From: Stefan Liebler <stli@linux.ibm.com>
To: libc-alpha@sourceware.org
Cc: Stefan Liebler <stli@linux.ibm.com>
Subject: [PATCH 11/13] Use GCC builtins for trunc functions if desired.
Date: Mon, 02 Dec 2019 15:10:00 -0000 [thread overview]
Message-ID: <1575297977-2589-12-git-send-email-stli@linux.ibm.com> (raw)
In-Reply-To: <1575297977-2589-1-git-send-email-stli@linux.ibm.com>
This patch is using the corresponding GCC builtin for truncf, trunc,
truncl and truncf128 if the USE_FUNCTION_BUILTIN macros are defined to one
in math-use-builtins.h.
This is the case for s390 if build with at least --march=z196 --mzarch.
Otherwise the generic implementation is used.
---
sysdeps/generic/math-use-builtins.h | 5 +++++
sysdeps/ieee754/dbl-64/s_trunc.c | 6 +++++-
sysdeps/ieee754/float128/float128_private.h | 3 +++
sysdeps/ieee754/flt-32/s_truncf.c | 6 +++++-
sysdeps/ieee754/ldbl-128/s_truncl.c | 6 +++++-
sysdeps/s390/fpu/math-use-builtins.h | 6 ++++++
6 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h
index 076ec661b0..ab379f45ba 100644
--- a/sysdeps/generic/math-use-builtins.h
+++ b/sysdeps/generic/math-use-builtins.h
@@ -41,4 +41,9 @@
#define USE_CEILL_BUILTIN 0
#define USE_CEILF128_BUILTIN 0
+#define USE_TRUNC_BUILTIN 0
+#define USE_TRUNCF_BUILTIN 0
+#define USE_TRUNCL_BUILTIN 0
+#define USE_TRUNCF128_BUILTIN 0
+
#endif /* math-use-builtins.h */
diff --git a/sysdeps/ieee754/dbl-64/s_trunc.c b/sysdeps/ieee754/dbl-64/s_trunc.c
index 0de68ce298..6189ba4a31 100644
--- a/sysdeps/ieee754/dbl-64/s_trunc.c
+++ b/sysdeps/ieee754/dbl-64/s_trunc.c
@@ -22,11 +22,14 @@
#include <math_private.h>
#include <libm-alias-double.h>
-
+#include <math-use-builtins.h>
double
__trunc (double x)
{
+#if USE_TRUNC_BUILTIN
+ return __builtin_trunc (x);
+#else
int64_t i0, j0;
int64_t sx;
@@ -49,6 +52,7 @@ __trunc (double x)
}
return x;
+#endif /* USE_TRUNC_BUILTIN */
}
#ifndef __trunc
libm_alias_double (__trunc, trunc)
diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h
index 01881b574a..9cd3a63f11 100644
--- a/sysdeps/ieee754/float128/float128_private.h
+++ b/sysdeps/ieee754/float128/float128_private.h
@@ -148,6 +148,8 @@
#define USE_FLOORL_BUILTIN USE_FLOORF128_BUILTIN
#undef USE_CEILL_BUILTIN
#define USE_CEILL_BUILTIN USE_CEILF128_BUILTIN
+#undef USE_TRUNCL_BUILTIN
+#define USE_TRUNCL_BUILTIN USE_TRUNCF128_BUILTIN
/* IEEE function renames. */
#define __ieee754_acoshl __ieee754_acoshf128
@@ -355,6 +357,7 @@
#define __builtin_rintl __builtin_rintf128
#define __builtin_floorl __builtin_floorf128
#define __builtin_ceill __builtin_ceilf128
+#define __builtin_truncl __builtin_truncf128
/* Get the constant suffix from bits/floatn-compat.h. */
#define L(x) __f128 (x)
diff --git a/sysdeps/ieee754/flt-32/s_truncf.c b/sysdeps/ieee754/flt-32/s_truncf.c
index e587706b5b..de6dc24a3f 100644
--- a/sysdeps/ieee754/flt-32/s_truncf.c
+++ b/sysdeps/ieee754/flt-32/s_truncf.c
@@ -22,11 +22,14 @@
#include <math_private.h>
#include <libm-alias-float.h>
-
+#include <math-use-builtins.h>
float
__truncf (float x)
{
+#if USE_TRUNCF_BUILTIN
+ return __builtin_truncf (x);
+#else
int32_t i0, j0;
int sx;
@@ -49,6 +52,7 @@ __truncf (float x)
}
return x;
+#endif /* USE_TRUNCF_BUILTIN */
}
#ifndef __truncf
libm_alias_float (__trunc, trunc)
diff --git a/sysdeps/ieee754/ldbl-128/s_truncl.c b/sysdeps/ieee754/ldbl-128/s_truncl.c
index de4dd34d59..ca62e2f970 100644
--- a/sysdeps/ieee754/ldbl-128/s_truncl.c
+++ b/sysdeps/ieee754/ldbl-128/s_truncl.c
@@ -23,11 +23,14 @@
#include <math_private.h>
#include <libm-alias-ldouble.h>
-
+#include <math-use-builtins.h>
_Float128
__truncl (_Float128 x)
{
+#if USE_TRUNCL_BUILTIN
+ return __builtin_truncl (x);
+#else
int32_t j0;
uint64_t i0, i1, sx;
@@ -54,5 +57,6 @@ __truncl (_Float128 x)
}
return x;
+#endif /* USE_TRUNCL_BUILTIN */
}
libm_alias_ldouble (__trunc, trunc)
diff --git a/sysdeps/s390/fpu/math-use-builtins.h b/sysdeps/s390/fpu/math-use-builtins.h
index dc364edaa8..1d88a2c40f 100644
--- a/sysdeps/s390/fpu/math-use-builtins.h
+++ b/sysdeps/s390/fpu/math-use-builtins.h
@@ -42,16 +42,22 @@
# define USE_CEILF_BUILTIN 1
# define USE_CEILL_BUILTIN 1
+# define USE_TRUNC_BUILTIN 1
+# define USE_TRUNCF_BUILTIN 1
+# define USE_TRUNCL_BUILTIN 1
+
# if __GNUC_PREREQ (8, 1)
# define USE_NEARBYINTF128_BUILTIN 1
# define USE_RINTF128_BUILTIN 1
# define USE_FLOORF128_BUILTIN 1
# define USE_CEILF128_BUILTIN 1
+# define USE_TRUNCF128_BUILTIN 1
# else
# define USE_NEARBYINTF128_BUILTIN 0
# define USE_RINTF128_BUILTIN 0
# define USE_FLOORF128_BUILTIN 0
# define USE_CEILF128_BUILTIN 0
+# define USE_TRUNCF128_BUILTIN 0
# endif
#else
--
2.19.1
next prev parent reply other threads:[~2019-12-02 15:10 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-02 14:46 [PATCH 00/13] Use GCC builtins for some math " Stefan Liebler
2019-12-02 14:46 ` [PATCH 02/13] Always use wordsize-64 version of s_rint.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 03/13] Always use wordsize-64 version of s_floor.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 07/13] Use GCC builtins for nearbyint functions if desired Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 05/13] Always use wordsize-64 version of s_trunc.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 01/13] Always use wordsize-64 version of s_nearbyint.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 09/13] Use GCC builtins for floor functions if desired Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 14:46 ` [PATCH 08/13] Use GCC builtins for rint " Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 15:10 ` Stefan Liebler [this message]
2019-12-05 20:40 ` [PATCH 11/13] Use GCC builtins for trunc " Adhemerval Zanella
2019-12-02 15:15 ` [PATCH 04/13] Always use wordsize-64 version of s_ceil.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 15:18 ` [PATCH 10/13] Use GCC builtins for ceil functions if desired Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 15:46 ` [PATCH 06/13] Always use wordsize-64 version of s_round.c Stefan Liebler
2019-12-05 20:40 ` Adhemerval Zanella
2019-12-02 15:50 ` [PATCH 12/13] Use GCC builtins for round functions if desired Stefan Liebler
2019-12-05 20:41 ` Adhemerval Zanella
2019-12-02 15:52 ` [PATCH 13/13] Use GCC builtins for copysign " Stefan Liebler
2019-12-02 21:00 ` Joseph Myers
2019-12-03 8:27 ` Stefan Liebler
2019-12-03 16:51 ` Joseph Myers
2019-12-04 13:15 ` Stefan Liebler
2019-12-04 13:20 ` Joseph Myers
2019-12-04 16:34 ` Stefan Liebler
2019-12-04 20:43 ` Joseph Myers
2019-12-05 15:40 ` Stefan Liebler
2019-12-09 12:58 ` [PATCH 00/13] Use GCC builtins for some math " Stefan Liebler
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