Subversion Repositories ao486

<defines>
`define CMD_TEST        #AUTOGEN_NEXT_CMD

`define CMDEX_TEST_immediate        4'd0
`define CMDEX_TEST_modregrm         4'd1
`define CMDEX_TEST_modregrm_imm     4'd2
</defines>

<decode>
dec_ready_one_imm && { decoder[7:1], 1'b0 } == 8'hA8
`CMD_TEST
SET(dec_cmdex, `CMDEX_TEST_immediate);
IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
SET(consume_one_imm);
</decode>

<decode>
dec_ready_modregrm_one && { decoder[7:1], 1'b0 } == 8'h84
`CMD_TEST
SET(dec_cmdex, `CMDEX_TEST_modregrm);
IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
SET(consume_modregrm_one);
</decode>

<decode>
dec_ready_modregrm_imm && { decoder[7:1], 1'b0 } == 8'hF6 && { decoder[13:12], 1'b0 } == 3'd0
`CMD_TEST
SET(dec_cmdex, `CMDEX_TEST_modregrm_imm);
IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
SET(consume_modregrm_imm);
</decode>

<read>
IF(rd_cmd == `CMD_TEST && rd_cmdex == `CMDEX_TEST_modregrm);
    
    SET(rd_src_is_reg);
    SET(rd_req_eflags);
    
    // dst: reg, src: reg
    IF(rd_modregrm_mod == 2'b11);
        
        // reg, reg
        SET(rd_dst_is_rm);
    
        IF(rd_mutex_busy_modregrm_reg || rd_mutex_busy_modregrm_rm); SET(rd_waiting); ENDIF();
    ENDIF();

    // dst: memory, src: reg
    IF(rd_modregrm_mod != 2'b11);
        
        SET(rd_dst_is_memory);
    
        IF(rd_mutex_busy_memory || rd_mutex_busy_modregrm_reg); SET(rd_waiting);
        ELSE();
            SET(read_virtual);

            IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
        ENDIF();
    ENDIF();
ENDIF();
</read>

<read>
IF(rd_cmd == `CMD_TEST && rd_cmdex == `CMDEX_TEST_modregrm_imm);
    
    SET(rd_src_is_modregrm_imm);
    
    SET(rd_req_eflags);
    
    // dst: reg, src: imm
    IF(rd_modregrm_mod == 2'b11);
        
        // reg, reg
        SET(rd_dst_is_rm);
    
        IF(rd_mutex_busy_modregrm_rm); SET(rd_waiting); ENDIF();
    ENDIF();

    // dst: memory, src: imm
    IF(rd_modregrm_mod != 2'b11);
        
        SET(rd_dst_is_memory);
    
        IF(rd_mutex_busy_memory); SET(rd_waiting);
        ELSE();
            SET(read_virtual);

            IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
        ENDIF();
    ENDIF();
ENDIF();
</read>

<read>
IF(rd_cmd == `CMD_TEST && rd_cmdex == `CMDEX_TEST_immediate);
                
    SET(rd_src_is_imm);
    SET(rd_dst_is_eax);
            
    SET(rd_req_eflags);

    // dst: eAX, src: imm
    IF(rd_mutex_busy_eax); SET(rd_waiting); ENDIF();
ENDIF();
</read>

<execute>
IF(exe_cmd == `CMD_TEST);
    
    SET(exe_result, exe_arith_and);
    SET(exe_arith_index, (`ARITH_VALID | `ARITH_AND));
ENDIF();
</execute>

<write>
IF(wr_cmd == `CMD_TEST);
    SAVE(zflag, zflag_result);
    SAVE(sflag, sflag_result);
    SAVE(pflag, pflag_result);

    SAVE(aflag, aflag_arith);
    SAVE(cflag, cflag_arith);
    SAVE(oflag, oflag_arith);
ENDIF();  
</write>