mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 12:33:41 +00:00
50 lines
No EOL
936 B
C
50 lines
No EOL
936 B
C
/*
|
|
* ashldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
|
|
* gcc-2.7.2.3/longlong.h
|
|
*
|
|
* Copyright (C) 1989-2015 Free Software Foundation, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#define BITS_PER_UNIT 8
|
|
|
|
typedef int SItype __attribute__ ((mode (SI)));
|
|
typedef unsigned int USItype __attribute__ ((mode (SI)));
|
|
typedef int DItype __attribute__ ((mode (DI)));
|
|
typedef int word_type __attribute__ ((mode (__word__)));
|
|
|
|
struct DIstruct {SItype high, low;};
|
|
|
|
typedef union
|
|
{
|
|
struct DIstruct s;
|
|
DItype ll;
|
|
} DIunion;
|
|
|
|
DItype __ashldi3 (DItype u, word_type b)
|
|
{
|
|
DIunion w;
|
|
word_type bm;
|
|
DIunion uu;
|
|
|
|
if (b == 0)
|
|
return u;
|
|
|
|
uu.ll = u;
|
|
|
|
bm = (sizeof (SItype) * BITS_PER_UNIT) - b;
|
|
if (bm <= 0)
|
|
{
|
|
w.s.low = 0;
|
|
w.s.high = (USItype)uu.s.low << -bm;
|
|
}
|
|
else
|
|
{
|
|
USItype carries = (USItype)uu.s.low >> bm;
|
|
w.s.low = (USItype)uu.s.low << b;
|
|
w.s.high = ((USItype)uu.s.high << b) | carries;
|
|
}
|
|
|
|
return w.ll;
|
|
} |