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Diffstat (limited to 'arch/arm26/nwfpe/single_cpdo.c')
-rw-r--r--arch/arm26/nwfpe/single_cpdo.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/arch/arm26/nwfpe/single_cpdo.c b/arch/arm26/nwfpe/single_cpdo.c
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index 00000000000..5cdcddbb899
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+++ b/arch/arm26/nwfpe/single_cpdo.c
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+/*
+ NetWinder Floating Point Emulator
+ (c) Rebel.COM, 1998,1999
+
+ Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
+
+ 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 "fpa11.h"
+#include "softfloat.h"
+#include "fpopcode.h"
+
+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)
+{
+ FPA11 *fpa11 = GET_FPA11();
+ float32 rFm, rFn = 0; //FIXME - should be zero?
+ unsigned int Fd, Fm, Fn, nRc = 1;
+
+ Fm = getFm(opcode);
+ if (CONSTANT_FM(opcode))
+ {
+ rFm = getSingleConstant(Fm);
+ }
+ else
+ {
+ switch (fpa11->fType[Fm])
+ {
+ case typeSingle:
+ rFm = fpa11->fpreg[Fm].fSingle;
+ break;
+
+ default: return 0;
+ }
+ }
+
+ if (!MONADIC_INSTRUCTION(opcode))
+ {
+ Fn = getFn(opcode);
+ switch (fpa11->fType[Fn])
+ {
+ case typeSingle:
+ rFn = fpa11->fpreg[Fn].fSingle;
+ break;
+
+ default: return 0;
+ }
+ }
+
+ Fd = getFd(opcode);
+ switch (opcode & MASK_ARITHMETIC_OPCODE)
+ {
+ /* dyadic opcodes */
+ case ADF_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_add(rFn,rFm);
+ break;
+
+ case MUF_CODE:
+ case FML_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_mul(rFn,rFm);
+ break;
+
+ case SUF_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_sub(rFn,rFm);
+ break;
+
+ case RSF_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_sub(rFm,rFn);
+ break;
+
+ case DVF_CODE:
+ case FDV_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_div(rFn,rFm);
+ break;
+
+ case RDF_CODE:
+ case FRD_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_div(rFm,rFn);
+ break;
+
+#if 0
+ case POW_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_pow(rFn,rFm);
+ break;
+
+ case RPW_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_pow(rFm,rFn);
+ break;
+#endif
+
+ case RMF_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_rem(rFn,rFm);
+ break;
+
+#if 0
+ case POL_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_pol(rFn,rFm);
+ break;
+#endif
+
+ /* monadic opcodes */
+ case MVF_CODE:
+ fpa11->fpreg[Fd].fSingle = rFm;
+ break;
+
+ case MNF_CODE:
+ rFm ^= 0x80000000;
+ fpa11->fpreg[Fd].fSingle = rFm;
+ break;
+
+ case ABS_CODE:
+ rFm &= 0x7fffffff;
+ fpa11->fpreg[Fd].fSingle = rFm;
+ break;
+
+ case RND_CODE:
+ case URD_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_round_to_int(rFm);
+ break;
+
+ case SQT_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_sqrt(rFm);
+ break;
+
+#if 0
+ case LOG_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_log(rFm);
+ break;
+
+ case LGN_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_ln(rFm);
+ break;
+
+ case EXP_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_exp(rFm);
+ break;
+
+ case SIN_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_sin(rFm);
+ break;
+
+ case COS_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_cos(rFm);
+ break;
+
+ case TAN_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_tan(rFm);
+ break;
+
+ case ASN_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_arcsin(rFm);
+ break;
+
+ case ACS_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_arccos(rFm);
+ break;
+
+ case ATN_CODE:
+ fpa11->fpreg[Fd].fSingle = float32_arctan(rFm);
+ break;
+#endif
+
+ case NRM_CODE:
+ break;
+
+ default:
+ {
+ nRc = 0;
+ }
+ }
+
+ if (0 != nRc) fpa11->fType[Fd] = 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