Differential D14583 Diff 41272 head/sys/powerpc/powerpc/altivec.c

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head/sys/powerpc/powerpc/altivec.c

Show First 20 Lines • Show All 52 Lines • ▼ Show 20 Lines	save_vec_int(struct thread *td)

pcb = td->td_pcb;		pcb = td->td_pcb;

/*		/*
* Temporarily re-enable the vector unit during the save		* Temporarily re-enable the vector unit during the save
*/		*/
msr = mfmsr();		msr = mfmsr();
mtmsr(msr \| PSL_VEC);		mtmsr(msr \| PSL_VEC);
isync();

/*		/*
* Save the vector registers and VSCR to the PCB		* Save the vector registers and VSCR to the PCB
*/		*/
#define STVX(n) __asm ("stvx %1,0,%0" \		#define STVX(n) __asm ("stvx %1,0,%0" \
:: "b"(pcb->pcb_vec.vr[n]), "n"(n));		:: "b"(pcb->pcb_vec.vr[n]), "n"(n));
STVX(0); STVX(1); STVX(2); STVX(3);		STVX(0); STVX(1); STVX(2); STVX(3);
STVX(4); STVX(5); STVX(6); STVX(7);		STVX(4); STVX(5); STVX(6); STVX(7);
▲ Show 20 Lines • Show All 45 Lines • ▼ Show 20 Lines	enable_vec(struct thread *td)
}		}

/*		/*
* Temporarily enable the vector unit so the registers		* Temporarily enable the vector unit so the registers
* can be restored.		* can be restored.
*/		*/
msr = mfmsr();		msr = mfmsr();
mtmsr(msr \| PSL_VEC);		mtmsr(msr \| PSL_VEC);
isync();

/*		/*
* Restore VSCR by first loading it into a vector and then into VSCR.		* Restore VSCR by first loading it into a vector and then into VSCR.
* (this needs to done before loading the user's vector registers		* (this needs to done before loading the user's vector registers
* since we need to use a scratch vector register)		* since we need to use a scratch vector register)
*/		*/
__asm __volatile("vxor 0,0,0; lvewx 0,0,%0; mtvscr 0" \		__asm __volatile("vxor 0,0,0; lvewx 0,0,%0; mtvscr 0" \
:: "b"(&pcb->pcb_vec.vscr));		:: "b"(&pcb->pcb_vec.vscr));
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