Patch ieee128-lib-patch010b
This commit is contained in:
Michael Meissner
parent
03831dcc98
commit
3338afa4a3
@ -1,3 +1,15 @@
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2020-05-05 Michael Meissner <meissner@linux.ibm.com>
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(ieee128-lib-patch010b)
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* config.host (powerpc*-*-linux): Add support if glibc does not
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provide the appropriate IEEE 128-bit conversions to/from Decimal.
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* config/rs6000/float128-decimal.c: New file.
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* config/rs6000/float128-decimal.ver: New file.
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* config/rs6000/t-float128-decimal: New file.
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* configure.ac (powerpc*-*-linux): Add support if glibc does not
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provide the appropriate IEEE 128-bit conversions to/from Decimal.
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* configure: Regenerate.
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2020-05-05 Michael Meissner <meissner@linux.ibm.com>
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(ieee128-lib-patch003b)
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@ -1220,6 +1220,9 @@ powerpc*-*-linux*)
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if test $libgcc_cv_powerpc_float128 = yes; then
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tmake_file="${tmake_file} rs6000/t-float128"
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if test $libgcc_cv_powerpc_float128_dec = no; then
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tmake_file="${tmake_file} rs6000/t-float128-decimal"
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fi
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fi
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if test $libgcc_cv_powerpc_float128_hw = yes; then
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@ -0,0 +1,78 @@
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/* Provide missing conversions between IEEE 128-bit floating point and Decimal
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floating point for PowerPC.
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Michael Meissner (meissner@linux.ibm.com)
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file into
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combinations with other programs, and to distribute those
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combinations without any restriction coming from the use of this
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file. (The Lesser General Public License restrictions do apply in
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other respects; for example, they cover modification of the file,
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and distribution when not linked into a combine executable.)
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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extern __float128 __dpd_trunctdkf (_Decimal128);
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extern __float128 __dpd_truncddkf (_Decimal64);
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extern __float128 __dpd_truncsdkf (_Decimal64);
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extern _Decimal128 __dpd_extendkftd (__float128);
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extern _Decimal64 __dpd_trunckfdd (__float128);
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extern _Decimal32 __dpd_trunckfsd (__float128);
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__float128
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__dpd_trunctdkf (_Decimal128 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (__float128) ibm;
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}
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__float128
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__dpd_truncddkf (_Decimal64 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (__float128) ibm;
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}
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__float128
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__dpd_truncsdkf (_Decimal64 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (__float128) ibm;
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}
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_Decimal128
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__dpd_extendkftd (__float128 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (_Decimal128) ibm;
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}
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_Decimal64
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__dpd_trunckfdd (__float128 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (_Decimal64) ibm;
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}
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_Decimal32
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__dpd_trunckfsd (__float128 x)
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{
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__ibm128 ibm = (__ibm128) x;
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return (_Decimal32) ibm;
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}
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@ -0,0 +1,7 @@
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GCC_10.0.0 {
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# float128 <-> decimal conversions
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__dpd_extendkftd
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__dpd_trunckfdd
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__dpd_trunckfsd
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__dpd_trunctdkf
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}
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@ -0,0 +1,7 @@
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# Add support for doing conversions between IEEE 128-bit floating point and
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# Decimal types if glibc does not provide the necessary functions.
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LIB2ADD += $(srcdir)/config/rs6000/float128-decimal.c
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SHLIB_MAPFILES += $(srcdir)/config/rs6000/float128-decimal.ver
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float128-decimal$(objext) : INTERNAL_CFLAGS += -mno-gnu-attribute
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108
libgcc/configure
vendored
108
libgcc/configure
vendored
@ -1801,6 +1801,52 @@ $as_echo "$ac_res" >&6; }
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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} # ac_fn_c_check_header_preproc
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# ac_fn_c_try_link LINENO
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# -----------------------
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# Try to link conftest.$ac_ext, and return whether this succeeded.
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ac_fn_c_try_link ()
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{
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as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
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rm -f conftest.$ac_objext conftest$ac_exeext
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if { { ac_try="$ac_link"
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case "(($ac_try" in
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*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
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*) ac_try_echo=$ac_try;;
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esac
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eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
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$as_echo "$ac_try_echo"; } >&5
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(eval "$ac_link") 2>conftest.err
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ac_status=$?
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if test -s conftest.err; then
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grep -v '^ *+' conftest.err >conftest.er1
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cat conftest.er1 >&5
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mv -f conftest.er1 conftest.err
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fi
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; } && {
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test -z "$ac_c_werror_flag" ||
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test ! -s conftest.err
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} && test -s conftest$ac_exeext && {
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test "$cross_compiling" = yes ||
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test -x conftest$ac_exeext
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}; then :
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ac_retval=0
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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ac_retval=1
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fi
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# Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
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# created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
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# interfere with the next link command; also delete a directory that is
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# left behind by Apple's compiler. We do this before executing the actions.
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rm -rf conftest.dSYM conftest_ipa8_conftest.oo
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eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
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as_fn_set_status $ac_retval
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} # ac_fn_c_try_link
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cat >config.log <<_ACEOF
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This file contains any messages produced by compilers while
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running configure, to aid debugging if configure makes a mistake.
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@ -5201,7 +5247,9 @@ case ${host} in
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# At present, we cannot turn -mfloat128 on via #pragma GCC target, so just
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# check if we have VSX (ISA 2.06) support to build the software libraries, and
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# whether the assembler can handle xsaddqp for hardware support. Also check if
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# a new glibc is being used so that __builtin_cpu_supports can be used.
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# a new glibc is being used so that __builtin_cpu_supports can be used. Check
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# to see if glibc provides the necessary decimal <-> IEEE 128 function, and
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# arrange to build our own version if they are not provided.
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powerpc*-*-linux*)
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128"
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@ -5258,6 +5306,64 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128_hw" >&5
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$as_echo "$libgcc_cv_powerpc_float128_hw" >&6; }
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PowerPC convert __float128 to/from _Decimal libraries" >&5
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$as_echo_n "checking for PowerPC convert __float128 to/from _Decimal libraries... " >&6; }
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if ${libgcc_cv_powerpc_float128_dec+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <stdlib.h>
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__attribute__((noinline)) __float128 f128_from_d128 (_Decimal128 d128)
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{
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return (__float128)d128;
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}
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__attribute__((noinline)) __float128 f128_from_d64 (_Decimal128 d64)
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{
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return (__float128)d64;
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}
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__attribute__((noinline)) __float128 f128_from_d32 (_Decimal128 d32)
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{
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return (__float128)d32;
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}
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__attribute__((noinline)) _Decimal128 d128_from_f128 (__float128 f128)
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{
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return (_Decimal128)f128;
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}
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__attribute__((noinline)) _Decimal64 d64_from_f128 (__float128 f128)
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{
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return (_Decimal64)f128;
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}
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__attribute__((noinline)) _Decimal32 d32_from_f128 (__float128 f128)
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{
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return (_Decimal32)f128;
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}
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int main (void)
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{
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__float128 five = 5.0;
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if (f128_from_d128 (5.0dl) != five
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|| f128_from_d64 (5.0dd) != five
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|| f128_from_d32 (5.0df) != five
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|| d128_from_f128 (five) != 5.0dl
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|| d64_from_f128 (five) != 5.0dd
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|| d32_from_f128 (five) != 5.0df)
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abort ();
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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libgcc_cv_powerpc_float128_dec=yes
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else
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libgcc_cv_powerpc_float128_dec=no
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128_dec" >&5
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$as_echo "$libgcc_cv_powerpc_float128_dec" >&6; }
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CFLAGS="$saved_CFLAGS"
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esac
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@ -424,7 +424,9 @@ case ${host} in
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# At present, we cannot turn -mfloat128 on via #pragma GCC target, so just
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# check if we have VSX (ISA 2.06) support to build the software libraries, and
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# whether the assembler can handle xsaddqp for hardware support. Also check if
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# a new glibc is being used so that __builtin_cpu_supports can be used.
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# a new glibc is being used so that __builtin_cpu_supports can be used. Check
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# to see if glibc provides the necessary decimal <-> IEEE 128 function, and
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# arrange to build our own version if they are not provided.
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powerpc*-*-linux*)
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128"
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@ -457,6 +459,48 @@ powerpc*-*-linux*)
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__attribute__ ((__ifunc__ ("add_resolver")));])],
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[libgcc_cv_powerpc_float128_hw=yes],
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[libgcc_cv_powerpc_float128_hw=no])])
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AC_CACHE_CHECK([for PowerPC convert __float128 to/from _Decimal libraries],
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[libgcc_cv_powerpc_float128_dec],
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[AC_LINK_IFELSE(
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[AC_LANG_SOURCE([#include <stdlib.h>
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__attribute__((noinline)) __float128 f128_from_d128 (_Decimal128 d128)
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{
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return (__float128)d128;
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}
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__attribute__((noinline)) __float128 f128_from_d64 (_Decimal128 d64)
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{
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return (__float128)d64;
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}
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__attribute__((noinline)) __float128 f128_from_d32 (_Decimal128 d32)
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{
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return (__float128)d32;
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}
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__attribute__((noinline)) _Decimal128 d128_from_f128 (__float128 f128)
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{
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return (_Decimal128)f128;
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}
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__attribute__((noinline)) _Decimal64 d64_from_f128 (__float128 f128)
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{
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return (_Decimal64)f128;
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}
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__attribute__((noinline)) _Decimal32 d32_from_f128 (__float128 f128)
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{
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return (_Decimal32)f128;
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}
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int main (void)
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{
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__float128 five = 5.0;
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if (f128_from_d128 (5.0dl) != five
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|| f128_from_d64 (5.0dd) != five
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|| f128_from_d32 (5.0df) != five
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|| d128_from_f128 (five) != 5.0dl
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|| d64_from_f128 (five) != 5.0dd
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|| d32_from_f128 (five) != 5.0df)
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abort ();
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return 0;
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}])],
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[libgcc_cv_powerpc_float128_dec=yes],
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[libgcc_cv_powerpc_float128_dec=no])])
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CFLAGS="$saved_CFLAGS"
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esac
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