arch/x86/math-emu/fpu_arith.c

   1 /*---------------------------------------------------------------------------+
   2  |  fpu_arith.c                                                              |
   3  |                                                                           |
   4  | Code to implement the FPU register/register arithmetic instructions       |
   5  |                                                                           |
   6  | Copyright (C) 1992,1993,1997                                              |
   7  |                  W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
   8  |                  E-mail   billm@suburbia.net                              |
   9  |                                                                           |
  10  |                                                                           |
  11  +---------------------------------------------------------------------------*/
  12
  13 #include "fpu_system.h"
  14 #include "fpu_emu.h"
  15 #include "control_w.h"
  16 #include "status_w.h"
  17
  18 void fadd__(void)
  19 {
  20         /* fadd st,st(i) */
  21         int i = FPU_rm;
  22         clear_C1();
  23         FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
  24 }
  25
  26 void fmul__(void)
  27 {
  28         /* fmul st,st(i) */
  29         int i = FPU_rm;
  30         clear_C1();
  31         FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
  32 }
  33
  34 void fsub__(void)
  35 {
  36         /* fsub st,st(i) */
  37         clear_C1();
  38         FPU_sub(0, FPU_rm, control_word);
  39 }
  40
  41 void fsubr_(void)
  42 {
  43         /* fsubr st,st(i) */
  44         clear_C1();
  45         FPU_sub(REV, FPU_rm, control_word);
  46 }
  47
  48 void fdiv__(void)
  49 {
  50         /* fdiv st,st(i) */
  51         clear_C1();
  52         FPU_div(0, FPU_rm, control_word);
  53 }
  54
  55 void fdivr_(void)
  56 {
  57         /* fdivr st,st(i) */
  58         clear_C1();
  59         FPU_div(REV, FPU_rm, control_word);
  60 }
  61
  62 void fadd_i(void)
  63 {
  64         /* fadd st(i),st */
  65         int i = FPU_rm;
  66         clear_C1();
  67         FPU_add(&st(i), FPU_gettagi(i), i, control_word);
  68 }
  69
  70 void fmul_i(void)
  71 {
  72         /* fmul st(i),st */
  73         clear_C1();
  74         FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
  75 }
  76
  77 void fsubri(void)
  78 {
  79         /* fsubr st(i),st */
  80         clear_C1();
  81         FPU_sub(DEST_RM, FPU_rm, control_word);
  82 }
  83
  84 void fsub_i(void)
  85 {
  86         /* fsub st(i),st */
  87         clear_C1();
  88         FPU_sub(REV | DEST_RM, FPU_rm, control_word);
  89 }
  90
  91 void fdivri(void)
  92 {
  93         /* fdivr st(i),st */
  94         clear_C1();
  95         FPU_div(DEST_RM, FPU_rm, control_word);
  96 }
  97
  98 void fdiv_i(void)
  99 {
 100         /* fdiv st(i),st */
 101         clear_C1();
 102         FPU_div(REV | DEST_RM, FPU_rm, control_word);
 103 }
 104
 105 void faddp_(void)
 106 {
 107         /* faddp st(i),st */
 108         int i = FPU_rm;
 109         clear_C1();
 110         if (FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0)
 111                 FPU_pop();
 112 }
 113
 114 void fmulp_(void)
 115 {
 116         /* fmulp st(i),st */
 117         clear_C1();
 118         if (FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0)
 119                 FPU_pop();
 120 }
 121
 122 void fsubrp(void)
 123 {
 124         /* fsubrp st(i),st */
 125         clear_C1();
 126         if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0)
 127                 FPU_pop();
 128 }
 129
 130 void fsubp_(void)
 131 {
 132         /* fsubp st(i),st */
 133         clear_C1();
 134         if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0)
 135                 FPU_pop();
 136 }
 137
 138 void fdivrp(void)
 139 {
 140         /* fdivrp st(i),st */
 141         clear_C1();
 142         if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0)
 143                 FPU_pop();
 144 }
 145
 146 void fdivp_(void)
 147 {
 148         /* fdivp st(i),st */
 149         clear_C1();
 150         if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0)
 151                 FPU_pop();
 152 }