arch/sparc64/math-emu/fcmpq.c

   1 /* $Id: fcmpq.c,v 1.5 1999/05/28 13:43:33 jj Exp $
   2  * arch/sparc64/math-emu/fcmpq.c
   3  *
   4  * Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
   5  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
   6  *
   7  */
   8
   9 #include "sfp-util.h"
  10 #include "soft-fp.h"
  11 #include "quad.h"
  12
  13 int FCMPQ(void *rd, void *rs2, void *rs1)
  14 {
  15         FP_DECL_EX;
  16         FP_DECL_Q(A); FP_DECL_Q(B);
  17         long ret;
  18         long fccno = (long)rd;
  19         unsigned long fsr;
  20
  21         FP_UNPACK_RAW_QP(A, rs1);
  22         FP_UNPACK_RAW_QP(B, rs2);
  23         FP_CMP_Q(ret, B, A, 3);
  24         if (ret == 3 && (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B)))
  25                 FP_SET_EXCEPTION(FP_EX_INVALID);
  26         if (!FP_INHIBIT_RESULTS) {
  27                 rd = (void *)(((long)rd)&~3);
  28                 if (ret == -1) ret = 2;
  29                 fsr = current->tss.xfsr[0];
  30                 switch (fccno) {
  31                 case 0: fsr &= ~0xc00; fsr |= (ret << 10); break;
  32                 case 1: fsr &= ~0x300000000UL; fsr |= (ret << 32); break;
  33                 case 2: fsr &= ~0xc00000000UL; fsr |= (ret << 34); break;
  34                 case 3: fsr &= ~0x3000000000UL; fsr |= (ret << 36); break;
  35                 }
  36                 current->tss.xfsr[0] = fsr;
  37         }
  38         FP_HANDLE_EXCEPTIONS;
  39 }