platform/wavelet3d: implement fixed-point multiply-add and dot-add

1 files changed, 55 insertions, 0 deletions

diff --git a/platform/wavelet3d/gfx_fixed_dotadd.sv b/platform/wavelet3d/gfx_fixed_dotadd.sv
new file mode 100644
index 0000000..fdd5ffd
--- /dev/null
+++ b/platform/wavelet3d/gfx_fixed_dotadd.sv
@@ -0,0 +1,55 @@
+module gfx_fixed_dotadd
+(
+	input  logic      clk,
+
+	input  gfx::fixed a0,
+	                  b0,
+	                  a1,
+	                  b1,
+	                  c,
+	input  logic      stall,
+
+	output gfx::fixed q
+);
+
+	import gfx::*;
+
+	fixed q0, a1_hold, b1_hold;
+
+	gfx_fixed_muladd muladd_0
+	(
+		.clk,
+		.a(a0),
+		.b(b0),
+		.c,
+		.q(q0),
+		.stall
+	);
+
+	gfx_pipes #(.WIDTH($bits(fixed)), .DEPTH(FIXED_MULADD_DEPTH)) a_pipes
+	(
+		.clk,
+		.in(a1),
+		.out(a1_hold),
+		.stall
+	);
+
+	gfx_pipes #(.WIDTH($bits(fixed)), .DEPTH(FIXED_MULADD_DEPTH)) b_pipes
+	(
+		.clk,
+		.in(b1),
+		.out(b1_hold),
+		.stall
+	);
+
+	gfx_fixed_muladd muladd_1
+	(
+		.clk,
+		.a(a1_hold),
+		.b(b1_hold),
+		.c(q0),
+		.q,
+		.stall
+	);
+
+endmodule