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* [glibc] Fix ldbl-128 built-in function use
@ 2023-01-05 0:03 Joseph Myers
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From: Joseph Myers @ 2023-01-05 0:03 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8f27dc1af5238adbc14000f073178ee4a2c2b3cf
commit 8f27dc1af5238adbc14000f073178ee4a2c2b3cf
Author: Joseph Myers <joseph@codesourcery.com>
Date: Thu Jan 5 00:02:54 2023 +0000
Fix ldbl-128 built-in function use
Fix the following issues with built-in function use in
sysdeps/ieee754/ldbl-128 and sysdeps/ieee754/float128:
* fabsl used __builtin_fabsf128 unconditionally, breaking the build
with GCC 6 for several architectures; it should use __builtin_fabsl
with an appropriate redirection in float128_private.h. (I'm not
particularly concerned with building glibc with GCC 6; rather, I
want to be able to run the tgmath.h tests with GCC 6, which is a
significantly different case for tgmath.h compared to GCC 7 and
later because of the lack of _FloatN / _FloatNx support in the
compiler, and at present running the tests with a compiler means
building glibc with that compiler.)
* Some (conditional) uses of built-in functions had been added to
ldbl-128 without appropriate float128_private.h remapping (there was
remapping for the macros controlling whether the built-in functions
are used, just not for the functions themselves).
* s_llrintl.c called __builtin_round not __builtin_llrintl, which is
obviously wrong.
Tested with build-many-glibcs.py for aarch64-linux-gnu, GCC 6 (where
it fixes the glibc build) and GCC 12, and with the glibc testsuite for
x86_64.
Diff:
---
sysdeps/ieee754/float128/float128_private.h | 4 ++++
sysdeps/ieee754/ldbl-128/s_fabsl.c | 2 +-
sysdeps/ieee754/ldbl-128/s_llrintl.c | 2 +-
3 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h
index 78107b1525..b786488389 100644
--- a/sysdeps/ieee754/float128/float128_private.h
+++ b/sysdeps/ieee754/float128/float128_private.h
@@ -406,7 +406,11 @@
#define __builtin_ceill __builtin_ceilf128
#define __builtin_truncl __builtin_truncf128
#define __builtin_roundl __builtin_roundf128
+#define __builtin_roundevenl __builtin_roundevenf128
+#define __builtin_lrintl __builtin_lrintf128
+#define __builtin_llrintl __builtin_llrintf128
#define __builtin_copysignl __builtin_copysignf128
+#define __builtin_fabsl __builtin_fabsf128
/* Get the constant suffix from bits/floatn-compat.h. */
#define L(x) __f128 (x)
diff --git a/sysdeps/ieee754/ldbl-128/s_fabsl.c b/sysdeps/ieee754/ldbl-128/s_fabsl.c
index f22515fec6..2e5ea3f413 100644
--- a/sysdeps/ieee754/ldbl-128/s_fabsl.c
+++ b/sysdeps/ieee754/ldbl-128/s_fabsl.c
@@ -27,6 +27,6 @@ static char rcsid[] = "$NetBSD: $";
_Float128
__fabsl (_Float128 x)
{
- return __builtin_fabsf128 (x);
+ return __builtin_fabsl (x);
}
libm_alias_ldouble (__fabs, fabs)
diff --git a/sysdeps/ieee754/ldbl-128/s_llrintl.c b/sysdeps/ieee754/ldbl-128/s_llrintl.c
index 3a5635d509..22e6e5f812 100644
--- a/sysdeps/ieee754/ldbl-128/s_llrintl.c
+++ b/sysdeps/ieee754/ldbl-128/s_llrintl.c
@@ -31,7 +31,7 @@ long long int
__llrintl (_Float128 x)
{
#if USE_LLRINTL_BUILTIN
- return __builtin_round (x);
+ return __builtin_llrintl (x);
#else
/* Use generic implementation. */
static const _Float128 two112[2] =
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2023-01-05 0:03 [glibc] Fix ldbl-128 built-in function use Joseph Myers
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