-fma \
- s_atan-fma4 \
s_ceil-sse4_1 \
s_ceilf-sse4_1 \
s_cosf-fma \
s_roundevenf-sse4_1 \
s_sin-avx \
s_sin-fma \
- s_sin-fma4 \
s_sincos-avx \
s_sincos-fma \
- s_sincos-fma4 \
s_sincosf-fma \
s_sincosf-sse2 \
s_sinf-fma \
s_sinf-sse2 \
s_tan-avx \
s_tan-fma \
- s_tan-fma4 \
s_trunc-sse4_1 \
s_truncf-sse4_1 \
# libm-sysdep_routines
&& CPU_FEATURE_USABLE_P (cpu_features, AVX2))
return OPTIMIZE (fma);
+#ifndef HAVE_X86_APX
if (CPU_FEATURE_USABLE_P (cpu_features, FMA4))
return OPTIMIZE (fma4);
+#endif
if (CPU_FEATURE_USABLE_P (cpu_features, AVX))
return OPTIMIZE (avx);
&& CPU_FEATURE_USABLE_P (cpu_features, AVX2))
return OPTIMIZE (fma);
+#ifndef HAVE_X86_APX
if (CPU_FEATURE_USABLE_P (cpu_features, FMA4))
return OPTIMIZE (fma4);
+#endif
return OPTIMIZE (sse2);
}