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[Xen-devel] [PATCH][RFC] FPU LWP 1/5: clean up the FPU code
| To: | "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] [PATCH][RFC] FPU LWP 1/5: clean up the FPU code |
| From: | Wei Huang <wei.huang2@xxxxxxx> |
| Date: | Thu, 14 Apr 2011 15:37:54 -0500 |
| Delivery-date: | Thu, 14 Apr 2011 13:44:20 -0700 |
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This patch reorganizes and cleans up the FPU code. Main changes include: 1. Related functions are re-arranged together.2. FPU save/restore code are extracted out as independent functions (fsave/frstor, fxsave/fxrstor, xsave/xrstor). 3. Two FPU entry functions, fpu_save() and fpu_restore(), are defined. They utilize xsave/xrstor to save/restore FPU state if CPU supports extended state. Otherwise they fall back to fxsave/fxrstor or fsave/frstor. Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>
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