patch-2.2.18 linux/arch/arm/nwfpe/single_cpdo.c

• Lines: 260
• Date: Fri Sep 15 23:28:37 2000
• Orig file: v2.2.17/arch/arm/nwfpe/single_cpdo.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/arm/nwfpe/single_cpdo.c linux/arch/arm/nwfpe/single_cpdo.c
@@ -0,0 +1,259 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Corel Computer Corporation, 1998
+
+    Direct questions, comments to Scott Bambrough <scottb@corelcomputer.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "config.h"
+#include "milieu.h"
+#include "softfloat.h"
+#include "fpopcode.h"
+#include "fpa11.h"
+
+float32 getSingleConstant(unsigned int);
+
+float32 float32_exp(float32 Fm);
+float32 float32_ln(float32 Fm);
+float32 float32_sin(float32 rFm);
+float32 float32_cos(float32 rFm);
+float32 float32_arcsin(float32 rFm);
+float32 float32_arctan(float32 rFm);
+float32 float32_log(float32 rFm);
+float32 float32_tan(float32 rFm);
+float32 float32_arccos(float32 rFm);
+float32 float32_pow(float32 rFn,float32 rFm);
+float32 float32_pol(float32 rFn,float32 rFm);
+
+unsigned int SingleCPDO(const unsigned int opcode)
+{
+   float32 rFm, rFn;
+   unsigned int Fd, Fm, Fn, nRc = 1;
+
+   Fm = getFm(opcode);
+   if (CONSTANT_FM(opcode))
+   {
+     rFm = getSingleConstant(Fm);
+   }
+   else
+   {  
+     switch (fpa11->fpreg[Fm].fType)
+     {
+        case typeSingle:
+          rFm = fpa11->fpreg[Fm].fValue.fSingle;
+        break;
+        
+        default: return 0;
+     }
+   }
+
+   if (!MONADIC_INSTRUCTION(opcode))
+   {
+      Fn = getFn(opcode);
+      switch (fpa11->fpreg[Fn].fType)
+      {
+        case typeSingle:
+          rFn = fpa11->fpreg[Fn].fValue.fSingle;
+        break;
+
+        default: return 0;
+      }
+   }
+
+   Fd = getFd(opcode);
+   switch (opcode & MASK_ARITHMETIC_OPCODE)
+   {
+      /* dyadic opcodes */
+      case ADF_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_add(rFn,rFm);
+      break;
+
+      case MUF_CODE:
+      case FML_CODE:
+        fpa11->fpreg[Fd].fValue.fSingle = float32_mul(rFn,rFm);
+      break;
+
+      case SUF_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_sub(rFn,rFm);
+      break;
+
+      case RSF_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_sub(rFm,rFn);
+      break;
+
+      case DVF_CODE:
+      case FDV_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_div(rFn,rFm);
+      break;
+
+      case RDF_CODE:
+      case FRD_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_div(rFm,rFn);
+      break;
+
+#if 0
+      case POW_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_pow(rFn,rFm);
+      break;
+
+      case RPW_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_pow(rFm,rFn);
+      break;
+#endif
+
+      case RMF_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_rem(rFn,rFm);
+      break;
+
+#if 0
+      case POL_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_pol(rFn,rFm);
+      break;
+#endif
+
+      /* monadic opcodes */
+      case MVF_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = rFm;
+      break;
+
+      case MNF_CODE:
+         rFm ^= 0x80000000;
+         fpa11->fpreg[Fd].fValue.fSingle = rFm;
+      break;
+
+      case ABS_CODE:
+         rFm &= 0x7fffffff;
+         fpa11->fpreg[Fd].fValue.fSingle = rFm;
+      break;
+
+      case RND_CODE:
+      case URD_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = 
+             int32_to_float32(float32_to_int32(rFm));
+      break;
+
+      case SQT_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_sqrt(rFm);
+      break;
+
+#if 0
+      case LOG_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_log(rFm);
+      break;
+
+      case LGN_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_ln(rFm);
+      break;
+
+      case EXP_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_exp(rFm);
+      break;
+
+      case SIN_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_sin(rFm);
+      break;
+
+      case COS_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_cos(rFm);
+      break;
+
+      case TAN_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_tan(rFm);
+      break;
+
+      case ASN_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_arcsin(rFm);
+      break;
+
+      case ACS_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_arccos(rFm);
+      break;
+
+      case ATN_CODE:
+         fpa11->fpreg[Fd].fValue.fSingle = float32_arctan(rFm);
+      break;
+#endif
+
+      case NRM_CODE:
+      break;
+      
+      default:
+      {
+        nRc = 0;
+      }
+   }
+
+   if (0 != nRc) fpa11->fpreg[Fd].fType = typeSingle;
+   return nRc;
+}
+
+#if 0
+float32 float32_exp(float32 Fm)
+{
+//series
+}
+
+float32 float32_ln(float32 Fm)
+{
+//series
+}
+
+float32 float32_sin(float32 rFm)
+{
+//series
+}
+
+float32 float32_cos(float32 rFm)
+{
+//series
+}
+
+float32 float32_arcsin(float32 rFm)
+{
+//series
+}
+
+float32 float32_arctan(float32 rFm)
+{
+  //series
+}
+
+float32 float32_arccos(float32 rFm)
+{
+   //return float32_sub(halfPi,float32_arcsin(rFm));
+}
+
+float32 float32_log(float32 rFm)
+{
+  return float32_div(float32_ln(rFm),getSingleConstant(7));
+}
+
+float32 float32_tan(float32 rFm)
+{
+  return float32_div(float32_sin(rFm),float32_cos(rFm));
+}
+
+float32 float32_pow(float32 rFn,float32 rFm)
+{
+  return float32_exp(float32_mul(rFm,float32_ln(rFn))); 
+}
+
+float32 float32_pol(float32 rFn,float32 rFm)
+{
+  return float32_arctan(float32_div(rFn,rFm)); 
+}
+#endif