git.oblomov.eu Git - linux-2.6/blob - arch/sparc/math-emu/sfp-util.h

   1 #include <linux/kernel.h>
   2 #include <linux/sched.h>
   3 #include <linux/types.h>
   4 #include <asm/byteorder.h>
   5
   6 #define add_ssaaaa(sh, sl, ah, al, bh, bl)                              \
   7   __asm__ ("addcc %r4,%5,%1\n\t"                                                \
   8            "addx %r2,%3,%0\n"                                           \
   9            : "=r" ((USItype)(sh)),                                      \
  10              "=&r" ((USItype)(sl))                                      \
  11            : "%rJ" ((USItype)(ah)),                                     \
  12              "rI" ((USItype)(bh)),                                      \
  13              "%rJ" ((USItype)(al)),                                     \
  14              "rI" ((USItype)(bl))                                       \
  15            : "cc")
  16 #define sub_ddmmss(sh, sl, ah, al, bh, bl)                              \
  17   __asm__ ("subcc %r4,%5,%1\n\t"                                                \
  18            "subx %r2,%3,%0\n"                                           \
  19            : "=r" ((USItype)(sh)),                                      \
  20              "=&r" ((USItype)(sl))                                      \
  21            : "rJ" ((USItype)(ah)),                                      \
  22              "rI" ((USItype)(bh)),                                      \
  23              "rJ" ((USItype)(al)),                                      \
  24              "rI" ((USItype)(bl))                                       \
  25            : "cc")
  26
  27 #define umul_ppmm(w1, w0, u, v) \
  28   __asm__ ("! Inlined umul_ppmm\n\t"                                    \
  29         "wr     %%g0,%2,%%y     ! SPARC has 0-3 delay insn after a wr\n\t" \
  30         "sra    %3,31,%%g2      ! Don't move this insn\n\t"             \
  31         "and    %2,%%g2,%%g2    ! Don't move this insn\n\t"             \
  32         "andcc  %%g0,0,%%g1     ! Don't move this insn\n\t"             \
  33         "mulscc %%g1,%3,%%g1\n\t"                                       \
  34         "mulscc %%g1,%3,%%g1\n\t"                                       \
  35         "mulscc %%g1,%3,%%g1\n\t"                                       \
  36         "mulscc %%g1,%3,%%g1\n\t"                                       \
  37         "mulscc %%g1,%3,%%g1\n\t"                                       \
  38         "mulscc %%g1,%3,%%g1\n\t"                                       \
  39         "mulscc %%g1,%3,%%g1\n\t"                                       \
  40         "mulscc %%g1,%3,%%g1\n\t"                                       \
  41         "mulscc %%g1,%3,%%g1\n\t"                                       \
  42         "mulscc %%g1,%3,%%g1\n\t"                                       \
  43         "mulscc %%g1,%3,%%g1\n\t"                                       \
  44         "mulscc %%g1,%3,%%g1\n\t"                                       \
  45         "mulscc %%g1,%3,%%g1\n\t"                                       \
  46         "mulscc %%g1,%3,%%g1\n\t"                                       \
  47         "mulscc %%g1,%3,%%g1\n\t"                                       \
  48         "mulscc %%g1,%3,%%g1\n\t"                                       \
  49         "mulscc %%g1,%3,%%g1\n\t"                                       \
  50         "mulscc %%g1,%3,%%g1\n\t"                                       \
  51         "mulscc %%g1,%3,%%g1\n\t"                                       \
  52         "mulscc %%g1,%3,%%g1\n\t"                                       \
  53         "mulscc %%g1,%3,%%g1\n\t"                                       \
  54         "mulscc %%g1,%3,%%g1\n\t"                                       \
  55         "mulscc %%g1,%3,%%g1\n\t"                                       \
  56         "mulscc %%g1,%3,%%g1\n\t"                                       \
  57         "mulscc %%g1,%3,%%g1\n\t"                                       \
  58         "mulscc %%g1,%3,%%g1\n\t"                                       \
  59         "mulscc %%g1,%3,%%g1\n\t"                                       \
  60         "mulscc %%g1,%3,%%g1\n\t"                                       \
  61         "mulscc %%g1,%3,%%g1\n\t"                                       \
  62         "mulscc %%g1,%3,%%g1\n\t"                                       \
  63         "mulscc %%g1,%3,%%g1\n\t"                                       \
  64         "mulscc %%g1,%3,%%g1\n\t"                                       \
  65         "mulscc %%g1,0,%%g1\n\t"                                        \
  66         "add    %%g1,%%g2,%0\n\t"                                       \
  67         "rd     %%y,%1\n"                                               \
  68            : "=r" ((USItype)(w1)),                                      \
  69              "=r" ((USItype)(w0))                                       \
  70            : "%rI" ((USItype)(u)),                                      \
  71              "r" ((USItype)(v))                                         \
  72            : "%g1", "%g2", "cc")
  73
  74 /* It's quite necessary to add this much assembler for the sparc.
  75    The default udiv_qrnnd (in C) is more than 10 times slower!  */
  76 #define udiv_qrnnd(q, r, n1, n0, d) \
  77   __asm__ ("! Inlined udiv_qrnnd\n\t"                                   \
  78            "mov 32,%%g1\n\t"                                            \
  79            "subcc       %1,%2,%%g0\n\t"                                 \
  80            "1:  bcs     5f\n\t"                                         \
  81            "addxcc %0,%0,%0     ! shift n1n0 and a q-bit in lsb\n\t"    \
  82            "sub %1,%2,%1        ! this kills msb of n\n\t"              \
  83            "addx        %1,%1,%1        ! so this can't give carry\n\t" \
  84            "subcc       %%g1,1,%%g1\n\t"                                \
  85            "2:  bne     1b\n\t"                                         \
  86            "subcc       %1,%2,%%g0\n\t"                                 \
  87            "bcs 3f\n\t"                                                 \
  88            "addxcc %0,%0,%0     ! shift n1n0 and a q-bit in lsb\n\t"    \
  89            "b           3f\n\t"                                         \
  90            "sub %1,%2,%1        ! this kills msb of n\n\t"              \
  91            "4:  sub     %1,%2,%1\n\t"                                   \
  92            "5:  addxcc  %1,%1,%1\n\t"                                   \
  93            "bcc 2b\n\t"                                                 \
  94            "subcc       %%g1,1,%%g1\n\t"                                \
  95            "! Got carry from n.  Subtract next step to cancel this carry.\n\t" \
  96            "bne 4b\n\t"                                                 \
  97            "addcc       %0,%0,%0        ! shift n1n0 and a 0-bit in lsb\n\t" \
  98            "sub %1,%2,%1\n\t"                                           \
  99            "3:  xnor    %0,0,%0\n\t"                                    \
 100            "! End of inline udiv_qrnnd\n"                               \
 101            : "=&r" ((USItype)(q)),                                      \
 102              "=&r" ((USItype)(r))                                       \
 103            : "r" ((USItype)(d)),                                        \
 104              "1" ((USItype)(n1)),                                       \
 105              "0" ((USItype)(n0)) : "%g1", "cc")
 106 #define UDIV_NEEDS_NORMALIZATION 0
 107
 108 #define abort()                                                         \
 109         return 0
 110
 111 #ifdef __BIG_ENDIAN
 112 #define __BYTE_ORDER __BIG_ENDIAN
 113 #else
 114 #define __BYTE_ORDER __LITTLE_ENDIAN
 115 #endif