From a0cdf213ab534838d9757a59639c371e9d2c9809 Mon Sep 17 00:00:00 2001
From: Korey Sewell <ksewell@umich.edu>
Date: Wed, 15 Feb 2006 14:08:54 -0500
Subject: ...

arch/mips/isa/base.isa:
    restore base.isa

--HG--
extra : convert_revision : a551caae28f505b22bceae3297fc00b0fb6a0e23
---
 arch/mips/isa/base.isa | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 arch/mips/isa/base.isa

diff --git a/arch/mips/isa/base.isa b/arch/mips/isa/base.isa
new file mode 100644
index 000000000..b504f1906
--- /dev/null
+++ b/arch/mips/isa/base.isa
@@ -0,0 +1,82 @@
+////////////////////////////////////////////////////////////////////
+//
+// Base class for sparc instructions, and some support functions
+//
+
+output header {{
+        /**
+         * Base class for all SPARC static instructions.
+         */
+        class SparcStaticInst : public StaticInst<SPARCISA>
+        {
+        protected:
+
+                // Constructor.
+                SparcStaticInst(const char *mnem, MachInst _machInst, OpClass __opClass)
+                    : StaticInst<SPARCISA>(mnem, _machInst, __opClass)
+                {
+                }
+
+                std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+        };
+
+        bool passesCondition(struct {uint8_t c:1; uint8_t v:1; uint8_t z:1; uint8_t n:1} codes, uint8_t condition);
+}};
+
+output decoder {{
+
+        std::string SparcStaticInst::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+        {
+                std::stringstream ss;
+
+                ccprintf(ss, "%-10s ", mnemonic);
+
+                // just print the first two source regs... if there's
+                // a third one, it's a read-modify-write dest (Rc),
+                // e.g. for CMOVxx
+                if(_numSrcRegs > 0)
+                {
+                        printReg(ss, _srcRegIdx[0]);
+                }
+                if(_numSrcRegs > 1)
+                {
+                        ss << ",";
+                        printReg(ss, _srcRegIdx[1]);
+                }
+
+                // just print the first dest... if there's a second one,
+                // it's generally implicit
+                if(_numDestRegs > 0)
+                {
+                        if(_numSrcRegs > 0)
+                                ss << ",";
+                        printReg(ss, _destRegIdx[0]);
+                }
+
+                return ss.str();
+        }
+
+        bool passesCondition(struct {uint8_t c:1; uint8_t v:1; uint8_t z:1; uint8_t n:1} codes, uint8_t condition)
+        {
+                switch(condition)
+                {
+                        case 0b1000: return true;
+                        case 0b0000: return false;
+                        case 0b1001: return !codes.z;
+                        case 0b0001: return codes.z;
+                        case 0b1010: return !(codes.z | (codes.n ^ codes.v));
+                        case 0b0010: return codes.z | (codes.n ^ codes.v);
+                        case 0b1011: return !(codes.n ^ codes.v);
+                        case 0b0011: return (codes.n ^ codes.v);
+                        case 0b1100: return !(codes.c | codes.z);
+                        case 0b0100: return (codes.c | codes.z);
+                        case 0b1101: return !codes.c;
+                        case 0b0101: return codes.c;
+                        case 0b1110: return !codes.n;
+                        case 0b0110: return codes.n;
+                        case 0b1111: return !codes.v;
+                        case 0b0111: return codes.v;
+                }
+        }
+}};
+
-- 
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