1/* Shift functions for the GCC support library for the Renesas RL78 processors. 2 Copyright (C) 2011-2022 Free Software Foundation, Inc. 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 26typedef int sint32_type __attribute__ ((mode (SI))); 27typedef unsigned int uint32_type __attribute__ ((mode (SI))); 28typedef int sint16_type __attribute__ ((mode (HI))); 29typedef unsigned int uint16_type __attribute__ ((mode (HI))); 30 31uint32_type __ashlsi3 (uint32_type in, char bit); 32sint32_type __ashrsi3 (sint32_type in, char bit); 33int __clrsbhi2 (sint16_type x); 34extern int __clrsbsi2 (sint32_type x); 35 36typedef struct 37{ 38 union 39 { 40 uint32_type u; 41 uint16_type h[2]; 42 } u; 43} dd; 44 45uint32_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 79sint32_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 107int 108__clrsbhi2 (sint16_type x) 109{ 110 if (x == 0) 111 return 15; 112 return __clrsbsi2 ((sint32_type) x) - 16; 113} 114