On 09/07/2012 11:31 AM, Suresh Siddha wrote:
+static inline void fx_finit(struct i387_fxsave_struct *fx)
+{
+ memset(fx, 0, xstate_size);
+ fx->cwd = 0x37f;
+ if (cpu_has_xmm)
+ fx->mxcsr = MXCSR_DEFAULT;
+}
+
Incidentally, Al Viro asked a very good question the other day, which is
why can't we just set mxcsr unconditionally here? I don't think any
CPUs with FXSAVE and no MXCSR (Pentium II from Intel,
Crusoe/TM-3xxx/5xxx from Transmeta, and presumably some of the K6
generation from AMD) ever looked at this field.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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