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* [gcc r13-6752] or1k: Do not clear existing FPU exceptions before updating
@ 2023-03-19  6:46 Stafford Horne
  0 siblings, 0 replies; only message in thread
From: Stafford Horne @ 2023-03-19  6:46 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:33fb1625992ba8180b42988e714460bcab08ca0f

commit r13-6752-g33fb1625992ba8180b42988e714460bcab08ca0f
Author: Stafford Horne <shorne@gmail.com>
Date:   Sat Mar 18 16:43:05 2023 +0900

    or1k: Do not clear existing FPU exceptions before updating
    
    We should always carry the exceptions forward.  This bug was found when
    working on testing glibc math tests, many tests were failing with
    Overflow and Underflow flags not set.  This was traced to here.
    
    libgcc/ChangeLog:
    
            * config/or1k/sfp-machine.h (FP_HANDLE_EXCEPTIONS): Remove
            statement clearing existing exceptions.

Diff:
---
 libgcc/config/or1k/sfp-machine.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libgcc/config/or1k/sfp-machine.h b/libgcc/config/or1k/sfp-machine.h
index 162c6bc5326..c804270fb3c 100644
--- a/libgcc/config/or1k/sfp-machine.h
+++ b/libgcc/config/or1k/sfp-machine.h
@@ -73,7 +73,6 @@ do {								\
 do {								\
   if (__builtin_expect (_fex, 0))				\
     {								\
-      _fpcsr &= ~FP_EX_ALL;					\
       _fpcsr |= _fex;						\
       __asm__ volatile ("l.mtspr r0,%0,20" : : "r" (_fpcsr));	\
     }								\

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