| /***************************************************************************** |
| |
| Licensed to Accellera Systems Initiative Inc. (Accellera) under one or |
| more contributor license agreements. See the NOTICE file distributed |
| with this work for additional information regarding copyright ownership. |
| Accellera licenses this file to you under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with the |
| License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| implied. See the License for the specific language governing |
| permissions and limitations under the License. |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| a2901_alu.cpp -- |
| |
| Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| MODIFICATION LOG - modifiers, enter your name, affiliation, date and |
| changes you are making here. |
| |
| Name, Affiliation, Date: |
| Description of Modification: |
| |
| *****************************************************************************/ |
| |
| #include "a2901_alu.h" |
| |
| void |
| a2901_alu::entry() |
| { |
| int I53 = I.read().range(5,3); |
| |
| R_ext_v = (I53 == 0x1) ? sc_int<5> (0xf & ~(RE.read())) |
| : sc_int<5>( RE.read() ); |
| S_ext_v = (I53 == 0x2) ? sc_int<5> (0xf & ~(S.read()) ) |
| : sc_int<5>( S.read() ); |
| R_ext.write(R_ext_v); |
| S_ext.write(S_ext_v); |
| |
| switch (I53) { |
| case 0x0: |
| case 0x1: |
| case 0x2: |
| result = R_ext_v + S_ext_v + C0.read(); |
| break; |
| case 0x3: |
| result = R_ext_v | S_ext_v; |
| break; |
| case 0x4: |
| result = R_ext_v & S_ext_v; |
| break; |
| case 0x5: |
| result = ~(R_ext_v) & S_ext_v; |
| break; |
| case 0x6: |
| result = R_ext_v ^ S_ext_v; |
| break; |
| default: |
| result = ~(R_ext_v ^ S_ext_v); |
| } |
| |
| F.write(result); |
| OVR.write(!(R_ext_v[3] ^ S_ext_v[3]) & (R_ext_v[3] ^ result[3])); |
| //C4.write(result[4]); |
| C4.write((bool)result[4]); |
| temp_p = R_ext_v | S_ext_v; |
| temp_g = R_ext_v & S_ext_v; |
| Pbar.write((temp_p[0] & temp_p[1] & temp_p[2] & temp_p[3]) ? 0 : 1); |
| Gbar.write((temp_g[3] | |
| (temp_p[3] & temp_g[2]) | |
| (temp_p[3] & temp_p[2] & temp_g[1]) | |
| (temp_p[3] & temp_p[2] & temp_p[1] & temp_g[0])) ? 0 : 1); |
| //F3.write(result[3]); |
| F3.write((bool)result[3]); |
| F30.write((result[3] | result[2] | result[1] | result[0]) ? 0 : 1); |
| } |