It's necessary for clang sparc64 support
---
grub-core/kern/compiler-rt.c | 58 ++++++++++++++++++++++++++++++++++++
include/grub/compiler-rt.h | 7 +++++
2 files changed, 65 insertions(+)
diff --git a/grub-core/kern/compiler-rt.c b/grub-core/kern/compiler-rt.c
index eda689a0c..2902ed03d 100644
--- a/grub-core/kern/compiler-rt.c
+++ b/grub-core/kern/compiler-rt.c
@@ -452,3 +452,61 @@ __clzdi2 (grub_uint64_t val)
}
}
#endif
+
+#if defined(__sparc__) && defined(__clang__)
+/* Copied from multi3.c which is under MIT license. */
+typedef long long di_int;
+typedef unsigned long long du_int;
+
+typedef union
+{
+ grub_clang_ti_int all;
+ struct
+ {
+#ifndef GRUB_CPU_WORDS_BIGENDIAN
+ du_int low;
+ di_int high;
+#else
+ di_int high;
+ du_int low;
+#endif /* _YUGA_LITTLE_ENDIAN */
+ }s;
+} twords;
+
+static
+grub_clang_ti_int
+__mulddi3(du_int a, du_int b)
+{
+ twords r;
+ const int bits_in_dword_2 = (int)(sizeof(di_int) * 8) / 2;
+ const du_int lower_mask = (du_int)~0 >> bits_in_dword_2;
+ r.s.low = (a & lower_mask) * (b & lower_mask);
+ du_int t = r.s.low >> bits_in_dword_2;
+ r.s.low &= lower_mask;
+ t += (a >> bits_in_dword_2) * (b & lower_mask);
+ r.s.low += (t & lower_mask) << bits_in_dword_2;
+ r.s.high = t >> bits_in_dword_2;
+ t = r.s.low >> bits_in_dword_2;
+ r.s.low &= lower_mask;
+ t += (b >> bits_in_dword_2) * (a & lower_mask);
+ r.s.low += (t & lower_mask) << bits_in_dword_2;
+ r.s.high += t >> bits_in_dword_2;
+ r.s.high += (a >> bits_in_dword_2) * (b >> bits_in_dword_2);
+ return r.all;
+}
+
+/* Returns: a * b */
+
+grub_clang_ti_int
+__multi3(grub_clang_ti_int a, grub_clang_ti_int b)
+{
+ twords x;
+ x.all = a;
+ twords y;
+ y.all = b;
+ twords r;
+ r.all = __mulddi3(x.s.low, y.s.low);
+ r.s.high += x.s.high * y.s.low + x.s.low * y.s.high;
+ return r.all;
+}
+#endif
diff --git a/include/grub/compiler-rt.h b/include/grub/compiler-rt.h
index 17828b322..3637db47e 100644
--- a/include/grub/compiler-rt.h
+++ b/include/grub/compiler-rt.h
@@ -209,5 +209,12 @@ void EXPORT_FUNC (___chkstk_ms) (void);
void EXPORT_FUNC (__chkstk_ms) (void);
#endif
+#if defined(__sparc__) && defined(__clang__)
+/* Copied from multi3.c which is under MIT license. */
+typedef int grub_clang_ti_int __attribute__ ((mode (TI)));
+
+grub_clang_ti_int EXPORT_FUNC(__multi3) (grub_clang_ti_int a,
grub_clang_ti_int b);
+#endif
+
#endif
--
2.39.2
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/grub-devel
