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- /* libgcc routines for MSP430
- Copyright (C) 2005-2022 Free Software Foundation, Inc.
- Contributed by Red Hat.
- This file is part of GCC.
- GCC is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
- GCC is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- License for more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- typedef unsigned int uint32_type __attribute__ ((mode (SI)));
- typedef unsigned int uint16_type __attribute__ ((mode (HI)));
- typedef unsigned int uint08_type __attribute__ ((mode (QI)));
- #define C3B(a,b,c) a##b##c
- #define C3(a,b,c) C3B(a,b,c)
- #if defined (MUL_NONE) || defined (MUL_16)
- /* __muldi3 must be excluded from libgcc.a to prevent multiple-definition
- errors for the hwmult configurations that have their own definition.
- However, for MUL_NONE and MUL_16, the software version is still required, so
- the necessary preprocessed output from libgcc2.c to compile that
- software version of __muldi3 is below. */
- typedef unsigned int USItype __attribute__ ((mode (SI)));
- typedef int DItype __attribute__ ((mode (DI)));
- typedef int SItype __attribute__ ((mode (SI)));
- struct DWstruct {SItype low, high;};
- typedef union
- {
- struct DWstruct s;
- DItype ll;
- } DWunion;
- DItype __muldi3 (DItype u, DItype v);
- DItype
- __muldi3 (DItype u, DItype v)
- {
- const DWunion uu = {.ll = u};
- const DWunion vv = {.ll = v};
- /* The next block of code is expanded from the following line:
- DWunion w = {.ll = __umulsidi3 (uu.s.low, vv.s.low)}; */
- DWunion w;
- USItype __x0, __x1, __x2, __x3;
- USItype __ul, __vl, __uh, __vh;
- __ul = ((USItype) (uu.s.low) & (((USItype) 1 << ((4 * 8) / 2)) - 1));
- __uh = ((USItype) (uu.s.low) >> ((4 * 8) / 2));
- __vl = ((USItype) (vv.s.low) & (((USItype) 1 << ((4 * 8) / 2)) - 1));
- __vh = ((USItype) (vv.s.low) >> ((4 * 8) / 2));
- __x0 = (USItype) __ul * __vl;
- __x1 = (USItype) __ul * __vh;
- __x2 = (USItype) __uh * __vl;
- __x3 = (USItype) __uh * __vh;
- __x1 += ((USItype) (__x0) >> ((4 * 8) / 2));
- __x1 += __x2;
- if (__x1 < __x2)
- __x3 += ((USItype) 1 << ((4 * 8) / 2));
- (w.s.high) = __x3 + ((USItype) (__x1) >> ((4 * 8) / 2));
- (w.s.low) = ((USItype) (__x1) & (((USItype) 1 << ((4 * 8) / 2)) - 1))
- * ((USItype) 1 << ((4 * 8) / 2))
- + ((USItype) (__x0) & (((USItype) 1 << ((4 * 8) / 2)) - 1));
- w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
- + (USItype) uu.s.high * (USItype) vv.s.low);
- return w.ll;
- }
- #endif
- #if defined MUL_NONE
- /* The software multiply library needs __mspabi_mpyll. */
- #undef UINT_TYPE
- #undef BITS_MINUS_1
- #undef NAME_MODE
- #define UINT_TYPE uint32_type
- #define BITS_MINUS_1 31
- #define NAME_MODE si
- #include "msp430-mul.h"
- #elif defined MUL_16
- /* The 16-bit multiply library needs a software version of SI->DI widening
- multiplication. */
- signed long long
- __mspabi_mpysll (signed long a, signed long b)
- {
- return (signed long long) a * (signed long long) b;
- }
- unsigned long long
- __mspabi_mpyull (unsigned long a, unsigned long b)
- {
- return (unsigned long long) a * (unsigned long long) b;
- }
- #else
- #undef UINT_TYPE
- #undef BITS_MINUS_1
- #undef NAME_MODE
- #define UINT_TYPE uint08_type
- #define BITS_MINUS_1 7
- #define NAME_MODE qi
- #include "msp430-mul.h"
- #endif /* MUL_NONE */
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