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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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