diff options
| -rw-r--r-- | arch/Kconfig | 1 | ||||
| -rw-r--r-- | arch/m68k/lib/Makefile | 4 | ||||
| -rw-r--r-- | arch/m68k/lib/ashldi3.c | 50 | ||||
| -rw-r--r-- | arch/m68k/lib/lshrdi3.c | 50 | ||||
| -rw-r--r-- | arch/m68k/lib/muldi3.c | 71 |
5 files changed, 176 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 6489cc9..1709d40 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -40,6 +40,7 @@ config BLACKFIN config M68K bool "M68000 architecture" + select HAVE_PRIVATE_LIBGCC select HAVE_GENERIC_BOARD select SYS_GENERIC_BOARD diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile index 73d40bd..dbca42c 100644 --- a/arch/m68k/lib/Makefile +++ b/arch/m68k/lib/Makefile @@ -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 diff --git a/arch/m68k/lib/ashldi3.c b/arch/m68k/lib/ashldi3.c new file mode 100644 index 0000000..be197da --- /dev/null +++ b/arch/m68k/lib/ashldi3.c @@ -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; +}
\ No newline at end of file diff --git a/arch/m68k/lib/lshrdi3.c b/arch/m68k/lib/lshrdi3.c new file mode 100644 index 0000000..9052383 --- /dev/null +++ b/arch/m68k/lib/lshrdi3.c @@ -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; +}
\ No newline at end of file diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c new file mode 100644 index 0000000..d709c32 --- /dev/null +++ b/arch/m68k/lib/muldi3.c @@ -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; +} |