ARM: Decode VFP instructions.

src/arch/arm/isa/armdecode.isa

@@ -396,73 +396,9 @@ format DataOp {
     0x7: decode OPCODE_24 {
         0: decode OPCODE_4 {
             0: decode CPNUM {
-                format FloatOp {
+                0xa, 0xb: decode OPCODE_23_20 {
-                    0x1: decode OPCODE_23_20 {
+##include "vfpdecode.isa"
-                            0x0: decode OPCODE_15 {
+                }
-                                0: adf({{ Fd.sf = Fn.sf + Fm.sf; }});
-                                1: mvf({{ Fd.sf = Fm.sf; }});
-                            }
-                            0x1: decode OPCODE_15 {
-                                0: muf({{ Fd.sf = Fn.sf * Fm.sf; }});
-                                1: mnf({{ Fd.sf = -Fm.sf; }});
-                            }
-                            0x2: decode OPCODE_15 {
-                                0: suf({{ Fd.sf = Fn.sf - Fm.sf; }});
-                                1: abs({{ Fd.sf = fabs(Fm.sf); }});
-                            }
-                            0x3: decode OPCODE_15 {
-                                0: rsf({{ Fd.sf = Fm.sf - Fn.sf; }});
-                                1: rnd({{ Fd.sf = rint(Fm.sf); }});
-                            }
-                            0x4: decode OPCODE_15 {
-                                0: dvf({{ Fd.sf = Fn.sf / Fm.sf; }});
-                                1: sqt({{ Fd.sf = sqrt(Fm.sf); }});
-                            }
-                            0x5: decode OPCODE_15 {
-                                0: rdf({{ Fd.sf = Fm.sf / Fn.sf; }});
-                                1: log({{ Fd.sf = log10(Fm.sf); }});
-                            }
-                            0x6: decode OPCODE_15 {
-                                0: pow({{ Fd.sf = pow(Fm.sf, Fn.sf); }});
-                                1: lgn({{ Fd.sf = log(Fm.sf); }});
-                            }
-                            0x7: decode OPCODE_15 {
-                                0: rpw({{ Fd.sf = pow(Fn.sf, Fm.sf); }});
-                                1: exp({{ Fd.sf = exp(Fm.sf); }});
-                            }
-                            0x8: decode OPCODE_15 {
-                                0: rmf({{ Fd.sf = drem(Fn.sf, Fm.sf); }});
-                                1: sin({{ Fd.sf = sin(Fm.sf); }});
-                            }
-                            0x9: decode OPCODE_15 {
-                                0: fml({{ Fd.sf = Fn.sf * Fm.sf; }});
-                                1: cos({{ Fd.sf = cos(Fm.sf); }});
-                            }
-                            0xa: decode OPCODE_15 {
-                                0: fdv({{ Fd.sf = Fn.sf / Fm.sf; }});
-                                1: tan({{ Fd.sf = tan(Fm.sf); }});
-                            }
-                            0xb: decode OPCODE_15 {
-                                0: frd({{ Fd.sf = Fm.sf / Fn.sf; }});
-                                1: asn({{ Fd.sf = asin(Fm.sf); }});
-                            }
-                            0xc: decode OPCODE_15 {
-                                0: pol({{ Fd.sf = atan2(Fn.sf, Fm.sf); }});
-                                1: acs({{ Fd.sf = acos(Fm.sf); }});
-                            }
-                            0xd: decode OPCODE_15 {
-                                1: atn({{ Fd.sf = atan(Fm.sf); }});
-                            }
-                            0xe: decode OPCODE_15 {
-                                // Unnormalised Round
-                                1: FailUnimpl::urd();
-                            }
-                            0xf: decode OPCODE_15 {
-                                // Normalise
-                                1: FailUnimpl::nrm();
-                            }
-                    } // OPCODE_23_20
-                } // format FloatOp
             } // CPNUM
             1: decode CPNUM { // 27-24=1110,4 ==1
                 1: decode OPCODE_15_12 {

src/arch/arm/isa/bitfields.isa

@@ -51,18 +51,20 @@ def bitfield OPCODE        opcode;
 def bitfield MEDIA_OPCODE  mediaOpcode;
 def bitfield MEDIA_OPCODE2 mediaOpcode2;
 def bitfield USEIMM        useImm;
-def bitfield OPCODE_24	   opcode24;
+def bitfield OPCODE_24     opcode24;
 def bitfield OPCODE_23_20  opcode23_20;
 def bitfield OPCODE_23_21  opcode23_21;
 def bitfield OPCODE_22     opcode22;
-def bitfield OPCODE_20	   opcode20;
+def bitfield OPCODE_20     opcode20;
-def bitfield OPCODE_19	   opcode19;
+def bitfield OPCODE_19_16  opcode19_16;
-def bitfield OPCODE_18	   opcode18;
+def bitfield OPCODE_19     opcode19;
+def bitfield OPCODE_18     opcode18;
 def bitfield OPCODE_15_12  opcode15_12;
-def bitfield OPCODE_15	   opcode15;
+def bitfield OPCODE_15     opcode15;
 def bitfield MISC_OPCODE   miscOpcode;
 def bitfield OPC2          opc2; 
 def bitfield OPCODE_7      opcode7;
+def bitfield OPCODE_6      opcode6;
 def bitfield OPCODE_4      opcode4;
 
 def bitfield IS_MISC       isMisc;
@@ -100,16 +102,16 @@ def bitfield IMMED_LO_3_0  immedLo3_0;
 
 def bitfield IMMED_23_0    immed23_0;
 
-def bitfield CPNUM	   cpNum;
+def bitfield CPNUM         cpNum;
 // Note that FP Regs are only 3 bits
-def bitfield FN		   fn;
+def bitfield FN            fn;
-def bitfield FD		   fd;
+def bitfield FD            fd;
-def bitfield FPREGIMM	   fpRegImm;
+def bitfield FPREGIMM      fpRegImm;
 // We can just use 3:0 for FM since the hard-wired FP regs are handled in
 // float_regfile.hh
-def bitfield FM		   fm;
+def bitfield FM            fm;
-def bitfield FPIMM	   fpImm;
+def bitfield FPIMM         fpImm;
-def bitfield PUNWL	   punwl;
+def bitfield PUNWL         punwl;
 
 // M5 instructions
 def bitfield M5FUNC        m5Func;

src/arch/arm/isa/vfpdecode.isa

@@ -0,0 +1,83 @@
+// -*- mode:c++ -*-
+
+// Copyright (c) 2010 ARM Limited
+// All rights reserved
+//
+// The license below extends only to copyright in the software and shall
+// not be construed as granting a license to any other intellectual
+// property including but not limited to intellectual property relating
+// to a hardware implementation of the functionality of the software
+// licensed hereunder.  You may use the software subject to the license
+// terms below provided that you ensure that this notice is replicated
+// unmodified and in its entirety in all distributions of the software,
+// modified or unmodified, in source code or in binary form.
+//
+// Copyright (c) 2009 The Regents of The University of Michigan
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met: redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer;
+// redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution;
+// neither the name of the copyright holders nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Authors: Gabe Black
+
+
+// There needs to be a decode statement in the file that includes this since
+// the isa_parser can't handle a case and what it corresponds with spanning
+// lines. it should decode bits 23 through 20.
+
+format FloatOp {
+    0x0, 0x4: WarnUnimpl::vmla(); // vmls
+    0x1, 0x5: WarnUnimpl::vnmla(); // vnmls, vnmul
+    0x2, 0x6: decode OPCODE_6 {
+        0x0: WarnUnimpl::vmul();
+        0x1: WarnUnimpl::vnmla(); // vnmls, vnmul
+    }
+    0x3, 0x7: decode OPCODE_6 {
+        0x0: WarnUnimpl::vadd();
+        0x1: WarnUnimpl::vsub();
+    }
+    0x8, 0xc: WarnUnimpl::vdiv();
+    0xb, 0xf: decode OPCODE_6 {
+        0x0: WarnUnimpl::vmov(); // immediate
+        0x1: decode OPCODE_19_16 {
+            0x0: decode OPCODE_7 {
+                0x0: WarnUnimpl::vmov(); // register
+                0x1: WarnUnimpl::vabs();
+            }
+            0x1: decode OPCODE_7 {
+                0x0: WarnUnimpl::vneg();
+                0x1: WarnUnimpl::vsqrt();
+            }
+            0x2, 0x3: WarnUnimpl::vcvtb(); // vcvtt
+            0x4, 0x5: WarnUnimpl::vcmp(); // vcmpe double to single
+            0x7: decode OPCODE_7 {
+                0x0: WarnUnimpl::vcvt(); // double and single
+            }
+            0x8: WarnUnimpl::vcvt(); // vcvtr fp and int
+            0xa, 0xb: WarnUnimpl::vcvt(); // fp and fixed point
+            0xc, 0xd: WarnUnimpl::vcvt(); // vcvtr fp and int
+            0xe, 0xf: WarnUnimpl::vcvt(); // fp and fixed point
+        }
+    }
+}
+

src/arch/arm/types.hh

@@ -71,6 +71,7 @@ namespace ArmISA
         Bitfield<23, 21> opcode23_21;
         Bitfield<20>     opcode20;
         Bitfield<22>     opcode22;
+        Bitfield<19, 16> opcode19_16;
         Bitfield<19>     opcode19;
         Bitfield<18>     opcode18;
         Bitfield<15, 12> opcode15_12;
@@ -78,6 +79,7 @@ namespace ArmISA
         Bitfield<7,  4>  miscOpcode;
         Bitfield<7,5>    opc2;
         Bitfield<7>      opcode7;
+        Bitfield<6>      opcode6;
         Bitfield<4>      opcode4;
 
         Bitfield<31, 28> condCode;