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 <vgu...@synopsys.com> PR 89877 * longlong.h [__arc__] (add_ssaaaa): Add cc clobber (sub_ddmmss): Likewise. Signed-off-by: Vineet Gupta <vgu...@synopsys.com> --- 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 <vgu...@synopsys.com> + + PR 89877 + + * longlong.h [__arc__] (add_ssaaaa): Add cc clobber + (sub_ddmmss): Likewise. + 2019-02-11 Philippe Waroquiers <philippe.waroqui...@skynet.be> * 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 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc