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/*****************************************************************************
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.
*****************************************************************************/
/*****************************************************************************
mmxu.cpp -- MMX-Like Execution Unit.
Original Author: Martin Wang, Synopsys, Inc.
*****************************************************************************/
/*****************************************************************************
MODIFICATION LOG - modifiers, enter your name, affiliation, date and
changes you are making here.
Name, Affiliation, Date:
Description of Modification:
*****************************************************************************/
#include "systemc.h"
#include "mmxu.h"
#include "directive.h"
#ifdef __SUNPRO_CC
// Martin, fix the ios stuff!
#define ios std::ios_base
#endif
void mmxu::entry(){
int opcode_tmp = 0;
unsigned int dout_tmp = 0;
unsigned int dest_tmp = 0;
const char * opcode_encode;
unsigned int mmxa_tmp = 0;
unsigned int mmxb_tmp = 0;
unsigned int mmxa0_tmp = 0;
unsigned int mmxa1_tmp = 0;
unsigned int mmxa2_tmp = 0;
unsigned int mmxa3_tmp = 0;
unsigned int mmxb0_tmp = 0;
unsigned int mmxb1_tmp = 0;
unsigned int mmxb2_tmp = 0;
unsigned int mmxb3_tmp = 0;
unsigned int mmxc0_tmp = 0;
unsigned int mmxc1_tmp = 0;
unsigned int mmxc2_tmp = 0;
unsigned int mmxc3_tmp = 0;
unsigned int mmxcU_tmp = 0;
unsigned int mmxcL_tmp = 0;
//
// main loop
//
//
// initialization of output
wait(3);
while(1) {
if (mmx_valid.read() == true) {
mmxa_tmp = mmxa.read();
mmxb_tmp = mmxb.read();
mmxa0_tmp = (mmxa_tmp & 0x000000ff) ;
mmxb0_tmp = (mmxb_tmp & 0x000000ff) ;
mmxa1_tmp = (mmxa_tmp & 0x0000ff00) >> 8 ;
mmxb1_tmp = (mmxb_tmp & 0x0000ff00) >> 8 ;
mmxa2_tmp = (mmxa_tmp & 0x00ff0000) >> 16 ;
mmxb2_tmp = (mmxb_tmp & 0x00ff0000) >> 16 ;
mmxa3_tmp = (mmxa_tmp & 0xff000000) >> 24 ;
mmxb3_tmp = (mmxb_tmp & 0xff000000) >> 24 ;
opcode_tmp = opcode.read();
dest_tmp = dest.read();
// output MUX
switch (opcode_tmp) {
case 0: // Stall
opcode_encode = "STALL";
// dout_tmp = dout_tmp; // keeps its value
wait();
break;
case 3: // add
opcode_encode = "PADD";
mmxc3_tmp = mmxa3_tmp + mmxb3_tmp;
mmxc2_tmp = mmxa2_tmp + mmxb2_tmp;
mmxc1_tmp = mmxa1_tmp + mmxb1_tmp;
mmxc0_tmp = mmxa0_tmp + mmxb0_tmp;
mmxc3_tmp = (mmxc3_tmp << 24) & 0xff000000;
mmxc2_tmp = (mmxc2_tmp << 16) & 0x00ff0000;
mmxc1_tmp = (mmxc1_tmp << 8) & 0x0000ff00;
dout_tmp = mmxc0_tmp | mmxc1_tmp | mmxc2_tmp | mmxc3_tmp;
wait();
break;
case 4: // add with saturation
opcode_encode = "PADDS";
mmxc3_tmp = mmxa3_tmp + mmxb3_tmp;
mmxc2_tmp = mmxa2_tmp + mmxb2_tmp;
mmxc1_tmp = mmxa1_tmp + mmxb1_tmp;
mmxc0_tmp = mmxa0_tmp + mmxb0_tmp;
if (mmxc3_tmp >= 256) mmxc3_tmp = 0xff;
if (mmxc2_tmp >= 256) mmxc2_tmp = 0xff;
if (mmxc1_tmp >= 256) mmxc1_tmp = 0xff;
if (mmxc0_tmp >= 256) mmxc0_tmp = 0xff;
mmxc3_tmp = (mmxc3_tmp << 24) & 0xff000000;
mmxc2_tmp = (mmxc2_tmp << 16) & 0x00ff0000;
mmxc1_tmp = (mmxc1_tmp << 8) & 0x0000ff00;
dout_tmp = mmxc0_tmp | mmxc1_tmp | mmxc2_tmp | mmxc3_tmp;
wait();
break;
case 5: // sub
opcode_encode = "PSUB";
mmxc3_tmp = mmxa3_tmp - mmxb3_tmp;
mmxc2_tmp = mmxa2_tmp - mmxb2_tmp;
mmxc1_tmp = mmxa1_tmp - mmxb1_tmp;
mmxc0_tmp = mmxa0_tmp - mmxb0_tmp;
mmxc3_tmp = (mmxc3_tmp << 24) & 0xff000000;
mmxc2_tmp = (mmxc2_tmp << 16) & 0x00ff0000;
mmxc1_tmp = (mmxc1_tmp << 8) & 0x0000ff00;
dout_tmp = mmxc0_tmp | mmxc1_tmp | mmxc2_tmp | mmxc3_tmp;
wait();
break;
case 6: // sub with saturation
opcode_encode = "PSUBS";
mmxc3_tmp = mmxa3_tmp - mmxb3_tmp;
mmxc2_tmp = mmxa2_tmp - mmxb2_tmp;
mmxc1_tmp = mmxa1_tmp - mmxb1_tmp;
mmxc0_tmp = mmxa0_tmp - mmxb0_tmp;
if (mmxb3_tmp > mmxa3_tmp) mmxc3_tmp = 0x00;
if (mmxb2_tmp > mmxa2_tmp) mmxc2_tmp = 0x00;
if (mmxb1_tmp > mmxa1_tmp) mmxc1_tmp = 0x00;
if (mmxb0_tmp > mmxa0_tmp) mmxc0_tmp = 0x00;
mmxc3_tmp = (mmxc3_tmp << 24) & 0xff000000;
mmxc2_tmp = (mmxc2_tmp << 16) & 0x00ff0000;
mmxc1_tmp = (mmxc1_tmp << 8) & 0x0000ff00;
dout_tmp = mmxc0_tmp | mmxc1_tmp | mmxc2_tmp | mmxc3_tmp;
wait();
break;
case 7: // packed multiply add with saturation
// a3*b3+a2*b2 , a1*b1+a0*b0
opcode_encode = "PMADD";
mmxc3_tmp = mmxa3_tmp * mmxb3_tmp;
mmxc2_tmp = mmxa2_tmp * mmxb2_tmp;
mmxc1_tmp = mmxa1_tmp * mmxb1_tmp;
mmxc0_tmp = mmxa0_tmp * mmxb0_tmp;
if (mmxc3_tmp >= 256) mmxc3_tmp = 0xff;
if (mmxc2_tmp >= 256) mmxc2_tmp = 0xff;
if (mmxc1_tmp >= 256) mmxc1_tmp = 0xff;
if (mmxc0_tmp >= 256) mmxc0_tmp = 0xff;
mmxcU_tmp = mmxc3_tmp + mmxc2_tmp;
mmxcL_tmp = mmxc1_tmp + mmxc0_tmp;
if (mmxcU_tmp >= 256) mmxcU_tmp = 0xff;
if (mmxcL_tmp >= 256) mmxcL_tmp = 0xff;
mmxcU_tmp = (mmxcU_tmp << 16) ;
dout_tmp = mmxcU_tmp | mmxcL_tmp;
wait();
break;
case 8: // packed b1 (16bit) b0(16bit) and a1(16 bit) a0(16 bit)
// to B1(8bit) B0(8bit) A1(8bit) A0(8bit)
opcode_encode = "PACK";
mmxc3_tmp = mmxb2_tmp << 24;
mmxc2_tmp = mmxb0_tmp << 16;
mmxc1_tmp = mmxa2_tmp << 8;
mmxc0_tmp = mmxa0_tmp ;
dout_tmp = mmxc3_tmp | mmxc2_tmp | mmxc1_tmp | mmxc0_tmp;
wait();
break;
case 9: // mmx chroma keying
// A =green != green green !=green
// B =green green green green
//Res=0xff 00 ff 00
opcode_encode = "MMXCK";
if (mmxa3_tmp == mmxb3_tmp)
mmxc3_tmp = 0xff;
else
mmxc3_tmp = 0x00;
if (mmxa2_tmp == mmxb2_tmp)
mmxc2_tmp = 0xff;
else
mmxc2_tmp = 0x00;
if (mmxa1_tmp == mmxb1_tmp)
mmxc1_tmp = 0xff;
else
mmxc1_tmp = 0x00;
if (mmxa0_tmp == mmxb0_tmp)
mmxc0_tmp = 0xff;
else
mmxc0_tmp = 0x00;
mmxc3_tmp = mmxc3_tmp << 24;
mmxc2_tmp = mmxc2_tmp << 16;
mmxc1_tmp = mmxc1_tmp << 8;
// mmxc0_tmp = mmxc0_tmp ; // keeps its value
dout_tmp = mmxc3_tmp | mmxc2_tmp | mmxc1_tmp | mmxc0_tmp;
wait();
break;
default:
opcode_encode = "INVALID";
printf("MMX: Bad Opcode %d.\n",opcode_tmp);
wait();
break;
}
mmxdout.write(dout_tmp);
mmxout_valid.write(true);
mmxdestout.write(dest_tmp);
printf("\t\t\t\t\t\t\t-------------------------------\n");
cout.setf(ios::hex,ios::basefield);
cout << "\t\t\t\t\t\t\tMMX :" << " op= " << opcode_encode
<< " A=0x " << mmxa_tmp << " B=0x " << mmxb_tmp << endl;
cout << "\t\t\t\t\t\t\tMMX :" << " C=0x " << dout_tmp << "-> R" << dest_tmp ;
cout.setf(ios::dec,ios::basefield);
cout << " at CSIM " << sc_time_stamp() << endl;
printf("\t\t\t\t\t\t\t-------------------------------\n");
wait();
mmxout_valid.write(false);
wait();
} else {
wait();
}
}
}
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