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 #if !defined(__lint) && defined(__GNUC__)
  34
  35 /*
  36  * This file is intended to contain gcc-style inline assembly that corresponds
  37  * to base.il for all architectures.  At the moment these inlines exist only
  38  * for sparc and sparcv9 and these functions are implemented in C for x86.
  39  * They should be inlined here for gcc if a new x86 base.il is created.
  40  */
  41
  42 #if defined(__sparc)
  43 extern __GNU_INLINE double
  44 __mul_set(double x, double y, int *pe)
  45 {
  46         double __result;
  47         uint32_t __fsr;
  48         uint32_t *__addr = &__fsr;
  49
  50         __asm__ __volatile__(
  51             "fmuld %4, %5, %0\n\t"
  52             "st %%fsr, %3\n\t"
  53             "ld %3, %2\n\t"
  54             "and %2, 1, %2\n\t"
  55             "st %2, %1"
  56             : "=&e" (__result), "=m" (*pe), "=r" (__fsr), "=m" (*__addr)
  57             : "e" (x), "e" (y));
  58         return (__result);
  59 }
  60 #endif  /* __sparc */
  61
  62 #if defined(__sparc)
  63 extern __GNU_INLINE double
  64 __div_set(double x, double y, int *pe)
  65 {
  66         double __result;
  67         uint32_t __fsr;
  68         uint32_t *__addr = &__fsr;
  69
  70         __asm__ __volatile__(
  71             "fdivd %4, %5, %0\n\t"
  72             "st %%fsr, %3\n\t"
  73             "ld %3, %2\n\t"
  74             "and %2, 1, %2\n\t"
  75             "st %2, %1"
  76             : "=&e" (__result), "=m" (*pe), "=r" (__fsr), "=m" (*__addr)
  77             : "e" (x), "e" (y));
  78         return (__result);
  79 }
  80 #endif  /* __sparc */
  81
  82 #if defined(__sparc)
  83 extern __GNU_INLINE double
  84 __dabs(double *x)
  85 {
  86         double __result;
  87
  88         __asm__ __volatile__(
  89 #if defined(__sparcv9)
  90             "fabsd %1, %0"
  91 #else
  92             "fabss %1, %0"
  93 #endif
  94             : "=e" (__result)
  95             : "0" (*x));
  96         return (__result);
  97 }
  98 #endif  /* __sparc */
  99
 100 #if defined(__sparc)
 101 extern  __GNU_INLINE void
 102 __get_ieee_flags(__ieee_flags_type *b)
 103 {
 104         uint32_t __fsr;
 105
 106         /*
 107          * It's preferable to let the assembler insert the nops as
 108          * needed; however, it warns as it does so.  Add them here for now.
 109          */
 110         __asm__ __volatile__(
 111             "st %%fsr, %0\n\t"
 112             "st %%g0, %1\n\t"
 113             "ld %1, %%fsr\n\t"
 114             "nop; nop; nop"
 115             : "=m" (*b), "=m" (__fsr));
 116 }
 117 #endif  /* __sparc */
 118
 119 #if defined(__sparc)
 120 extern __GNU_INLINE void
 121 __set_ieee_flags(__ieee_flags_type *b)
 122 {
 123         /*
 124          * It's preferable to let the assembler insert the nops as
 125          * needed; however, it warns as it does so.  Add them here for now.
 126          */
 127         __asm__ __volatile__(
 128             "ld %0, %%fsr\n\t"
 129             "nop; nop; nop"
 130             : /* no outputs */
 131             : "m" (*b));
 132 }
 133 #endif  /* __sparc */
 134
 135 #endif  /* !__lint && __GNUC__ */
 136
 137 #endif  /* _BASE_INLINES_H */