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| author | Lulu Cheng <chenglulu@loongson.cn> | 2025-04-07 10:00:27 +0800 |
|---|---|---|
| committer | Lulu Cheng <chenglulu@loongson.cn> | 2025-04-07 17:01:53 +0800 |
| commit | 1534f0099c98ea14c08a401302b05edf2231f411 (patch) | |
| tree | 2077001716bedde6067146b7b32e611eb5484005 | |
| parent | f085dbf97ed4445830127c955909ff2b887ded69 (diff) | |
| download | gcc-1534f0099c98ea14c08a401302b05edf2231f411.zip gcc-1534f0099c98ea14c08a401302b05edf2231f411.tar.gz gcc-1534f0099c98ea14c08a401302b05edf2231f411.tar.bz2 | |
LoongArch: Add LoongArch architecture detection to __float128 support in libgfortran and libquadmath [PR119408].
In GCC14, LoongArch added __float128 as an alias for _Float128.
In commit r15-8962, support for q/Q suffixes for 128-bit floating point
numbers. This will cause the compiler to automatically link libquadmath
when compiling Fortran programs. But on LoongArch `long double` is
IEEE quad, so there is no need to implement libquadmath.
This causes link failure.
PR target/119408
libgfortran/ChangeLog:
* acinclude.m4: When checking for __float128 support, determine
whether the current architecture is LoongArch. If so, return false.
* configure: Regenerate.
libquadmath/ChangeLog:
* configure.ac: When checking for __float128 support, determine
whether the current architecture is LoongArch. If so, return false.
* configure: Regenerate.
Sigend-off-by: Xi Ruoyao <xry111@xry111.site>
Sigend-off-by: Jakub Jelinek <jakub@redhat.com>
| -rw-r--r-- | libgfortran/acinclude.m4 | 4 | ||||
| -rwxr-xr-x | libgfortran/configure | 8 | ||||
| -rwxr-xr-x | libquadmath/configure | 8 | ||||
| -rw-r--r-- | libquadmath/configure.ac | 4 |
4 files changed, 24 insertions, 0 deletions
diff --git a/libgfortran/acinclude.m4 b/libgfortran/acinclude.m4 index a73207e..23fd621 100644 --- a/libgfortran/acinclude.m4 +++ b/libgfortran/acinclude.m4 @@ -274,6 +274,10 @@ AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ AC_CACHE_CHECK([whether we have a usable _Float128 type], libgfor_cv_have_float128, [ GCC_TRY_COMPILE_OR_LINK([ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + _Float128 foo (_Float128 x) { _Complex _Float128 z1, z2; diff --git a/libgfortran/configure b/libgfortran/configure index 11a1bc5..9898a94 100755 --- a/libgfortran/configure +++ b/libgfortran/configure @@ -30283,6 +30283,10 @@ else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + _Float128 foo (_Float128 x) { _Complex _Float128 z1, z2; @@ -30336,6 +30340,10 @@ fi cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + _Float128 foo (_Float128 x) { _Complex _Float128 z1, z2; diff --git a/libquadmath/configure b/libquadmath/configure index 49d7080..f82dd3d 100755 --- a/libquadmath/configure +++ b/libquadmath/configure @@ -12843,6 +12843,10 @@ else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__) typedef _Complex float __attribute__((mode(TC))) __complex128; #else @@ -12894,6 +12898,10 @@ fi cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__) typedef _Complex float __attribute__((mode(TC))) __complex128; #else diff --git a/libquadmath/configure.ac b/libquadmath/configure.ac index 349be26..c64a848 100644 --- a/libquadmath/configure.ac +++ b/libquadmath/configure.ac @@ -233,6 +233,10 @@ AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun]) AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128], [GCC_TRY_COMPILE_OR_LINK([ + #ifdef __loongarch__ + #error On LoongArch we should use long double instead; __float128 is only for porting existing code easier. + #endif + #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__) typedef _Complex float __attribute__((mode(TC))) __complex128; #else |