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/*
Copyright (c) 2014 - 2016 The Regents of the University of
California (Regents). All Rights Reserved. Redistribution and use in
source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the following
two paragraphs of disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
two paragraphs of disclaimer in the documentation and/or other materials
provided with the distribution.
* Neither the name of the Regents nor the names of its contributors
may be used to endorse or promote products derived from this
software without specific prior written permission.
IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF
ANY, PROVIDED HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION
TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
MODIFICATIONS.
*/
package firrtlTests
import firrtl._
import firrtl.ir._
import firrtl.passes._
import firrtl.Mappers._
import Annotations._
class InferReadWriteSpec extends SimpleTransformSpec {
class InferReadWriteCheckException extends PassException(
"Readwrite ports are not found!")
object InferReadWriteCheckPass extends Pass {
val name = "Check Infer ReadWrite Ports"
def findReadWrite(s: Statement): Boolean = s match {
case s: DefMemory if s.readLatency > 0 && s.readwriters.size == 1 =>
s.name == "mem" && s.readwriters.head == "rw"
case s: Block =>
s.stmts exists findReadWrite
case _ => false
}
def run (c: Circuit) = {
val errors = new Errors
val foundReadWrite = c.modules exists {
case m: Module => findReadWrite(m.body)
case m: ExtModule => false
}
if (!foundReadWrite) {
errors append new InferReadWriteCheckException
errors.trigger
}
c
}
}
object InferReadWriteCheck extends Transform with SimpleRun {
def execute (c: Circuit, map: AnnotationMap) =
run(c, Seq(InferReadWriteCheckPass))
}
def transforms (writer: java.io.Writer) = Seq(
new Chisel3ToHighFirrtl(),
new IRToWorkingIR(),
new ResolveAndCheck(),
new HighFirrtlToMiddleFirrtl(),
new InferReadWrite(TransID(-1)),
InferReadWriteCheck,
new EmitFirrtl(writer)
)
"Infer ReadWrite Ports" should "infer readwrite ports for the same clock" in {
val input = """
circuit sram6t :
module sram6t :
input clk : Clock
input reset : UInt<1>
output io : {flip en : UInt<1>, flip wen : UInt<1>, flip waddr : UInt<8>, flip wdata : UInt<32>, flip raddr : UInt<8>, rdata : UInt<32>}
io is invalid
smem mem : UInt<32>[128]
node T_0 = eq(io.wen, UInt<1>("h00"))
node T_1 = and(io.en, T_0)
wire T_2 : UInt
T_2 is invalid
when T_1 :
T_2 <= io.raddr
read mport T_3 = mem[T_2], clk
io.rdata <= T_3
node T_4 = and(io.en, io.wen)
when T_4 :
write mport T_5 = mem[io.waddr], clk
T_5 <= io.wdata
""".stripMargin
val annotationMap = AnnotationMap(Seq(InferReadWriteAnnotation("sram6t", TransID(-1))))
val writer = new java.io.StringWriter
compile(parse(input), annotationMap, writer)
// Check correctness of firrtl
parse(writer.toString)
}
"Infer ReadWrite Ports" should "not infer readwrite ports for the difference clocks" in {
val input = """
circuit sram6t :
module sram6t :
input clk1 : Clock
input clk2 : Clock
input reset : UInt<1>
output io : {flip en : UInt<1>, flip wen : UInt<1>, flip waddr : UInt<8>, flip wdata : UInt<32>, flip raddr : UInt<8>, rdata : UInt<32>}
io is invalid
smem mem : UInt<32>[128]
node T_0 = eq(io.wen, UInt<1>("h00"))
node T_1 = and(io.en, T_0)
wire T_2 : UInt
T_2 is invalid
when T_1 :
T_2 <= io.raddr
read mport T_3 = mem[T_2], clk1
io.rdata <= T_3
node T_4 = and(io.en, io.wen)
when T_4 :
write mport T_5 = mem[io.waddr], clk2
T_5 <= io.wdata
""".stripMargin
val annotationMap = AnnotationMap(Seq(InferReadWriteAnnotation("sram6t", TransID(-1))))
val writer = new java.io.StringWriter
intercept[InferReadWriteCheckException] {
compile(parse(input), annotationMap, writer)
}
}
}
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