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fix(lsu): mem级读数据处理错误

This commit is contained in:
Liphen 2024-05-11 15:49:59 +08:00
parent b9f0def62e
commit e191004c0f
2 changed files with 17 additions and 6 deletions
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15
chisel/playground/src/pipeline/execute/fu/Lsu.scala
View File

@ -61,7 +61,7 @@ class Lsu extends Module {
)
}
val valid = io.info.valid && io.info.fusel === FuType.lsu && allow_to_go// && 无异常
val valid = io.info.valid && io.info.fusel === FuType.lsu && allow_to_go // && 无异常
val op = io.info.op
val is_load = valid && LSUOpType.isLoad(op)
val is_store = valid && LSUOpType.isStore(op)
@ -74,8 +74,11 @@ class Lsu extends Module {
val req_wmask = if (XLEN == 32) genWmask32(addr, size) else genWmask(addr, size)
val rdata = io.dataSram.rdata
val mem_op = Wire(FuOpType())
val mem_addr = Wire(UInt(XLEN.W))
val rdata64 = LookupTree(
addr(2, 0),
mem_addr(2, 0),
List(
"b000".U -> rdata(63, 0),
"b001".U -> rdata(63, 8),
@ -88,7 +91,7 @@ class Lsu extends Module {
)
)
val rdata32 = LookupTree(
addr(1, 0),
mem_addr(1, 0),
List(
"b00".U -> rdata(31, 0),
"b01".U -> rdata(31, 8),
@ -98,7 +101,7 @@ class Lsu extends Module {
)
val rdata_result = if (XLEN == 32) rdata32 else rdata64
val rdata_partial_result = LookupTree(
op,
mem_op,
List(
LSUOpType.lb -> SignedExtend(rdata_result(7, 0), XLEN),
LSUOpType.lh -> SignedExtend(rdata_result(15, 0), XLEN),
@ -126,5 +129,7 @@ class Lsu extends Module {
val result = Wire(UInt(XLEN.W))
result := Mux(partial_load, rdata_partial_result, rdata_result)
BoringUtils.addSource(result, "lsu_rdata")
BoringUtils.addSource(result, "mem_lsu_rdata")
BoringUtils.addSink(mem_op, "mem_lsu_op")
BoringUtils.addSink(mem_addr, "mem_lsu_addr")
}

8
chisel/playground/src/pipeline/memory/MemoryUnit.scala
View File

@ -16,7 +16,13 @@ class MemoryUnit extends Module {
})
val rdata = Wire(UInt(XLEN.W))
BoringUtils.addSink(rdata, "lsu_rdata")
val op = Wire(FuOpType())
val addr = Wire(UInt(XLEN.W))
op := io.memoryStage.data.info.op
addr := io.memoryStage.data.src_info.src1_data + io.memoryStage.data.info.imm
BoringUtils.addSink(rdata, "mem_lsu_rdata")
BoringUtils.addSource(op, "mem_lsu_op")
BoringUtils.addSource(addr, "mem_lsu_addr")
io.decodeUnit.wen := io.writeBackStage.data.info.reg_wen
io.decodeUnit.waddr := io.writeBackStage.data.info.reg_waddr