m68k: add private libgcc

Add private libgcc

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
master
angelo@sysam.it 9 years ago committed by Tom Rini
parent 8405b8d98a
commit 6463fd8f95
  1. 1
      arch/Kconfig
  2. 4
      arch/m68k/lib/Makefile
  3. 50
      arch/m68k/lib/ashldi3.c
  4. 50
      arch/m68k/lib/lshrdi3.c
  5. 71
      arch/m68k/lib/muldi3.c

@ -40,6 +40,7 @@ config BLACKFIN
config M68K
bool "M68000 architecture"
select HAVE_PRIVATE_LIBGCC
select HAVE_GENERIC_BOARD
select SYS_GENERIC_BOARD

@ -5,6 +5,10 @@
# SPDX-License-Identifier: GPL-2.0+
#
## Build a couple of necessary functions into a private libgcc
## if the user asked for it
lib-$(CONFIG_USE_PRIVATE_LIBGCC) += lshrdi3.o muldi3.o ashldi3.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-y += cache.o
obj-y += interrupts.o

@ -0,0 +1,50 @@
/*
* 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;
}

@ -0,0 +1,50 @@
/*
* lshrdi3.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 __lshrdi3 (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.high = 0;
w.s.low = (USItype)uu.s.high >> -bm;
}
else
{
USItype carries = (USItype)uu.s.high << bm;
w.s.high = (USItype)uu.s.high >> b;
w.s.low = ((USItype)uu.s.low >> b) | carries;
}
return w.ll;
}

@ -0,0 +1,71 @@
/*
* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
* gcc-2.7.2.3/longlong.h
*
* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#define SI_TYPE_SIZE 32
#define __BITS4 (SI_TYPE_SIZE / 4)
#define __ll_B (1L << (SI_TYPE_SIZE / 2))
#define __ll_lowpart(t) ((USItype) (t) % __ll_B)
#define __ll_highpart(t) ((USItype) (t) / __ll_B)
#define umul_ppmm(w1, w0, u, v) \
do { \
USItype __x0, __x1, __x2, __x3; \
USItype __ul, __vl, __uh, __vh; \
\
__ul = __ll_lowpart (u); \
__uh = __ll_highpart (u); \
__vl = __ll_lowpart (v); \
__vh = __ll_highpart (v); \
\
__x0 = (USItype) __ul * __vl; \
__x1 = (USItype) __ul * __vh; \
__x2 = (USItype) __uh * __vl; \
__x3 = (USItype) __uh * __vh; \
\
__x1 += __ll_highpart (__x0);/* this can't give carry */ \
__x1 += __x2; /* but this indeed can */ \
if (__x1 < __x2) /* did we get it? */ \
__x3 += __ll_B; /* yes, add it in the proper pos. */ \
\
(w1) = __x3 + __ll_highpart (__x1); \
(w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \
} while (0)
#define __umulsidi3(u, v) \
({DIunion __w; \
umul_ppmm (__w.s.high, __w.s.low, u, v); \
__w.ll; })
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 __muldi3 (DItype u, DItype v)
{
DIunion w;
DIunion uu, vv;
uu.ll = u,
vv.ll = v;
w.ll = __umulsidi3 (uu.s.low, vv.s.low);
w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high
+ (USItype) uu.s.high * (USItype) vv.s.low);
return w.ll;
}
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