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Copy pathriscv_instr_cover_group.sv
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riscv_instr_cover_group.sv
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/*
* Copyright 2019 Google LLC
*
* Licensed 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.
*/
`ifndef COMPLIANCE_MODE
`define DV(TEXT) TEXT
`else
`define DV(TEXT)
`endif
`define SAMPLE(cg, val) \
if (cg != null) cg.sample(val);
// sample with type cast
`define SAMPLE_W_TYPE(cg, val, typ = riscv_instr) \
if (cg != null) begin \
typ t; \
`DV_CHECK_FATAL($cast(t, val), $sformatf("Cannot cast %0s to %0s", `"val`", `"typ`"), \
"riscv_instr_cover_group") \
cg.sample(t); \
end
`define SAMPLE_F(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_floating_point_instr)
`define SAMPLE_B(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_b_instr)
`define SAMPLE_ZBA(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_zba_instr)
`define SAMPLE_ZBB(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_zbb_instr)
`define SAMPLE_ZBC(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_zbc_instr)
`define SAMPLE_ZBS(cg, val) `SAMPLE_W_TYPE(cg, val, riscv_zbs_instr)
`define INSTR_CG_BEGIN(INSTR_NAME, INSTR_CLASS = riscv_instr) \
covergroup ``INSTR_NAME``_cg with function sample(INSTR_CLASS instr);
`define R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
cp_rs1_sign : coverpoint instr.rs1_sign; \
cp_rs2_sign : coverpoint instr.rs2_sign; \
cp_rd_sign : coverpoint instr.rd_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define CMP_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
cp_rs1_sign : coverpoint instr.rs1_sign; \
cp_result : coverpoint instr.rd_value[0]; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define SB_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rs1_sign : coverpoint instr.rs1_sign; \
cp_rs2_sign : coverpoint instr.rs2_sign; \
cp_imm_sign : coverpoint instr.imm_sign; \
cp_branch_hit : coverpoint instr.branch_hit; \
cp_sign_cross : cross cp_rs1_sign, cp_rs2_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
}) \
`define STORE_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1 { \
`DV(ignore_bins zero = {ZERO};) \
} \
cp_rs2 : coverpoint instr.rs2; \
cp_imm_sign : coverpoint instr.imm_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
}) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
}) \
`define LOAD_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1 { \
`DV(ignore_bins zero = {ZERO};) \
} \
cp_rd : coverpoint instr.rd; \
cp_imm_sign : coverpoint instr.imm_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
}) \
`define I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
cp_rs1_sign : coverpoint instr.rs1_sign; \
cp_rd_sign : coverpoint instr.rd_sign; \
cp_imm_sign : coverpoint instr.imm_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define U_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd; \
cp_rd_sign : coverpoint instr.rd_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define J_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_imm_sign : coverpoint instr.imm_sign; \
cp_rd : coverpoint instr.rd; \
cp_rd_align : coverpoint instr.rd_value[1];
`define CSR_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define CR_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
cp_rs2_sign : coverpoint instr.rs2_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define CI_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd; \
cp_imm_sign : coverpoint instr.imm_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
})
`define CI_INSTR_NON_ZERO_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd { \
ignore_bins non_zero = {ZERO}; \
} \
cp_imm_sign : coverpoint instr.imm_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
})
`define CSS_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs2 : coverpoint instr.rs2; \
cp_imm_sign : coverpoint instr.imm_sign; \
cp_rs2_sign : coverpoint instr.rs2_sign; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
})
`define CIW_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
})
`define CL_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
cp_rd : coverpoint instr.rd { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
})
`define CL_SP_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
}
`define CS_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
cp_rs2 : coverpoint instr.rs2 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
}) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
})
`define CS_SP_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs2 : coverpoint instr.rs2 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
}
`define CA_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rd : coverpoint instr.rd { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
cp_rs2 : coverpoint instr.rs2 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define CB_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_rs1 : coverpoint instr.rs1 { \
bins gpr[] = {S0, S1, A0, A1, A2, A3, A4, A5}; \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
})
`define CJ_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME) \
cp_imm_sign : coverpoint instr.imm_sign;
// single/double precision floating point special values coverpoint
`define FP_SPECIAL_VALUES_CP(VAR, NAME, PRECISION = S) \
cp_sfp_special_values_on_``NAME`` : coverpoint VAR[31:0] { \
option.weight = (`"PRECISION`" == "S"); \
type_option.weight = (`"PRECISION`" == "S"); \
bins infinity[] = {32'h7f80_0000, 32'hff80_0000}; \
bins largest[] = {32'h7f7f_ffff, 32'hff7f_ffff}; \
bins zeros[] = {32'h0000_0000, 32'h8000_0000}; \
bins NaN[] = {32'h7f80_0001, 32'h7fc0_0000}; \
} \
cp_sfp_subnormal_on_``NAME`` : coverpoint VAR[30:SINGLE_PRECISION_FRACTION_BITS] == 0 { \
option.weight = (`"PRECISION`" == "S"); \
type_option.weight = (`"PRECISION`" == "S"); \
} \
cp_dfp_special_values_on_``NAME`` : coverpoint VAR { \
option.weight = (`"PRECISION`" == "D"); \
type_option.weight = (`"PRECISION`" == "D"); \
bins infinity[] = {64'h7ff0_0000_0000_0000, 64'hfff0_0000_0000_0000}; \
bins largest[] = {64'h7fef_ffff_ffff_ffff, 64'hffef_ffff_ffff_ffff}; \
bins zeros[] = {64'h0000_0000_0000_0000, 64'h8000_0000_0000_0000}; \
bins NaN[] = {64'h7ff0_0000_0000_0001, 64'h7ff8_0000_0000_0000}; \
} \
cp_dfp_subnormal_on_``NAME`` : coverpoint VAR[62:DOUBLE_PRECISION_FRACTION_BITS-1] == 0 { \
option.weight = (`"PRECISION`" == "D"); \
type_option.weight = (`"PRECISION`" == "D"); \
}
`define FP_LOAD_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_rs1 : coverpoint instr.rs1 { \
`DV(ignore_bins zero = {ZERO};) \
} \
cp_fd : coverpoint instr.fd; \
cp_imm_sign : coverpoint instr.imm_sign; \
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
})
`define FP_STORE_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_rs1 : coverpoint instr.rs1 { \
`DV(ignore_bins zero = {ZERO};) \
} \
cp_fs2 : coverpoint instr.fs2; \
cp_imm_sign : coverpoint instr.imm_sign; \
`FP_SPECIAL_VALUES_CP(instr.fs2_value, fs2_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard { \
bins valid_hazard[] = {NO_HAZARD, RAW_HAZARD}; \
}) \
`DV(cp_lsu_hazard : coverpoint instr.lsu_hazard { \
bins valid_hazard[] = {NO_HAZARD, WAR_HAZARD, WAW_HAZARD}; \
})
`define FP_R_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_fs2 : coverpoint instr.fs2; \
cp_fd : coverpoint instr.fd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_fs2_sign : coverpoint instr.fs2_sign; \
cp_fd_sign : coverpoint instr.fd_sign; \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fs2_value, fs2_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define FP_R4_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_fs2 : coverpoint instr.fs2; \
cp_fs3 : coverpoint instr.fs3; \
cp_fd : coverpoint instr.fd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_fs2_sign : coverpoint instr.fs2_sign; \
cp_fs3_sign : coverpoint instr.fs3_sign; \
cp_fd_sign : coverpoint instr.fd_sign; \
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign, cp_fs3_sign, cp_fd_sign; \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fs2_value, fs2_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fs3_value, fs3_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define FSQRT_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_fd : coverpoint instr.fd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_fd_sign : coverpoint instr.fd_sign; \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
// FCVT integer to floating
`define FP_I2F_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S, SIGN_TYP = SIGN) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_fd : coverpoint instr.fd; \
cp_rs1_sign : coverpoint instr.rs1_sign { \
option.weight = (`"SIGN_TYP`" == "SIGN"); \
type_option.weight = (`"SIGN_TYP`" == "SIGN"); \
} \
cp_fd_sign : coverpoint instr.fd_sign { \
option.weight = (`"SIGN_TYP`" == "SIGN"); \
type_option.weight = (`"SIGN_TYP`" == "SIGN"); \
} \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
// FCVT floating to integer
`define FP_F2I_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S, SIGN_TYP = SIGN) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_rd : coverpoint instr.rd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_rd_sign : coverpoint instr.rd_sign { \
option.weight = (`"SIGN_TYP`" == "SIGN"); \
type_option.weight = (`"SIGN_TYP`" == "SIGN"); \
} \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
// floating compare instructions
`define FP_CMP_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_fs2 : coverpoint instr.fs2; \
cp_rd : coverpoint instr.rd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_fs2_sign : coverpoint instr.fs2_sign; \
`CP_VALUE_RANGE(compare_result, instr.rd_value, 0, 1) \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`FP_SPECIAL_VALUES_CP(instr.fs2_value, fs2_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define FCLASS_INSTR_CG_BEGIN(INSTR_NAME, PRECISION = S) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_floating_point_instr) \
cp_fs1 : coverpoint instr.fs1; \
cp_rd : coverpoint instr.rd; \
cp_fs1_sign : coverpoint instr.fs1_sign; \
cp_rd_value : coverpoint instr.rd_value { \
bins values[] = {0, 'b1, 'b10, 'b100, 'b1000, 'b1_0000, 'b10_0000, \
'b100_0000, 'b1000_0000, 'b1_0000_0000, 'b10_0000_0000}; \
illegal_bins others = default; \
} \
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, PRECISION) \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define ZBA_I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zba_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define ZBA_R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zba_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define ZBB_I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbb_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define ZBB_R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbb_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define ZBC_I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbc_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define ZBC_R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbc_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define ZBS_I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbs_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define ZBS_R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_zbs_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define B_I_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_b_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`define B_R_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_b_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define B_R_INSTR_NO_RS2_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_b_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
`define B_R4_INSTR_CG_BEGIN(INSTR_NAME) \
`INSTR_CG_BEGIN(INSTR_NAME, riscv_b_instr) \
cp_rs1 : coverpoint instr.rs1; \
cp_rs2 : coverpoint instr.rs2; \
cp_rs3 : coverpoint instr.rs3; \
cp_rd : coverpoint instr.rd; \
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;) \
// only enable the coverpoint for a particular XLEN (32, 64, 128)
`define ENABLE_CP_BY_XLEN(XLEN_VAL) \
option.weight = (XLEN == XLEN_VAL); \
type_option.weight = (XLEN == XLEN_VAL); \
`define CP_VALUE_RANGE(NAME, VAL, START, END) \
cp_``NAME``: coverpoint VAL{ \
bins values[] = {[START:END]}; \
}
`define CG_END endgroup
`define CG_SELECTOR_BEGIN(CG_ISA) \
if ((CG_ISA inside {supported_isa}) && (!select_isa || (cov_isa == CG_ISA))) begin
`define CG_SELECTOR_END \
end
class riscv_instr_cover_group;
riscv_instr_gen_config cfg;
riscv_instr pre_instr;
riscv_instr_name_t instr_list[$];
int unsigned instr_cnt;
int unsigned branch_instr_cnt;
bit [4:0] branch_hit_history; // The last 5 branch result
exception_cause_t ignored_exceptions[];
exception_cause_t exception_list[$];
// Mode of the coverage model
// In complicance mode, all the micro-architecture related covergroups are removed. Only the ones
// related to RISC-V specification compliance is sampled.
bit compliance_mode;
// By default the coverage model run with instruction trace from ISS simulation. When simulating
// with ISS, certain covergroups like debug/interrupt could not be hit as these are not simulated
// with ISS. You can turn off this mode by adding +iss_mode=0 if you use the instruction trace
// from RTL simulation.
bit iss_mode = 1'b1;
// Select an ISA extension to cover
bit select_isa;
riscv_instr_group_t cov_isa;
`VECTOR_INCLUDE("riscv_instr_cover_group_inc_cpu_declare.sv")
///////////// RV32I instruction functional coverage //////////////
// Arithmetic instructions
`R_INSTR_CG_BEGIN(add)
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign, cp_rd_sign;
`CG_END
`R_INSTR_CG_BEGIN(sub)
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign, cp_rd_sign;
`CG_END
`INSTR_CG_BEGIN(addi)
cp_rs1 : coverpoint instr.rs1;
cp_rd : coverpoint instr.rd {
ignore_bins non_zero = {ZERO}; // treated as nop
}
cp_rs1_sign : coverpoint instr.rs1_sign;
cp_rd_sign : coverpoint instr.rd_sign;
cp_imm_sign : coverpoint instr.imm_sign;
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
cp_sign_cross: cross cp_rs1_sign, cp_imm_sign, cp_rd_sign;
`CG_END
`U_INSTR_CG_BEGIN(lui)
`CG_END
`U_INSTR_CG_BEGIN(auipc)
`CG_END
// Shift instructions
`R_INSTR_CG_BEGIN(sra)
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`R_INSTR_CG_BEGIN(sll)
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`R_INSTR_CG_BEGIN(srl)
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`INSTR_CG_BEGIN(srai)
cp_rs1 : coverpoint instr.rs1;
cp_rd : coverpoint instr.rd;
cp_rs1_sign : coverpoint instr.rs1_sign;
cp_rd_sign : coverpoint instr.rd_sign;
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`CG_END
`INSTR_CG_BEGIN(slli)
cp_rs1 : coverpoint instr.rs1;
cp_rd : coverpoint instr.rd;
cp_rs1_sign : coverpoint instr.rs1_sign;
cp_rd_sign : coverpoint instr.rd_sign;
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`CG_END
`INSTR_CG_BEGIN(srli)
cp_rs1 : coverpoint instr.rs1;
cp_rd : coverpoint instr.rd;
cp_rs1_sign : coverpoint instr.rs1_sign;
cp_rd_sign : coverpoint instr.rd_sign;
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`CG_END
// Logical instructions
`R_INSTR_CG_BEGIN(xor)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`R_INSTR_CG_BEGIN(or)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`R_INSTR_CG_BEGIN(and)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`I_INSTR_CG_BEGIN(xori)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_imm_sign;
`CG_END
`I_INSTR_CG_BEGIN(ori)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_imm_sign;
`CG_END
`I_INSTR_CG_BEGIN(andi)
cp_logical : coverpoint instr.logical_similarity;
cp_sign_cross: cross cp_rs1_sign, cp_imm_sign;
`CG_END
// Compare instructions
`CMP_INSTR_CG_BEGIN(slt)
cp_rs2 : coverpoint instr.rs2;
cp_rs2_sign : coverpoint instr.rs2_sign;
cp_sign_cross : cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`CMP_INSTR_CG_BEGIN(sltu)
cp_rs2 : coverpoint instr.rs2;
cp_rs2_sign : coverpoint instr.rs2_sign;
cp_sign_cross : cross cp_rs1_sign, cp_rs2_sign;
`CG_END
`CMP_INSTR_CG_BEGIN(slti)
cp_imm_sign : coverpoint instr.imm_sign;
cp_sign_cross : cross cp_rs1_sign, cp_imm_sign;
`CG_END
`CMP_INSTR_CG_BEGIN(sltiu)
cp_imm_sign : coverpoint instr.imm_sign;
cp_sign_cross : cross cp_rs1_sign, cp_imm_sign;
`CG_END
// Branch instruction
`SB_INSTR_CG_BEGIN(beq)
`CG_END
`SB_INSTR_CG_BEGIN(bne)
`CG_END
`SB_INSTR_CG_BEGIN(blt)
`CG_END
`SB_INSTR_CG_BEGIN(bge)
`CG_END
`SB_INSTR_CG_BEGIN(bltu)
`CG_END
`SB_INSTR_CG_BEGIN(bgeu)
`CG_END
// Load instructions
`LOAD_INSTR_CG_BEGIN(lb)
`CG_END
`LOAD_INSTR_CG_BEGIN(lh)
cp_align: coverpoint instr.unaligned_mem_access;
`CG_END
`LOAD_INSTR_CG_BEGIN(lw)
cp_align: coverpoint instr.unaligned_mem_access;
`CG_END
`LOAD_INSTR_CG_BEGIN(lbu)
`CG_END
`LOAD_INSTR_CG_BEGIN(lhu)
cp_align: coverpoint instr.unaligned_mem_access;
`CG_END
// Store instruction
`STORE_INSTR_CG_BEGIN(sb)
`CG_END
`STORE_INSTR_CG_BEGIN(sh)
cp_misalign: coverpoint instr.unaligned_mem_access;
`CG_END
`STORE_INSTR_CG_BEGIN(sw)
cp_misalign: coverpoint instr.unaligned_mem_access;
`CG_END
// JUMP instruction
`J_INSTR_CG_BEGIN(jal)
cp_imm_align : coverpoint instr.imm[1];
`CG_END
`J_INSTR_CG_BEGIN(jalr)
cp_rs1_link : coverpoint instr.rs1 {
bins ra = {RA};
bins t1 = {T1};
bins non_link = default;
}
cp_rd_link : coverpoint instr.rd {
bins ra = {RA};
bins t1 = {T1};
bins non_link = default;
}
cp_imm_align : coverpoint instr.imm[1:0];
cp_rs1_align : coverpoint instr.rs1_value[1:0];
cp_align : cross cp_imm_align, cp_rs1_align;
cp_ras : cross cp_rs1_link, cp_rd_link;
`CG_END
// floating instructions
`FP_LOAD_INSTR_CG_BEGIN(flw)
`CG_END
`FP_LOAD_INSTR_CG_BEGIN(fld, D)
`CG_END
`FP_STORE_INSTR_CG_BEGIN(fsw)
`CG_END
`FP_STORE_INSTR_CG_BEGIN(fsd, D)
`CG_END
`FP_R_INSTR_CG_BEGIN(fadd_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign, cp_fd_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fadd_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign, cp_fd_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fsub_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign, cp_fd_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fsub_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign, cp_fd_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fmul_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fmul_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fdiv_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fdiv_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FSQRT_INSTR_CG_BEGIN(fsqrt_s)
`CG_END
`FSQRT_INSTR_CG_BEGIN(fsqrt_d, D)
`CG_END
`FP_R_INSTR_CG_BEGIN(fmin_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fmin_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fmax_s)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R_INSTR_CG_BEGIN(fmax_d, D)
cp_sign_cross: cross cp_fs1_sign, cp_fs2_sign;
`CG_END
`FP_R4_INSTR_CG_BEGIN(fmadd_s)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fmadd_d, D)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fnmadd_s)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fnmadd_d, D)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fmsub_s)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fmsub_d, D)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fnmsub_s)
`CG_END
`FP_R4_INSTR_CG_BEGIN(fnmsub_d, D)
`CG_END
// FCVT floating to floating
`INSTR_CG_BEGIN(fcvt_s_d, riscv_floating_point_instr)
cp_fs1 : coverpoint instr.fs1;
cp_fd : coverpoint instr.fd;
cp_fs1_sign : coverpoint instr.fs1_sign;
cp_fd_sign : coverpoint instr.fd_sign;
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, D)
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, S)
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`CG_END
`INSTR_CG_BEGIN(fcvt_d_s, riscv_floating_point_instr)
cp_fs1 : coverpoint instr.fs1;
cp_fd : coverpoint instr.fd;
cp_fs1_sign : coverpoint instr.fs1_sign;
cp_fd_sign : coverpoint instr.fd_sign;
`FP_SPECIAL_VALUES_CP(instr.fs1_value, fs1_value, S)
`FP_SPECIAL_VALUES_CP(instr.fd_value, fd_value, D)
`DV(cp_gpr_hazard : coverpoint instr.gpr_hazard;)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_w_s)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_wu_s, , UNSIGN)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_l_s)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_lu_s, UNSIGN)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_l_d, D)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_lu_d, D, UNSIGN)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_w_d, D)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fcvt_wu_d, D, UNSIGN)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_s_w)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_s_wu, , UNSIGN)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_s_l)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_d_l, D)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_s_lu, , UNSIGN)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_d_w, D)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_d_lu, D, UNSIGN)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fcvt_d_wu, D, UNSIGN)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnj_s)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnj_d, D)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnjn_s)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnjn_d, D)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnjx_s)
`CG_END
`FP_R_INSTR_CG_BEGIN(fsgnjx_d, D)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fmv_x_w)
`CG_END
`FP_F2I_INSTR_CG_BEGIN(fmv_x_d, D)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fmv_w_x)
`CG_END
`FP_I2F_INSTR_CG_BEGIN(fmv_d_x, D)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(feq_s)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(feq_d, D)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(flt_s)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(flt_d, D)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(fle_s)
`CG_END
`FP_CMP_INSTR_CG_BEGIN(fle_d, D)
`CG_END
`FCLASS_INSTR_CG_BEGIN(fclass_s)
`CG_END
`FCLASS_INSTR_CG_BEGIN(fclass_d, D)
`CG_END
// B extension instructions ratified in v.1.00 (Zba, Zbb, Zbc, Zbs).
`ZBA_R_INSTR_CG_BEGIN(sh1add)
`CG_END
`ZBA_R_INSTR_CG_BEGIN(sh2add)
`CG_END
`ZBA_R_INSTR_CG_BEGIN(sh3add)
`CG_END
`ZBA_R_INSTR_CG_BEGIN(sh1add_uw)
`CG_END
`ZBA_R_INSTR_CG_BEGIN(sh2add_uw)
`CG_END
`ZBA_R_INSTR_CG_BEGIN(sh3add_uw)
`CG_END
// Count Leading/Trailing Zeros (clz, ctz)
`ZBB_I_INSTR_CG_BEGIN(clz)
`CP_VALUE_RANGE(num_leading_zeros, instr.rd_value, 0, XLEN-1)
`CG_END
`ZBB_I_INSTR_CG_BEGIN(ctz)
`CP_VALUE_RANGE(num_trailing_zeros, instr.rd_value, 0, XLEN-1)
`CG_END
`ZBB_I_INSTR_CG_BEGIN(clzw)
`CP_VALUE_RANGE(num_leading_zeros, instr.rd_value, 0, XLEN-1)
`CG_END
`ZBB_I_INSTR_CG_BEGIN(ctzw)
`CP_VALUE_RANGE(num_trailing_zeros, instr.rd_value, 0, XLEN-1)
`CG_END
`ZBB_I_INSTR_CG_BEGIN(cpop)
`CP_VALUE_RANGE(num_set_bits, instr.rd_value, 0, XLEN-1)
`CG_END
`ZBB_I_INSTR_CG_BEGIN(cpopw)
`CP_VALUE_RANGE(num_set_bits, instr.rd_value, 0, XLEN-1)
`CG_END
// Logic-with-negate (andn, orn, xnor)
`ZBB_R_INSTR_CG_BEGIN(andn)
`CG_END
`ZBB_R_INSTR_CG_BEGIN(orn)
`CG_END
`ZBB_R_INSTR_CG_BEGIN(xnor)
`CG_END
// Or-combine
`ZBB_R_INSTR_CG_BEGIN(orc_b)
`CP_VALUE_RANGE(or_combine_mode, instr.imm, 0, XLEN-1)
`CG_END
// Min/max instructions (min, max, minu, maxu)
`ZBB_R_INSTR_CG_BEGIN(min)
cp_rs1_gt_rs2 : coverpoint (longint'(instr.rs1_value) > longint'(instr.rs2_value));
cp_rs1_eq_rs2 : coverpoint (instr.rs1_value == instr.rs2_value) {
bins equal = {1};
}
`CG_END
`ZBB_R_INSTR_CG_BEGIN(max)
cp_rs1_gt_rs2 : coverpoint (longint'(instr.rs1_value) > longint'(instr.rs2_value));
cp_rs1_eq_rs2 : coverpoint (instr.rs1_value == instr.rs2_value) {
bins equal = {1};
}
`CG_END
`ZBB_R_INSTR_CG_BEGIN(minu)
cp_rs1_gt_rs2 : coverpoint (instr.rs1_value > instr.rs2_value);
cp_rs1_eq_rs2 : coverpoint (instr.rs1_value == instr.rs2_value) {
bins equal = {1};
}
`CG_END
`ZBB_R_INSTR_CG_BEGIN(maxu)
cp_rs1_gt_rs2 : coverpoint (instr.rs1_value > instr.rs2_value);
cp_rs1_eq_rs2 : coverpoint (instr.rs1_value == instr.rs2_value) {
bins equal = {1};
}
`CG_END
// Sign-extend instructions (sext.b, sext.h)
`ZBB_I_INSTR_CG_BEGIN(sext_b)