On Wed, 18 Jul 2012, Bruce Evans wrote:
On Tue, 17 Jul 2012, Konstantin Belousov wrote:
...
+ status =3D mxcsr & 0x3f;
+ control =3D (mxcsr >> 16) & 0x3f;
+ return (fpetable[status & (~control | 0x40)]);
The 0x40 bit doesn't exist in the mxcsr status and ORing it in here has
no effect. Replace the last 3 lines by:
return (fpetable[(status & (control >> 16)) & 0x3f];
Change status and control to mxcsr here, and remove the status and control
variables.
..
So I still want a single kernel exception handle that merges the statuses.
Merge the independent statuses modified by their independent controls:
return (fpetable[(fpsw & ((~fpcw & 0x3f) | 0x40)) |
((mxcsr & (mxcsr >> 16)) & 0x3f)]);
Use the same trap handler that reads all these statuses and controls.
Bruce
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