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  1. /* Machine-dependent software floating-point definitions.
  2.    Sparc userland (_Q_*) version.
  3.    Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
  4.    This file is part of the GNU C Library.
  5.    Contributed by Richard Henderson (rth@cygnus.com),
  6.           Jakub Jelinek (jj@ultra.linux.cz),
  7.           David S. Miller (davem@redhat.com) and
  8.           Peter Maydell (pmaydell@chiark.greenend.org.uk).
  9.  
  10.    The GNU C Library is free software; you can redistribute it and/or
  11.    modify it under the terms of the GNU Library General Public License as
  12.    published by the Free Software Foundation; either version 2 of the
  13.    License, or (at your option) any later version.
  14.  
  15.    The GNU C Library is distributed in the hope that it will be useful,
  16.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18.    Library General Public License for more details.
  19.  
  20.    You should have received a copy of the GNU Library General Public
  21.    License along with the GNU C Library; see the file COPYING.LIB.  If
  22.    not, write to the Free Software Foundation, Inc.,
  23.    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  24.  
  25. #ifndef _SFP_MACHINE_H
  26. #define _SFP_MACHINE_H
  27.  
  28.    
  29. #define _FP_W_TYPE_SIZE        32
  30. #define _FP_W_TYPE        unsigned long
  31. #define _FP_WS_TYPE        signed long
  32. #define _FP_I_TYPE        long
  33.  
  34. #define _FP_MUL_MEAT_S(R,X,Y)                    \
  35.   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  36. #define _FP_MUL_MEAT_D(R,X,Y)                    \
  37.   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  38. #define _FP_MUL_MEAT_Q(R,X,Y)                    \
  39.   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  40.  
  41. #define _FP_DIV_MEAT_S(R,X,Y)    _FP_DIV_MEAT_1_udiv(S,R,X,Y)
  42. #define _FP_DIV_MEAT_D(R,X,Y)    _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  43. #define _FP_DIV_MEAT_Q(R,X,Y)    _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  44.  
  45. #define _FP_NANFRAC_S        ((_FP_QNANBIT_S << 1) - 1)
  46. #define _FP_NANFRAC_D        ((_FP_QNANBIT_D << 1) - 1), -1
  47. #define _FP_NANFRAC_Q        ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
  48. #define _FP_NANSIGN_S        0
  49. #define _FP_NANSIGN_D        0
  50. #define _FP_NANSIGN_Q        0
  51.  
  52. #define _FP_KEEPNANFRACP 1
  53.  
  54. /* If one NaN is signaling and the other is not,
  55.  * we choose that one, otherwise we choose X.
  56.  */
  57. /* For _Qp_* and _Q_*, this should prefer X, for
  58.  * CPU instruction emulation this should prefer Y.
  59.  * (see SPAMv9 B.2.2 section).
  60.  */
  61. #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)            \
  62.   do {                                \
  63.     if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)        \
  64.     && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))    \
  65.       {                                \
  66.     R##_s = X##_s;                        \
  67.     _FP_FRAC_COPY_##wc(R,X);                \
  68.       }                                \
  69.     else                            \
  70.       {                                \
  71.     R##_s = Y##_s;                        \
  72.     _FP_FRAC_COPY_##wc(R,Y);                \
  73.       }                                \
  74.     R##_c = FP_CLS_NAN;                        \
  75.   } while (0)
  76.  
  77. /* Some assembly to speed things up. */
  78. #define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)            \
  79.   __asm__ ("addcc %r7,%8,%2\n\t"                    \
  80.        "addxcc %r5,%6,%1\n\t"                    \
  81.        "addx %r3,%4,%0\n"                        \
  82.        : "=r" ((USItype)(r2)),                    \
  83.          "=&r" ((USItype)(r1)),                    \
  84.          "=&r" ((USItype)(r0))                    \
  85.        : "%rJ" ((USItype)(x2)),                    \
  86.          "rI" ((USItype)(y2)),                    \
  87.          "%rJ" ((USItype)(x1)),                    \
  88.          "rI" ((USItype)(y1)),                    \
  89.          "%rJ" ((USItype)(x0)),                    \
  90.          "rI" ((USItype)(y0))                    \
  91.        : "cc")
  92.  
  93. #define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)            \
  94.   __asm__ ("subcc %r7,%8,%2\n\t"                    \
  95.         "subxcc %r5,%6,%1\n\t"                    \
  96.         "subx %r3,%4,%0\n"                        \
  97.        : "=r" ((USItype)(r2)),                    \
  98.          "=&r" ((USItype)(r1)),                    \
  99.          "=&r" ((USItype)(r0))                    \
  100.        : "%rJ" ((USItype)(x2)),                    \
  101.          "rI" ((USItype)(y2)),                    \
  102.          "%rJ" ((USItype)(x1)),                    \
  103.          "rI" ((USItype)(y1)),                    \
  104.          "%rJ" ((USItype)(x0)),                    \
  105.          "rI" ((USItype)(y0))                    \
  106.        : "cc")
  107.  
  108. #define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)        \
  109.   do {                                    \
  110.     /* We need to fool gcc,  as we need to pass more than 10        \
  111.        input/outputs.  */                        \
  112.     register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2");        \
  113.     __asm__ __volatile__ (                        \
  114.         "addcc %r8,%9,%1\n\t"                    \
  115.         "addxcc %r6,%7,%0\n\t"                    \
  116.         "addxcc %r4,%5,%%g2\n\t"                    \
  117.         "addx %r2,%3,%%g1\n\t"                    \
  118.        : "=&r" ((USItype)(r1)),                    \
  119.          "=&r" ((USItype)(r0))                    \
  120.        : "%rJ" ((USItype)(x3)),                    \
  121.          "rI" ((USItype)(y3)),                    \
  122.          "%rJ" ((USItype)(x2)),                    \
  123.          "rI" ((USItype)(y2)),                    \
  124.          "%rJ" ((USItype)(x1)),                    \
  125.          "rI" ((USItype)(y1)),                    \
  126.          "%rJ" ((USItype)(x0)),                    \
  127.          "rI" ((USItype)(y0))                    \
  128.        : "cc", "g1", "g2");                        \
  129.     __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2));            \
  130.     r3 = _t1; r2 = _t2;                            \
  131.   } while (0)
  132.  
  133. #define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)        \
  134.   do {                                    \
  135.     /* We need to fool gcc,  as we need to pass more than 10        \
  136.        input/outputs.  */                        \
  137.     register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2");        \
  138.     __asm__ __volatile__ (                        \
  139.         "subcc %r8,%9,%1\n\t"                    \
  140.         "subxcc %r6,%7,%0\n\t"                    \
  141.         "subxcc %r4,%5,%%g2\n\t"                    \
  142.         "subx %r2,%3,%%g1\n\t"                    \
  143.        : "=&r" ((USItype)(r1)),                    \
  144.          "=&r" ((USItype)(r0))                    \
  145.        : "%rJ" ((USItype)(x3)),                    \
  146.          "rI" ((USItype)(y3)),                    \
  147.          "%rJ" ((USItype)(x2)),                    \
  148.          "rI" ((USItype)(y2)),                    \
  149.          "%rJ" ((USItype)(x1)),                    \
  150.          "rI" ((USItype)(y1)),                    \
  151.          "%rJ" ((USItype)(x0)),                    \
  152.          "rI" ((USItype)(y0))                    \
  153.        : "cc", "g1", "g2");                        \
  154.     __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2));            \
  155.     r3 = _t1; r2 = _t2;                            \
  156.   } while (0)
  157.  
  158. #define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0)
  159.  
  160. #define __FP_FRAC_DEC_4(x3,x2,x1,x0,y3,y2,y1,y0) __FP_FRAC_SUB_4(x3,x2,x1,x0,x3,x2,x1,x0,y3,y2,y1,y0)
  161.  
  162. #define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i)                    \
  163.   __asm__ ("addcc %3,%4,%3\n\t"                        \
  164.        "addxcc %2,%%g0,%2\n\t"                    \
  165.        "addxcc %1,%%g0,%1\n\t"                    \
  166.        "addx %0,%%g0,%0\n\t"                    \
  167.        : "=&r" ((USItype)(x3)),                    \
  168.          "=&r" ((USItype)(x2)),                    \
  169.          "=&r" ((USItype)(x1)),                    \
  170.          "=&r" ((USItype)(x0))                    \
  171.        : "rI" ((USItype)(i)),                    \
  172.          "0" ((USItype)(x3)),                    \
  173.          "1" ((USItype)(x2)),                    \
  174.          "2" ((USItype)(x1)),                    \
  175.          "3" ((USItype)(x0))                    \
  176.        : "cc")
  177.  
  178. #ifndef CONFIG_SMP
  179. extern struct task_struct *last_task_used_math;
  180. #endif
  181.  
  182. /* Obtain the current rounding mode. */
  183. #ifndef FP_ROUNDMODE
  184. #ifdef CONFIG_SMP
  185. #define FP_ROUNDMODE    ((current->thread.fsr >> 30) & 0x3)
  186. #else
  187. #define FP_ROUNDMODE    ((last_task_used_math->thread.fsr >> 30) & 0x3)
  188. #endif
  189. #endif
  190.  
  191. /* Exception flags. */
  192. #define FP_EX_INVALID        (1 << 4)
  193. #define FP_EX_OVERFLOW        (1 << 3)
  194. #define FP_EX_UNDERFLOW        (1 << 2)
  195. #define FP_EX_DIVZERO        (1 << 1)
  196. #define FP_EX_INEXACT        (1 << 0)
  197.  
  198. #define FP_HANDLE_EXCEPTIONS return _fex
  199.  
  200. #ifdef CONFIG_SMP
  201. #define FP_INHIBIT_RESULTS ((current->thread.fsr >> 23) & _fex)
  202. #else
  203. #define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex)
  204. #endif
  205.  
  206. #endif
  207.