| Line 119... |
Line 119... |
c_source := C_FROM_PC_PLUS4;
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c_source := C_FROM_PC_PLUS4;
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pc_source := FROM_BRANCH;
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pc_source := FROM_BRANCH;
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alu_function := ALU_ADD;
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alu_function := ALU_ADD;
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branch_function := BRANCH_YES;
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branch_function := BRANCH_YES;
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|
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when "001010" => --MOVZ if(!r[rt]) r[rd]=r[rs]; /*IV*/
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--when "001010" => --MOVZ if(!r[rt]) r[rd]=r[rs]; /*IV*/
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-- c_source := C_FROM_REG_SOURCE_EQZ;
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--when "001011" => --MOVN if(r[rt]) r[rd]=r[rs]; /*IV*/
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|
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when "001011" => --MOVN if(r[rt]) r[rd]=r[rs]; /*IV*/
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-- c_source := FROM_REG_SOURCE_NEZ;
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|
|
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when "001100" => --SYSCALL
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when "001100" => --SYSCALL
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is_syscall := '1';
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is_syscall := '1';
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|
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when "001101" => --BREAK s->wakeup=1;
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when "001101" => --BREAK s->wakeup=1;
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is_syscall := '1';
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is_syscall := '1';
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|
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when "001111" => --SYNC s->wakeup=1;
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--when "001111" => --SYNC s->wakeup=1;
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|
|
when "010000" => --MFHI r[rd]=s->hi;
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when "010000" => --MFHI r[rd]=s->hi;
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c_source := C_FROM_MULT;
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c_source := C_FROM_MULT;
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mult_function := MULT_READ_HI;
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mult_function := MULT_READ_HI;
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|
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when "010001" => --FTHI s->hi=r[rs];
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when "010001" => --FTHI s->hi=r[rs];
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| Line 202... |
Line 200... |
|
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when "101101" => --DADDU r[rd]=r[rs]+u[rt];
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when "101101" => --DADDU r[rd]=r[rs]+u[rt];
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c_source := C_FROM_ALU;
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c_source := C_FROM_ALU;
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alu_function := ALU_ADD;
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alu_function := ALU_ADD;
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|
|
when "110001" => --TGEU
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--when "110001" => --TGEU
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when "110010" => --TLT
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--when "110010" => --TLT
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when "110011" => --TLTU
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--when "110011" => --TLTU
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when "110100" => --TEQ
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--when "110100" => --TEQ
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when "110110" => --TNE
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--when "110110" => --TNE
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when others =>
|
when others =>
|
end case;
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end case;
|
|
|
when "000001" => --REGIMM
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when "000001" => --REGIMM
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rt := "000000";
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rt := "000000";
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| Line 235... |
Line 233... |
branch_function := BRANCH_GEZ;
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branch_function := BRANCH_GEZ;
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|
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when "00001" => --BGEZ branch=r[rs]>=0;
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when "00001" => --BGEZ branch=r[rs]>=0;
|
branch_function := BRANCH_GEZ;
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branch_function := BRANCH_GEZ;
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|
|
when "10010" => --BLTZALL r[31]=s->pc_next; lbranch=r[rs]<0;
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--when "10010" => --BLTZALL r[31]=s->pc_next; lbranch=r[rs]<0;
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c_source := C_FROM_PC_PLUS4;
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--when "00010" => --BLTZL lbranch=r[rs]<0;
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pc_source := FROM_LBRANCH;
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--when "10011" => --BGEZALL r[31]=s->pc_next; lbranch=r[rs]>=0;
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branch_function := BRANCH_LTZ;
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--when "00011" => --BGEZL lbranch=r[rs]>=0;
|
|
|
when "00010" => --BLTZL lbranch=r[rs]<0;
|
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pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_LTZ;
|
|
|
|
when "10011" => --BGEZALL r[31]=s->pc_next; lbranch=r[rs]>=0;
|
|
c_source := C_FROM_PC_PLUS4;
|
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_GEZ;
|
|
|
|
when "00011" => --BGEZL lbranch=r[rs]>=0;
|
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_GEZ;
|
|
|
|
when others =>
|
when others =>
|
end case;
|
end case;
|
|
|
when "000011" => --JAL r[31]=s->pc_next; s->pc_next=(s->pc&0xf0000000)|target;
|
when "000011" => --JAL r[31]=s->pc_next; s->pc_next=(s->pc&0xf0000000)|target;
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| Line 352... |
Line 337... |
rd(5) := '1';
|
rd(5) := '1';
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pc_source := FROM_BRANCH; --delay possible interrupt
|
pc_source := FROM_BRANCH; --delay possible interrupt
|
branch_function := BRANCH_NO;
|
branch_function := BRANCH_NO;
|
end if;
|
end if;
|
|
|
when "010001" => --COP1
|
--when "010001" => --COP1
|
when "010010" => --COP2
|
--when "010010" => --COP2
|
when "010011" => --COP3
|
--when "010011" => --COP3
|
when "010100" => --BEQL lbranch=r[rs]==r[rt];
|
--when "010100" => --BEQL lbranch=r[rs]==r[rt];
|
a_source := A_FROM_PC;
|
--when "010101" => --BNEL lbranch=r[rs]!=r[rt];
|
b_source := B_FROM_IMMX4;
|
--when "010110" => --BLEZL lbranch=r[rs]<=0;
|
alu_function := ALU_ADD;
|
--when "010111" => --BGTZL lbranch=r[rs]>0;
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_EQ;
|
|
|
|
when "010101" => --BNEL lbranch=r[rs]!=r[rt];
|
|
a_source := A_FROM_PC;
|
|
b_source := B_FROM_IMMX4;
|
|
alu_function := ALU_ADD;
|
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_NE;
|
|
|
|
when "010110" => --BLEZL lbranch=r[rs]<=0;
|
|
a_source := A_FROM_PC;
|
|
b_source := B_FROM_IMMX4;
|
|
alu_function := ALU_ADD;
|
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_LEZ;
|
|
|
|
when "010111" => --BGTZL lbranch=r[rs]>0;
|
|
a_source := A_FROM_PC;
|
|
b_source := B_FROM_IMMX4;
|
|
alu_function := ALU_ADD;
|
|
pc_source := FROM_LBRANCH;
|
|
branch_function := BRANCH_GTZ;
|
|
|
|
when "100000" => --LB r[rt]=*(signed char*)ptr;
|
when "100000" => --LB r[rt]=*(signed char*)ptr;
|
a_source := A_FROM_REG_SOURCE;
|
a_source := A_FROM_REG_SOURCE;
|
b_source := B_FROM_SIGNED_IMM;
|
b_source := B_FROM_SIGNED_IMM;
|
alu_function := ALU_ADD;
|
alu_function := ALU_ADD;
|
| Line 431... |
Line 393... |
alu_function := ALU_ADD;
|
alu_function := ALU_ADD;
|
rd := rt;
|
rd := rt;
|
c_source := C_FROM_MEMORY;
|
c_source := C_FROM_MEMORY;
|
mem_source := MEM_READ16; --address=(short)imm+r[rs];
|
mem_source := MEM_READ16; --address=(short)imm+r[rs];
|
|
|
when "100110" => --LWR //Not Implemented
|
--when "100110" => --LWR //Not Implemented
|
|
|
when "101000" => --SB *(char*)ptr=(char)r[rt];
|
when "101000" => --SB *(char*)ptr=(char)r[rt];
|
a_source := A_FROM_REG_SOURCE;
|
a_source := A_FROM_REG_SOURCE;
|
b_source := B_FROM_SIGNED_IMM;
|
b_source := B_FROM_SIGNED_IMM;
|
alu_function := ALU_ADD;
|
alu_function := ALU_ADD;
|
mem_source := MEM_WRITE8; --address=(short)imm+r[rs];
|
mem_source := MEM_WRITE8; --address=(short)imm+r[rs];
|
| Line 456... |
Line 419... |
a_source := A_FROM_REG_SOURCE;
|
a_source := A_FROM_REG_SOURCE;
|
b_source := B_FROM_SIGNED_IMM;
|
b_source := B_FROM_SIGNED_IMM;
|
alu_function := ALU_ADD;
|
alu_function := ALU_ADD;
|
mem_source := MEM_WRITE32; --address=(short)imm+r[rs];
|
mem_source := MEM_WRITE32; --address=(short)imm+r[rs];
|
|
|
when "101110" => --SWR //Not Implemented
|
--when "101110" => --SWR //Not Implemented
|
when "101111" => --CACHE
|
--when "101111" => --CACHE
|
when "110000" => --LL r[rt]=*(long*)ptr;
|
--when "110000" => --LL r[rt]=*(long*)ptr;
|
when "110001" => --LWC1
|
--when "110001" => --LWC1
|
when "110010" => --LWC2
|
--when "110010" => --LWC2
|
when "110011" => --LWC3
|
--when "110011" => --LWC3
|
when "110101" => --LDC1
|
--when "110101" => --LDC1
|
when "110110" => --LDC2
|
--when "110110" => --LDC2
|
when "110111" => --LDC3
|
--when "110111" => --LDC3
|
when "111000" => --SC *(long*)ptr=r[rt]; r[rt]=1;
|
--when "111000" => --SC *(long*)ptr=r[rt]; r[rt]=1;
|
when "111001" => --SWC1
|
--when "111001" => --SWC1
|
when "111010" => --SWC2
|
--when "111010" => --SWC2
|
when "111011" => --SWC3
|
--when "111011" => --SWC3
|
when "111101" => --SDC1
|
--when "111101" => --SDC1
|
when "111110" => --SDC2
|
--when "111110" => --SDC2
|
when "111111" => --SDC3
|
--when "111111" => --SDC3
|
when others =>
|
when others =>
|
end case;
|
end case;
|
|
|
if c_source = C_FROM_NULL then
|
if c_source = C_FROM_NULL then
|
rd := "000000";
|
rd := "000000";
|
