From: Michael Meissner <meissner@linux.ibm.com>
To: Michael Meissner <meissner@linux.ibm.com>,
gcc-patches@gcc.gnu.org,
Segher Boessenkool <segher@kernel.crashing.org>,
David Edelsohn <dje.gcc@gmail.com>,
Bill Schmidt <wschmidt@linux.ibm.com>,
Peter Bergner <bergner@linux.ibm.com>, Jeff Law <law@redhat.com>,
Jonathan Wakely <jwakely@redhat.com>
Subject: [PATCH 6/9] PowerPC: If long double is IEEE 128-bit, map q built-ins to *l instead of *f128.
Date: Thu, 24 Sep 2020 16:40:02 -0400 [thread overview]
Message-ID: <20200924204002.GF31597@ibm-toto.the-meissners.org> (raw)
In-Reply-To: <20200924202036.GA28437@ibm-toto.the-meissners.org>
PowerPC: If long double is IEEE 128-bit, map q built-ins to *l instead of *f128.
If we map nanq to nanf128 when long double is IEEE, it seems to lose the
special signaling vs. non-signaling NAN support. This patch maps the functions
to the long double version if long double is IEEE 128-bit.
gcc/
2020-09-23 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): If long
double is IEEE-128 map the nanq built-in functions to the long
double function, not the f128 function.
---
gcc/config/rs6000/rs6000-c.c | 31 ++++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
diff --git a/gcc/config/rs6000/rs6000-c.c b/gcc/config/rs6000/rs6000-c.c
index f5982907e90..8f7a8eec740 100644
--- a/gcc/config/rs6000/rs6000-c.c
+++ b/gcc/config/rs6000/rs6000-c.c
@@ -681,15 +681,32 @@ rs6000_cpu_cpp_builtins (cpp_reader *pfile)
builtin_define ("__builtin_vsx_xvnmsubmsp=__builtin_vsx_xvnmsubsp");
}
- /* Map the old _Float128 'q' builtins into the new 'f128' builtins. */
+ /* Map the old _Float128 'q' builtins into the new 'f128' builtins if long
+ double is IBM or 64-bit.
+
+ However, if long double is IEEE 128-bit, map both sets of built-in
+ functions to the normal long double version. This shows up in nansf128
+ vs. nanf128. */
if (TARGET_FLOAT128_TYPE)
{
- builtin_define ("__builtin_fabsq=__builtin_fabsf128");
- builtin_define ("__builtin_copysignq=__builtin_copysignf128");
- builtin_define ("__builtin_nanq=__builtin_nanf128");
- builtin_define ("__builtin_nansq=__builtin_nansf128");
- builtin_define ("__builtin_infq=__builtin_inff128");
- builtin_define ("__builtin_huge_valq=__builtin_huge_valf128");
+ if (FLOAT128_IEEE_P (TFmode))
+ {
+ builtin_define ("__builtin_fabsq=__builtin_fabsl");
+ builtin_define ("__builtin_copysignq=__builtin_copysignl");
+ builtin_define ("__builtin_nanq=__builtin_nanl");
+ builtin_define ("__builtin_nansq=__builtin_nansl");
+ builtin_define ("__builtin_infq=__builtin_infl");
+ builtin_define ("__builtin_huge_valq=__builtin_huge_vall");
+ }
+ else
+ {
+ builtin_define ("__builtin_fabsq=__builtin_fabsf128");
+ builtin_define ("__builtin_copysignq=__builtin_copysignf128");
+ builtin_define ("__builtin_nanq=__builtin_nanf128");
+ builtin_define ("__builtin_nansq=__builtin_nansf128");
+ builtin_define ("__builtin_infq=__builtin_inff128");
+ builtin_define ("__builtin_huge_valq=__builtin_huge_valf128");
+ }
}
/* Tell users they can use __builtin_bswap{16,64}. */
--
2.22.0
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.ibm.com, phone: +1 (978) 899-4797
next prev parent reply other threads:[~2020-09-24 20:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 20:20 [PATCH 0/9] PowerPC: Patches to enable changing the long double default to IEEE 128-bit on little endian PowerPC 64-bit Linux systems Michael Meissner
2020-09-24 20:31 ` [PATCH 1/9] PowerPC: Map long double built-in functions if IEEE 128-bit long double Michael Meissner
2020-10-01 23:05 ` Joseph Myers
2020-10-08 5:20 ` Michael Meissner
2020-09-24 20:33 ` [PATCH 2/9] PowerPC: Update __float128 and __ibm128 error messages Michael Meissner
2020-09-24 20:34 ` [PATCH 3/9] PowerPC: Update IEEE <-> IBM 128-bit floating point conversions Michael Meissner
2020-09-24 20:35 ` [PATCH 4/9] PowerPC: Add IEEE 128-bit <-> Decimal conversions Michael Meissner
2020-09-24 20:36 ` [PATCH 5/9] PowerPC: Update tests to run if long double is IEEE 128-bit Michael Meissner
2020-09-24 20:40 ` Michael Meissner [this message]
2020-09-24 20:42 ` [PATCH 7/9] PowerPC: Update IEEE 128-bit built-in functions to work " Michael Meissner
2020-09-24 20:45 ` [PATCH 8/9] PowerPC: Change tests to use __float128 instead of __ieee128 Michael Meissner
2020-09-24 20:47 ` [PATCH 9/9] PowerPC: Use __builtin_pack_ieee128 if long double is IEEE 128-bit Michael Meissner
2020-10-09 4:35 ` [PATCH 1/9, revised] PowerPC: Map long double built-in functions if IEEE 128-bit long double Michael Meissner
2020-10-16 20:30 ` Segher Boessenkool
2020-10-19 19:30 ` Michael Meissner
2020-10-19 21:24 ` Michael Meissner
2020-10-12 23:16 ` Ping: [PATCH 0/9] PowerPC: Patches to enable changing the long double default to IEEE 128-bit on little endian PowerPC 64-bit Linux systems Michael Meissner
2020-10-16 14:37 ` Ping #2: " Michael Meissner
2020-10-16 19:14 ` Segher Boessenkool
2020-10-19 19:12 ` Michael Meissner
2020-10-19 21:50 ` Segher Boessenkool
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