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Cleanup
This commit is contained in:
Eddie Hung
parent
c76607b9bc
commit
d5cd2c80be
1 changed files with 58 additions and 70 deletions
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@ -97,25 +97,23 @@ module \$__mul_gen (A, B, Y);
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`else
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localparam sign_headroom = 0;
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`endif
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localparam n_floored = A_WIDTH/(`DSP_A_MAXWIDTH - sign_headroom);
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localparam n = n_floored + (n_floored*(`DSP_A_MAXWIDTH - sign_headroom) < A_WIDTH ? 1 : 0);
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wire [`DSP_A_MAXWIDTH+B_WIDTH-1:0] partial [n-1:1];
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localparam n = (A_WIDTH + `DSP_A_MAXWIDTH - sign_headroom - 1)/(`DSP_A_MAXWIDTH - sign_headroom);
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localparam partial_Y_WIDTH = `MIN(Y_WIDTH, B_WIDTH+`DSP_A_MAXWIDTH);
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wire [partial_Y_WIDTH-1:0] partial [n-1:1];
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wire [Y_WIDTH-1:0] partial_sum [n-2:0];
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localparam int_yw = `MIN(Y_WIDTH, B_WIDTH+`DSP_A_MAXWIDTH);
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\$__mul_gen #(
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.A_SIGNED(0),
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.B_SIGNED(B_SIGNED),
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.A_WIDTH(`DSP_A_MAXWIDTH),
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.B_WIDTH(B_WIDTH),
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.Y_WIDTH(int_yw)
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.Y_WIDTH(partial_Y_WIDTH)
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) mul_slice_first (
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.A({{sign_headroom{1'b0}}, A[`DSP_A_MAXWIDTH-sign_headroom-1:0]}),
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.B(B),
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.Y(partial_sum[0][int_yw-1:0])
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.Y(partial[0])
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);
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if (Y_WIDTH > int_yw)
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assign partial_sum[0][Y_WIDTH-1:int_yw]=0;
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assign partial_sum[0] = partial[0];
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for (i = 1; i < n-1; i=i+1) begin:slice
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\$__mul_gen #(
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@ -123,18 +121,18 @@ module \$__mul_gen (A, B, Y);
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.B_SIGNED(B_SIGNED),
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.A_WIDTH(`DSP_A_MAXWIDTH),
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.B_WIDTH(B_WIDTH),
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.Y_WIDTH(int_yw)
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.Y_WIDTH(partial_Y_WIDTH)
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) mul_slice (
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.A({{sign_headroom{1'b0}}, A[(i+1)*(`DSP_A_MAXWIDTH-sign_headroom)-1:i*(`DSP_A_MAXWIDTH-sign_headroom)]}),
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.A({{sign_headroom{1'b0}}, A[i*(`DSP_A_MAXWIDTH-sign_headroom) +: `DSP_A_MAXWIDTH-sign_headroom]}),
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.B(B),
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.Y(partial[i][int_yw-1:0])
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.Y(partial[i])
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);
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//assign partial_sum[i] = (partial[i] << i*`DSP_A_MAXWIDTH) + partial_sum[i-1];
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assign partial_sum[i] = {
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partial[i][int_yw-1:0]
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+ partial_sum[i-1][Y_WIDTH-1:(i*(`DSP_A_MAXWIDTH-sign_headroom))],
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partial_sum[i-1][(i*(`DSP_A_MAXWIDTH-sign_headroom))-1:0]
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};
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assign partial_sum[i] = (partial[i] << i*(`DSP_A_MAXWIDTH-sign_headroom)) + partial_sum[i-1];
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//assign partial_sum[i] = {
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// partial[i][partial_Y_WIDTH-1:0]
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// + partial_sum[i-1][Y_WIDTH-1:(i*(`DSP_A_MAXWIDTH-sign_headroom))],
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// partial_sum[i-1][(i*(`DSP_A_MAXWIDTH-sign_headroom))-1:0]
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//};
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end
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\$__mul_gen #(
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@ -148,12 +146,12 @@ module \$__mul_gen (A, B, Y);
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.B(B),
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.Y(partial[n-1][`MIN(Y_WIDTH, A_WIDTH-(n-1)*(`DSP_A_MAXWIDTH-sign_headroom)+B_WIDTH)-1:0])
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);
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//assign Y = (partial[n-1] << (n-1)*`DSP_A_MAXWIDTH) + partial_sum[n-2];
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assign Y = {
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partial[n-1][`MIN(Y_WIDTH, A_WIDTH-(n-1)*(`DSP_A_MAXWIDTH-sign_headroom)+B_WIDTH):0]
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+ partial_sum[n-2][Y_WIDTH-1:((n-1)*(`DSP_A_MAXWIDTH-sign_headroom))],
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partial_sum[n-2][((n-1)*(`DSP_A_MAXWIDTH-sign_headroom))-1:0]
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};
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assign Y = (partial[n-1] << (n-1)*(`DSP_A_MAXWIDTH-sign_headroom)) + partial_sum[n-2];
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//assign Y = {
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// partial[n-1][`MIN(Y_WIDTH, A_WIDTH-(n-1)*(`DSP_A_MAXWIDTH-sign_headroom)+B_WIDTH):0]
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// + partial_sum[n-2][Y_WIDTH-1:((n-1)*(`DSP_A_MAXWIDTH-sign_headroom))],
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// partial_sum[n-2][((n-1)*(`DSP_A_MAXWIDTH-sign_headroom))-1:0]
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//};
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end
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else if (B_WIDTH > `DSP_B_MAXWIDTH) begin
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`ifdef DSP_B_SIGNEDONLY
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@ -161,25 +159,23 @@ module \$__mul_gen (A, B, Y);
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`else
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localparam sign_headroom = 0;
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`endif
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localparam n_floored = B_WIDTH/(`DSP_B_MAXWIDTH - sign_headroom);
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localparam n = n_floored + (n_floored*(`DSP_B_MAXWIDTH - sign_headroom) < B_WIDTH ? 1 : 0);
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wire [A_WIDTH+`DSP_B_MAXWIDTH-1:0] partial [n-1:1];
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localparam n = (B_WIDTH + `DSP_B_MAXWIDTH - sign_headroom - 1)/(`DSP_B_MAXWIDTH - sign_headroom);
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localparam partial_Y_WIDTH = `MIN(Y_WIDTH, A_WIDTH+`DSP_B_MAXWIDTH);
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wire [partial_Y_WIDTH-1:0] partial [n-1:1];
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wire [Y_WIDTH-1:0] partial_sum [n-2:0];
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localparam int_yw = `MIN(Y_WIDTH, A_WIDTH+`DSP_B_MAXWIDTH);
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\$__mul_gen #(
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.A_SIGNED(A_SIGNED),
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.B_SIGNED(0),
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.A_WIDTH(A_WIDTH),
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.B_WIDTH(`DSP_B_MAXWIDTH),
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.Y_WIDTH(int_yw)
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.Y_WIDTH(partial_Y_WIDTH)
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) mul_first (
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.A(A),
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.B({{sign_headroom{1'b0}}, B[(`DSP_B_MAXWIDTH - sign_headroom)-1:0]}),
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.Y(partial_sum[0][int_yw-1:0])
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.B({{sign_headroom{1'b0}}, B[`DSP_B_MAXWIDTH-sign_headroom-1:0]}),
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.Y(partial[0])
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);
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if (Y_WIDTH > int_yw)
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assign partial_sum[0][Y_WIDTH-1:int_yw]=0;
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assign partial_sum[0] = partial[0];
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for (i = 1; i < n-1; i=i+1) begin:slice
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\$__mul_gen #(
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@ -187,23 +183,23 @@ module \$__mul_gen (A, B, Y);
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.B_SIGNED(0),
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.A_WIDTH(A_WIDTH),
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.B_WIDTH(`DSP_B_MAXWIDTH),
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.Y_WIDTH(int_yw)
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.Y_WIDTH(partial_Y_WIDTH)
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) mul (
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.A(A),
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.B({{sign_headroom{1'b0}}, B[(i+1)*(`DSP_B_MAXWIDTH - sign_headroom)-1:i*(`DSP_B_MAXWIDTH - sign_headroom)]}),
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.Y(partial[i][int_yw-1:0])
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.B({{sign_headroom{1'b0}}, B[i*(`DSP_B_MAXWIDTH-sign_headroom) +: `DSP_B_MAXWIDTH-sign_headroom]}),
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.Y(partial[i])
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);
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//assign partial_sum[i] = (partial[i] << i*`DSP_B_MAXWIDTH) + partial_sum[i-1];
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// was:
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assign partial_sum[i] = (partial[i] <<< i*(`DSP_B_MAXWIDTH - sign_headroom)) + partial_sum[i-1];
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//// was:
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////assign partial_sum[i] = {
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//// partial[i][A_WIDTH+`DSP_B_MAXWIDTH-1:`DSP_B_MAXWIDTH],
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//// partial[i][`DSP_B_MAXWIDTH-1:0] + partial_sum[i-1][A_WIDTH+(i*`DSP_B_MAXWIDTH)-1:A_WIDTH+((i-1)*`DSP_B_MAXWIDTH)],
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//// partial_sum[i-1][A_WIDTH+((i-1)*`DSP_B_MAXWIDTH):0]
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//assign partial_sum[i] = {
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// partial[i][A_WIDTH+`DSP_B_MAXWIDTH-1:`DSP_B_MAXWIDTH],
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// partial[i][`DSP_B_MAXWIDTH-1:0] + partial_sum[i-1][A_WIDTH+(i*`DSP_B_MAXWIDTH)-1:A_WIDTH+((i-1)*`DSP_B_MAXWIDTH)],
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// partial_sum[i-1][A_WIDTH+((i-1)*`DSP_B_MAXWIDTH):0]
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assign partial_sum[i] = {
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partial[i][int_yw-1:0]
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+ partial_sum[i-1][Y_WIDTH-1:(i*(`DSP_B_MAXWIDTH - sign_headroom))],
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partial_sum[i-1][(i*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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};
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// partial[i][partial_Y_WIDTH-1:0]
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// + partial_sum[i-1][Y_WIDTH-1:(i*(`DSP_B_MAXWIDTH - sign_headroom))],
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// partial_sum[i-1][(i*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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//};
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end
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\$__mul_gen #(
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@ -217,36 +213,28 @@ module \$__mul_gen (A, B, Y);
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.B(B[B_WIDTH-1:(n-1)*(`DSP_B_MAXWIDTH - sign_headroom)]),
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.Y(partial[n-1][`MIN(Y_WIDTH, A_WIDTH+B_WIDTH-(n-1)*(`DSP_B_MAXWIDTH - sign_headroom))-1:0])
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);
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// AMD: this came comment out -- looks closer to right answer
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//assign Y = (partial[n-1] << (n-1)*`DSP_B_MAXWIDTH) + partial_sum[n-2];
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// was (looks broken)
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assign Y = (partial[n-1] << (n-1)*(`DSP_B_MAXWIDTH - sign_headroom)) + partial_sum[n-2];
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//// was (looks broken)
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////assign Y = {
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//// partial[n-1][A_WIDTH+`DSP_B_MAXWIDTH-1:`DSP_B_MAXWIDTH],
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//// partial[n-1][`DSP_B_MAXWIDTH-1:0] + partial_sum[n-2][A_WIDTH+((n-1)*`DSP_B_MAXWIDTH)-1:A_WIDTH+((n-2)*`DSP_B_MAXWIDTH)],
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//// partial_sum[n-2][A_WIDTH+((n-2)*`DSP_B_MAXWIDTH):0]
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//assign Y = {
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// partial[n-1][A_WIDTH+`DSP_B_MAXWIDTH-1:`DSP_B_MAXWIDTH],
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// partial[n-1][`DSP_B_MAXWIDTH-1:0] + partial_sum[n-2][A_WIDTH+((n-1)*`DSP_B_MAXWIDTH)-1:A_WIDTH+((n-2)*`DSP_B_MAXWIDTH)],
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// partial_sum[n-2][A_WIDTH+((n-2)*`DSP_B_MAXWIDTH):0]
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assign Y = {
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partial[n-1][`MIN(Y_WIDTH, A_WIDTH+B_WIDTH-(n-1)*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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+ partial_sum[n-2][Y_WIDTH-1:((n-1)*(`DSP_B_MAXWIDTH - sign_headroom))],
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partial_sum[n-2][((n-1)*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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};
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// partial[n-1][`MIN(Y_WIDTH, A_WIDTH+B_WIDTH-(n-1)*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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// + partial_sum[n-2][Y_WIDTH-1:((n-1)*(`DSP_B_MAXWIDTH - sign_headroom))],
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// partial_sum[n-2][((n-1)*(`DSP_B_MAXWIDTH - sign_headroom))-1:0]
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//};
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end
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else begin
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wire [A_WIDTH+B_WIDTH-1:0] out;
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wire [(`DSP_A_MAXWIDTH+`DSP_B_MAXWIDTH)-(A_WIDTH+B_WIDTH)-1:0] dummy;
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wire Asign, Bsign;
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assign Asign = (A_SIGNED ? A[A_WIDTH-1] : 1'b0);
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assign Bsign = (B_SIGNED ? B[B_WIDTH-1] : 1'b0);
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(* keep *) wire [Y_WIDTH-1:0] Yunsigned;
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wire signed [`DSP_A_MAXWIDTH-1:0] Asigned = $signed(A);
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wire signed [`DSP_A_MAXWIDTH-1:0] Bsigned = $signed(B);
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`DSP_NAME _TECHMAP_REPLACE_ (
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.A({ {{`DSP_A_MAXWIDTH-A_WIDTH}{Asign}}, A }),
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.B({ {{`DSP_B_MAXWIDTH-B_WIDTH}{Bsign}}, B }),
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.Y({dummy, out})
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.A(Asigned),
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.B(Bsigned),
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.Y(Yunsigned)
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);
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if (Y_WIDTH < A_WIDTH+B_WIDTH)
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assign Y = out[Y_WIDTH-1:0];
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else begin
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wire Ysign = (A_SIGNED || B_SIGNED ? out[A_WIDTH+B_WIDTH-1] : 1'b0);
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assign Y = { {{Y_WIDTH-(A_WIDTH+B_WIDTH)}{Ysign}}, out[A_WIDTH+B_WIDTH-1:0] };
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end
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assign Y = $signed(Yunsigned[A_WIDTH+B_WIDTH-1:0]);
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end
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endgenerate
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endmodule
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