[v2,09/18] Use GCC builtins for floor functions if desired.
Commit Message
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.
---
sysdeps/generic/math-use-builtins.h | 5 +++++
sysdeps/ieee754/dbl-64/s_floor.c | 6 ++++++
sysdeps/ieee754/float128/float128_private.h | 3 +++
sysdeps/ieee754/flt-32/s_floorf.c | 6 ++++++
sysdeps/ieee754/ldbl-128/s_floorl.c | 6 ++++++
sysdeps/s390/fpu/math-use-builtins.h | 11 +++++++++++
6 files changed, 37 insertions(+)
Comments
On 09/12/2019 09:45, Stefan Liebler wrote:
> 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.
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> sysdeps/generic/math-use-builtins.h | 5 +++++
> sysdeps/ieee754/dbl-64/s_floor.c | 6 ++++++
> sysdeps/ieee754/float128/float128_private.h | 3 +++
> sysdeps/ieee754/flt-32/s_floorf.c | 6 ++++++
> sysdeps/ieee754/ldbl-128/s_floorl.c | 6 ++++++
> sysdeps/s390/fpu/math-use-builtins.h | 11 +++++++++++
> 6 files changed, 37 insertions(+)
>
> diff --git a/sysdeps/generic/math-use-builtins.h b/sysdeps/generic/math-use-builtins.h
> index 64b4a4bb5b..e1c5df62e4 100644
> --- a/sysdeps/generic/math-use-builtins.h
> +++ b/sysdeps/generic/math-use-builtins.h
> @@ -31,4 +31,9 @@
> #define USE_RINTL_BUILTIN 0
> #define USE_RINTF128_BUILTIN 0
>
> +#define USE_FLOOR_BUILTIN 0
> +#define USE_FLOORF_BUILTIN 0
> +#define USE_FLOORL_BUILTIN 0
> +#define USE_FLOORF128_BUILTIN 0
> +
> #endif /* math-use-builtins.h */
Ok.
> 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)
Ok.
> 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)
Ok.
> 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)
Ok.
> 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)
Ok.
> diff --git a/sysdeps/s390/fpu/math-use-builtins.h b/sysdeps/s390/fpu/math-use-builtins.h
> index 8b702a6a90..c213c16c6f 100644
> --- a/sysdeps/s390/fpu/math-use-builtins.h
> +++ b/sysdeps/s390/fpu/math-use-builtins.h
> @@ -34,12 +34,18 @@
> # define USE_RINTF_BUILTIN 1
> # define USE_RINTL_BUILTIN 1
>
> +# define USE_FLOOR_BUILTIN 1
> +# define USE_FLOORF_BUILTIN 1
> +# define USE_FLOORL_BUILTIN 1
> +
> # if __GNUC_PREREQ (8, 0)
> # define USE_NEARBYINTF128_BUILTIN 1
> # define USE_RINTF128_BUILTIN 1
> +# define USE_FLOORF128_BUILTIN 1
> # else
> # define USE_NEARBYINTF128_BUILTIN 0
> # define USE_RINTF128_BUILTIN 0
> +# define USE_FLOORF128_BUILTIN 0
> # endif
>
> #else
> @@ -55,6 +61,11 @@
> # define USE_RINTL_BUILTIN 0
> # define USE_RINTF128_BUILTIN 0
>
> +# define USE_FLOOR_BUILTIN 0
> +# define USE_FLOORF_BUILTIN 0
> +# define USE_FLOORL_BUILTIN 0
> +# define USE_FLOORF128_BUILTIN 0
> +
> #endif /* ! HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT */
>
> #endif /* math-use-builtins.h */
>
Ok.
@@ -31,4 +31,9 @@
#define USE_RINTL_BUILTIN 0
#define USE_RINTF128_BUILTIN 0
+#define USE_FLOOR_BUILTIN 0
+#define USE_FLOORF_BUILTIN 0
+#define USE_FLOORL_BUILTIN 0
+#define USE_FLOORF128_BUILTIN 0
+
#endif /* math-use-builtins.h */
@@ -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)
@@ -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)
@@ -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)
@@ -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)
@@ -34,12 +34,18 @@
# define USE_RINTF_BUILTIN 1
# define USE_RINTL_BUILTIN 1
+# define USE_FLOOR_BUILTIN 1
+# define USE_FLOORF_BUILTIN 1
+# define USE_FLOORL_BUILTIN 1
+
# if __GNUC_PREREQ (8, 0)
# define USE_NEARBYINTF128_BUILTIN 1
# define USE_RINTF128_BUILTIN 1
+# define USE_FLOORF128_BUILTIN 1
# else
# define USE_NEARBYINTF128_BUILTIN 0
# define USE_RINTF128_BUILTIN 0
+# define USE_FLOORF128_BUILTIN 0
# endif
#else
@@ -55,6 +61,11 @@
# define USE_RINTL_BUILTIN 0
# define USE_RINTF128_BUILTIN 0
+# define USE_FLOOR_BUILTIN 0
+# define USE_FLOORF_BUILTIN 0
+# define USE_FLOORL_BUILTIN 0
+# define USE_FLOORF128_BUILTIN 0
+
#endif /* ! HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT */
#endif /* math-use-builtins.h */