/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_HEADER_START@
*
- * 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.
+ * 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.
*
- * 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
+ * This 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ * @APPLE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* Macro definitions for routines to manipulate the
* floating-point processor.
*/
-#include <kern/thread.h>
+
+#include <i386/proc_reg.h>
#include <i386/thread.h>
#include <kern/kern_types.h>
#include <mach/i386/kern_return.h>
#include <mach/i386/thread_status.h>
-#include <i386/proc_reg.h>
-
-extern int fp_kind;
-
-extern void init_fpu(void);
-extern void fpu_module_init(void);
-extern void fpu_free(
- struct x86_fpsave_state * fps);
-extern kern_return_t fpu_set_fxstate(
- thread_t thr_act,
- thread_state_t state);
-extern kern_return_t fpu_get_fxstate(
- thread_t thr_act,
- thread_state_t state);
-extern void fpu_dup_fxstate(
- thread_t parent,
- thread_t child);
-extern void fpnoextflt(void);
-extern void fpextovrflt(void);
-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 FXSAFE() (fp_kind == FP_FXSR)
-
-static inline void clear_fpu(void)
-{
- set_ts();
-}
+#define fpu_load_context(pcb)
/*
* Save thread`s FPU context.
+ * If only one CPU, we just set the task-switched bit,
+ * to keep the new thread from using the coprocessor.
+ * If multiple CPUs, we save the entire state.
+ * NOTE: in order to provide backwards compatible support in the kernel. When saving SSE2 state, we also save the
+ * FP state in it's old location. Otherwise fpu_get_state() and fpu_set_state() will stop working
*/
+#define fpu_save_context(thread) \
+ { \
+ register struct i386_fpsave_state *ifps; \
+ ifps = (thread)->machine.pcb->ims.ifps; \
+ if (ifps != 0 && !ifps->fp_valid) { \
+ /* registers are in FPU - save to memory */ \
+ ifps->fp_valid = TRUE; \
+ ifps->fp_save_flavor = FP_387; \
+ if (FXSAFE()) { \
+ fxsave(&ifps->fx_save_state); \
+ ifps->fp_save_flavor = FP_FXSR; \
+ } \
+ fnsave(&ifps->fp_save_state); \
+ } \
+ set_ts(); \
+ }
+
+
+
+extern int fp_kind;
-static inline void fpu_save_context(thread_t thread)
-{
- struct x86_fpsave_state *ifps;
-
- 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 init_fpu(void);
+extern void fpu_module_init(void);
+extern void fpu_free(
+ struct i386_fpsave_state * fps);
+extern kern_return_t fpu_set_state(
+ thread_t thr_act,
+ struct i386_float_state * st);
+extern kern_return_t fpu_get_state(
+ thread_t thr_act,
+ struct i386_float_state * st);
+extern kern_return_t fpu_set_fxstate(
+ thread_t thr_act,
+ struct i386_float_state * st);
+extern kern_return_t fpu_get_fxstate(
+ thread_t thr_act,
+ struct i386_float_state * st);
+extern void fpnoextflt(void);
+extern void fpextovrflt(void);
+extern void fpexterrflt(void);
+extern void fp_state_alloc(void);
+extern void fpintr(void);
+extern void fpflush(thread_t);
#endif /* _I386_FPU_H_ */
projects / apple / xnu.git / blobdiff