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Mark inline stmxcsr instructions as volatile, since this appears to be

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the only way to convince gcc that they read the MXCSR.  The volatile
annotation may be needed elsewhere as well.
This commit is contained in:
David Schultz 2005-01-11 22:10:43 +00:00
parent 2c144a95ed
commit c1b70ced4f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=140085
1 changed files with 1 additions and 1 deletions
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lib/msun/amd64/fenv.h
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@ -84,7 +84,7 @@ extern const fenv_t __fe_dfl_env;
#define __fnstsw(__sw) __asm("fnstsw %0" : "=am" (*(__sw)))
#define __fwait() __asm __volatile("fwait")
#define __ldmxcsr(__csr) __asm __volatile("ldmxcsr %0" : : "m" (__csr))
#define __stmxcsr(__csr) __asm("stmxcsr %0" : "=m" (*(__csr)))
#define __stmxcsr(__csr) __asm __volatile("stmxcsr %0" : "=m" (*(__csr)))
static __inline int
feclearexcept(int __excepts)