m68k: add private libgcc
Add private libgcc
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
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;
+}