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211 lines
6.3 KiB
211 lines
6.3 KiB
9 months ago
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From d37e99de7ab1cd8c3d427f74bf8ceb5774795fe5 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 15:09:20 +0100
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Subject: [PATCH 08/28] Use GCC builtins for rint functions if desired.
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This patch is using the corresponding GCC builtin for rintf, rint,
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rintl and rintf128 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 a2a9b004297b777758420c952cb6eea5985d37fe)
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---
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sysdeps/generic/math-use-builtins.h | 5 +++++
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sysdeps/ieee754/dbl-64/s_rint.c | 17 +++++++++++------
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sysdeps/ieee754/float128/float128_private.h | 3 +++
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sysdeps/ieee754/flt-32/s_rintf.c | 17 +++++++++++------
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sysdeps/ieee754/ldbl-128/s_rintl.c | 17 +++++++++++------
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sysdeps/s390/fpu/math-use-builtins.h | 11 +++++++++++
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6 files changed, 52 insertions(+), 18 deletions(-)
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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 e12490ed41..64b4a4bb5b 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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@@ -26,4 +26,9 @@
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#define USE_NEARBYINTL_BUILTIN 0
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#define USE_NEARBYINTF128_BUILTIN 0
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+#define USE_RINT_BUILTIN 0
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+#define USE_RINTF_BUILTIN 0
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+#define USE_RINTL_BUILTIN 0
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+#define USE_RINTF128_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_rint.c b/sysdeps/ieee754/dbl-64/s_rint.c
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index 7f3dc87b96..5f4ac7c1e3 100644
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--- a/sysdeps/ieee754/dbl-64/s_rint.c
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+++ b/sysdeps/ieee754/dbl-64/s_rint.c
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@@ -22,16 +22,20 @@
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-double.h>
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-
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-static const double
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-TWO52[2] = {
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- 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
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- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
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-};
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+#include <math-use-builtins.h>
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double
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__rint (double x)
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{
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+#if USE_RINT_BUILTIN
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+ return __builtin_rint (x);
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+#else
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+ /* Use generic implementation. */
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+ static const double
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+ TWO52[2] = {
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+ 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
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+ -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
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+ };
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int64_t i0, sx;
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int32_t j0;
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EXTRACT_WORDS64 (i0, x);
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@@ -58,6 +62,7 @@ __rint (double x)
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}
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double w = TWO52[sx] + x;
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return w - TWO52[sx];
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+#endif /* ! USE_RINT_BUILTIN */
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}
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#ifndef __rint
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libm_alias_double (__rint, rint)
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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 0bf6e8dee2..b872aefbfd 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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@@ -141,6 +141,8 @@
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#include <math-use-builtins.h>
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#undef USE_NEARBYINTL_BUILTIN
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#define USE_NEARBYINTL_BUILTIN USE_NEARBYINTF128_BUILTIN
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+#undef USE_RINTL_BUILTIN
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+#define USE_RINTL_BUILTIN USE_RINTF128_BUILTIN
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/* IEEE function renames. */
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#define __ieee754_acoshl __ieee754_acoshf128
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@@ -343,6 +345,7 @@
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#define __builtin_copysignl __builtin_copysignf128
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#define __builtin_signbitl __builtin_signbit
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#define __builtin_nearbyintl __builtin_nearbyintf128
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+#define __builtin_rintl __builtin_rintf128
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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_rintf.c b/sysdeps/ieee754/flt-32/s_rintf.c
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index db6f260a0b..a266b1999e 100644
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--- a/sysdeps/ieee754/flt-32/s_rintf.c
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+++ b/sysdeps/ieee754/flt-32/s_rintf.c
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@@ -16,16 +16,20 @@
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-float.h>
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-
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-static const float
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-TWO23[2]={
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- 8.3886080000e+06, /* 0x4b000000 */
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- -8.3886080000e+06, /* 0xcb000000 */
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-};
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+#include <math-use-builtins.h>
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float
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__rintf(float x)
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{
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+#if USE_RINTF_BUILTIN
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+ return __builtin_rintf (x);
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+#else
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+ /* Use generic implementation. */
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+ static const float
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+ TWO23[2] = {
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+ 8.3886080000e+06, /* 0x4b000000 */
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+ -8.3886080000e+06, /* 0xcb000000 */
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+ };
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int32_t i0,j0,sx;
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float w,t;
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GET_FLOAT_WORD(i0,x);
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@@ -45,6 +49,7 @@ __rintf(float x)
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}
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w = TWO23[sx]+x;
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return w-TWO23[sx];
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+#endif /* ! USE_RINTF_BUILTIN */
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}
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#ifndef __rintf
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libm_alias_float (__rint, rint)
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diff --git a/sysdeps/ieee754/ldbl-128/s_rintl.c b/sysdeps/ieee754/ldbl-128/s_rintl.c
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index 9e6637a225..f060503066 100644
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--- a/sysdeps/ieee754/ldbl-128/s_rintl.c
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+++ b/sysdeps/ieee754/ldbl-128/s_rintl.c
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@@ -30,15 +30,19 @@ static char rcsid[] = "$NetBSD: $";
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-ldouble.h>
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-
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-static const _Float128
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-TWO112[2]={
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- 5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */
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- -5.19229685853482762853049632922009600E+33L /* 0xC06F000000000000, 0 */
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-};
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+#include <math-use-builtins.h>
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_Float128 __rintl(_Float128 x)
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{
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+#if USE_RINTL_BUILTIN
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+ return __builtin_rintl (x);
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+#else
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+ /* Use generic implementation. */
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+ static const _Float128
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+ TWO112[2] = {
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+ 5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */
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+ -5.19229685853482762853049632922009600E+33L /* 0xC06F000000000000, 0 */
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+ };
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int64_t i0,j0,sx;
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uint64_t i1 __attribute__ ((unused));
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_Float128 w,t;
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@@ -59,5 +63,6 @@ _Float128 __rintl(_Float128 x)
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}
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w = TWO112[sx]+x;
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return w-TWO112[sx];
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+#endif /* ! USE_RINTL_BUILTIN */
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}
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libm_alias_ldouble (__rint, rint)
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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 7abbfb3b50..8b702a6a90 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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@@ -30,10 +30,16 @@
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# define USE_NEARBYINTF_BUILTIN 1
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# define USE_NEARBYINTL_BUILTIN 1
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+# define USE_RINT_BUILTIN 1
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+# define USE_RINTF_BUILTIN 1
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+# define USE_RINTL_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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# else
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# define USE_NEARBYINTF128_BUILTIN 0
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+# define USE_RINTF128_BUILTIN 0
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# endif
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#else
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@@ -44,6 +50,11 @@
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# define USE_NEARBYINTL_BUILTIN 0
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# define USE_NEARBYINTF128_BUILTIN 0
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+# define USE_RINT_BUILTIN 0
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+# define USE_RINTF_BUILTIN 0
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+# define USE_RINTL_BUILTIN 0
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+# define USE_RINTF128_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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