diff options
| -rw-r--r-- | libgcc/ChangeLog.meissner | 12 | ||||
| -rw-r--r-- | libgcc/config.host | 3 | ||||
| -rw-r--r-- | libgcc/config/rs6000/float128-decimal.c | 78 | ||||
| -rw-r--r-- | libgcc/config/rs6000/float128-decimal.ver | 7 | ||||
| -rw-r--r-- | libgcc/config/rs6000/t-float128-decimal | 7 | ||||
| -rwxr-xr-x | libgcc/configure | 108 | ||||
| -rw-r--r-- | libgcc/configure.ac | 46 |
7 files changed, 259 insertions, 2 deletions
diff --git a/libgcc/ChangeLog.meissner b/libgcc/ChangeLog.meissner index b76e585..2b8512e 100644 --- a/libgcc/ChangeLog.meissner +++ b/libgcc/ChangeLog.meissner @@ -1,5 +1,17 @@ 2020-05-05 Michael Meissner <meissner@linux.ibm.com> + (ieee128-lib-patch010b) + * config.host (powerpc*-*-linux): Add support if glibc does not + provide the appropriate IEEE 128-bit conversions to/from Decimal. + * config/rs6000/float128-decimal.c: New file. + * config/rs6000/float128-decimal.ver: New file. + * config/rs6000/t-float128-decimal: New file. + * configure.ac (powerpc*-*-linux): Add support if glibc does not + provide the appropriate IEEE 128-bit conversions to/from Decimal. + * configure: Regenerate. + +2020-05-05 Michael Meissner <meissner@linux.ibm.com> + (ieee128-lib-patch003b) PR target/94630 * config/rs6000/t-float128 (ibm-ldouble$(objext)): Add the diff --git a/libgcc/config.host b/libgcc/config.host index 1ff4159..7b48a3d 100644 --- a/libgcc/config.host +++ b/libgcc/config.host @@ -1220,6 +1220,9 @@ powerpc*-*-linux*) if test $libgcc_cv_powerpc_float128 = yes; then tmake_file="${tmake_file} rs6000/t-float128" + if test $libgcc_cv_powerpc_float128_dec = no; then + tmake_file="${tmake_file} rs6000/t-float128-decimal" + fi fi if test $libgcc_cv_powerpc_float128_hw = yes; then diff --git a/libgcc/config/rs6000/float128-decimal.c b/libgcc/config/rs6000/float128-decimal.c index e69de29..31af26b 100644 --- a/libgcc/config/rs6000/float128-decimal.c +++ b/libgcc/config/rs6000/float128-decimal.c @@ -0,0 +1,78 @@ +/* Provide missing conversions between IEEE 128-bit floating point and Decimal + floating point for PowerPC. + + Copyright (C) 2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Michael Meissner (meissner@linux.ibm.com) + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +extern __float128 __dpd_trunctdkf (_Decimal128); +extern __float128 __dpd_truncddkf (_Decimal64); +extern __float128 __dpd_truncsdkf (_Decimal64); +extern _Decimal128 __dpd_extendkftd (__float128); +extern _Decimal64 __dpd_trunckfdd (__float128); +extern _Decimal32 __dpd_trunckfsd (__float128); + +__float128 +__dpd_trunctdkf (_Decimal128 x) +{ + __ibm128 ibm = (__ibm128) x; + return (__float128) ibm; +} + +__float128 +__dpd_truncddkf (_Decimal64 x) +{ + __ibm128 ibm = (__ibm128) x; + return (__float128) ibm; +} + +__float128 +__dpd_truncsdkf (_Decimal64 x) +{ + __ibm128 ibm = (__ibm128) x; + return (__float128) ibm; +} + +_Decimal128 +__dpd_extendkftd (__float128 x) +{ + __ibm128 ibm = (__ibm128) x; + return (_Decimal128) ibm; +} + +_Decimal64 +__dpd_trunckfdd (__float128 x) +{ + __ibm128 ibm = (__ibm128) x; + return (_Decimal64) ibm; +} + +_Decimal32 +__dpd_trunckfsd (__float128 x) +{ + __ibm128 ibm = (__ibm128) x; + return (_Decimal32) ibm; +} diff --git a/libgcc/config/rs6000/float128-decimal.ver b/libgcc/config/rs6000/float128-decimal.ver index e69de29..08c15e2 100644 --- a/libgcc/config/rs6000/float128-decimal.ver +++ b/libgcc/config/rs6000/float128-decimal.ver @@ -0,0 +1,7 @@ +GCC_10.0.0 { + # float128 <-> decimal conversions + __dpd_extendkftd + __dpd_trunckfdd + __dpd_trunckfsd + __dpd_trunctdkf +} diff --git a/libgcc/config/rs6000/t-float128-decimal b/libgcc/config/rs6000/t-float128-decimal index e69de29..2854c51 100644 --- a/libgcc/config/rs6000/t-float128-decimal +++ b/libgcc/config/rs6000/t-float128-decimal @@ -0,0 +1,7 @@ +# Add support for doing conversions between IEEE 128-bit floating point and +# Decimal types if glibc does not provide the necessary functions. + +LIB2ADD += $(srcdir)/config/rs6000/float128-decimal.c +SHLIB_MAPFILES += $(srcdir)/config/rs6000/float128-decimal.ver + +float128-decimal$(objext) : INTERNAL_CFLAGS += -mno-gnu-attribute diff --git a/libgcc/configure b/libgcc/configure index 26bf757..943086e 100755 --- a/libgcc/configure +++ b/libgcc/configure @@ -1801,6 +1801,52 @@ $as_echo "$ac_res" >&6; } eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno } # ac_fn_c_check_header_preproc + +# ac_fn_c_try_link LINENO +# ----------------------- +# Try to link conftest.$ac_ext, and return whether this succeeded. +ac_fn_c_try_link () +{ + as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack + rm -f conftest.$ac_objext conftest$ac_exeext + if { { ac_try="$ac_link" +case "(($ac_try" in + *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; + *) ac_try_echo=$ac_try;; +esac +eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\"" +$as_echo "$ac_try_echo"; } >&5 + (eval "$ac_link") 2>conftest.err + ac_status=$? + if test -s conftest.err; then + grep -v '^ *+' conftest.err >conftest.er1 + cat conftest.er1 >&5 + mv -f conftest.er1 conftest.err + fi + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; } && { + test -z "$ac_c_werror_flag" || + test ! -s conftest.err + } && test -s conftest$ac_exeext && { + test "$cross_compiling" = yes || + test -x conftest$ac_exeext + }; then : + ac_retval=0 +else + $as_echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_retval=1 +fi + # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information + # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would + # interfere with the next link command; also delete a directory that is + # left behind by Apple's compiler. We do this before executing the actions. + rm -rf conftest.dSYM conftest_ipa8_conftest.oo + eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno + as_fn_set_status $ac_retval + +} # ac_fn_c_try_link cat >config.log <<_ACEOF This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake. @@ -5201,7 +5247,9 @@ case ${host} in # At present, we cannot turn -mfloat128 on via #pragma GCC target, so just # check if we have VSX (ISA 2.06) support to build the software libraries, and # whether the assembler can handle xsaddqp for hardware support. Also check if -# a new glibc is being used so that __builtin_cpu_supports can be used. +# a new glibc is being used so that __builtin_cpu_supports can be used. Check +# to see if glibc provides the necessary decimal <-> IEEE 128 function, and +# arrange to build our own version if they are not provided. powerpc*-*-linux*) saved_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" @@ -5258,6 +5306,64 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128_hw" >&5 $as_echo "$libgcc_cv_powerpc_float128_hw" >&6; } + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PowerPC convert __float128 to/from _Decimal libraries" >&5 +$as_echo_n "checking for PowerPC convert __float128 to/from _Decimal libraries... " >&6; } +if ${libgcc_cv_powerpc_float128_dec+:} false; then : + $as_echo_n "(cached) " >&6 +else + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include <stdlib.h> + __attribute__((noinline)) __float128 f128_from_d128 (_Decimal128 d128) + { + return (__float128)d128; + } + __attribute__((noinline)) __float128 f128_from_d64 (_Decimal128 d64) + { + return (__float128)d64; + } + __attribute__((noinline)) __float128 f128_from_d32 (_Decimal128 d32) + { + return (__float128)d32; + } + __attribute__((noinline)) _Decimal128 d128_from_f128 (__float128 f128) + { + return (_Decimal128)f128; + } + __attribute__((noinline)) _Decimal64 d64_from_f128 (__float128 f128) + { + return (_Decimal64)f128; + } + __attribute__((noinline)) _Decimal32 d32_from_f128 (__float128 f128) + { + return (_Decimal32)f128; + } + int main (void) + { + __float128 five = 5.0; + if (f128_from_d128 (5.0dl) != five + || f128_from_d64 (5.0dd) != five + || f128_from_d32 (5.0df) != five + || d128_from_f128 (five) != 5.0dl + || d64_from_f128 (five) != 5.0dd + || d32_from_f128 (five) != 5.0df) + abort (); + return 0; + } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + libgcc_cv_powerpc_float128_dec=yes +else + libgcc_cv_powerpc_float128_dec=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgcc_cv_powerpc_float128_dec" >&5 +$as_echo "$libgcc_cv_powerpc_float128_dec" >&6; } CFLAGS="$saved_CFLAGS" esac diff --git a/libgcc/configure.ac b/libgcc/configure.ac index bff6e54..4aa03a4 100644 --- a/libgcc/configure.ac +++ b/libgcc/configure.ac @@ -424,7 +424,9 @@ case ${host} in # At present, we cannot turn -mfloat128 on via #pragma GCC target, so just # check if we have VSX (ISA 2.06) support to build the software libraries, and # whether the assembler can handle xsaddqp for hardware support. Also check if -# a new glibc is being used so that __builtin_cpu_supports can be used. +# a new glibc is being used so that __builtin_cpu_supports can be used. Check +# to see if glibc provides the necessary decimal <-> IEEE 128 function, and +# arrange to build our own version if they are not provided. powerpc*-*-linux*) saved_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -mabi=altivec -mvsx -mfloat128" @@ -457,6 +459,48 @@ powerpc*-*-linux*) __attribute__ ((__ifunc__ ("add_resolver")));])], [libgcc_cv_powerpc_float128_hw=yes], [libgcc_cv_powerpc_float128_hw=no])]) + AC_CACHE_CHECK([for PowerPC convert __float128 to/from _Decimal libraries], + [libgcc_cv_powerpc_float128_dec], + [AC_LINK_IFELSE( + [AC_LANG_SOURCE([#include <stdlib.h> + __attribute__((noinline)) __float128 f128_from_d128 (_Decimal128 d128) + { + return (__float128)d128; + } + __attribute__((noinline)) __float128 f128_from_d64 (_Decimal128 d64) + { + return (__float128)d64; + } + __attribute__((noinline)) __float128 f128_from_d32 (_Decimal128 d32) + { + return (__float128)d32; + } + __attribute__((noinline)) _Decimal128 d128_from_f128 (__float128 f128) + { + return (_Decimal128)f128; + } + __attribute__((noinline)) _Decimal64 d64_from_f128 (__float128 f128) + { + return (_Decimal64)f128; + } + __attribute__((noinline)) _Decimal32 d32_from_f128 (__float128 f128) + { + return (_Decimal32)f128; + } + int main (void) + { + __float128 five = 5.0; + if (f128_from_d128 (5.0dl) != five + || f128_from_d64 (5.0dd) != five + || f128_from_d32 (5.0df) != five + || d128_from_f128 (five) != 5.0dl + || d64_from_f128 (five) != 5.0dd + || d32_from_f128 (five) != 5.0df) + abort (); + return 0; + }])], + [libgcc_cv_powerpc_float128_dec=yes], + [libgcc_cv_powerpc_float128_dec=no])]) CFLAGS="$saved_CFLAGS" esac |