linux/arch/alpha/lib/fpreg.c
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   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