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Merge pull request #181 from kipmacsaigoren/bitmanip_cleanup

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Bitmanip cleanup
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David Harris 2023-03-30 19:23:54 -07:00 committed by GitHub
commit e8deed7811
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5 changed files with 9 additions and 10 deletions
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4
src/ieu/alu.sv
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@ -37,7 +37,7 @@ module alu #(parameter WIDTH=32) (
input logic [1:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction input logic [1:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction
input logic [2:0] ZBBSelect, // ZBB mux select signal input logic [2:0] ZBBSelect, // ZBB mux select signal
input logic [2:0] Funct3, // For BMU decoding input logic [2:0] Funct3, // For BMU decoding
input logic [1:0] CompFlags, // Comparator flags input logic CompLT, // Less-Than flag from comparator
input logic [2:0] BALUControl, // ALU Control signals for B instructions in Execute Stage input logic [2:0] BALUControl, // ALU Control signals for B instructions in Execute Stage
output logic [WIDTH-1:0] Result, // ALU result output logic [WIDTH-1:0] Result, // ALU result
output logic [WIDTH-1:0] Sum); // Sum of operands output logic [WIDTH-1:0] Sum); // Sum of operands
@ -90,7 +90,7 @@ module alu #(parameter WIDTH=32) (
// Final Result B instruction select mux // Final Result B instruction select mux
if (`ZBC_SUPPORTED | `ZBS_SUPPORTED | `ZBA_SUPPORTED | `ZBB_SUPPORTED) begin : bitmanipalu if (`ZBC_SUPPORTED | `ZBS_SUPPORTED | `ZBA_SUPPORTED | `ZBB_SUPPORTED) begin : bitmanipalu
bitmanipalu #(WIDTH) balu(.A, .B, .W64, .BSelect, .ZBBSelect, bitmanipalu #(WIDTH) balu(.A, .B, .W64, .BSelect, .ZBBSelect,
.Funct3, .CompFlags, .BALUControl, .ALUResult, .FullResult, .Funct3, .CompLT, .BALUControl, .ALUResult, .FullResult,
.CondMaskB, .CondShiftA, .Result); .CondMaskB, .CondShiftA, .Result);
end else begin end else begin
assign Result = ALUResult; assign Result = ALUResult;

4
src/ieu/bmu/bitmanipalu.sv
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@ -35,7 +35,7 @@ module bitmanipalu #(parameter WIDTH=32) (
input logic [1:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction input logic [1:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction
input logic [2:0] ZBBSelect, // ZBB mux select signal input logic [2:0] ZBBSelect, // ZBB mux select signal
input logic [2:0] Funct3, // Funct3 field of opcode indicates operation to perform input logic [2:0] Funct3, // Funct3 field of opcode indicates operation to perform
input logic [1:0] CompFlags, // Comparator flags input logic CompLT, // Less-Than flag from comparator
input logic [2:0] BALUControl, // ALU Control signals for B instructions in Execute Stage input logic [2:0] BALUControl, // ALU Control signals for B instructions in Execute Stage
input logic [WIDTH-1:0] ALUResult, FullResult, // ALUResult, FullResult signals input logic [WIDTH-1:0] ALUResult, FullResult, // ALUResult, FullResult signals
output logic [WIDTH-1:0] CondMaskB, // B is conditionally masked for ZBS instructions output logic [WIDTH-1:0] CondMaskB, // B is conditionally masked for ZBS instructions
@ -84,7 +84,7 @@ module bitmanipalu #(parameter WIDTH=32) (
// ZBB Unit // ZBB Unit
if (`ZBB_SUPPORTED) begin: zbb if (`ZBB_SUPPORTED) begin: zbb
zbb #(WIDTH) ZBB(.A, .RevA, .B, .ALUResult, .W64, .lt(CompFlags[0]), .ZBBSelect, .ZBBResult); zbb #(WIDTH) ZBB(.A, .RevA, .B, .W64, .lt(CompLT), .ZBBSelect, .ZBBResult);
end else assign ZBBResult = 0; end else assign ZBBResult = 0;
// Result Select Mux // Result Select Mux

2
src/ieu/bmu/cnt.sv
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@ -32,7 +32,7 @@
module cnt #(parameter WIDTH = 32) ( module cnt #(parameter WIDTH = 32) (
input logic [WIDTH-1:0] A, RevA, // Operands input logic [WIDTH-1:0] A, RevA, // Operands
input logic [4:0] B, // Last 5 bits of immediate input logic [1:0] B, // Last 2 bits of immediate
input logic W64, // Indicates word operation input logic W64, // Indicates word operation
output logic [WIDTH-1:0] CntResult // count result output logic [WIDTH-1:0] CntResult // count result
); );

5
src/ieu/bmu/zbb.sv
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@ -32,10 +32,9 @@
module zbb #(parameter WIDTH=32) ( module zbb #(parameter WIDTH=32) (
input logic [WIDTH-1:0] A, RevA, B, // Operands input logic [WIDTH-1:0] A, RevA, B, // Operands
input logic [WIDTH-1:0] ALUResult, // ALU Result
input logic W64, // Indicates word operation input logic W64, // Indicates word operation
input logic lt, // lt flag input logic lt, // lt flag
input logic [2:0] ZBBSelect, // Indicates word operation input logic [2:0] ZBBSelect, // ZBB Result select signal
output logic [WIDTH-1:0] ZBBResult); // ZBB result output logic [WIDTH-1:0] ZBBResult); // ZBB result
logic [WIDTH-1:0] CntResult; // count result logic [WIDTH-1:0] CntResult; // count result
@ -43,7 +42,7 @@ module zbb #(parameter WIDTH=32) (
logic [WIDTH-1:0] ByteResult; // byte results logic [WIDTH-1:0] ByteResult; // byte results
logic [WIDTH-1:0] ExtResult; // sign/zero extend results logic [WIDTH-1:0] ExtResult; // sign/zero extend results
cnt #(WIDTH) cnt(.A, .RevA, .B(B[4:0]), .W64, .CntResult); cnt #(WIDTH) cnt(.A, .RevA, .B(B[1:0]), .W64, .CntResult);
byteUnit #(WIDTH) bu(.A, .ByteSelect(B[0]), .ByteResult); byteUnit #(WIDTH) bu(.A, .ByteSelect(B[0]), .ByteResult);
ext #(WIDTH) ext(.A, .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult); ext #(WIDTH) ext(.A, .ExtSelect({~B[2], {B[2] & B[0]}}), .ExtResult);

2
src/ieu/datapath.sv
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@ -114,7 +114,7 @@ module datapath (
comparator #(`XLEN) comp(ForwardedSrcAE, ForwardedSrcBE, BranchSignedE, FlagsE); comparator #(`XLEN) comp(ForwardedSrcAE, ForwardedSrcBE, BranchSignedE, FlagsE);
mux2 #(`XLEN) srcamux(ForwardedSrcAE, PCE, ALUSrcAE, SrcAE); mux2 #(`XLEN) srcamux(ForwardedSrcAE, PCE, ALUSrcAE, SrcAE);
mux2 #(`XLEN) srcbmux(ForwardedSrcBE, ImmExtE, ALUSrcBE, SrcBE); mux2 #(`XLEN) srcbmux(ForwardedSrcBE, ImmExtE, ALUSrcBE, SrcBE);
alu #(`XLEN) alu(SrcAE, SrcBE, W64E, SubArithE, ALUSelectE, BSelectE, ZBBSelectE, Funct3E, FlagsE, BALUControlE, ALUResultE, IEUAdrE); alu #(`XLEN) alu(SrcAE, SrcBE, W64E, SubArithE, ALUSelectE, BSelectE, ZBBSelectE, Funct3E, FlagsE[0], BALUControlE, ALUResultE, IEUAdrE);
mux2 #(`XLEN) altresultmux(ImmExtE, PCLinkE, JumpE, AltResultE); mux2 #(`XLEN) altresultmux(ImmExtE, PCLinkE, JumpE, AltResultE);
mux2 #(`XLEN) ieuresultmux(ALUResultE, AltResultE, ALUResultSrcE, IEUResultE); mux2 #(`XLEN) ieuresultmux(ALUResultE, AltResultE, ALUResultSrcE, IEUResultE);