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fmax optimization bundle (250 MHz).

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This commit is contained in:
Blaise Tine
2021-09-08 02:26:39 -07:00
parent 05bc970900
commit 3d052e9428
9 changed files with 71 additions and 65 deletions
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26
hw/rtl/VX_decode.v
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@@ -2,15 +2,14 @@
`include "VX_print_instr.vh"
`ifdef EXT_F_ENABLE
`define USED_IREG(r) \
used_regs[{1'b0, r}] = 1
`define USED_IREG(r) \
r``_r = {1'b0, ``r}
`define USED_FREG(r) \
r``_r[5] = 1; \
used_regs[{1'b1, r}] = 1
`define USED_FREG(r) \
r``_r = {1'b1, ``r}
`else
`define USED_IREG(r) \
used_regs[r] = 1
r``_r = ``r
`endif
module VX_decode #(
@@ -38,7 +37,6 @@ module VX_decode #(
reg [31:0] imm;
reg use_rd, use_PC, use_imm;
reg is_join, is_wstall;
reg [`NUM_REGS-1:0] used_regs;
wire [31:0] instr = ifetch_rsp_if.data;
wire [6:0] opcode = instr[6:0];
@@ -57,23 +55,24 @@ module VX_decode #(
wire [12:0] b_imm = {instr[31], instr[7], instr[30:25], instr[11:8], 1'b0};
wire [20:0] jal_imm = {instr[31], instr[19:12], instr[20], instr[30:21], 1'b0};
wire [11:0] jalr_imm = {func7, rs2};
`UNUSED_VAR (rs3)
always @(*) begin
ex_type = 0;
op_type = 'x;
op_mod = 0;
rd_r = `NR_BITS'(rd);
rs1_r = `NR_BITS'(rs1);
rs2_r = `NR_BITS'(rs2);
rs3_r = `NR_BITS'(rs3);
rd_r = 0;
rs1_r = 0;
rs2_r = 0;
rs3_r = 0;
imm = 'x;
use_imm = 0;
use_PC = 0;
use_rd = 0;
is_join = 0;
is_wstall = 0;
used_regs = 0;
case (opcode)
`INST_I: begin
@@ -399,7 +398,6 @@ module VX_decode #(
assign decode_if.imm = imm;
assign decode_if.use_PC = use_PC;
assign decode_if.use_imm = use_imm;
assign decode_if.used_regs = used_regs;
///////////////////////////////////////////////////////////////////////////
@@ -421,7 +419,7 @@ module VX_decode #(
print_ex_type(decode_if.ex_type);
dpi_trace(", op=");
print_ex_op(decode_if.ex_type, decode_if.op_type, decode_if.op_mod);
dpi_trace(", mod=%0d, tmask=%b, wb=%b, rd=%0d, rs1=%0d, rs2=%0d, rs3=%0d, imm=%0h, use_pc=%b, use_imm=%b, use_regs=%b\n", decode_if.op_mod, decode_if.tmask, decode_if.wb, decode_if.rd, decode_if.rs1, decode_if.rs2, decode_if.rs3, decode_if.imm, decode_if.use_PC, decode_if.use_imm, decode_if.used_regs);
dpi_trace(", mod=%0d, tmask=%b, wb=%b, rd=%0d, rs1=%0d, rs2=%0d, rs3=%0d, imm=%0h, use_pc=%b, use_imm=%b\n", decode_if.op_mod, decode_if.tmask, decode_if.wb, decode_if.rd, decode_if.rs1, decode_if.rs2, decode_if.rs3, decode_if.imm, decode_if.use_PC, decode_if.use_imm);
end
end
`endif