X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/c0fea4742e91338fffdcf79f86a7c1d5e2b97eb1..6d2010ae8f7a6078e10b361c6962983bab233e0f:/osfmk/i386/fpu.h diff --git a/osfmk/i386/fpu.h b/osfmk/i386/fpu.h index 9effc417f..5b0658f60 100644 --- a/osfmk/i386/fpu.h +++ b/osfmk/i386/fpu.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2010 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -48,9 +54,6 @@ * the rights to redistribute these changes. */ -/* - */ - #ifndef _I386_FPU_H_ #define _I386_FPU_H_ @@ -59,24 +62,34 @@ * floating-point processor. */ #include -#include #include #include #include #include +#include + +typedef enum { + FXSAVE32 = 1, + FXSAVE64 = 2, + XSAVE32 = 3, + XSAVE64 = 4, + FP_UNUSED = 5 + } fp_save_layout_t; extern int fp_kind; extern void init_fpu(void); extern void fpu_module_init(void); extern void fpu_free( - struct x86_fpsave_state * fps); + void * fps); extern kern_return_t fpu_set_fxstate( thread_t thr_act, - thread_state_t state); + thread_state_t state, + thread_flavor_t f); extern kern_return_t fpu_get_fxstate( thread_t thr_act, - thread_state_t state); + thread_state_t state, + thread_flavor_t f); extern void fpu_dup_fxstate( thread_t parent, thread_t child); @@ -86,86 +99,12 @@ extern void fpexterrflt(void); extern void fpSSEexterrflt(void); extern void fpflush(thread_t); extern void fp_setvalid(boolean_t); -extern void fxsave64(struct x86_fx_save *); -extern void fxrstor64(struct x86_fx_save *); - -/* - * FPU instructions. - */ -#define fninit() \ - __asm__ volatile("fninit") - -#define fnstcw(control) \ - __asm__("fnstcw %0" : "=m" (*(unsigned short *)(control))) - -#define fldcw(control) \ - __asm__ volatile("fldcw %0" : : "m" (*(unsigned short *) &(control)) ) - -extern unsigned short fnstsw(void); - -extern __inline__ unsigned short fnstsw(void) -{ - unsigned short status; - __asm__ volatile("fnstsw %0" : "=ma" (status)); - return(status); -} - -#define fnclex() \ - __asm__ volatile("fnclex") - -#define fnsave(state) \ - __asm__ volatile("fnsave %0" : "=m" (*state)) - -#define frstor(state) \ - __asm__ volatile("frstor %0" : : "m" (state)) - -#define fwait() \ - __asm__("fwait"); - -#define fxrstor(addr) __asm("fxrstor %0" : : "m" (*(addr))) -#define fxsave(addr) __asm __volatile("fxsave %0" : "=m" (*(addr))) - -#define FXSAFE() (fp_kind == FP_FXSR) - - -static inline void clear_fpu(void) -{ - set_ts(); -} - -/* - * Save thread`s FPU context. - */ - -static inline void fpu_save_context(thread_t thread) -{ - struct x86_fpsave_state *ifps; +#ifdef __i386__ +extern void fxsave64(struct x86_fx_thread_state *); +extern void fxrstor64(struct x86_fx_thread_state *); +#endif - assert(ml_get_interrupts_enabled() == FALSE); - ifps = (thread)->machine.pcb->ifps; - if (ifps != 0 && !ifps->fp_valid) { - /* Clear CR0.TS in preparation for the FP context save. In - * theory, this shouldn't be necessary since a live FPU should - * indicate that TS is clear. However, various routines - * (such as sendsig & sigreturn) manipulate TS directly. - */ - clear_ts(); - /* registers are in FPU - save to memory */ - ifps->fp_valid = TRUE; - if (!thread_is_64bit(thread) || is_saved_state32(thread->machine.pcb->iss)) { - /* save the compatibility/legacy mode XMM+x87 state */ - fxsave(&ifps->fx_save_state); - ifps->fp_save_layout = FXSAVE32; - } - else { - /* Execute a brief jump to 64-bit mode to save the 64 - * bit state - */ - fxsave64(&ifps->fx_save_state); - ifps->fp_save_layout = FXSAVE64; - } - } - set_ts(); -} +extern void clear_fpu(void); +extern void fpu_save_context(thread_t thread); #endif /* _I386_FPU_H_ */