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authorJoachim StroĢˆmbergson <joachim@secworks.se>2015-06-23 10:53:28 +0200
committerJoachim StroĢˆmbergson <joachim@secworks.se>2015-06-23 10:53:28 +0200
commite509e5dcbbd9d875cfffdc8a6dfb915d959f5235 (patch)
tree9ad6260bcac5011cb82338c23bf2ab29988e9ef5 /src
parent906b9f1a5dbe37be9ce09c54a93095c41baab42a (diff)
montprod now supports generic operand size.
Diffstat (limited to 'src')
-rw-r--r--src/rtl/montprod.v36
1 files changed, 18 insertions, 18 deletions
diff --git a/src/rtl/montprod.v b/src/rtl/montprod.v
index ffee748..c50751b 100644
--- a/src/rtl/montprod.v
+++ b/src/rtl/montprod.v
@@ -233,8 +233,8 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
begin
ready_reg <= 1'b1;
loop_ctr_reg <= 13'h0;
- word_index_reg <= 8'h0;
- word_index_prev_reg <= 8'h0;
+ word_index_reg <= {ADW{1'b0}};
+ word_index_prev_reg <= {ADW{1'b0}};
add_carry_in_sa_reg <= 1'b0;
add_carry_in_sm_reg <= 1'b0;
shr_carry_in_reg <= 1'b0;
@@ -242,8 +242,8 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
q_reg <= 1'b0;
s_mux_reg <= SMUX_0;
s_mem_we_reg <= 1'b0;
- s_mem_wr_addr_reg <= 8'h0;
- b_bit_index_reg <= 5'h0;
+ s_mem_wr_addr_reg <= {ADW{1'b0}};
+ b_bit_index_reg <= {(13 - ADW){1'b0}};
first_iteration_reg <= 1'b0;
montprod_ctrl_reg <= CTRL_IDLE;
end
@@ -312,11 +312,11 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
tmp_result_we = 1'b1;
- if (reset_word_index_lsw == 1'b1)
+ if (reset_word_index_lsw)
word_index_new = length_m1;
- else if (reset_word_index_msw == 1'b1)
- word_index_new = 8'h0;
+ else if (reset_word_index_msw)
+ word_index_new = {ADW{1'b0}};
else if (montprod_ctrl_reg == CTRL_CALC_SDIV2)
word_index_new = word_index_reg + 1'b1;
@@ -332,11 +332,11 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
always @*
begin : s_logic
shr_carry_in_new = 1'b0;
- muxed_s_mem_read_data = 32'h0;
- sa_adder_data_in = 32'h0;
+ muxed_s_mem_read_data = {OPW{1'b0}};
+ sa_adder_data_in = {OPW{1'b0}};
add_carry_in_sa_new = 1'b0;
add_carry_in_sm_new = 1'b0;
- s_mem_new = 32'h0;
+ s_mem_new = {OPW{1'b0}};
s_mem_we_new = 1'b0;
@@ -368,7 +368,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
SMUX_ADD:
begin
if (first_iteration_reg)
- muxed_s_mem_read_data = 32'h0;
+ muxed_s_mem_read_data = {OPW{1'b0}};
else
muxed_s_mem_read_data = s_mem_read_data;
@@ -383,7 +383,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
else if (q_reg)
s_mem_new = add_result_sm;
else if (first_iteration_reg)
- s_mem_new = 32'h0;
+ s_mem_new = {OPW{1'b0}};
else
s_mem_new = s_mem_read_data;
@@ -430,12 +430,12 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
loop_ctr_we = 1'b0;
length_m1 = length - 1'b1;
- b_bit_index_new = 5'h1f - loop_ctr_reg[4:0];
- b_word_index = loop_ctr_reg[12:5];
+ b_bit_index_new = (2**(13 - ADW) - 1) - loop_ctr_reg[(13 - ADW - 1) : 0];
+ b_word_index = loop_ctr_reg[12 : (13 - ADW)];
if (loop_ctr_set)
begin
- loop_ctr_new = {length, 5'b00000} - 1'b1;
+ loop_ctr_new = {length, {(13 - ADW){1'b0}}} - 1'b1;
loop_ctr_we = 1'b1;
end
@@ -485,7 +485,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
CTRL_INIT_S:
begin
- if (word_index_reg == 8'h0)
+ if (word_index_reg == 0)
begin
loop_ctr_set = 1'b1;
montprod_ctrl_new = CTRL_WAIT;
@@ -521,7 +521,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
begin
s_mux_new = SMUX_ADD;
- if (word_index_reg == 8'h0)
+ if (word_index_reg == 0)
begin
reset_word_index_lsw = 1'b1;
montprod_ctrl_new = CTRL_STALLPIPE_ADD;
@@ -571,7 +571,7 @@ module montprod #(parameter OPW = 32, parameter ADW = 8)
CTRL_EMIT_S:
begin
- if (word_index_prev_reg == 8'h0)
+ if (word_index_prev_reg == 0)
begin
ready_new = 1'b1;
ready_we = 1'b1;