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minor update

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This commit is contained in:
Blaise Tine
2020-12-26 14:47:41 -08:00
parent 33c431ed44
commit b2b8f190dd
9 changed files with 199 additions and 198 deletions
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97
hw/rtl/VX_mul_unit.v
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@@ -12,7 +12,6 @@ module VX_mul_unit #(
// Outputs
VX_commit_if mul_commit_if
);
localparam MULQ_BITS = `LOG2UP(`MULQ_SIZE);
wire [`MUL_BITS-1:0] alu_op = mul_req_if.op_type;
wire is_div_op = `IS_DIV_OP(alu_op);
@@ -31,34 +30,13 @@ module VX_mul_unit #(
wire mul_wb_out;
wire mul_valid_out;
wire mul_valid_in = mul_req_if.valid && !is_div_op && ~mulq_full;
wire mul_valid_in = mul_req_if.valid && !is_div_op;
wire mul_ready_in = ready_out || ~mul_valid_out;
wire mulq_push = mul_valid_in && mul_ready_in;
wire mulq_pop = mul_valid_out && ready_out;
wire mulq_full;
wire is_mulh_in = (alu_op != `MUL_MUL);
wire is_mulh_out;
VX_generic_queue #(
.DATAW (`NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + 1),
.SIZE (`MULQ_SIZE),
.FASTRAM (1)
) mul_metadata (
.clk (clk),
.reset (reset),
.push (mulq_push),
.pop (mulq_pop),
.data_in ({mul_req_if.wid, mul_req_if.tmask, mul_req_if.PC, mul_req_if.rd, mul_req_if.wb, is_mulh_in}),
.data_out ({mul_wid_out, mul_tmask_out, mul_PC_out, mul_rd_out, mul_wb_out, is_mulh_out}),
.full (mulq_full),
`UNUSED_PIN (empty),
`UNUSED_PIN (size)
);
for (genvar i = 0; i < `NUM_THREADS; i++) begin
for (genvar i = 0; i < `NUM_THREADS; i++) begin
wire [32:0] mul_in1 = {(alu_op != `MUL_MULHU) & alu_in1[i][31], alu_in1[i]};
wire [32:0] mul_in2 = {(alu_op != `MUL_MULHU && alu_op != `MUL_MULHSU) & alu_in2[i][31], alu_in2[i]};
`IGNORE_WARNINGS_BEGIN
@@ -66,31 +44,32 @@ module VX_mul_unit #(
`IGNORE_WARNINGS_END
VX_multiplier #(
.WIDTHA(33),
.WIDTHB(33),
.WIDTHP(66),
.SIGNED(1),
.LATENCY(`LATENCY_IMUL)
.WIDTHA (33),
.WIDTHB (33),
.WIDTHP (66),
.SIGNED (1),
.LATENCY (`LATENCY_IMUL)
) multiplier (
.clk(clk),
.enable(mul_ready_in),
.dataa(mul_in1),
.datab(mul_in2),
.result(mul_result_tmp)
.clk (clk),
.enable (mul_ready_in),
.dataa (mul_in1),
.datab (mul_in2),
.result (mul_result_tmp)
);
assign mul_result[i] = is_mulh_out ? mul_result_tmp[63:32] : mul_result_tmp[31:0];
end
VX_shift_register #(
.DATAW(1),
.DEPTH(`LATENCY_IMUL)
.DATAW (1 + `NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + 1),
.DEPTH (`LATENCY_IMUL),
.RESETW (1)
) mul_shift_reg (
.clk(clk),
.reset(reset),
.enable(mul_ready_in),
.data_in(mul_valid_in),
.data_out(mul_valid_out)
.reset (reset),
.enable (mul_ready_in),
.data_in ({mul_valid_in, mul_req_if.wid, mul_req_if.tmask, mul_req_if.PC, mul_req_if.rd, mul_req_if.wb, is_mulh_in}),
.data_out ({mul_valid_out, mul_wid_out, mul_tmask_out, mul_PC_out, mul_rd_out, mul_wb_out, is_mulh_out})
);
///////////////////////////////////////////////////////////////////////////
@@ -111,26 +90,26 @@ module VX_mul_unit #(
wire is_rem_op_out;
VX_serial_div #(
.WIDTHN(32),
.WIDTHD(32),
.WIDTHQ(32),
.WIDTHR(32),
.LANES(`NUM_THREADS),
.TAGW(`NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + 1)
.WIDTHN (32),
.WIDTHD (32),
.WIDTHQ (32),
.WIDTHR (32),
.LANES (`NUM_THREADS),
.TAGW (`NW_BITS + `NUM_THREADS + 32 + `NR_BITS + 1 + 1)
) divide (
.clk(clk),
.reset(reset),
.valid_in(div_valid_in),
.ready_in(div_ready_in),
.clk (clk),
.reset (reset),
.valid_in (div_valid_in),
.ready_in (div_ready_in),
.signed_mode(is_signed_div),
.tag_in({mul_req_if.wid, mul_req_if.tmask, mul_req_if.PC, mul_req_if.rd, mul_req_if.wb, is_rem_op_in}),
.numer(alu_in1),
.denom(alu_in2),
.quotient(div_result_tmp),
.remainder(rem_result_tmp),
.ready_out(div_ready_out),
.valid_out(div_valid_out),
.tag_out({div_wid_out, div_tmask_out, div_PC_out, div_rd_out, div_wb_out, is_rem_op_out})
.tag_in ({mul_req_if.wid, mul_req_if.tmask, mul_req_if.PC, mul_req_if.rd, mul_req_if.wb, is_rem_op_in}),
.numer (alu_in1),
.denom (alu_in2),
.quotient (div_result_tmp),
.remainder (rem_result_tmp),
.ready_out (div_ready_out),
.valid_out (div_valid_out),
.tag_out ({div_wid_out, div_tmask_out, div_PC_out, div_rd_out, div_wb_out, is_rem_op_out})
);
wire [`NUM_THREADS-1:0][31:0] div_result = is_rem_op_out ? rem_result_tmp : div_result_tmp;
@@ -161,6 +140,6 @@ module VX_mul_unit #(
);
// can accept new request?
assign mul_req_if.ready = is_div_op ? div_ready_in : (mul_ready_in && ~mulq_full);
assign mul_req_if.ready = is_div_op ? div_ready_in : mul_ready_in;
endmodule