arch/alpha/lib/fpreg.c

   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 $f"#reg",%0" : "=m"(val));
  15 #endif
  16
  17 unsigned long
  18 alpha_read_fp_reg (unsigned long reg)
  19 {
  20         unsigned long val;
  21
  22         switch (reg) {
  23               case  0: STT( 0, val); break;
  24               case  1: STT( 1, val); break;
  25               case  2: STT( 2, val); break;
  26               case  3: STT( 3, val); break;
  27               case  4: STT( 4, val); break;
  28               case  5: STT( 5, val); break;
  29               case  6: STT( 6, val); break;
  30               case  7: STT( 7, val); break;
  31               case  8: STT( 8, val); break;
  32               case  9: STT( 9, val); break;
  33               case 10: STT(10, val); break;
  34               case 11: STT(11, val); break;
  35               case 12: STT(12, val); break;
  36               case 13: STT(13, val); break;
  37               case 14: STT(14, val); break;
  38               case 15: STT(15, val); break;
  39               case 16: STT(16, val); break;
  40               case 17: STT(17, val); break;
  41               case 18: STT(18, val); break;
  42               case 19: STT(19, val); break;
  43               case 20: STT(20, val); break;
  44               case 21: STT(21, val); break;
  45               case 22: STT(22, val); break;
  46               case 23: STT(23, val); break;
  47               case 24: STT(24, val); break;
  48               case 25: STT(25, val); break;
  49               case 26: STT(26, val); break;
  50               case 27: STT(27, val); break;
  51               case 28: STT(28, val); break;
  52               case 29: STT(29, val); break;
  53               case 30: STT(30, val); break;
  54               case 31: STT(31, val); break;
  55               default: return 0;
  56         }
  57         return val;
  58 }
  59 EXPORT_SYMBOL(alpha_read_fp_reg);
  60
  61 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
  62 #define LDT(reg,val)  asm volatile ("itoft %0,$f"#reg : : "r"(val));
  63 #else
  64 #define LDT(reg,val)  asm volatile ("ldt $f"#reg",%0" : : "m"(val));
  65 #endif
  66
  67 void
  68 alpha_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 }
 105 EXPORT_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 $f"#reg",%0" : "=m"(val));
 111 #endif
 112
 113 unsigned long
 114 alpha_read_fp_reg_s (unsigned long reg)
 115 {
 116         unsigned long val;
 117
 118         switch (reg) {
 119               case  0: STS( 0, val); break;
 120               case  1: STS( 1, val); break;
 121               case  2: STS( 2, val); break;
 122               case  3: STS( 3, val); break;
 123               case  4: STS( 4, val); break;
 124               case  5: STS( 5, val); break;
 125               case  6: STS( 6, val); break;
 126               case  7: STS( 7, val); break;
 127               case  8: STS( 8, val); break;
 128               case  9: STS( 9, val); break;
 129               case 10: STS(10, val); break;
 130               case 11: STS(11, val); break;
 131               case 12: STS(12, val); break;
 132               case 13: STS(13, val); break;
 133               case 14: STS(14, val); break;
 134               case 15: STS(15, val); break;
 135               case 16: STS(16, val); break;
 136               case 17: STS(17, val); break;
 137               case 18: STS(18, val); break;
 138               case 19: STS(19, val); break;
 139               case 20: STS(20, val); break;
 140               case 21: STS(21, val); break;
 141               case 22: STS(22, val); break;
 142               case 23: STS(23, val); break;
 143               case 24: STS(24, val); break;
 144               case 25: STS(25, val); break;
 145               case 26: STS(26, val); break;
 146               case 27: STS(27, val); break;
 147               case 28: STS(28, val); break;
 148               case 29: STS(29, val); break;
 149               case 30: STS(30, val); break;
 150               case 31: STS(31, val); break;
 151               default: return 0;
 152         }
 153         return val;
 154 }
 155 EXPORT_SYMBOL(alpha_read_fp_reg_s);
 156
 157 #if defined(CONFIG_ALPHA_EV6) || defined(CONFIG_ALPHA_EV67)
 158 #define LDS(reg,val)  asm volatile ("itofs %0,$f"#reg : : "r"(val));
 159 #else
 160 #define LDS(reg,val)  asm volatile ("lds $f"#reg",%0" : : "m"(val));
 161 #endif
 162
 163 void
 164 alpha_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 }
 201 EXPORT_SYMBOL(alpha_write_fp_reg_s);