diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/get-rounding-mode.h | 33 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu_control.h | 29 |
3 files changed, 68 insertions, 3 deletions
@@ -1,3 +1,12 @@ +2019-06-06 Paul A. Clarke <pc@us.ibm.com> + + * sysdeps/powerpc/fpu_control.h (_FPU_MASK_RC): New. + (__FPU_MFFS): New. + (__FPU_MFFSL): New. + (_FPU_GET_RC): New. + (_FPU_GETCW): Use __FPU_MFFS(). + * sysdeps/powerpc/fpu/get-rounding-mode.h: New file. + 2019-06-06 Florian Weimer <fweimer@redhat.com> * sysdeps/unix/sysv/linux/riscv/flush-icache.c: Do not use diff --git a/sysdeps/powerpc/fpu/get-rounding-mode.h b/sysdeps/powerpc/fpu/get-rounding-mode.h new file mode 100644 index 0000000..e2fdbbb --- /dev/null +++ b/sysdeps/powerpc/fpu/get-rounding-mode.h @@ -0,0 +1,33 @@ +/* Determine floating-point rounding mode within libc. powerpc64 version. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _POWERPC64_GET_ROUNDING_MODE_H +#define _POWERPC64_GET_ROUNDING_MODE_H 1 + +#include <fenv.h> +#include <fpu_control.h> + +/* Return the floating-point rounding mode. */ + +static inline int +get_rounding_mode (void) +{ + return _FPU_GET_RC (); +} + +#endif /* get-rounding-mode.h */ diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h index e88d816..07ccc84 100644 --- a/sysdeps/powerpc/fpu_control.h +++ b/sysdeps/powerpc/fpu_control.h @@ -40,6 +40,8 @@ extern fpu_control_t __fpu_control; # define _FPU_RC_UP 0x02 # define _FPU_RC_ZERO 0x01 +# define _FPU_MASK_RC (_FPU_RC_NEAREST|_FPU_RC_DOWN|_FPU_RC_UP|_FPU_RC_ZERO) + # define _FPU_MASK_NI 0x04 /* non-ieee mode */ /* masking of interrupts */ @@ -63,15 +65,36 @@ extern fpu_control_t __fpu_control; typedef unsigned int fpu_control_t; /* Macros for accessing the hardware control word. */ +# define __FPU_MFFS() \ + ({register double __fr; \ + __asm__ ("mffs %0" : "=f" (__fr)); \ + __fr; \ + }) + # define _FPU_GETCW(cw) \ ({union { double __d; unsigned long long __ll; } __u; \ - register double __fr; \ - __asm__ ("mffs %0" : "=f" (__fr)); \ - __u.__d = __fr; \ + __u.__d = __FPU_MFFS(); \ (cw) = (fpu_control_t) __u.__ll; \ (fpu_control_t) __u.__ll; \ }) +#ifdef _ARCH_PWR9 +# define __FPU_MFFSL() \ + ({register double __fr; \ + __asm__ ("mffsl %0" : "=f" (__fr)); \ + __fr; \ + }) +#else +# define __FPU_MFFSL() __FPU_MFFS() +#endif + +# define _FPU_GET_RC() \ + ({union { double __d; unsigned long long __ll; } __u; \ + __u.__d = __FPU_MFFSL(); \ + __u.__ll &= _FPU_MASK_RC; \ + (fpu_control_t) __u.__ll; \ + }) + # define _FPU_SETCW(cw) \ { union { double __d; unsigned long long __ll; } __u; \ register double __fr; \ |