projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 85b8555e | 1 | /* Shift functions for the GCC support library for the Renesas RL78 processors. |
| 85ec4feb | 2 | Copyright (C) 2011-2018 Free Software Foundation, Inc. |
| 85b8555e DD |
3 | Contributed by Red Hat. |
| 4 | ||
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | GCC is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation; either version 3, or (at your option) | |
| 10 | any later version. | |
| 11 | ||
| 12 | GCC is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | Under Section 7 of GPL version 3, you are granted additional | |
| 18 | permissions described in the GCC Runtime Library Exception, version | |
| 19 | 3.1, as published by the Free Software Foundation. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License and | |
| 22 | a copy of the GCC Runtime Library Exception along with this program; | |
| 23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 | <http://www.gnu.org/licenses/>. */ | |
| 25 | \f | |
| 26 | typedef int sint32_type __attribute__ ((mode (SI))); | |
| 27 | typedef unsigned int uint32_type __attribute__ ((mode (SI))); | |
| 28 | typedef int sint16_type __attribute__ ((mode (HI))); | |
| 29 | typedef unsigned int uint16_type __attribute__ ((mode (HI))); | |
| 30 | ||
| 31 | uint32_type __ashlsi3 (uint32_type in, char bit); | |
| 32 | sint32_type __ashrsi3 (sint32_type in, char bit); | |
| 33 | int __clrsbhi2 (sint16_type x); | |
| 34 | extern int __clrsbsi2 (sint32_type x); | |
| 35 | ||
| 36 | typedef struct | |
| 37 | { | |
| 38 | union | |
| 39 | { | |
| 40 | uint32_type u; | |
| 41 | uint16_type h[2]; | |
| 42 | } u; | |
| 43 | } dd; | |
| 44 | ||
| 45 | uint32_type | |
| 46 | __ashlsi3 (uint32_type in, char bit) | |
| 47 | { | |
| 48 | uint16_type h, l; | |
| 49 | dd d; | |
| 50 | ||
| 51 | if (bit > 32) | |
| 52 | return 0; | |
| 53 | if (bit < 0) | |
| 54 | return in; | |
| 55 | ||
| 56 | d.u.u = in; | |
| 57 | h = d.u.h[1]; | |
| 58 | l = d.u.h[0]; | |
| 59 | ||
| 60 | if (bit > 15) | |
| 61 | { | |
| 62 | h = l; | |
| 63 | l = 0; | |
| 64 | bit -= 16; | |
| 65 | } | |
| 66 | ||
| 67 | while (bit) | |
| 68 | { | |
| 69 | h = (h << 1) | (l >> 15); | |
| 70 | l <<= 1; | |
| 71 | bit --; | |
| 72 | } | |
| 73 | ||
| 74 | d.u.h[1] = h; | |
| 75 | d.u.h[0] = l; | |
| 76 | return d.u.u; | |
| 77 | } | |
| 78 | ||
| 79 | sint32_type | |
| 80 | __ashrsi3 (sint32_type in, char bit) | |
| 81 | { | |
| 82 | sint16_type h; | |
| 83 | uint16_type l; | |
| 84 | dd d; | |
| 85 | ||
| 86 | if (bit > 32) | |
| 87 | return 0; | |
| 88 | if (bit < 0) | |
| 89 | return in; | |
| 90 | ||
| 91 | d.u.u = in; | |
| 92 | h = d.u.h[1]; | |
| 93 | l = d.u.h[0]; | |
| 94 | ||
| 95 | while (bit) | |
| 96 | { | |
| 97 | l = (h << 15) | (l >> 1); | |
| 98 | h >>= 1; | |
| 99 | bit --; | |
| 100 | } | |
| 101 | ||
| 102 | d.u.h[1] = h; | |
| 103 | d.u.h[0] = l; | |
| 104 | return d.u.u; | |
| 105 | } | |
| 106 | ||
| 107 | int | |
| 108 | __clrsbhi2 (sint16_type x) | |
| 109 | { | |
| 110 | if (x == 0) | |
| 111 | return 15; | |
| 112 | return __clrsbsi2 ((sint32_type) x) - 16; | |
| 113 | } |