diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/s_float_bitwise.h')
| -rw-r--r-- | sysdeps/powerpc/fpu/s_float_bitwise.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sysdeps/powerpc/fpu/s_float_bitwise.h b/sysdeps/powerpc/fpu/s_float_bitwise.h new file mode 100644 index 0000000000..06b4f2a76e --- /dev/null +++ b/sysdeps/powerpc/fpu/s_float_bitwise.h @@ -0,0 +1,112 @@ +/* Bitwise manipulation over float. Function prototypes. + Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011 + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _FLOAT_BITWISE_ +#define _FLOAT_BITWISE_ 1 + +#include "math_private.h" + +/* Returns (int)(num & 0x7FFFFFF0 == value) */ +static inline +int __float_and_test28 (float num, float value) +{ + float ret; +#ifdef _ARCH_PWR7 + vector int mask = (vector int) { + 0x7ffffffe, 0x00000000, 0x00000000, 0x0000000 + }; + __asm__ ( + /* the 'f' constrain is use on mask because we just need + * to compare floats, not full vector */ + "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) + ); +#else + int32_t inum; + GET_FLOAT_WORD(inum, num); + inum = (inum & 0x7ffffff0); + SET_FLOAT_WORD(ret, inum); +#endif + return (ret == value); +} + +/* Returns (int)(num & 0x7FFFFF00 == value) */ +static inline +int __float_and_test24 (float num, float value) +{ + float ret; +#ifdef _ARCH_PWR7 + vector int mask = (vector int) { + 0x7fffffe0, 0x00000000, 0x00000000, 0x0000000 + }; + __asm__ ( + "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) + ); +#else + int32_t inum; + GET_FLOAT_WORD(inum, num); + inum = (inum & 0x7fffff00); + SET_FLOAT_WORD(ret, inum); +#endif + return (ret == value); +} + +/* Returns (float)(num & 0x7F800000) */ +static inline +float __float_and8 (float num) +{ + float ret; +#ifdef _ARCH_PWR7 + vector int mask = (vector int) { + 0x7ff00000, 0x00000000, 0x00000000, 0x00000000 + }; + __asm__ ( + "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) + ); +#else + int32_t inum; + GET_FLOAT_WORD(inum, num); + inum = (inum & 0x7f800000); + SET_FLOAT_WORD(ret, inum); +#endif + return ret; +} + +/* Returns ((int32_t)(num & 0x7F800000) >> 23) */ +static inline +int32_t __float_get_exp (float num) +{ + int32_t inum; +#ifdef _ARCH_PWR7 + float ret; + vector int mask = (vector int) { + 0x7ff00000, 0x00000000, 0x00000000, 0x00000000 + }; + __asm__ ( + "xxland %x0,%x1,%x2" : "=f" (ret) : "f" (num), "f" (mask) + ); + GET_FLOAT_WORD(inum, ret); +#else + GET_FLOAT_WORD(inum, num); + inum = inum & 0x7f800000; +#endif + return inum >> 23; +} + +#endif /* s_float_bitwise.h */ |