[Bug target/92846] [ARC] gloating point compares not generating Invalid Operand

[claziss at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92846

--- Comment #3 from claziss at gcc dot gnu.org ---
Author: claziss
Date: Thu Dec 12 08:42:21 2019
New Revision: 279274

URL: https://gcc.gnu.org/viewcvs?rev=279274&root=gcc&view=rev
Log:
[ARC] generate signaling FDCMPF for hard float comparisons

PR 92846:
ARC gcc generates FDCMP instructions which raises Invalid operation for
signaling NaN only. This causes glibc iseqsig() primitives to fail (in
the current ongoing glibc port to ARC)

So break up the hard float compares into tw categories and for unordered
compares generate the FDCMPF instructions which raised exception for
either NaNs.

With this fix testsuite/gcc.dg/torture/pr52451.c passes for ARC.

Also no regressions for the glibc math testsuite, only 6 additional
passes for test*iseqsig

gcc/
-xx-xx  Vineet Gupta  

* config/arc/arc-modes.def (CC_FPUE): New Mode CC_FPUE which
helps codegen generate exceptions even for quiet NaN.
* config/arc/arc.c (arc_init_reg_tables): Handle New CC_FPUE mode.
(get_arc_condition_code): Likewise.
(arc_select_cc_mode): LT, LE, GT, GE to use the New CC_FPUE mode.
* config/arc/arc.h (REVERSE_CONDITION): Handle New CC_FPUE mode.
* config/arc/predicates.md (proper_comparison_operator): Likewise.
* config/arc/fpu.md (cmpsf_fpu_trap): New Pattern for CC_FPUE.
(cmpdf_fpu_trap): Likewise.

Signed-off-by: Vineet Gupta 

Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arc/arc-modes.def
trunk/gcc/config/arc/arc.c
trunk/gcc/config/arc/arc.h
trunk/gcc/config/arc/fpu.md
trunk/gcc/config/arc/predicates.md

[Bug target/89877] [ARC] miscompilation due to missing cc clobber in longlong.h: add_ssaaaa()/sub_ddmmss()

[claziss at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89877

--- Comment #2 from claziss at gcc dot gnu.org ---
Author: claziss
Date: Wed Apr  3 09:53:03 2019
New Revision: 270118

URL: https://gcc.gnu.org/viewcvs?rev=270118&root=gcc&view=rev
Log:
[ARC]PR 88409: miscompilation due to missing cc clobber in longlong.h macros

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 

PR 89877

* longlong.h [__arc__] (add_ss): Add cc clobber
(sub_ddmmss): Likewise.

Signed-off-by: Claudiu Zissulescu 

Modified:
trunk/include/ChangeLog
trunk/include/longlong.h

[Bug target/85968] gcc/config/arc/arc.c:9805: bad test ?

[claziss at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85968

--- Comment #2 from claziss at gcc dot gnu.org ---
Author: claziss
Date: Wed Nov 14 11:31:12 2018
New Revision: 266107

URL: https://gcc.gnu.org/viewcvs?rev=266107&root=gcc&view=rev
Log:
[ARC] Backport form mainline
PR target/85968
* config/arc/arc.c (arc_return_address_register): Fix
if-condition.


Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arc/arc.c