Reworked storage architecture (moved I/O memory to a separate module, since there's

only one instance of input/output values, while storage manager has dual storage space
for P and Q multipliers).

Started working on microcoded layer, added input operation and modular multiplication.

1 files changed, 54 insertions, 0 deletions

diff --git a/rtl/modexpng_microcode.vh b/rtl/modexpng_microcode.vh
new file mode 100644
index 0000000..af21391
--- /dev/null
+++ b/rtl/modexpng_microcode.vh
@@ -0,0 +1,54 @@
+localparam UOP_OPCODE_W = 4;
+localparam UOP_CRT_W    = 1;
+localparam UOP_NPQ_W    = 1;
+localparam UOP_AUX_W    = 1;
+localparam UOP_LADDER_W = 1;
+localparam UOP_SEL_W    = 4 * BANK_ADDR_W;
+
+localparam UOP_ADDR_W = 6;  // 64 instructions
+
+localparam [UOP_ADDR_W -1:0] UOP_ADDR_OFFSET_USING_CRT = 6'd0;
+localparam [UOP_ADDR_W -1:0] UOP_ADDR_OFFSET_WITHOUT_CRT = 6'd31;
+
+
+//                 4              1           1           1           2              4*3=12
+localparam UOP_W = UOP_OPCODE_W + UOP_CRT_W + UOP_NPQ_W + UOP_AUX_W + UOP_LADDER_W + UOP_SEL_W;
+//                 [20:17]        [16]        [15]        [14]        [13:12]        [11:9][8:6][5:3][2:0]
+
+// OPCODE
+localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_STOP               = 4'd0;
+
+localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_INPUT_TO_WIDE      = 4'd1;
+localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_INPUT_TO_NARROW    = 4'd2;
+
+localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_OUTPUT_FROM_NARROW = 4'd3;
+
+//localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_COPY_CRT_Y2X  = 4'd0;
+
+localparam [UOP_OPCODE_W -1:0] UOP_OPCODE_MODULAR_MULTIPLY   = 4'd8;
+
+// CRT
+localparam [UOP_CRT_W -1:0] UOP_CRT_X   = 1'b0;
+localparam [UOP_CRT_W -1:0] UOP_CRT_Y   = 1'b1;
+localparam [UOP_CRT_W -1:0] UOP_CRT_DNC = 1'bX;
+
+// NPQ
+localparam [UOP_NPQ_W -1:0] UOP_NPQ_N   = 1'b0;
+localparam [UOP_NPQ_W -1:0] UOP_NPQ_PQ  = 1'b1;
+localparam [UOP_NPQ_W -1:0] UOP_NPQ_DNC = 1'bX;
+
+// AUX
+localparam [UOP_AUX_W -1:0] UOP_AUX_1   = 1'b0;
+localparam [UOP_AUX_W -1:0] UOP_AUX_2   = 1'b1;
+localparam [UOP_AUX_W -1:0] UOP_AUX_DNC = 1'bX;
+
+// LADDER
+localparam [UOP_LADDER_W -1:0] UOP_LADDER_00  = 2'b00;
+localparam [UOP_LADDER_W -1:0] UOP_LADDER_11  = 2'b11;
+localparam [UOP_LADDER_W -1:0] UOP_LADDER_D   = 2'b01;
+localparam [UOP_LADDER_W -1:0] UOP_LADDER_PQ  = 2'b10;
+localparam [UOP_LADDER_W -1:0] UOP_LADDER_DNC = 2'bXX;
+
+
+// SEL
+localparam [UOP_SEL_W -1:0] UOP_SEL_DNC_ALL = {4{BANK_DNC}};