xref: /onnv-gate/usr/src/uts/intel/sys/fp.h (revision 0)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate /*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
28*0Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
29*0Sstevel@tonic-gate /*		All Rights Reserved				*/
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate #ifndef _SYS_FP_H
32*0Sstevel@tonic-gate #define	_SYS_FP_H
33*0Sstevel@tonic-gate 
34*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
35*0Sstevel@tonic-gate 
36*0Sstevel@tonic-gate #ifdef __cplusplus
37*0Sstevel@tonic-gate extern "C" {
38*0Sstevel@tonic-gate #endif
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate /*
41*0Sstevel@tonic-gate  * 80287/80387 and SSE/SSE2 floating point processor definitions
42*0Sstevel@tonic-gate  */
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate /*
45*0Sstevel@tonic-gate  * values that go into fp_kind
46*0Sstevel@tonic-gate  */
47*0Sstevel@tonic-gate #define	FP_NO	0	/* no fp chip, no emulator (no fp support)	*/
48*0Sstevel@tonic-gate #define	FP_SW	1	/* no fp chip, using software emulator		*/
49*0Sstevel@tonic-gate #define	FP_HW	2	/* chip present bit				*/
50*0Sstevel@tonic-gate #define	FP_287	2	/* 80287 chip present				*/
51*0Sstevel@tonic-gate #define	FP_387	3	/* 80387 chip present				*/
52*0Sstevel@tonic-gate #define	FP_487	6	/* 80487 chip present				*/
53*0Sstevel@tonic-gate #define	FP_486	6	/* 80486 chip present				*/
54*0Sstevel@tonic-gate #define	__FP_SSE 0x103	/* x87 plus SSE-capable CPU			*/
55*0Sstevel@tonic-gate 
56*0Sstevel@tonic-gate /*
57*0Sstevel@tonic-gate  * masks for 80387 control word
58*0Sstevel@tonic-gate  */
59*0Sstevel@tonic-gate #define	FPIM	0x00000001	/* invalid operation			*/
60*0Sstevel@tonic-gate #define	FPDM	0x00000002	/* denormalized operand			*/
61*0Sstevel@tonic-gate #define	FPZM	0x00000004	/* zero divide				*/
62*0Sstevel@tonic-gate #define	FPOM	0x00000008	/* overflow				*/
63*0Sstevel@tonic-gate #define	FPUM	0x00000010	/* underflow				*/
64*0Sstevel@tonic-gate #define	FPPM	0x00000020	/* precision				*/
65*0Sstevel@tonic-gate #define	FPPC	0x00000300	/* precision control			*/
66*0Sstevel@tonic-gate #define	FPRC	0x00000C00	/* rounding control			*/
67*0Sstevel@tonic-gate #define	FPIC	0x00001000	/* infinity control			*/
68*0Sstevel@tonic-gate #define	WFPDE	0x00000080	/* data chain exception			*/
69*0Sstevel@tonic-gate 
70*0Sstevel@tonic-gate /*
71*0Sstevel@tonic-gate  * (Old symbol compatibility)
72*0Sstevel@tonic-gate  */
73*0Sstevel@tonic-gate #define	FPINV	FPIM
74*0Sstevel@tonic-gate #define	FPDNO	FPDM
75*0Sstevel@tonic-gate #define	FPZDIV	FPZM
76*0Sstevel@tonic-gate #define	FPOVR	FPOM
77*0Sstevel@tonic-gate #define	FPUNR	FPUM
78*0Sstevel@tonic-gate #define	FPPRE	FPPM
79*0Sstevel@tonic-gate 
80*0Sstevel@tonic-gate /*
81*0Sstevel@tonic-gate  * precision, rounding, and infinity options in control word
82*0Sstevel@tonic-gate  */
83*0Sstevel@tonic-gate #define	FPSIG24 0x00000000	/* 24-bit significand precision (short) */
84*0Sstevel@tonic-gate #define	FPSIG53 0x00000200	/* 53-bit significand precision (long)	*/
85*0Sstevel@tonic-gate #define	FPSIG64 0x00000300	/* 64-bit significand precision (temp)	*/
86*0Sstevel@tonic-gate #define	FPRTN	0x00000000	/* round to nearest or even		*/
87*0Sstevel@tonic-gate #define	FPRD	0x00000400	/* round down				*/
88*0Sstevel@tonic-gate #define	FPRU	0x00000800	/* round up				*/
89*0Sstevel@tonic-gate #define	FPCHOP	0x00000C00	/* chop (truncate toward zero)		*/
90*0Sstevel@tonic-gate #define	FPP	0x00000000	/* projective infinity			*/
91*0Sstevel@tonic-gate #define	FPA	0x00001000	/* affine infinity			*/
92*0Sstevel@tonic-gate #define	WFPB17	0x00020000	/* bit 17				*/
93*0Sstevel@tonic-gate #define	WFPB24	0x00040000	/* bit 24				*/
94*0Sstevel@tonic-gate 
95*0Sstevel@tonic-gate /*
96*0Sstevel@tonic-gate  * masks for 80387 status word
97*0Sstevel@tonic-gate  */
98*0Sstevel@tonic-gate #define	FPS_IE	0x00000001	/* invalid operation			*/
99*0Sstevel@tonic-gate #define	FPS_DE	0x00000002	/* denormalized operand			*/
100*0Sstevel@tonic-gate #define	FPS_ZE	0x00000004	/* zero devide				*/
101*0Sstevel@tonic-gate #define	FPS_OE	0x00000008	/* overflow				*/
102*0Sstevel@tonic-gate #define	FPS_UE	0x00000010	/* underflow				*/
103*0Sstevel@tonic-gate #define	FPS_PE	0x00000020	/* precision				*/
104*0Sstevel@tonic-gate #define	FPS_SF	0x00000040	/* stack fault				*/
105*0Sstevel@tonic-gate #define	FPS_ES	0x00000080	/* error summary bit			*/
106*0Sstevel@tonic-gate #define	FPS_C0	0x00000100	/* C0 bit				*/
107*0Sstevel@tonic-gate #define	FPS_C1	0x00000200	/* C1 bit				*/
108*0Sstevel@tonic-gate #define	FPS_C2	0x00000400	/* C2 bit				*/
109*0Sstevel@tonic-gate #define	FPS_TOP	0x00003800	/* top of stack pointer			*/
110*0Sstevel@tonic-gate #define	FPS_C3	0x00004000	/* C3 bit				*/
111*0Sstevel@tonic-gate #define	FPS_B	0x00008000	/* busy bit				*/
112*0Sstevel@tonic-gate 
113*0Sstevel@tonic-gate /*
114*0Sstevel@tonic-gate  * Exception flags manually cleared during x87 exception handling.
115*0Sstevel@tonic-gate  */
116*0Sstevel@tonic-gate #define	FPS_SW_EFLAGS	\
117*0Sstevel@tonic-gate 	(FPS_IE|FPS_DE|FPS_ZE|FPS_OE|FPS_UE|FPS_PE|FPS_SF|FPS_ES|FPS_B)
118*0Sstevel@tonic-gate 
119*0Sstevel@tonic-gate /*
120*0Sstevel@tonic-gate  * Initial value of FPU control word as per 4th ed. ABI document
121*0Sstevel@tonic-gate  * - affine infinity
122*0Sstevel@tonic-gate  * - round to nearest or even
123*0Sstevel@tonic-gate  * - 64-bit double precision
124*0Sstevel@tonic-gate  * - all exceptions masked
125*0Sstevel@tonic-gate  */
126*0Sstevel@tonic-gate #define	FPU_CW_INIT	0x133f
127*0Sstevel@tonic-gate 
128*0Sstevel@tonic-gate /*
129*0Sstevel@tonic-gate  * masks and flags for SSE/SSE2 MXCSR
130*0Sstevel@tonic-gate  */
131*0Sstevel@tonic-gate #define	SSE_IE 	0x00000001	/* invalid operation			*/
132*0Sstevel@tonic-gate #define	SSE_DE 	0x00000002	/* denormalized operand			*/
133*0Sstevel@tonic-gate #define	SSE_ZE	0x00000004	/* zero divide				*/
134*0Sstevel@tonic-gate #define	SSE_OE	0x00000008	/* overflow				*/
135*0Sstevel@tonic-gate #define	SSE_UE	0x00000010	/* underflow				*/
136*0Sstevel@tonic-gate #define	SSE_PE	0x00000020	/* precision				*/
137*0Sstevel@tonic-gate #define	SSE_DAZ	0x00000040	/* denormals are zero			*/
138*0Sstevel@tonic-gate #define	SSE_IM	0x00000080	/* invalid op exception mask		*/
139*0Sstevel@tonic-gate #define	SSE_DM	0x00000100	/* denormalize exception mask		*/
140*0Sstevel@tonic-gate #define	SSE_ZM	0x00000200	/* zero-divide exception mask		*/
141*0Sstevel@tonic-gate #define	SSE_OM	0x00000400	/* overflow exception mask		*/
142*0Sstevel@tonic-gate #define	SSE_UM	0x00000800	/* underflow exception mask		*/
143*0Sstevel@tonic-gate #define	SSE_PM	0x00001000	/* precision exception mask		*/
144*0Sstevel@tonic-gate #define	SSE_RC	0x00006000	/* rounding control			*/
145*0Sstevel@tonic-gate #define	SSE_RD	0x00002000	/* rounding control: round down		*/
146*0Sstevel@tonic-gate #define	SSE_RU	0x00004000	/* rounding control: round up		*/
147*0Sstevel@tonic-gate #define	SSE_FZ	0x00008000	/* flush to zero for masked underflow 	*/
148*0Sstevel@tonic-gate 
149*0Sstevel@tonic-gate #define	SSE_MXCSR_EFLAGS	\
150*0Sstevel@tonic-gate 	(SSE_IE|SSE_DE|SSE_ZE|SSE_OE|SSE_UE|SSE_PE)	/* 0x3f */
151*0Sstevel@tonic-gate 
152*0Sstevel@tonic-gate #define	SSE_MXCSR_INIT	\
153*0Sstevel@tonic-gate 	(SSE_IM|SSE_DM|SSE_ZM|SSE_OM|SSE_UM|SSE_PM)	/* 0x1f80 */
154*0Sstevel@tonic-gate 
155*0Sstevel@tonic-gate #define	SSE_MXCSR_MASK_DEFAULT	\
156*0Sstevel@tonic-gate 	(0xffff & ~SSE_DAZ)				/* 0xffbf */
157*0Sstevel@tonic-gate 
158*0Sstevel@tonic-gate #define	SSE_FMT_MXCSR	\
159*0Sstevel@tonic-gate 	"\20\20fz\17ru\16rd\15pm\14um\13om\12zm\11dm"	\
160*0Sstevel@tonic-gate 	"\10im\7daz\6pe\5ue\4oe\3ze\2de\1ie"
161*0Sstevel@tonic-gate 
162*0Sstevel@tonic-gate extern int fp_kind;		/* kind of fp support			*/
163*0Sstevel@tonic-gate extern int fpu_exists;		/* FPU hw exists			*/
164*0Sstevel@tonic-gate 
165*0Sstevel@tonic-gate #ifdef _KERNEL
166*0Sstevel@tonic-gate 
167*0Sstevel@tonic-gate extern uint32_t sse_mxcsr_mask;
168*0Sstevel@tonic-gate 
169*0Sstevel@tonic-gate extern void fpu_probe(void);
170*0Sstevel@tonic-gate 
171*0Sstevel@tonic-gate extern void fpnsave_begin(void *);
172*0Sstevel@tonic-gate extern void fpxsave_begin(void *);
173*0Sstevel@tonic-gate extern void (*fpsave_begin)(void *);
174*0Sstevel@tonic-gate 
175*0Sstevel@tonic-gate extern void fpsave(struct fnsave_state *);
176*0Sstevel@tonic-gate extern void fprestore(struct fnsave_state *);
177*0Sstevel@tonic-gate extern void fpxsave(struct fxsave_state *);
178*0Sstevel@tonic-gate extern void fpxrestore(struct fxsave_state *);
179*0Sstevel@tonic-gate 
180*0Sstevel@tonic-gate extern void fpenable(void);
181*0Sstevel@tonic-gate extern void fpdisable(void);
182*0Sstevel@tonic-gate extern void fpinit(void);
183*0Sstevel@tonic-gate 
184*0Sstevel@tonic-gate extern uint32_t fperr_reset(void);
185*0Sstevel@tonic-gate extern uint32_t fpxerr_reset(void);
186*0Sstevel@tonic-gate 
187*0Sstevel@tonic-gate extern uint32_t fpgetcwsw(void);
188*0Sstevel@tonic-gate extern uint32_t fpgetmxcsr(void);
189*0Sstevel@tonic-gate 
190*0Sstevel@tonic-gate struct regs;
191*0Sstevel@tonic-gate extern int fpnoextflt(struct regs *);
192*0Sstevel@tonic-gate extern int fpextovrflt(struct regs *);
193*0Sstevel@tonic-gate extern int fpexterrflt(struct regs *);
194*0Sstevel@tonic-gate extern int fpsimderrflt(struct regs *);
195*0Sstevel@tonic-gate extern void fpsetcw(uint16_t, uint32_t);
196*0Sstevel@tonic-gate 
197*0Sstevel@tonic-gate #endif	/* _KERNEL */
198*0Sstevel@tonic-gate 
199*0Sstevel@tonic-gate #ifdef __cplusplus
200*0Sstevel@tonic-gate }
201*0Sstevel@tonic-gate #endif
202*0Sstevel@tonic-gate 
203*0Sstevel@tonic-gate #endif	/* _SYS_FP_H */
204