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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/nwfpe/extended_cpdo.c
downloadconfigs-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/nwfpe/extended_cpdo.c')
-rw-r--r--arch/arm/nwfpe/extended_cpdo.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/arch/arm/nwfpe/extended_cpdo.c b/arch/arm/nwfpe/extended_cpdo.c
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index 00000000000..c39f68a3449
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+++ b/arch/arm/nwfpe/extended_cpdo.c
@@ -0,0 +1,154 @@
+/*
+ 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"
+
+floatx80 floatx80_exp(floatx80 Fm);
+floatx80 floatx80_ln(floatx80 Fm);
+floatx80 floatx80_sin(floatx80 rFm);
+floatx80 floatx80_cos(floatx80 rFm);
+floatx80 floatx80_arcsin(floatx80 rFm);
+floatx80 floatx80_arctan(floatx80 rFm);
+floatx80 floatx80_log(floatx80 rFm);
+floatx80 floatx80_tan(floatx80 rFm);
+floatx80 floatx80_arccos(floatx80 rFm);
+floatx80 floatx80_pow(floatx80 rFn, floatx80 rFm);
+floatx80 floatx80_pol(floatx80 rFn, floatx80 rFm);
+
+static floatx80 floatx80_rsf(floatx80 rFn, floatx80 rFm)
+{
+ return floatx80_sub(rFm, rFn);
+}
+
+static floatx80 floatx80_rdv(floatx80 rFn, floatx80 rFm)
+{
+ return floatx80_div(rFm, rFn);
+}
+
+static floatx80 (*const dyadic_extended[16])(floatx80 rFn, floatx80 rFm) = {
+ [ADF_CODE >> 20] = floatx80_add,
+ [MUF_CODE >> 20] = floatx80_mul,
+ [SUF_CODE >> 20] = floatx80_sub,
+ [RSF_CODE >> 20] = floatx80_rsf,
+ [DVF_CODE >> 20] = floatx80_div,
+ [RDF_CODE >> 20] = floatx80_rdv,
+ [RMF_CODE >> 20] = floatx80_rem,
+
+ /* strictly, these opcodes should not be implemented */
+ [FML_CODE >> 20] = floatx80_mul,
+ [FDV_CODE >> 20] = floatx80_div,
+ [FRD_CODE >> 20] = floatx80_rdv,
+};
+
+static floatx80 floatx80_mvf(floatx80 rFm)
+{
+ return rFm;
+}
+
+static floatx80 floatx80_mnf(floatx80 rFm)
+{
+ rFm.high ^= 0x8000;
+ return rFm;
+}
+
+static floatx80 floatx80_abs(floatx80 rFm)
+{
+ rFm.high &= 0x7fff;
+ return rFm;
+}
+
+static floatx80 (*const monadic_extended[16])(floatx80 rFm) = {
+ [MVF_CODE >> 20] = floatx80_mvf,
+ [MNF_CODE >> 20] = floatx80_mnf,
+ [ABS_CODE >> 20] = floatx80_abs,
+ [RND_CODE >> 20] = floatx80_round_to_int,
+ [URD_CODE >> 20] = floatx80_round_to_int,
+ [SQT_CODE >> 20] = floatx80_sqrt,
+ [NRM_CODE >> 20] = floatx80_mvf,
+};
+
+unsigned int ExtendedCPDO(const unsigned int opcode, FPREG * rFd)
+{
+ FPA11 *fpa11 = GET_FPA11();
+ floatx80 rFm;
+ unsigned int Fm, opc_mask_shift;
+
+ Fm = getFm(opcode);
+ if (CONSTANT_FM(opcode)) {
+ rFm = getExtendedConstant(Fm);
+ } else {
+ switch (fpa11->fType[Fm]) {
+ case typeSingle:
+ rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
+ break;
+
+ case typeDouble:
+ rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
+ break;
+
+ case typeExtended:
+ rFm = fpa11->fpreg[Fm].fExtended;
+ break;
+
+ default:
+ return 0;
+ }
+ }
+
+ opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20;
+ if (!MONADIC_INSTRUCTION(opcode)) {
+ unsigned int Fn = getFn(opcode);
+ floatx80 rFn;
+
+ switch (fpa11->fType[Fn]) {
+ case typeSingle:
+ rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
+ break;
+
+ case typeDouble:
+ rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
+ break;
+
+ case typeExtended:
+ rFn = fpa11->fpreg[Fn].fExtended;
+ break;
+
+ default:
+ return 0;
+ }
+
+ if (dyadic_extended[opc_mask_shift]) {
+ rFd->fExtended = dyadic_extended[opc_mask_shift](rFn, rFm);
+ } else {
+ return 0;
+ }
+ } else {
+ if (monadic_extended[opc_mask_shift]) {
+ rFd->fExtended = monadic_extended[opc_mask_shift](rFm);
+ } else {
+ return 0;
+ }
+ }
+
+ return 1;
+}