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Temporarily disable Jeff's fix for atomic_cmpset_32() to zero-extend the

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value we load from memory.  gcc3.1 passes in the u_int32_t old value to
compare against as a _sign_-extended 64-bit value for some reason (bug?).
This is a temporary workaround so kernels work again on alpha.
This commit is contained in:
John Baldwin 2002-05-11 04:27:39 +00:00
parent f7bb25f702
commit 8f0dda1601
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=96393
1 changed files with 2 additions and 0 deletions
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sys/alpha/include/atomic.h
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@ -356,7 +356,9 @@ atomic_cmpset_32(volatile u_int32_t* p, u_int32_t cmpval, u_int32_t newval)
__asm __volatile (
"1:\tldl_l %0, %4\n\t" /* load old value */
#ifdef notyet
"zapnot %0,0xf,%0\n\t" /* Chop of signed bits */
#endif
"cmpeq %0, %2, %0\n\t" /* compare */
"beq %0, 2f\n\t" /* exit if not equal */
"mov %3, %0\n\t" /* value to store */