osfmk/i386/fpu.c

117 #define	fnsave(state)  \
118 	__asm__ volatile("fnsave %0" : "=m" (*state))
120 #define	frstor(state) \
121 	__asm__ volatile("frstor %0" : : "m" (state))
176  * Configure the initial FPU state presented to new threads.
284  * Allocate and initialize FP state for current thread.
285  * Don't load state.
339 		/* Restore the compatibility/legacy mode XMM+x87 state */
369 			/* save the compatibility/legacy mode XMM+x87 state */
416 			  "x86 fpsave state");
423 	/* Determine MXCSR reserved bits and configure initial FPU state*/
468  * Set the floating-point state for a thread based
484 	x86_float_state64_t	*state;
495 	state = (x86_float_state64_t *)tstate;
500 	if (state == NULL) {
502 	     * new FPU state is 'invalid'.
503 	     * Deallocate the fp state if it exists.
516 	     * Valid state.  Allocate the fp state if there is none.
548 	    state->fpu_mxcsr &= mxcsr_capability_mask;
550 	    bcopy((char *)&state->fpu_fcw, (char *)ifps, state_size);
562 			x86_avx_state64_t *ystate = (x86_avx_state64_t *) state;
594  * Get the floating-point state for a thread.
606 	x86_float_state64_t	*state;
618 	state = (x86_float_state64_t *)tstate;
628 		 * No valid floating-point state.
631 		bcopy((char *)&initial_fp_state, (char *)&state->fpu_fcw,
639 	 * Make sure we`ve got the latest fp state info
640 	 * If the live fpu state belongs to our target
654         	bcopy((char *)ifps, (char *)&state->fpu_fcw, state_size);
665 				x86_avx_state64_t *ystate = (x86_avx_state64_t *) state;
682  * so no way for fpu state to get manipulated by an
710 		 * Make sure we`ve got the latest fp state info
727 			/* Mark the new fp saved state as non-live. */
820 		 * Load this thread`s state into coprocessor live context.
832  * Re-initialize FPU.  Floating point state is not valid.
852 	 * Invalidate the thread`s FPU state.
902 	 * Save the FPU state and turn off the FPU.
921  * Save FPU state.
947  * Restore FPU state from PCB.
990 	 * Save the FPU state and turn off the FPU.