X-Git-Url: http://git.joshuawise.com/mandelfpga.git/blobdiff_plain/11cc2d9b78b4c1cb23002984474137dfe766eaab..02d0a24b9fcfab5be71820b3603fb88ebf0ce8cd:/Main.v

diff --git a/Main.v b/Main.v
index 79d8251..b6fbae5 100644
--- a/Main.v
+++ b/Main.v
@@ -74,7 +74,7 @@ module NaiveMultiplier(
 			  (y[10] ? (x >> 2) : 0))  +
 			(((y[9]  ? (x >> 3) : 0)   +
 			  (y[8]  ? (x >> 4) : 0))  +
-		    ((y[7]  ? (x >> 5) : 0)   +
+			 ((y[7]  ? (x >> 5) : 0)   +
 			  (y[6]  ? (x >> 6) : 0))))+
 			(((y[5]  ? (x >> 7) : 0)   +
 			  (y[4]  ? (x >> 8) : 0)   +
@@ -117,7 +117,7 @@ module MandelUnit(
 	wire [14:0] ri, diff;
 	wire [15:0] twocdiff;
 	wire r2sign, i2sign, risign, dsign;
-	wire [13:0] bigsum;
+	wire [14:0] bigsum;
 	wire bigsum_ovf;
 
 	reg [12:0] xd, yd;
@@ -131,8 +131,36 @@ module MandelUnit(
 	Multiplier i2m(clk, i[12:0], i[12:0], isign, isign, i2[12:0], i2sign, i2[13]);
 	Multiplier rim(clk, r[12:0], i[12:0], rsign, isign, ri[13:1], risign, ri[14]);
 
-	assign bigsum = r2[12:0] + i2[12:0];
-	assign bigsum_ovf = bigsum[13] | r2[13] | i2[13];
+	assign bigsum = r2[13:0] + i2[13:0];
+	wire shnasto = bigsum[14];
+	wire shnasto2 =		// o shi
+		((r[12] & i[12]) |
+		((r[12] ^ i[12]) &
+		((r[11] & i[11]) |
+		((r[11] ^ i[11]) &
+		((r[10] & i[10]) |
+		((r[10] ^ i[10]) &
+		((r[ 9] & i[ 9]) |
+		((r[ 9] ^ i[ 9]) &
+		((r[ 8] & i[ 8]) |
+		((r[ 8] ^ i[ 8]) &
+		((r[ 7] & i[ 7]) |
+		((r[ 7] ^ i[ 7]) &
+		((r[ 6] & i[ 6]) |
+		((r[ 6] ^ i[ 6]) &
+		((r[ 5] & i[ 5]) |
+		((r[ 5] ^ i[ 5]) &
+		((r[ 4] & i[ 4]) |
+		((r[ 4] ^ i[ 4]) &
+		((r[ 3] & i[ 3]) |
+		((r[ 3] ^ i[ 3]) &
+		((r[ 2] & i[ 2]) |
+		((r[ 2] ^ i[ 2]) &
+		((r[ 1] & i[ 1]) |
+		((r[ 1] ^ i[ 1]) &
+		 (r[ 0] & i[ 0])
+		))))))))))))))))))))))));
+	assign bigsum_ovf = shnasto | r2[13] | i2[13];
 	
 	assign twocdiff = r2 - i2;
 	assign diff = twocdiff[15] ? -twocdiff : twocdiff;