1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 23 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 25 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD: head/lib/libc/sparc64/fpu/fpu_reg.h 327232 2017-12-27 03:23:41Z eadler $ 28 */ 29 30 #ifndef _LIBC_SPARC64_FPU_FPU_REG_H_ 31 #define _LIBC_SPARC64_FPU_FPU_REG_H_ 32 33 #include <stdint.h> 34 35 /* 36 * These are not really of type char[]. They are arrays of functions defined 37 * in fpu_reg.S; each array member loads/stores a certain fpu register of the 38 * given size. 39 */ 40 extern char __fpu_ld32[]; 41 extern char __fpu_st32[]; 42 extern char __fpu_ld64[]; 43 extern char __fpu_st64[]; 44 45 /* Size of the functions in the arrays. */ 46 #define FPU_LD32_SZ 8 47 #define FPU_ST32_SZ 8 48 #define FPU_LD64_SZ 8 49 #define FPU_ST64_SZ 8 50 51 /* Typedefs for convenient casts in the functions below. */ 52 typedef void (fp_ldst32_fn)(uint32_t *); 53 typedef void (fp_ldst64_fn)(uint64_t *); 54 55 /* 56 * These are the functions that are actually used in the fpu emulation code to 57 * access the fp registers. They are usually not used more than once, so 58 * caching needs not be done here. 59 */ 60 static __inline uint32_t 61 __fpu_getreg(int r) 62 { 63 uint32_t rv; 64 65 ((fp_ldst32_fn *)&__fpu_st32[r * FPU_ST32_SZ])(&rv); 66 return (rv); 67 } 68 69 static __inline uint64_t 70 __fpu_getreg64(int r) 71 { 72 uint64_t rv; 73 74 ((fp_ldst64_fn *)&__fpu_st64[(r >> 1) * FPU_ST64_SZ])(&rv); 75 return (rv); 76 } 77 78 static __inline void 79 __fpu_setreg(int r, uint32_t v) 80 { 81 82 ((fp_ldst32_fn *)&__fpu_ld32[r * FPU_LD32_SZ])(&v); 83 } 84 85 static __inline void 86 __fpu_setreg64(int r, uint64_t v) 87 { 88 89 ((fp_ldst64_fn *)&__fpu_ld64[(r >> 1) * FPU_LD64_SZ])(&v); 90 } 91 92 #endif /* _LIBC_SPARC64_FPU_FPU_REG_H_ */ 93