From eb49b6d871825eaea4e93d47a4368df368b7101a Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Thu, 14 Mar 2024 23:05:08 -0600
Subject: platform/wavelet3d: implement fixed-point multiply-add and dot-add

---
 platform/wavelet3d/gfx_fixed_dotadd.sv | 55 ++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 platform/wavelet3d/gfx_fixed_dotadd.sv

(limited to 'platform/wavelet3d/gfx_fixed_dotadd.sv')

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
-- 
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