1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 28 /* All Rights Reserved */ 29 30 #ifndef _SYS_FP_H 31 #define _SYS_FP_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * 80287/80387 and SSE/SSE2 floating point processor definitions 41 */ 42 43 /* 44 * values that go into fp_kind 45 */ 46 #define FP_NO 0 /* no fp chip, no emulator (no fp support) */ 47 #define FP_SW 1 /* no fp chip, using software emulator */ 48 #define FP_HW 2 /* chip present bit */ 49 #define FP_287 2 /* 80287 chip present */ 50 #define FP_387 3 /* 80387 chip present */ 51 #define FP_487 6 /* 80487 chip present */ 52 #define FP_486 6 /* 80486 chip present */ 53 #define __FP_SSE 0x103 /* x87 plus SSE-capable CPU */ 54 55 /* 56 * masks for 80387 control word 57 */ 58 #define FPIM 0x00000001 /* invalid operation */ 59 #define FPDM 0x00000002 /* denormalized operand */ 60 #define FPZM 0x00000004 /* zero divide */ 61 #define FPOM 0x00000008 /* overflow */ 62 #define FPUM 0x00000010 /* underflow */ 63 #define FPPM 0x00000020 /* precision */ 64 #define FPPC 0x00000300 /* precision control */ 65 #define FPRC 0x00000C00 /* rounding control */ 66 #define FPIC 0x00001000 /* infinity control */ 67 #define WFPDE 0x00000080 /* data chain exception */ 68 69 /* 70 * (Old symbol compatibility) 71 */ 72 #define FPINV FPIM 73 #define FPDNO FPDM 74 #define FPZDIV FPZM 75 #define FPOVR FPOM 76 #define FPUNR FPUM 77 #define FPPRE FPPM 78 79 /* 80 * precision, rounding, and infinity options in control word 81 */ 82 #define FPSIG24 0x00000000 /* 24-bit significand precision (short) */ 83 #define FPSIG53 0x00000200 /* 53-bit significand precision (long) */ 84 #define FPSIG64 0x00000300 /* 64-bit significand precision (temp) */ 85 #define FPRTN 0x00000000 /* round to nearest or even */ 86 #define FPRD 0x00000400 /* round down */ 87 #define FPRU 0x00000800 /* round up */ 88 #define FPCHOP 0x00000C00 /* chop (truncate toward zero) */ 89 #define FPP 0x00000000 /* projective infinity */ 90 #define FPA 0x00001000 /* affine infinity */ 91 #define WFPB17 0x00020000 /* bit 17 */ 92 #define WFPB24 0x00040000 /* bit 24 */ 93 94 /* 95 * masks for 80387 status word 96 */ 97 #define FPS_IE 0x00000001 /* invalid operation */ 98 #define FPS_DE 0x00000002 /* denormalized operand */ 99 #define FPS_ZE 0x00000004 /* zero divide */ 100 #define FPS_OE 0x00000008 /* overflow */ 101 #define FPS_UE 0x00000010 /* underflow */ 102 #define FPS_PE 0x00000020 /* precision */ 103 #define FPS_SF 0x00000040 /* stack fault */ 104 #define FPS_ES 0x00000080 /* error summary bit */ 105 #define FPS_C0 0x00000100 /* C0 bit */ 106 #define FPS_C1 0x00000200 /* C1 bit */ 107 #define FPS_C2 0x00000400 /* C2 bit */ 108 #define FPS_TOP 0x00003800 /* top of stack pointer */ 109 #define FPS_C3 0x00004000 /* C3 bit */ 110 #define FPS_B 0x00008000 /* busy bit */ 111 112 /* 113 * Exception flags manually cleared during x87 exception handling. 114 */ 115 #define FPS_SW_EFLAGS \ 116 (FPS_IE|FPS_DE|FPS_ZE|FPS_OE|FPS_UE|FPS_PE|FPS_SF|FPS_ES|FPS_B) 117 118 /* 119 * Initial value of FPU control word as per 4th ed. ABI document 120 * - affine infinity 121 * - round to nearest or even 122 * - 64-bit double precision 123 * - all exceptions masked 124 */ 125 #define FPU_CW_INIT 0x133f 126 127 /* 128 * masks and flags for SSE/SSE2 MXCSR 129 */ 130 #define SSE_IE 0x00000001 /* invalid operation */ 131 #define SSE_DE 0x00000002 /* denormalized operand */ 132 #define SSE_ZE 0x00000004 /* zero divide */ 133 #define SSE_OE 0x00000008 /* overflow */ 134 #define SSE_UE 0x00000010 /* underflow */ 135 #define SSE_PE 0x00000020 /* precision */ 136 #define SSE_DAZ 0x00000040 /* denormals are zero */ 137 #define SSE_IM 0x00000080 /* invalid op exception mask */ 138 #define SSE_DM 0x00000100 /* denormalize exception mask */ 139 #define SSE_ZM 0x00000200 /* zero-divide exception mask */ 140 #define SSE_OM 0x00000400 /* overflow exception mask */ 141 #define SSE_UM 0x00000800 /* underflow exception mask */ 142 #define SSE_PM 0x00001000 /* precision exception mask */ 143 #define SSE_RC 0x00006000 /* rounding control */ 144 #define SSE_RD 0x00002000 /* rounding control: round down */ 145 #define SSE_RU 0x00004000 /* rounding control: round up */ 146 #define SSE_FZ 0x00008000 /* flush to zero for masked underflow */ 147 148 #define SSE_MXCSR_EFLAGS \ 149 (SSE_IE|SSE_DE|SSE_ZE|SSE_OE|SSE_UE|SSE_PE) /* 0x3f */ 150 151 #define SSE_MXCSR_INIT \ 152 (SSE_IM|SSE_DM|SSE_ZM|SSE_OM|SSE_UM|SSE_PM) /* 0x1f80 */ 153 154 #define SSE_MXCSR_MASK_DEFAULT \ 155 (0xffff & ~SSE_DAZ) /* 0xffbf */ 156 157 #define SSE_FMT_MXCSR \ 158 "\20\20fz\17ru\16rd\15pm\14um\13om\12zm\11dm" \ 159 "\10im\7daz\6pe\5ue\4oe\3ze\2de\1ie" 160 161 extern int fp_kind; /* kind of fp support */ 162 extern int fpu_exists; /* FPU hw exists */ 163 164 #ifdef _KERNEL 165 166 extern int fpu_ignored; 167 extern int fpu_pentium_fdivbug; 168 169 extern uint32_t sse_mxcsr_mask; 170 171 extern void fpu_probe(void); 172 extern uint_t fpu_initial_probe(void); 173 extern int fpu_probe_pentium_fdivbug(void); 174 175 extern void fpnsave_ctxt(void *); 176 extern void fpxsave_ctxt(void *); 177 extern void (*fpsave_ctxt)(void *); 178 179 struct fnsave_state; 180 struct fxsave_state; 181 extern void fxsave_insn(struct fxsave_state *); 182 extern void fpsave(struct fnsave_state *); 183 extern void fprestore(struct fnsave_state *); 184 extern void fpxsave(struct fxsave_state *); 185 extern void fpxrestore(struct fxsave_state *); 186 187 extern void fpenable(void); 188 extern void fpdisable(void); 189 extern void fpinit(void); 190 191 extern uint32_t fperr_reset(void); 192 extern uint32_t fpxerr_reset(void); 193 194 extern uint32_t fpgetcwsw(void); 195 extern uint32_t fpgetmxcsr(void); 196 197 struct regs; 198 extern int fpnoextflt(struct regs *); 199 extern int fpextovrflt(struct regs *); 200 extern int fpexterrflt(struct regs *); 201 extern int fpsimderrflt(struct regs *); 202 extern void fpsetcw(uint16_t, uint32_t); 203 204 #endif /* _KERNEL */ 205 206 #ifdef __cplusplus 207 } 208 #endif 209 210 #endif /* _SYS_FP_H */ 211