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188 lines
5.4 KiB
188 lines
5.4 KiB
9 months ago
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From f49dd4cc4e295803e517190d1798bd84561d56f4 Mon Sep 17 00:00:00 2001
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From: Stefan Liebler <stli@linux.ibm.com>
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Date: Wed, 11 Dec 2019 15:09:24 +0100
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Subject: [PATCH 12/28] Use GCC builtins for round functions if desired.
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This patch is using the corresponding GCC builtin for roundf, round,
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roundl and roundf128 if the USE_FUNCTION_BUILTIN macros are defined to one
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in math-use-builtins.h.
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This is the case for s390 if build with at least --march=z196 --mzarch.
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Otherwise the generic implementation is used. The code of the generic
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implementation is not changed.
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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(cherry picked from commit f82996f8159981619ac7ed8a4c1838c2ad72ab61)
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---
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sysdeps/generic/math-use-builtins.h | 5 +++++
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sysdeps/ieee754/dbl-64/s_round.c | 6 ++++++
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sysdeps/ieee754/float128/float128_private.h | 3 +++
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sysdeps/ieee754/flt-32/s_roundf.c | 6 ++++++
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sysdeps/ieee754/ldbl-128/s_roundl.c | 6 ++++++
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sysdeps/s390/fpu/math-use-builtins.h | 11 +++++++++++
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6 files changed, 37 insertions(+)
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diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h
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index ab379f45ba..34ca438a8c 100644
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--- a/sysdeps/generic/math-use-builtins.h
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+++ b/sysdeps/generic/math-use-builtins.h
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@@ -46,4 +46,9 @@
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#define USE_TRUNCL_BUILTIN 0
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#define USE_TRUNCF128_BUILTIN 0
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+#define USE_ROUND_BUILTIN 0
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+#define USE_ROUNDF_BUILTIN 0
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+#define USE_ROUNDL_BUILTIN 0
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+#define USE_ROUNDF128_BUILTIN 0
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+
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#endif /* math-use-builtins.h */
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diff --git a/sysdeps/ieee754/dbl-64/s_round.c b/sysdeps/ieee754/dbl-64/s_round.c
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index bf9922edca..1f8482adf8 100644
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--- a/sysdeps/ieee754/dbl-64/s_round.c
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+++ b/sysdeps/ieee754/dbl-64/s_round.c
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@@ -22,11 +22,16 @@
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#include <math_private.h>
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#include <libm-alias-double.h>
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#include <stdint.h>
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+#include <math-use-builtins.h>
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double
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__round (double x)
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{
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+#if USE_ROUND_BUILTIN
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+ return __builtin_round (x);
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+#else
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+ /* Use generic implementation. */
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int64_t i0, j0;
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EXTRACT_WORDS64 (i0, x);
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@@ -61,5 +66,6 @@ __round (double x)
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INSERT_WORDS64 (x, i0);
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return x;
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+#endif /* ! USE_ROUND_BUILTIN */
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}
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libm_alias_double (__round, round)
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diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h
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index e248600ec2..3297a71e44 100644
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--- a/sysdeps/ieee754/float128/float128_private.h
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+++ b/sysdeps/ieee754/float128/float128_private.h
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@@ -149,6 +149,8 @@
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#define USE_CEILL_BUILTIN USE_CEILF128_BUILTIN
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#undef USE_TRUNCL_BUILTIN
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#define USE_TRUNCL_BUILTIN USE_TRUNCF128_BUILTIN
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+#undef USE_ROUNDL_BUILTIN
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+#define USE_ROUNDL_BUILTIN USE_ROUNDF128_BUILTIN
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/* IEEE function renames. */
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#define __ieee754_acoshl __ieee754_acoshf128
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@@ -355,6 +357,7 @@
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#define __builtin_floorl __builtin_floorf128
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#define __builtin_ceill __builtin_ceilf128
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#define __builtin_truncl __builtin_truncf128
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+#define __builtin_roundl __builtin_roundf128
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/* Get the constant suffix from bits/floatn-compat.h. */
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#define L(x) __f128 (x)
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diff --git a/sysdeps/ieee754/flt-32/s_roundf.c b/sysdeps/ieee754/flt-32/s_roundf.c
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index 7c95125d9c..6fdfbbbade 100644
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--- a/sysdeps/ieee754/flt-32/s_roundf.c
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+++ b/sysdeps/ieee754/flt-32/s_roundf.c
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@@ -21,11 +21,16 @@
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#include <math_private.h>
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#include <libm-alias-float.h>
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+#include <math-use-builtins.h>
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float
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__roundf (float x)
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{
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+#if USE_ROUNDF_BUILTIN
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+ return __builtin_roundf (x);
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+#else
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+ /* Use generic implementation. */
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int32_t i0, j0;
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GET_FLOAT_WORD (i0, x);
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@@ -60,5 +65,6 @@ __roundf (float x)
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SET_FLOAT_WORD (x, i0);
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return x;
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+#endif /* ! USE_ROUNDF_BUILTIN */
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}
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libm_alias_float (__round, round)
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diff --git a/sysdeps/ieee754/ldbl-128/s_roundl.c b/sysdeps/ieee754/ldbl-128/s_roundl.c
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index 22789cedf3..564f8ac1b8 100644
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--- a/sysdeps/ieee754/ldbl-128/s_roundl.c
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+++ b/sysdeps/ieee754/ldbl-128/s_roundl.c
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@@ -22,11 +22,16 @@
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#include <math_private.h>
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#include <libm-alias-ldouble.h>
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+#include <math-use-builtins.h>
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_Float128
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__roundl (_Float128 x)
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{
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+#if USE_ROUNDL_BUILTIN
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+ return __builtin_roundl (x);
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+#else
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+ /* Use generic implementation. */
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int32_t j0;
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uint64_t i1, i0;
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@@ -77,5 +82,6 @@ __roundl (_Float128 x)
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SET_LDOUBLE_WORDS64 (x, i0, i1);
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return x;
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+#endif /* ! USE_ROUNDL_BUILTIN */
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}
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libm_alias_ldouble (__round, round)
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diff --git a/sysdeps/s390/fpu/math-use-builtins.h b/sysdeps/s390/fpu/math-use-builtins.h
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index a39715c612..51cb9f91ab 100644
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--- a/sysdeps/s390/fpu/math-use-builtins.h
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+++ b/sysdeps/s390/fpu/math-use-builtins.h
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@@ -46,18 +46,24 @@
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# define USE_TRUNCF_BUILTIN 1
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# define USE_TRUNCL_BUILTIN 1
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+# define USE_ROUND_BUILTIN 1
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+# define USE_ROUNDF_BUILTIN 1
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+# define USE_ROUNDL_BUILTIN 1
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+
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# if __GNUC_PREREQ (8, 0)
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# define USE_NEARBYINTF128_BUILTIN 1
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# define USE_RINTF128_BUILTIN 1
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# define USE_FLOORF128_BUILTIN 1
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# define USE_CEILF128_BUILTIN 1
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# define USE_TRUNCF128_BUILTIN 1
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+# define USE_ROUNDF128_BUILTIN 1
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# else
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# define USE_NEARBYINTF128_BUILTIN 0
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# define USE_RINTF128_BUILTIN 0
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# define USE_FLOORF128_BUILTIN 0
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# define USE_CEILF128_BUILTIN 0
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# define USE_TRUNCF128_BUILTIN 0
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+# define USE_ROUNDF128_BUILTIN 0
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# endif
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#else
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@@ -88,6 +94,11 @@
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# define USE_TRUNCL_BUILTIN 0
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# define USE_TRUNCF128_BUILTIN 0
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+# define USE_ROUND_BUILTIN 0
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+# define USE_ROUNDF_BUILTIN 0
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+# define USE_ROUNDL_BUILTIN 0
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+# define USE_ROUNDF128_BUILTIN 0
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+
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#endif /* ! HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT */
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#endif /* math-use-builtins.h */
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--
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2.18.2
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