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riscv-gcc-1
Commit 122a5d60 by Andrew Waterman Committed by Richard Henderson
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Avoid misaligned atomic operations 

 Andrew Waterman <waterman@cs.berkeley.edu>

 * fop_n.c (libat_fetch_op): Align address to word boundary.
 (libat_op_fetch): Likewise.

From-SVN: r219954
parent f81f49c1
Showing with 11 additions and 6 deletions
libatomic/ChangeLog
2015-01-21 Andrew Waterman <waterman@cs.berkeley.edu>
* fop_n.c (libat_fetch_op): Align address to word boundary.
(libat_op_fetch): Likewise.
2015-01-16 Ilya Verbin <ilya.verbin@intel.com>
PR testsuite/64605
......
libatomic/fop_n.c
......@@ -112,9 +112,9 @@ SIZE(C2(libat_fetch_,NAME)) (UTYPE *mptr, UTYPE opval, int smodel)
pre_barrier (smodel);
wptr = (UWORD *)mptr;
shift = 0;
mask = -1;
wptr = (UWORD *)((uintptr_t)mptr & -WORDSIZE);
shift = (((uintptr_t)mptr % WORDSIZE) * CHAR_BIT) ^ SIZE(INVERT_MASK);
mask = SIZE(MASK) << shift;
wopval = (UWORD)opval << shift;
woldval = __atomic_load_n (wptr, __ATOMIC_RELAXED);
......@@ -136,9 +136,9 @@ SIZE(C3(libat_,NAME,_fetch)) (UTYPE *mptr, UTYPE opval, int smodel)
pre_barrier (smodel);
wptr = (UWORD *)mptr;
shift = 0;
mask = -1;
wptr = (UWORD *)((uintptr_t)mptr & -WORDSIZE);
shift = (((uintptr_t)mptr % WORDSIZE) * CHAR_BIT) ^ SIZE(INVERT_MASK);
mask = SIZE(MASK) << shift;
wopval = (UWORD)opval << shift;
woldval = __atomic_load_n (wptr, __ATOMIC_RELAXED);
......
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