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authorStefan Liebler <stli@linux.ibm.com>2019-12-11 15:09:20 +0100
committerStefan Liebler <stli@linux.ibm.com>2019-12-11 15:12:16 +0100
commit6c1b6a5e8cd91e0e1965509ad91e627e60eb00a3 (patch)
tree5fb98d8518228eb9b7d517826b360fb3196cf765 /sysdeps/ieee754
parenta2a9b004297b777758420c952cb6eea5985d37fe (diff)
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Use GCC builtins for floor functions if desired.
This patch is using the corresponding GCC builtin for floorf, floor, floorl and floorf128 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. The code of the generic implementation is not changed. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/ieee754')
-rw-r--r--sysdeps/ieee754/dbl-64/s_floor.c6
-rw-r--r--sysdeps/ieee754/float128/float128_private.h3
-rw-r--r--sysdeps/ieee754/flt-32/s_floorf.c6
-rw-r--r--sysdeps/ieee754/ldbl-128/s_floorl.c6
4 files changed, 21 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_floor.c b/sysdeps/ieee754/dbl-64/s_floor.c
index ce0c42bdb6..78325214f4 100644
--- a/sysdeps/ieee754/dbl-64/s_floor.c
+++ b/sysdeps/ieee754/dbl-64/s_floor.c
@@ -35,6 +35,7 @@
#include <math_private.h>
#include <stdint.h>
#include <libm-alias-double.h>
+#include <math-use-builtins.h>
/*
* floor(x)
@@ -47,6 +48,10 @@
double
__floor (double x)
{
+#if USE_FLOOR_BUILTIN
+ return __builtin_floor (x);
+#else
+ /* Use generic implementation. */
int64_t i0;
EXTRACT_WORDS64 (i0, x);
int32_t j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
@@ -74,6 +79,7 @@ __floor (double x)
else if (j0 == 0x400)
return x + x; /* inf or NaN */
return x;
+#endif /* ! USE_FLOOR_BUILTIN */
}
#ifndef __floor
libm_alias_double (__floor, floor)
diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h
index f458e7b85f..8c8a74a12c 100644
--- a/sysdeps/ieee754/float128/float128_private.h
+++ b/sysdeps/ieee754/float128/float128_private.h
@@ -144,6 +144,8 @@
#define USE_NEARBYINTL_BUILTIN USE_NEARBYINTF128_BUILTIN
#undef USE_RINTL_BUILTIN
#define USE_RINTL_BUILTIN USE_RINTF128_BUILTIN
+#undef USE_FLOORL_BUILTIN
+#define USE_FLOORL_BUILTIN USE_FLOORF128_BUILTIN
/* IEEE function renames. */
#define __ieee754_acoshl __ieee754_acoshf128
@@ -349,6 +351,7 @@
#define __builtin_signbitl __builtin_signbit
#define __builtin_nearbyintl __builtin_nearbyintf128
#define __builtin_rintl __builtin_rintf128
+#define __builtin_floorl __builtin_floorf128
/* Get the constant suffix from bits/floatn-compat.h. */
#define L(x) __f128 (x)
diff --git a/sysdeps/ieee754/flt-32/s_floorf.c b/sysdeps/ieee754/flt-32/s_floorf.c
index b34d967f01..afe02a1693 100644
--- a/sysdeps/ieee754/flt-32/s_floorf.c
+++ b/sysdeps/ieee754/flt-32/s_floorf.c
@@ -24,10 +24,15 @@
#include <math.h>
#include <math_private.h>
#include <libm-alias-float.h>
+#include <math-use-builtins.h>
float
__floorf(float x)
{
+#if USE_FLOORF_BUILTIN
+ return __builtin_floorf (x);
+#else
+ /* Use generic implementation. */
int32_t i0,j0;
uint32_t i;
GET_FLOAT_WORD(i0,x);
@@ -50,6 +55,7 @@ __floorf(float x)
}
SET_FLOAT_WORD(x,i0);
return x;
+#endif /* ! USE_FLOORF_BUILTIN */
}
#ifndef __floorf
libm_alias_float (__floor, floor)
diff --git a/sysdeps/ieee754/ldbl-128/s_floorl.c b/sysdeps/ieee754/ldbl-128/s_floorl.c
index f340a3fbca..cfe008392a 100644
--- a/sysdeps/ieee754/ldbl-128/s_floorl.c
+++ b/sysdeps/ieee754/ldbl-128/s_floorl.c
@@ -28,9 +28,14 @@ static char rcsid[] = "$NetBSD: $";
#include <math.h>
#include <math_private.h>
#include <libm-alias-ldouble.h>
+#include <math-use-builtins.h>
_Float128 __floorl(_Float128 x)
{
+#if USE_FLOORL_BUILTIN
+ return __builtin_floorl (x);
+#else
+ /* Use generic implementation. */
int64_t i0,i1,j0;
uint64_t i,j;
GET_LDOUBLE_WORDS64(i0,i1,x);
@@ -65,5 +70,6 @@ _Float128 __floorl(_Float128 x)
}
SET_LDOUBLE_WORDS64(x,i0,i1);
return x;
+#endif /* ! USE_FLOORL_BUILTIN */
}
libm_alias_ldouble (__floor, floor)