simple test such as below was failing.
| void main(int argc, char *argv[])
| {
| size_t total_time = 115424; // expected 115.424
| double secs = (double)total_time/(double)1000;
| printf("%s %d %lf\n", "secs", total_time, secs); // prints 113.504
| printf("%d\n", (size_t)secs);
| }
The printf eventually called into glibc stdlib/divrem.c:__mpn_divrem()
which uses the __arc__ specific inline asm macros from longlong.h which
were causing miscompilation.
include/
2019-03-28 Vineet Gupta <vgupta@xxxxxxxxxxxx>
PR 89877
* longlong.h [__arc__] (add_ssaaaa): Add cc clobber
(sub_ddmmss): Likewise.
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
---
include/ChangeLog | 7 +++++++
include/longlong.h | 6 ++++--
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/ChangeLog b/include/ChangeLog
index be08141deeb9..96d967d10a52 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,10 @@
+2019-03-28 Vineet Gupta <vgupta@xxxxxxxxxxxx>
+
+ PR 89877
+
+ * longlong.h [__arc__] (add_ssaaaa): Add cc clobber
+ (sub_ddmmss): Likewise.
+
2019-02-11 Philippe Waroquiers <philippe.waroquiers@xxxxxxxxx>
* splay-tree.h (splay_tree_delete_key_fn): Update comment.
diff --git a/include/longlong.h b/include/longlong.h
index 3dd8dc3aa80c..1f0ce4204255 100644
--- a/include/longlong.h
+++ b/include/longlong.h
@@ -199,7 +199,8 @@ extern UDItype __udiv_qrnnd (UDItype *, UDItype, UDItype, UDItype);
: "%r" ((USItype) (ah)), \
"rICal" ((USItype) (bh)), \
"%r" ((USItype) (al)), \
- "rICal" ((USItype) (bl)))
+ "rICal" ((USItype) (bl)) \
+ : "cc")
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
__asm__ ("sub.f %1, %4, %5\n\tsbc %0, %2, %3" \
: "=r" ((USItype) (sh)), \
@@ -207,7 +208,8 @@ extern UDItype __udiv_qrnnd (UDItype *, UDItype, UDItype, UDItype);
: "r" ((USItype) (ah)), \
"rICal" ((USItype) (bh)), \
"r" ((USItype) (al)), \
- "rICal" ((USItype) (bl)))
+ "rICal" ((USItype) (bl)) \
+ : "cc")
#define __umulsidi3(u,v) ((UDItype)(USItype)u*(USItype)v)
#ifdef __ARC_NORM__
--
2.7.4
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