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[/] [ft816float/] [trunk/] [rtl/] [verilog2/] [mult128x128.sv] - Diff between revs 72 and 73

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Rev 72	Rev 73
Line 35...	Line 35...
`// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE`	`// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE`
`// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`	`// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`
`//`	`//`
`// ============================================================================`	`// ============================================================================`

//`define KARATSUBA 1	`define KARATSUBA 1

`ifdef KARATSUBA	`ifdef KARATSUBA

`module mult128x128(clk, ce, a, b, o);`	`module mult128x128(clk, ce, a, b, o);`
`input clk;`	`input clk;`
Line 48...	Line 48...
`input [127:0] b;`	`input [127:0] b;`
`output reg [255:0] o;`	`output reg [255:0] o;`

`reg [63:0] a2, b2;`	`reg [63:0] a2, b2;`
`reg [64:0] a1, b1;`	`reg [64:0] a1, b1;`
`reg [127:0] z0, z2, z0a, z2a, z0b, z2b, z0c, z2c, z0d, z2d, p3, p4;`	`reg [127:0] z0, z2, z0a, z2a, z0b, z2b, z0c, z2c, z0d, z2d, p3;`
	`reg [128:0] p4;`
`reg [128:0] z1; // extra bit for carry`	`reg [128:0] z1; // extra bit for carry`
`reg sgn2, sgn10;`	`reg sgn2, sgn10;`
`wire sgn9;`	`wire sgn9;`

`always @(posedge clk)`	`always @(posedge clk)`
Line 109...	Line 110...
`always @(posedge clk)`	`always @(posedge clk)`
`if (ce) z2c <= z2b;`	`if (ce) z2c <= z2b;`
`always @(posedge clk)`	`always @(posedge clk)`
`if (ce) z0c <= z0b;`	`if (ce) z0c <= z0b;`
`always @(posedge clk)`	`always @(posedge clk)`
`if (ce) z1 <= {{128{sgn10}},p4} + z2c + z0c;`	`if (ce) z1 <= {{128{p4[128]}},p4} + z2c + z0c;`

`always @(posedge clk)`	`always @(posedge clk)`
`if (ce) z2d <= z2c;`	`if (ce) z2d <= z2c;`
`always @(posedge clk)`	`always @(posedge clk)`
`if (ce) z0d <= z0c;`	`if (ce) z0d <= z0c;`

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[/] [ft816float/] [trunk/] [rtl/] [verilog2/] [mult128x128.sv] - Diff between revs 72 and 73