From: Angelo Dureghello <ang...@kernel-space.org>
Add ashrdi3.c to private libgcc.
Signed-off-by: Angelo Dureghello <ang...@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;
+}
+
--
2.39.1
