1 /* $NetBSD: fpu.h,v 1.25 2020/07/15 09:19:49 rin Exp $ */ 2 3 /*- 4 * Copyright (C) 1996 Wolfgang Solfrank. 5 * Copyright (C) 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _POWERPC_FPU_H_ 35 #define _POWERPC_FPU_H_ 36 37 #define FPSCR_FX 0x80000000 /* Exception Summary */ 38 #define FPSCR_FEX 0x40000000 /* Enabled Exception Summary */ 39 #define FPSCR_VX 0x20000000 /* Invalid Operation Exception Summary */ 40 #define FPSCR_OX 0x10000000 /* Overflow Exception */ 41 #define FPSCR_UX 0x08000000 /* Undrflow Exception */ 42 #define FPSCR_ZX 0x04000000 /* Zero Divide Exception */ 43 #define FPSCR_XX 0x02000000 /* Inexact Exception */ 44 #define FPSCR_VXSNAN 0x01000000 /* Invalid Op (NAN) */ 45 #define FPSCR_VXISI 0x00800000 /* Invalid Op (INF-INF) */ 46 #define FPSCR_VXIDI 0x00400000 /* Invalid Op (INF/INF) */ 47 #define FPSCR_VXZDZ 0x00200000 /* Invalid Op (0/0) */ 48 #define FPSCR_VXIMZ 0x00100000 /* Invalid Op (INFx0) */ 49 #define FPSCR_VXVC 0x00080000 /* Invalid Compare Op */ 50 #define FPSCR_FR 0x00040000 /* Fraction Rounded */ 51 #define FPSCR_FI 0x00020000 /* Fraction Inexact */ 52 #define FPSCR_FPRF 0x0001f000 53 #define FPSCR_C 0x00010000 /* FP Class Descriptor */ 54 #define FPSCR_FPCC 0x0000f000 55 #define FPSCR_FL 0x00008000 /* < */ 56 #define FPSCR_FG 0x00004000 /* > */ 57 #define FPSCR_FE 0x00002000 /* == */ 58 #define FPSCR_FU 0x00001000 /* unordered */ 59 #define FPSCR_VXSOFT 0x00000400 /* Software Invalid Exception */ 60 #define FPSCR_VXSQRT 0x00000200 /* Invalid Sqrt Exception */ 61 #define FPSCR_VXCVI 0x00000100 /* Invalid Op Integer Cvt Exception */ 62 #define FPSCR_VE 0x00000080 /* Invalid Op Exception Enable */ 63 #define FPSCR_OE 0x00000040 /* Overflow Exception Enable */ 64 #define FPSCR_UE 0x00000020 /* Underflow Exception Enable */ 65 #define FPSCR_ZE 0x00000010 /* Zero Divide Exception Enable */ 66 #define FPSCR_XE 0x00000008 /* Inexact Exception Enable */ 67 #define FPSCR_NI 0x00000004 /* Non-IEEE Mode Enable */ 68 #define FPSCR_RN 0x00000003 69 70 #ifdef _KERNEL 71 72 #ifdef _KERNEL_OPT 73 #include "opt_ppcarch.h" 74 #endif 75 76 #include <sys/pcu.h> 77 #include <powerpc/mcontext.h> 78 79 struct lwp; 80 bool fpu_used_p(struct lwp *); 81 void fpu_mark_used(struct lwp *); 82 83 void fpu_restore_from_mcontext(struct lwp *, const mcontext_t *); 84 bool fpu_save_to_mcontext(struct lwp *, mcontext_t *, unsigned int *); 85 86 int fpu_get_fault_code(void); 87 88 extern const pcu_ops_t fpu_ops; 89 90 /* List of PowerPC architectures that support FPUs. */ 91 #if defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 92 #define PPC_HAVE_FPU 93 94 struct fpreg; 95 96 static __inline void 97 fpu_load(void) 98 { 99 pcu_load(&fpu_ops); 100 } 101 102 static __inline void 103 fpu_save(lwp_t *l) 104 { 105 pcu_save(&fpu_ops, l); 106 } 107 108 static __inline void 109 fpu_discard(lwp_t *l) 110 { 111 pcu_discard(&fpu_ops, l, false); 112 } 113 114 void fpu_load_from_fpreg(const struct fpreg *); 115 void fpu_unload_to_fpreg(struct fpreg *); 116 117 #endif /* PPC_HAVE_FPU */ 118 #endif /* _KERNEL */ 119 120 #endif /* _POWERPC_FPU_H_ */ 121