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min/max mux optimize

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This commit is contained in:
Kevin Kim 2023-03-22 10:25:54 -07:00
parent 80a490888a
commit bc2bbc0529
2 changed files with 19 additions and 19 deletions
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24
src/ieu/bmu/bmuctrl.sv
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@ -84,11 +84,11 @@ module bmuctrl(
BMUControlsD = `BMUCTRLW'b111_01_000_1_1_0_1_1_0_1_0_0; // bclri
17'b0010011_0100101_001: if (`XLEN == 64 & `ZBS_SUPPORTED)
BMUControlsD = `BMUCTRLW'b111_01_000_1_1_0_1_1_0_1_0_0; // bclri (rv64)
17'b0010011_0100100_101: if (`ZBS_SUPPORTED & `ZBS_SUPPORTED)
17'b0010011_0100100_101: if (`ZBS_SUPPORTED)
BMUControlsD = `BMUCTRLW'b101_01_000_1_1_0_1_1_0_1_0_0; // bexti
17'b0010011_0100101_101: if (`XLEN == 64 & `ZBS_SUPPORTED)
BMUControlsD = `BMUCTRLW'b101_01_000_1_1_0_1_1_0_1_0_0; // bexti (rv64)
17'b0010011_0110100_001: if (`ZBS_SUPPORTED & `ZBS_SUPPORTED)
17'b0010011_0110100_001: if (`ZBS_SUPPORTED)
BMUControlsD = `BMUCTRLW'b100_01_000_1_1_0_1_0_0_1_0_0; // binvi
17'b0010011_0110101_001: if (`XLEN == 64 & `ZBS_SUPPORTED)
BMUControlsD = `BMUCTRLW'b100_01_000_1_1_0_1_0_0_1_0_0; // binvi (rv64)
@ -141,13 +141,13 @@ module bmuctrl(
BMUControlsD = `BMUCTRLW'b001_01_111_1_0_0_1_0_1_0_0_0; // ror
17'b0111011_0110000_101: if (`XLEN == 64 & `ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b001_00_111_1_0_1_1_0_1_0_0_0; // rorw
17'b0010011_0110000_101: if (`ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b001_00_111_1_1_0_1_0_1_0_0_0; // rori (rv32)
17'b0010011_0110001_101: if (`XLEN == 64 & `ZBB_SUPPORTED)
//17'b0010011_0110000_101: if (`ZBB_SUPPORTED)
// BMUControlsD = `BMUCTRLW'b001_00_111_1_1_0_1_0_1_0_0_0; // rori (rv32)
17'b0010011_011000?_101: if ((`XLEN == 64 | ~Funct7D[0]) & `ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b001_00_111_1_1_0_1_0_1_0_0_0; // rori (rv64)
17'b0011011_0110000_101: if (`XLEN == 64 & `ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b001_00_111_1_1_1_1_0_1_0_0_0; // roriw
17'b0010011_0110000_001: if (Rs2D[2] & `ZBB_SUPPORTED & (Rs2D[4:1] == 4'b0010))
17'b0010011_0110000_001: if (`ZBB_SUPPORTED & (Rs2D[4:1] == 4'b0010))
BMUControlsD = `BMUCTRLW'b000_10_001_1_1_0_1_0_0_0_0_0; // sign extend instruction
else if (`ZBB_SUPPORTED & ((Rs2D[4:2]==3'b000) & ~(Rs2D[1] & Rs2D[0])))
BMUControlsD = `BMUCTRLW'b000_10_000_1_1_0_1_0_0_0_0_0; // count instruction
@ -163,16 +163,16 @@ module bmuctrl(
BMUControlsD = `BMUCTRLW'b110_01_111_1_0_0_1_1_0_0_0_0; // orn
17'b0110011_0100000_100: if (`ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b100_01_111_1_0_0_1_1_0_0_0_0; // xnor
17'b0010011_0110101_101: if (`XLEN == 64 & `ZBB_SUPPORTED & (Rs2D == 5'b11000))
BMUControlsD = `BMUCTRLW'b000_10_010_1_1_0_1_0_0_0_0_0; // rev8 (rv64)
17'b0010011_0110100_101: if (`XLEN == 32 & `ZBB_SUPPORTED & (Rs2D == 5'b11000))
BMUControlsD = `BMUCTRLW'b000_10_010_1_1_0_1_0_0_0_0_0; // rev8 (rv32)
17'b0010011_011010?_101: if ((`XLEN == 32 ^ Funct7D[0]) & `ZBB_SUPPORTED & (Rs2D == 5'b11000))
BMUControlsD = `BMUCTRLW'b000_10_010_1_1_0_1_0_0_0_0_0; // rev8
//17'b0010011_0110100_101: if (`XLEN == 32 & `ZBB_SUPPORTED & (Rs2D == 5'b11000))
// BMUControlsD = `BMUCTRLW'b000_10_010_1_1_0_1_0_0_0_0_0; // rev8 (rv32)
17'b0010011_0010100_101: if (`ZBB_SUPPORTED & Rs2D[4:0] == 5'b00111)
BMUControlsD = `BMUCTRLW'b000_10_010_1_1_0_1_0_0_0_0_0; // orc.b
17'b0110011_0000101_110: if (`ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b000_10_100_1_0_0_1_0_0_0_0_0; // max
BMUControlsD = `BMUCTRLW'b000_10_111_1_0_0_1_0_0_0_0_0; // max
17'b0110011_0000101_111: if (`ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b000_10_100_1_0_0_1_0_0_0_0_0; // maxu
BMUControlsD = `BMUCTRLW'b000_10_111_1_0_0_1_0_0_0_0_0; // maxu
17'b0110011_0000101_100: if (`ZBB_SUPPORTED)
BMUControlsD = `BMUCTRLW'b000_10_011_1_0_0_1_0_0_0_0_0; // min
17'b0110011_0000101_101: if (`ZBB_SUPPORTED)

14
src/ieu/bmu/zbb.sv
View File

@ -39,17 +39,17 @@ module zbb #(parameter WIDTH=32) (
output logic [WIDTH-1:0] ZBBResult); // ZBB result
logic [WIDTH-1:0] CntResult; // count result
logic [WIDTH-1:0] MinResult,MaxResult; // min,max result
logic [WIDTH-1:0] MinResult,MaxResult, MinMaxResult; // min,max result
logic [WIDTH-1:0] ByteResult; // byte results
logic [WIDTH-1:0] ExtResult; // sign/zero extend results
cnt #(WIDTH) cnt(.A(A), .RevA(RevA), .B(B[4:0]), .W64(W64), .CntResult(CntResult));
byteUnit #(WIDTH) bu(.A(A), .ByteSelect(B[0]), .ByteResult(ByteResult));
ext #(WIDTH) ext(.A(A), .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult(ExtResult));
cnt #(WIDTH) cnt(.A, .RevA, .B(B[4:0]), .W64, .CntResult);
byteUnit #(WIDTH) bu(.A, .ByteSelect(B[0]), .ByteResult);
ext #(WIDTH) ext(.A, .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult);
mux2 #(WIDTH) maxmux(A, B, lt, MaxResult);
mux2 #(WIDTH) minmux(B, A, lt, MinResult);
// ZBBSelect[2] differentiates between min(u) vs max(u) instruction
mux2 #(WIDTH) minmaxmux(B, A, lt^ZBBSelect[2], MinMaxResult);
// ZBB Result select mux
mux5 #(WIDTH) zbbresultmux(CntResult, ExtResult, ByteResult, MinResult, MaxResult, ZBBSelect, ZBBResult);
mux4 #(WIDTH) zbbresultmux(CntResult, ExtResult, ByteResult, MinMaxResult, ZBBSelect[1:0], ZBBResult);
endmodule