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Cause simplification

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This commit is contained in:
David Harris 2022-05-12 23:29:35 +00:00
parent 2a3f545e0c
commit 581d841653
1 changed files with 2 additions and 2 deletions
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pipelined/src/privileged/csr.sv
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@ -135,7 +135,7 @@ module csr #(parameter
if(`VECTORED_INTERRUPTS_SUPPORTED) begin:vec if(`VECTORED_INTERRUPTS_SUPPORTED) begin:vec
always_comb always_comb
if (PrivilegedTrapVector[1:0] == 2'b01 & CauseM[`XLEN-1] == 1) if (PrivilegedTrapVector[1:0] == 2'b01 & InterruptM)
PrivilegedVectoredTrapVector = {PrivilegedTrapVector[`XLEN-1:2] + CauseM[`XLEN-3:0], 2'b00}; PrivilegedVectoredTrapVector = {PrivilegedTrapVector[`XLEN-1:2] + CauseM[`XLEN-3:0], 2'b00};
else else
PrivilegedVectoredTrapVector = {PrivilegedTrapVector[`XLEN-1:2], 2'b00}; PrivilegedVectoredTrapVector = {PrivilegedTrapVector[`XLEN-1:2], 2'b00};
@ -178,7 +178,7 @@ module csr #(parameter
assign CSRAdrM = InstrM[31:20]; assign CSRAdrM = InstrM[31:20];
assign UnalignedNextEPCM = TrapM ? ((wfiM & InterruptM) ? PCM+4 : PCM) : CSRWriteValM; assign UnalignedNextEPCM = TrapM ? ((wfiM & InterruptM) ? PCM+4 : PCM) : CSRWriteValM;
assign NextEPCM = `C_SUPPORTED ? {UnalignedNextEPCM[`XLEN-1:1], 1'b0} : {UnalignedNextEPCM[`XLEN-1:2], 2'b00}; // 3.1.15 alignment assign NextEPCM = `C_SUPPORTED ? {UnalignedNextEPCM[`XLEN-1:1], 1'b0} : {UnalignedNextEPCM[`XLEN-1:2], 2'b00}; // 3.1.15 alignment
assign NextCauseM = TrapM ? CauseM : CSRWriteValM; assign NextCauseM = TrapM ? {InterruptM, CauseM[`XLEN-2:0]}: CSRWriteValM;
assign NextMtvalM = TrapM ? NextFaultMtvalM : CSRWriteValM; assign NextMtvalM = TrapM ? NextFaultMtvalM : CSRWriteValM;
assign CSRMWriteM = CSRWriteM & (PrivilegeModeW == `M_MODE); assign CSRMWriteM = CSRWriteM & (PrivilegeModeW == `M_MODE);
assign CSRSWriteM = CSRWriteM & (|PrivilegeModeW); assign CSRSWriteM = CSRWriteM & (|PrivilegeModeW);