Ratrob

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Fetch Engine

Branch Predictor I/F

  • BPredRecoveryType OUTPUT
BoolType miss (1 bits)
BoolType taken (1 bits)
AddrType target_PC (32 bits)
AddrType addrs (32 bits)
BPredStateType state (9 bits)
  • Status Flag OUTPUT
BoolType rr_empty (1 bits)

Crack I/F

  • Constants: Cluster IDs
const ClusterIdType CLUSTER_AUNIT 2'b00
const ClusterIdType CLUSTER_AUNIT 2'b01
const ClusterIdType CLUSTER_AUNIT 2'b10
const ClusterIdType CLUSTER_AUNIT 2'b11
  • LRegType
! Range of Register
0..31 integer logical register
32..63 FP logical register
64..74 special use registers






Special Use Registers Definitions
const LRegType LOG_ZERO 7'b0000000;
const LRegType LOG_CEXC 7'd64;
const LRegType LOG_ PSR 7'd65;
const LRegType LOG_ WIM 7'd66;
const LRegType LOG_ CWP 7'd67;
const LRegType LOG_ TBR 7'd68;
const LRegType LOG_ Y 7'd69;
const LRegType LOG_ FSR 7'd70;
const LRegType LOG_ ICC 7'd71;
const LRegType LOG_ FCC 7'd672;
const LRegType LOG_ PC 7'd73;
const LRegType LOG_ TMP 7'd74;
  • DInst_CRType

INPUT

BoolType valid (1 bits)
BoolType slow (1 bits)
‘’’OPType ‘’’ op 10 bits)
‘’’IMMType ‘’’ imm (32 bits)
BoolType expop (1 bits)
BoolType cexc (1 bits)
BoolType aexc_clear (1 bits)
BoolType icc (1 bits)
BoolType useY (1 bits)
BPredStateType state (9 bits)
ClusterIdType ‘’’ id (3 bits)
LRegType ldest (7 bits)
LRegType lsrc1 (7 bits)
LRegType lsrc2 (7 bits)
  • Status Flag

INPUT

BoolType sched_busy (1 bits)
BoolType rr_clear (1 bits)