OPENCORES.ORG

From: cvs at opencores.org<cvs@o...>
Date: Mon Jan 28 01:27:12 CET 2008
Subject: [cvs-checkins] MODIFIED: mlite ...

Date: 00/08/01 28:01:27

Modified: mlite/vhdl control.vhd Log: Removed unsupported branch likely opcodes Revision Changes Path 1.17 mlite/vhdl/control.vhd http://www.opencores.org/cvsweb.shtml/mlite/vhdl/control.vhd.diff?r1=1.16&r2=1.17 (In the diff below, changes in quantity of whitespace are not shown.) Index: control.vhd =================================================================== RCS file: /cvsroot/rhoads/mlite/vhdl/control.vhd,v retrieving revision 1.16 retrieving revision 1.17 diff -u -b -r1.16 -r1.17 --- control.vhd 14 Feb 2007 18:56:49 -0000 1.16 +++ control.vhd 28 Jan 2008 00:27:12 -0000 1.17 @@ -121,11 +121,8 @@ alu_function := ALU_ADD; branch_function := BRANCH_YES; - when "001010" => --MOVZ if(!r[rt]) r[rd]=r[rs]; /*IV*/ --- c_source := C_FROM_REG_SOURCE_EQZ; - - when "001011" => --MOVN if(r[rt]) r[rd]=r[rs]; /*IV*/ --- c_source := FROM_REG_SOURCE_NEZ; + --when "001010" => --MOVZ if(!r[rt]) r[rd]=r[rs]; /*IV*/ + --when "001011" => --MOVN if(r[rt]) r[rd]=r[rs]; /*IV*/ when "001100" => --SYSCALL is_syscall := '1'; @@ -133,7 +130,8 @@ when "001101" => --BREAK s->wakeup=1; is_syscall := '1'; - when "001111" => --SYNC s->wakeup=1; + --when "001111" => --SYNC s->wakeup=1; + when "010000" => --MFHI r[rd]=s->hi; c_source := C_FROM_MULT; mult_function := MULT_READ_HI; @@ -204,11 +202,11 @@ c_source := C_FROM_ALU; alu_function := ALU_ADD; - when "110001" => --TGEU - when "110010" => --TLT - when "110011" => --TLTU - when "110100" => --TEQ - when "110110" => --TNE + --when "110001" => --TGEU + --when "110010" => --TLT + --when "110011" => --TLTU + --when "110100" => --TEQ + --when "110110" => --TNE when others => end case; @@ -237,23 +235,10 @@ when "00001" => --BGEZ branch=r[rs]>=0; branch_function := BRANCH_GEZ; - when "10010" => --BLTZALL r[31]=s->pc_next; lbranch=r[rs]<0; - c_source := C_FROM_PC_PLUS4; - pc_source := FROM_LBRANCH; - branch_function := BRANCH_LTZ; - - when "00010" => --BLTZL lbranch=r[rs]<0; - 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 "10010" => --BLTZALL r[31]=s->pc_next; lbranch=r[rs]<0; + --when "00010" => --BLTZL lbranch=r[rs]<0; + --when "10011" => --BGEZALL r[31]=s->pc_next; lbranch=r[rs]>=0; + --when "00011" => --BGEZL lbranch=r[rs]>=0; when others => end case; @@ -354,36 +339,13 @@ branch_function := BRANCH_NO; end if; - when "010001" => --COP1 - when "010010" => --COP2 - when "010011" => --COP3 - when "010100" => --BEQL 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_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 "010001" => --COP1 + --when "010010" => --COP2 + --when "010011" => --COP3 + --when "010100" => --BEQL lbranch=r[rs]==r[rt]; + --when "010101" => --BNEL lbranch=r[rs]!=r[rt]; + --when "010110" => --BLEZL lbranch=r[rs]<=0; + --when "010111" => --BGTZL lbranch=r[rs]>0; when "100000" => --LB r[rt]=*(signed char*)ptr; a_source := A_FROM_REG_SOURCE; @@ -433,7 +395,8 @@ c_source := C_FROM_MEMORY; 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]; a_source := A_FROM_REG_SOURCE; b_source := B_FROM_SIGNED_IMM; @@ -458,22 +421,22 @@ alu_function := ALU_ADD; mem_source := MEM_WRITE32; --address=(short)imm+r[rs]; - when "101110" => --SWR //Not Implemented - when "101111" => --CACHE - when "110000" => --LL r[rt]=*(long*)ptr; - when "110001" => --LWC1 - when "110010" => --LWC2 - when "110011" => --LWC3 - when "110101" => --LDC1 - when "110110" => --LDC2 - when "110111" => --LDC3 - when "111000" => --SC *(long*)ptr=r[rt]; r[rt]=1; - when "111001" => --SWC1 - when "111010" => --SWC2 - when "111011" => --SWC3 - when "111101" => --SDC1 - when "111110" => --SDC2 - when "111111" => --SDC3 + --when "101110" => --SWR //Not Implemented + --when "101111" => --CACHE + --when "110000" => --LL r[rt]=*(long*)ptr; + --when "110001" => --LWC1 + --when "110010" => --LWC2 + --when "110011" => --LWC3 + --when "110101" => --LDC1 + --when "110110" => --LDC2 + --when "110111" => --LDC3 + --when "111000" => --SC *(long*)ptr=r[rt]; r[rt]=1; + --when "111001" => --SWC1 + --when "111010" => --SWC2 + --when "111011" => --SWC3 + --when "111101" => --SDC1 + --when "111110" => --SDC2 + --when "111111" => --SDC3 when others => end case;