1// SPDX-License-Identifier: GPL-2.0 2/* 3 * arch/alpha/lib/fpreg.c 4 * 5 * (C) Copyright 1998 Linus Torvalds 6 */ 7 8#include <linux/compiler.h> 9#include <linux/export.h> 10 11#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67) 12#define STT(reg,val) asm volatile ("ftoit $f"#reg",%0" : "=r"(val)); 13#else 14#define STT(reg,val) asm volatile ("stt $f"#reg",%0" : "=m"(val)); 15#endif 16 17unsigned long 18alpha_read_fp_reg (unsigned long reg) 19{ 20 unsigned long val; 21 22 switch (reg) { 23 case 0: STT( 0, val); break; 24 case 1: STT( 1, val); break; 25 case 2: STT( 2, val); break; 26 case 3: STT( 3, val); break; 27 case 4: STT( 4, val); break; 28 case 5: STT( 5, val); break; 29 case 6: STT( 6, val); break; 30 case 7: STT( 7, val); break; 31 case 8: STT( 8, val); break; 32 case 9: STT( 9, val); break; 33 case 10: STT(10, val); break; 34 case 11: STT(11, val); break; 35 case 12: STT(12, val); break; 36 case 13: STT(13, val); break; 37 case 14: STT(14, val); break; 38 case 15: STT(15, val); break; 39 case 16: STT(16, val); break; 40 case 17: STT(17, val); break; 41 case 18: STT(18, val); break; 42 case 19: STT(19, val); break; 43 case 20: STT(20, val); break; 44 case 21: STT(21, val); break; 45 case 22: STT(22, val); break; 46 case 23: STT(23, val); break; 47 case 24: STT(24, val); break; 48 case 25: STT(25, val); break; 49 case 26: STT(26, val); break; 50 case 27: STT(27, val); break; 51 case 28: STT(28, val); break; 52 case 29: STT(29, val); break; 53 case 30: STT(30, val); break; 54 case 31: STT(31, val); break; 55 default: return 0; 56 } 57 return val; 58} 59EXPORT_SYMBOL(alpha_read_fp_reg); 60 61#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67) 62#define LDT(reg,val) asm volatile ("itoft %0,$f"#reg : : "r"(val)); 63#else 64#define LDT(reg,val) asm volatile ("ldt $f"#reg",%0" : : "m"(val)); 65#endif 66 67void 68alpha_write_fp_reg (unsigned long reg, unsigned long val) 69{ 70 switch (reg) { 71 case 0: LDT( 0, val); break; 72 case 1: LDT( 1, val); break; 73 case 2: LDT( 2, val); break; 74 case 3: LDT( 3, val); break; 75 case 4: LDT( 4, val); break; 76 case 5: LDT( 5, val); break; 77 case 6: LDT( 6, val); break; 78 case 7: LDT( 7, val); break; 79 case 8: LDT( 8, val); break; 80 case 9: LDT( 9, val); break; 81 case 10: LDT(10, val); break; 82 case 11: LDT(11, val); break; 83 case 12: LDT(12, val); break; 84 case 13: LDT(13, val); break; 85 case 14: LDT(14, val); break; 86 case 15: LDT(15, val); break; 87 case 16: LDT(16, val); break; 88 case 17: LDT(17, val); break; 89 case 18: LDT(18, val); break; 90 case 19: LDT(19, val); break; 91 case 20: LDT(20, val); break; 92 case 21: LDT(21, val); break; 93 case 22: LDT(22, val); break; 94 case 23: LDT(23, val); break; 95 case 24: LDT(24, val); break; 96 case 25: LDT(25, val); break; 97 case 26: LDT(26, val); break; 98 case 27: LDT(27, val); break; 99 case 28: LDT(28, val); break; 100 case 29: LDT(29, val); break; 101 case 30: LDT(30, val); break; 102 case 31: LDT(31, val); break; 103 } 104} 105EXPORT_SYMBOL(alpha_write_fp_reg); 106 107#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67) 108#define STS(reg,val) asm volatile ("ftois $f"#reg",%0" : "=r"(val)); 109#else 110#define STS(reg,val) asm volatile ("sts $f"#reg",%0" : "=m"(val)); 111#endif 112 113unsigned long 114alpha_read_fp_reg_s (unsigned long reg) 115{ 116 unsigned long val; 117 118 switch (reg) { 119 case 0: STS( 0, val); break; 120 case 1: STS( 1, val); break; 121 case 2: STS( 2, val); break; 122 case 3: STS( 3, val); break; 123 case 4: STS( 4, val); break; 124 case 5: STS( 5, val); break; 125 case 6: STS( 6, val); break; 126 case 7: STS( 7, val); break; 127 case 8: STS( 8, val); break; 128 case 9: STS( 9, val); break; 129 case 10: STS(10, val); break; 130 case 11: STS(11, val); break; 131 case 12: STS(12, val); break; 132 case 13: STS(13, val); break; 133 case 14: STS(14, val); break; 134 case 15: STS(15, val); break; 135 case 16: STS(16, val); break; 136 case 17: STS(17, val); break; 137 case 18: STS(18, val); break; 138 case 19: STS(19, val); break; 139 case 20: STS(20, val); break; 140 case 21: STS(21, val); break; 141 case 22: STS(22, val); break; 142 case 23: STS(23, val); break; 143 case 24: STS(24, val); break; 144 case 25: STS(25, val); break; 145 case 26: STS(26, val); break; 146 case 27: STS(27, val); break; 147 case 28: STS(28, val); break; 148 case 29: STS(29, val); break; 149 case 30: STS(30, val); break; 150 case 31: STS(31, val); break; 151 default: return 0; 152 } 153 return val; 154} 155EXPORT_SYMBOL(alpha_read_fp_reg_s); 156 157#if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67) 158#define LDS(reg,val) asm volatile ("itofs %0,$f"#reg : : "r"(val)); 159#else 160#define LDS(reg,val) asm volatile ("lds $f"#reg",%0" : : "m"(val)); 161#endif 162 163void 164alpha_write_fp_reg_s (unsigned long reg, unsigned long val) 165{ 166 switch (reg) { 167 case 0: LDS( 0, val); break; 168 case 1: LDS( 1, val); break; 169 case 2: LDS( 2, val); break; 170 case 3: LDS( 3, val); break; 171 case 4: LDS( 4, val); break; 172 case 5: LDS( 5, val); break; 173 case 6: LDS( 6, val); break; 174 case 7: LDS( 7, val); break; 175 case 8: LDS( 8, val); break; 176 case 9: LDS( 9, val); break; 177 case 10: LDS(10, val); break; 178 case 11: LDS(11, val); break; 179 case 12: LDS(12, val); break; 180 case 13: LDS(13, val); break; 181 case 14: LDS(14, val); break; 182 case 15: LDS(15, val); break; 183 case 16: LDS(16, val); break; 184 case 17: LDS(17, val); break; 185 case 18: LDS(18, val); break; 186 case 19: LDS(19, val); break; 187 case 20: LDS(20, val); break; 188 case 21: LDS(21, val); break; 189 case 22: LDS(22, val); break; 190 case 23: LDS(23, val); break; 191 case 24: LDS(24, val); break; 192 case 25: LDS(25, val); break; 193 case 26: LDS(26, val); break; 194 case 27: LDS(27, val); break; 195 case 28: LDS(28, val); break; 196 case 29: LDS(29, val); break; 197 case 30: LDS(30, val); break; 198 case 31: LDS(31, val); break; 199 } 200} 201EXPORT_SYMBOL(alpha_write_fp_reg_s); 202