patch-2.3.7 linux/arch/arm/nwfpe/double_cpdo.c

• Lines: 294
• Date: Thu Jun 17 01:11:35 1999
• Orig file: v2.3.6/linux/arch/arm/nwfpe/double_cpdo.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.6/linux/arch/arm/nwfpe/double_cpdo.c linux/arch/arm/nwfpe/double_cpdo.c
@@ -0,0 +1,293 @@
+/*
+    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 "softfloat.h"
+#include "fpopcode.h"
+#include "fpa11.h"
+
+extern FPA11 *fpa11;
+
+float64 getDoubleConstant(unsigned int);
+
+float64 float64_exp(float64 Fm);
+float64 float64_ln(float64 Fm);
+float64 float64_sin(float64 rFm);
+float64 float64_cos(float64 rFm);
+float64 float64_arcsin(float64 rFm);
+float64 float64_arctan(float64 rFm);
+float64 float64_log(float64 rFm);
+float64 float64_tan(float64 rFm);
+float64 float64_arccos(float64 rFm);
+float64 float64_pow(float64 rFn,float64 rFm);
+float64 float64_pol(float64 rFn,float64 rFm);
+
+unsigned int DoubleCPDO(const unsigned int opcode)
+{
+   float64 rFm, rFn;
+   unsigned int Fd, Fm, Fn, nRc = 1;
+
+   //fp_printk("DoubleCPDO(0x%08x)\n",opcode);
+   
+   Fm = getFm(opcode);
+   if (CONSTANT_FM(opcode))
+   {
+     rFm = getDoubleConstant(Fm);
+   }
+   else
+   {  
+     switch (fpa11->fpreg[Fm].fType)
+     {
+        case typeSingle:
+          rFm = float32_to_float64(fpa11->fpreg[Fm].fValue.fSingle);
+        break;
+
+        case typeDouble:
+          rFm = fpa11->fpreg[Fm].fValue.fDouble;
+          break;
+
+        case typeExtended:
+            // !! patb
+	    //fp_printk("not implemented! why not?\n");
+            //!! ScottB
+            // should never get here, if extended involved
+            // then other operand should be promoted then
+            // ExtendedCPDO called.
+            break;
+
+        default: return 0;
+     }
+   }
+
+   if (!MONADIC_INSTRUCTION(opcode))
+   {
+      Fn = getFn(opcode);
+      switch (fpa11->fpreg[Fn].fType)
+      {
+        case typeSingle:
+          rFn = float32_to_float64(fpa11->fpreg[Fn].fValue.fSingle);
+        break;
+
+        case typeDouble:
+          rFn = fpa11->fpreg[Fn].fValue.fDouble;
+        break;
+        
+        default: return 0;
+      }
+   }
+
+   Fd = getFd(opcode);
+   /* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
+   switch (opcode & MASK_ARITHMETIC_OPCODE)
+   {
+      /* dyadic opcodes */
+      case ADF_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_add(rFn,rFm);
+      break;
+
+      case MUF_CODE:
+      case FML_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_mul(rFn,rFm);
+      break;
+
+   case SUF_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_sub(rFn,rFm);
+      break;
+
+      case RSF_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_sub(rFm,rFn);
+      break;
+
+      case DVF_CODE:
+      case FDV_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_div(rFn,rFm);
+      break;
+
+      case RDF_CODE:
+      case FRD_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_div(rFm,rFn);
+      break;
+
+#if 0
+      case POW_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_pow(rFn,rFm);
+      break;
+
+      case RPW_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_pow(rFm,rFn);
+      break;
+#endif
+
+      case RMF_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_rem(rFn,rFm);
+      break;
+
+#if 0
+      case POL_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_pol(rFn,rFm);
+      break;
+#endif
+
+      /* monadic opcodes */
+      case MVF_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = rFm;
+      break;
+
+      case MNF_CODE:
+      {
+         unsigned int *p = (unsigned int*)&rFm;
+         p[1] ^= 0x80000000;
+         fpa11->fpreg[Fd].fValue.fDouble = rFm;
+      }
+      break;
+
+      case ABS_CODE:
+      {
+         unsigned int *p = (unsigned int*)&rFm;
+         p[1] &= 0x7fffffff;
+         fpa11->fpreg[Fd].fValue.fDouble = rFm;
+      }
+      break;
+
+      case RND_CODE:
+      case URD_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = 
+             int32_to_float64(float64_to_int32(rFm));
+      break;
+
+      case SQT_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_sqrt(rFm);
+      break;
+
+#if 0
+      case LOG_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_log(rFm);
+      break;
+
+      case LGN_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_ln(rFm);
+      break;
+
+      case EXP_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_exp(rFm);
+      break;
+
+      case SIN_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_sin(rFm);
+      break;
+
+      case COS_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_cos(rFm);
+      break;
+
+      case TAN_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_tan(rFm);
+      break;
+
+      case ASN_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_arcsin(rFm);
+      break;
+
+      case ACS_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_arccos(rFm);
+      break;
+
+      case ATN_CODE:
+         fpa11->fpreg[Fd].fValue.fDouble = float64_arctan(rFm);
+      break;
+#endif
+
+      case NRM_CODE:
+      break;
+      
+      default:
+      {
+        nRc = 0;
+      }
+   }
+
+   if (0 != nRc) fpa11->fpreg[Fd].fType = typeDouble;
+   return nRc;
+}
+
+#if 0
+float64 float64_exp(float64 rFm)
+{
+  return rFm;
+//series
+}
+
+float64 float64_ln(float64 rFm)
+{
+  return rFm;
+//series
+}
+
+float64 float64_sin(float64 rFm)
+{
+  return rFm;
+//series
+}
+
+float64 float64_cos(float64 rFm)
+{
+   return rFm;
+   //series
+}
+
+#if 0
+float64 float64_arcsin(float64 rFm)
+{
+//series
+}
+
+float64 float64_arctan(float64 rFm)
+{
+  //series
+}
+#endif
+
+float64 float64_log(float64 rFm)
+{
+  return float64_div(float64_ln(rFm),getDoubleConstant(7));
+}
+
+float64 float64_tan(float64 rFm)
+{
+  return float64_div(float64_sin(rFm),float64_cos(rFm));
+}
+
+float64 float64_arccos(float64 rFm)
+{
+return rFm;
+   //return float64_sub(halfPi,float64_arcsin(rFm));
+}
+
+float64 float64_pow(float64 rFn,float64 rFm)
+{
+  return float64_exp(float64_mul(rFm,float64_ln(rFn))); 
+}
+
+float64 float64_pol(float64 rFn,float64 rFm)
+{
+  return float64_arctan(float64_div(rFn,rFm)); 
+}
+#endif