usr/src/lib/libc/inc/base_inlines.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _BASE_INLINES_H
  28 #define _BASE_INLINES_H
  29
  30 #include <sys/ccompile.h>
  31 #include <sys/types.h>
  32
  33 /*
  34  * This file is intended to contain gcc-style inline assembly for all
  35  * architectures.  At the moment these inlines exist only for sparc and
  36  * sparcv9 and these functions are implemented in C for x86.
  37  */
  38
  39 #if defined(__sparc)
  40 extern __GNU_INLINE double
  41 __mul_set(double x, double y, int *pe)
  42 {
  43         double __result;
  44         uint32_t __fsr;
  45         uint32_t *__addr = &__fsr;
  46
  47         __asm__ __volatile__(
  48             "fmuld %4, %5, %0\n\t"
  49             "st %%fsr, %3\n\t"
  50             "ld %3, %2\n\t"
  51             "and %2, 1, %2\n\t"
  52             "st %2, %1"
  53             : "=&e" (__result), "=m" (*pe), "=r" (__fsr), "=m" (*__addr)
  54             : "e" (x), "e" (y));
  55         return (__result);
  56 }
  57 #endif  /* __sparc */
  58
  59 #if defined(__sparc)
  60 extern __GNU_INLINE double
  61 __div_set(double x, double y, int *pe)
  62 {
  63         double __result;
  64         uint32_t __fsr;
  65         uint32_t *__addr = &__fsr;
  66
  67         __asm__ __volatile__(
  68             "fdivd %4, %5, %0\n\t"
  69             "st %%fsr, %3\n\t"
  70             "ld %3, %2\n\t"
  71             "and %2, 1, %2\n\t"
  72             "st %2, %1"
  73             : "=&e" (__result), "=m" (*pe), "=r" (__fsr), "=m" (*__addr)
  74             : "e" (x), "e" (y));
  75         return (__result);
  76 }
  77 #endif  /* __sparc */
  78
  79 #if defined(__sparc)
  80 extern __GNU_INLINE double
  81 __dabs(double *x)
  82 {
  83         double __result;
  84
  85         __asm__ __volatile__(
  86 #if defined(__sparcv9)
  87             "fabsd %1, %0"
  88 #else
  89             "fabss %1, %0"
  90 #endif
  91             : "=e" (__result)
  92             : "0" (*x));
  93         return (__result);
  94 }
  95 #endif  /* __sparc */
  96
  97 #if defined(__sparc)
  98 extern  __GNU_INLINE void
  99 __get_ieee_flags(__ieee_flags_type *b)
 100 {
 101         uint32_t __fsr;
 102
 103         /*
 104          * It's preferable to let the assembler insert the nops as
 105          * needed; however, it warns as it does so.  Add them here for now.
 106          */
 107         __asm__ __volatile__(
 108             "st %%fsr, %0\n\t"
 109             "st %%g0, %1\n\t"
 110             "ld %1, %%fsr\n\t"
 111             "nop; nop; nop"
 112             : "=m" (*b), "=m" (__fsr));
 113 }
 114 #endif  /* __sparc */
 115
 116 #if defined(__sparc)
 117 extern __GNU_INLINE void
 118 __set_ieee_flags(__ieee_flags_type *b)
 119 {
 120         /*
 121          * It's preferable to let the assembler insert the nops as
 122          * needed; however, it warns as it does so.  Add them here for now.
 123          */
 124         __asm__ __volatile__(
 125             "ld %0, %%fsr\n\t"
 126             "nop; nop; nop"
 127             : /* no outputs */
 128             : "m" (*b));
 129 }
 130 #endif  /* __sparc */
 131
 132 #endif  /* _BASE_INLINES_H */