From: Angelo Dureghello angelo@kernel-space.org
Add ashrdi3.c to private libgcc.
Signed-off-by: Angelo Dureghello angelo@kernel-space.org --- arch/m68k/lib/Makefile | 2 +- arch/m68k/lib/ashrdi3.c | 48 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) create mode 100644 arch/m68k/lib/ashrdi3.c
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile index b66d66afd2..6e1fd938f5 100644 --- a/arch/m68k/lib/Makefile +++ b/arch/m68k/lib/Makefile @@ -5,7 +5,7 @@
## Build a couple of necessary functions into a private libgcc ## if the user asked for it -lib-$(CONFIG_USE_PRIVATE_LIBGCC) += lshrdi3.o muldi3.o ashldi3.o +lib-$(CONFIG_USE_PRIVATE_LIBGCC) += lshrdi3.o muldi3.o ashldi3.o ashrdi3.o
obj-y += bdinfo.o obj-$(CONFIG_CMD_BOOTM) += bootm.o diff --git a/arch/m68k/lib/ashrdi3.c b/arch/m68k/lib/ashrdi3.c new file mode 100644 index 0000000000..e144378b7f --- /dev/null +++ b/arch/m68k/lib/ashrdi3.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: + * Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. + */ + +#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; +} di_union; + +DItype __ashrdi3(DItype u, word_type b) +{ + di_union w; + word_type bm; + di_union uu; + + if (b == 0) + return u; + + uu.ll = u; + + bm = (sizeof(SItype) * BITS_PER_UNIT) - b; + if (bm <= 0) { + /* w.s.high = 1..1 or 0..0 */ + w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1); + w.s.low = uu.s.high >> -bm; + } else { + USItype carries = (USItype)uu.s.high << bm; + + w.s.high = uu.s.high >> b; + w.s.low = ((USItype)uu.s.low >> b) | carries; + } + + return w.ll; +} +