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more changes to the decoder ... Now does special 3 table

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arch/mips/isa_desc/bitfields.h:
    Change from table names to actual bitfield name ...

--HG--
extra : convert_revision : ead69065eb9c3e9c4ea4f67587a6fb07091898ed
This commit is contained in:
Korey Sewell
2006-01-25 17:36:38 -05:00
parent 14fc0996e3
commit 4be1f418bc
2 changed files with 43 additions and 23 deletions
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23
arch/mips/isa_desc/bitfields.h
View File

@@ -7,14 +7,25 @@
def bitfield OPCODE_HI <31:29>;
def bitfield OPCODE_LO <28:26>;
def bitfield SPECIAL_HI < 5: 3>;
def bitfield SPECIAL_HI < 2: 0>;
def bitfield FUNCTION_HI < 5: 3>;
def bitfield FUNCTION_LO < 2: 0>;
def bitfield REGIMM_HI <20:19>;
def bitfield REGIMM_LO <18:16>;
def bitfield RT <20:16>;
def bitfield RT_HI <20:19>;
def bitfield RT_LO <18:16>;
def bitfield RS <25:21>;
def bitfield RT <20:16>;
def bitfield RS <25:21>;
def bitfield RS_HI <25:24>;
def bitfield RS_LO <23:21>;
def bitfield MOVCI <>;
def bitfield SRL <>;
def bitfield SRLV <>;
def bitfield SA <>;
def bitfield BSHFL <>;
def bitfield BSHFL_HI <>;
def bitfield BSHFL_LO <>;
// Integer operate format(s>;
def bitfield INTIMM <15: 0>; // integer immediate (literal)

43
arch/mips/isa_desc/decoder.h
View File

@@ -14,8 +14,8 @@ decode OPCODE_HI default FailUnimpl::unknown() {
// Derived From ... Table A-2 MIPS32 ISA Manual
0x0: decode OPCODE_LO default FailUnimpl::reserved(){
0x0: decode SPECIAL_HI {
0x0: decode SPECIAL_LO {
0x0: decode FUNCTION_HI {
0x0: decode FUNCTION_LO {
0x1: decode MOVCI {
format Move {
0: movc({{ }});
@@ -46,7 +46,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
}
0x1: decode SPECIAL_LO {
0x1: decode FUNCTION_LO {
//Table A-3 Note: "Specific encodings of the hint field are used
//to distinguish JR from JR.HB and JALR from JALR.HB"
@@ -65,7 +65,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x7: Synchronize::synch({{ }});
}
0x2: decode SPECIAL_LO {
0x2: decode FUNCTION_LO {
format MultDiv {
0x0: mfhi({{ }});
0x1: mthi({{ }});
@@ -74,7 +74,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
};
0x3: decode SPECIAL_LO {
0x3: decode FUNCTION_LO {
format MultDiv {
0x0: mult({{ }});
0x1: multu({{ }});
@@ -83,7 +83,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
};
0x4: decode SPECIAL_LO {
0x4: decode FUNCTION_LO {
format Arithmetic {
0x0: add({{ }});
0x1: addu({{ }});
@@ -99,14 +99,14 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
}
0x5: decode SPECIAL_LO {
0x5: decode FUNCTION_LO {
format SetInstructions{
0x2: slt({{ }});
0x3: sltu({{ }});
}
};
0x6: decode SPECIAL_LO {
0x6: decode FUNCTION_LO {
format Trap {
0x0: tge({{ }});
0x1: tgeu({{ }});
@@ -218,7 +218,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x6: reserved_inst_exception({{ }})
};
4: decode SPECIAL2 {
0x4: decode FUNCTION_HI {
0x0:;
0x1:;
0x2:;
@@ -228,14 +228,23 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x6:;
}
7: decode SPECIAL3 {
0x0:;
0x1:;
0x2:;
0x3:;
0x4:;
0x5:;
0x6:;
0x7: decode FUNCTION_HI {
//Table A-6 MIPS32 SPECIAL31 Encoding of Function Field for Release 2 of the Architecture
0x0: decode FUNCTION_LO {
0x1: ext({{ }});
0x4: ins({{ }});
}
0x4: decode SA {
//Table A-10 MIPS32 BSHFL Encoding of sa Field
0x02: wsbh({{ }});
0x10: seb({{ }});
0x18: seh({{ }});
}
0x6: decode FUNCTION_LO {
0x7: rdhwr({{ }});
}
}
};