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decoder.sv: ZEXT.H is valid only with Zbb bitmanip extension (fix #1234) (#1236)

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Signed-off-by: André Sintzoff <andre.sintzoff@thalesgroup.com>
This commit is contained in:
André Sintzoff 2023-05-22 13:27:53 +02:00 • committed by GitHub
parent d0a4c9f82e
commit 99acdc271b
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1 changed files with 4 additions and 3 deletions
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core/decoder.sv
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@ -505,7 +505,6 @@ module decoder import ariane_pkg::*; (
{7'b000_0001, 3'b101}: instruction_o.op = ariane_pkg::DIVU;
{7'b000_0001, 3'b110}: instruction_o.op = ariane_pkg::REM;
{7'b000_0001, 3'b111}: instruction_o.op = ariane_pkg::REMU;
{7'b000_0100, 3'b100}: instruction_o.op = ariane_pkg::ZEXTH;
default: begin
illegal_instr_non_bm = 1'b1;
end
@ -537,6 +536,8 @@ module decoder import ariane_pkg::*; (
// Bitwise Shifting
{7'b011_0000, 3'b001}: instruction_o.op = ariane_pkg::ROL; // rol
{7'b011_0000, 3'b101}: instruction_o.op = ariane_pkg::ROR; // ror
// Zero Extend Op
{7'b000_0100, 3'b100}: instruction_o.op = ariane_pkg::ZEXTH;
default: begin
illegal_instr_bm = 1'b1;
end
@ -729,7 +730,7 @@ module decoder import ariane_pkg::*; (
3'b000: instruction_o.op = ariane_pkg::SB;
3'b001: instruction_o.op = ariane_pkg::SH;
3'b010: instruction_o.op = ariane_pkg::SW;
3'b011: if (riscv::XLEN==64) instruction_o.op = ariane_pkg::SD;
3'b011: if (riscv::XLEN==64) instruction_o.op = ariane_pkg::SD;
else illegal_instr = 1'b1;
default: illegal_instr = 1'b1;
endcase
@ -748,7 +749,7 @@ module decoder import ariane_pkg::*; (
3'b100: instruction_o.op = ariane_pkg::LBU;
3'b101: instruction_o.op = ariane_pkg::LHU;
3'b110: instruction_o.op = ariane_pkg::LWU;
3'b011: if (riscv::XLEN==64) instruction_o.op = ariane_pkg::LD;
3'b011: if (riscv::XLEN==64) instruction_o.op = ariane_pkg::LD;
else illegal_instr = 1'b1;
default: illegal_instr = 1'b1;
endcase