1 /* libgcc routines for MSP430 2 Copyright (C) 2005-2022 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 it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 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 26 typedef unsigned int uint32_type __attribute__ ((mode (SI))); 27 typedef unsigned int uint16_type __attribute__ ((mode (HI))); 28 typedef unsigned int uint08_type __attribute__ ((mode (QI))); 29 30 #define C3B(a,b,c) a##b##c 31 #define C3(a,b,c) C3B(a,b,c) 32 33 #if defined (MUL_NONE) || defined (MUL_16) 34 /* __muldi3 must be excluded from libgcc.a to prevent multiple-definition 35 errors for the hwmult configurations that have their own definition. 36 However, for MUL_NONE and MUL_16, the software version is still required, so 37 the necessary preprocessed output from libgcc2.c to compile that 38 software version of __muldi3 is below. */ 39 typedef unsigned int USItype __attribute__ ((mode (SI))); 40 typedef int DItype __attribute__ ((mode (DI))); 41 typedef int SItype __attribute__ ((mode (SI))); 42 struct DWstruct {SItype low, high;}; 43 44 typedef union 45 { 46 struct DWstruct s; 47 DItype ll; 48 } DWunion; 49 50 DItype __muldi3 (DItype u, DItype v); 51 52 DItype 53 __muldi3 (DItype u, DItype v) 54 { 55 const DWunion uu = {.ll = u}; 56 const DWunion vv = {.ll = v}; 57 /* The next block of code is expanded from the following line: 58 DWunion w = {.ll = __umulsidi3 (uu.s.low, vv.s.low)}; */ 59 DWunion w; 60 USItype __x0, __x1, __x2, __x3; 61 USItype __ul, __vl, __uh, __vh; 62 __ul = ((USItype) (uu.s.low) & (((USItype) 1 << ((4 * 8) / 2)) - 1)); 63 __uh = ((USItype) (uu.s.low) >> ((4 * 8) / 2)); 64 __vl = ((USItype) (vv.s.low) & (((USItype) 1 << ((4 * 8) / 2)) - 1)); 65 __vh = ((USItype) (vv.s.low) >> ((4 * 8) / 2)); 66 __x0 = (USItype) __ul * __vl; 67 __x1 = (USItype) __ul * __vh; 68 __x2 = (USItype) __uh * __vl; 69 __x3 = (USItype) __uh * __vh; 70 __x1 += ((USItype) (__x0) >> ((4 * 8) / 2)); 71 __x1 += __x2; 72 if (__x1 < __x2) 73 __x3 += ((USItype) 1 << ((4 * 8) / 2)); 74 (w.s.high) = __x3 + ((USItype) (__x1) >> ((4 * 8) / 2)); 75 (w.s.low) = ((USItype) (__x1) & (((USItype) 1 << ((4 * 8) / 2)) - 1)) 76 * ((USItype) 1 << ((4 * 8) / 2)) 77 + ((USItype) (__x0) & (((USItype) 1 << ((4 * 8) / 2)) - 1)); 78 79 w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high 80 + (USItype) uu.s.high * (USItype) vv.s.low); 81 return w.ll; 82 } 83 #endif 84 85 #if defined MUL_NONE 86 87 /* The software multiply library needs __mspabi_mpyll. */ 88 89 #undef UINT_TYPE 90 #undef BITS_MINUS_1 91 #undef NAME_MODE 92 93 #define UINT_TYPE uint32_type 94 #define BITS_MINUS_1 31 95 #define NAME_MODE si 96 97 #include "msp430-mul.h" 98 99 #elif defined MUL_16 100 101 /* The 16-bit multiply library needs a software version of SI->DI widening 102 multiplication. */ 103 104 signed long long 105 __mspabi_mpysll (signed long a, signed long b) 106 { 107 return (signed long long) a * (signed long long) b; 108 } 109 110 unsigned long long 111 __mspabi_mpyull (unsigned long a, unsigned long b) 112 { 113 return (unsigned long long) a * (unsigned long long) b; 114 } 115 116 #else 117 118 #undef UINT_TYPE 119 #undef BITS_MINUS_1 120 #undef NAME_MODE 121 122 #define UINT_TYPE uint08_type 123 #define BITS_MINUS_1 7 124 #define NAME_MODE qi 125 126 #include "msp430-mul.h" 127 128 #endif /* MUL_NONE */ 129