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minor update

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This commit is contained in:
Blaise Tine 2021-02-22 13:30:45 -08:00
parent 1346d64ba9
commit 1792571e1b
2 changed files with 26 additions and 16 deletions
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36
hw/rtl/VX_decode.v
View file

@ -71,6 +71,7 @@ module VX_decode #(
wire alu_shift_i = (func3 == 3'h1) || (func3 == 3'h5);
wire [11:0] alu_shift_imm = {{7{1'b0}}, rs2};
wire [11:0] alu_imm = alu_shift_i ? alu_shift_imm : u_12;
always @(*) begin
case (opcode)
`INST_I: src2_imm = {{20{alu_imm[11]}}, alu_imm};
@ -89,6 +90,7 @@ module VX_decode #(
wire [31:0] jal_offset = {{11{jal_imm[20]}}, jal_imm};
wire [11:0] jalr_imm = {func7, rs2};
wire [31:0] jalr_offset = {{20{jalr_imm[11]}}, jalr_imm};
always @(*) begin
case (opcode)
`INST_JAL: jalx_offset = jal_offset;
@ -118,11 +120,16 @@ module VX_decode #(
`INST_JAL: br_op = `BR_JAL;
`INST_JALR: br_op = `BR_JALR;
`INST_SYS: begin
if (is_jals && u_12 == 12'h000) br_op = `BR_ECALL;
if (is_jals && u_12 == 12'h001) br_op = `BR_EBREAK;
if (is_jals && u_12 == 12'h302) br_op = `BR_MRET;
if (is_jals && u_12 == 12'h102) br_op = `BR_SRET;
if (is_jals && u_12 == 12'h7B2) br_op = `BR_DRET;
if (is_jals) begin
case (u_12)
12'h000: br_op = `BR_ECALL;
12'h001: br_op = `BR_EBREAK;
12'h302: br_op = `BR_MRET;
12'h102: br_op = `BR_SRET;
12'h7B2: br_op = `BR_DRET;
default:;
endcase
end
end
default:;
endcase
@ -205,9 +212,10 @@ module VX_decode #(
wire is_fmvw_clss = is_fci && (func7 == 7'h70); // move to int + class
wire is_fmvx = is_fci && (func7 == 7'h78); // move to float
wire is_fr4 = is_fmadd || is_fmsub || is_fnmsub || is_fnmadd;
wire is_fpu = (is_fl || is_fs || is_fci || is_fr4);
reg [2:0] frm;
wire is_fpu_no_mem = is_fci || is_fr4;
wire is_fpu = is_fl || is_fs || is_fci || is_fr4;
reg [`MOD_BITS-1:0] frm;
reg is_fsqrt;
always @(*) begin
@ -262,6 +270,7 @@ module VX_decode #(
wire is_fmvx = 0;
wire is_fr4 = 0;
wire is_fpu = 0;
wire is_fpu_no_mem= 0;
wire [2:0] frm = 0;
always @(*) begin
@ -328,7 +337,7 @@ module VX_decode #(
assign decode_if.ex_type = is_lsu ? `EX_LSU :
is_csr ? `EX_CSR :
is_mul ? `EX_MUL :
is_fpu ? `EX_FPU :
is_fpu_no_mem ? `EX_FPU :
is_gpu ? `EX_GPU :
is_br ? `EX_ALU :
(is_rtype || is_itype || is_lui || is_auipc) ? `EX_ALU :
@ -337,7 +346,7 @@ module VX_decode #(
assign decode_if.op_type = is_lsu ? `OP_BITS'(lsu_op) :
is_csr ? `OP_BITS'(csr_op) :
is_mul ? `OP_BITS'(mul_op) :
is_fpu ? `OP_BITS'(fpu_op) :
is_fpu_no_mem ? `OP_BITS'(fpu_op) :
is_gpu ? `OP_BITS'(gpu_op) :
is_br ? `OP_BITS'(br_op) :
(is_rtype || is_itype || is_lui || is_auipc) ? `OP_BITS'(alu_op) :
@ -375,9 +384,10 @@ module VX_decode #(
src2_imm;
assign decode_if.rs1_is_PC = is_auipc || is_btype || is_jal || is_jals;
assign decode_if.rs2_is_imm = is_itype || is_lui || is_auipc || is_csr_imm || is_br;
assign decode_if.op_mod = is_fpu ? frm : (is_br ? 1 : 0);
assign decode_if.rs2_is_imm = is_itype || is_lui || is_auipc || is_csr_imm || is_br;
wire [`MOD_BITS-1:0] alu_mod = is_br ? 1 : 0;
assign decode_if.op_mod = is_fpu_no_mem ? frm : alu_mod;
///////////////////////////////////////////////////////////////////////////

6
hw/rtl/VX_warp_sched.v
View file

@ -212,9 +212,9 @@ module VX_warp_sched #(
wire [`NUM_WARPS-1:0] schedule_ready = schedule_table & ~(stalled_warps | total_barrier_stall | fetch_lock);
always @(*) begin
schedule_valid = 0;
thread_mask = 'x;
warp_pc = 'x;
schedule_valid = 0;
thread_mask = 'x;
warp_pc = 'x;
scheduled_warp = 'x;
for (integer i = 0; i < `NUM_WARPS; ++i) begin
if (schedule_ready[i]) begin