From a14fc04f3b9f5bcef941ea79c794532d7ca0e7fc Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sat, 21 Oct 2023 15:37:45 -0600
Subject: ip: downgrade to 16-bit floats

---
 rtl/gfx/gfx_defs.sv | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'rtl/gfx/gfx_defs.sv')

diff --git a/rtl/gfx/gfx_defs.sv b/rtl/gfx/gfx_defs.sv
index e52f243..d01822a 100644
--- a/rtl/gfx/gfx_defs.sv
+++ b/rtl/gfx/gfx_defs.sv
@@ -1,14 +1,16 @@
 `ifndef GFX_DEFS_SV
 `define GFX_DEFS_SV
 
-`define FP_ADD_STAGES 13
-`define FP_MUL_STAGES 6
-
+`define FLOAT_BITS     16
 `define FLOATS_PER_VEC 4
 `define VECS_PER_MAT   4
 
-typedef logic[31:0] fp;
-typedef fp          vec4[`FLOATS_PER_VEC];
-typedef vec4        mat4[`VECS_PER_MAT];
+// Target de 100MHz con float16, rounding aproximado
+`define FP_ADD_STAGES 4 // ~325 LUTs
+`define FP_MUL_STAGES 3 // ~119 LUTs ~1 bloque DSP
+
+typedef logic[`FLOAT_BITS - 1:0] fp;
+typedef fp                       vec4[`FLOATS_PER_VEC];
+typedef vec4                     mat4[`VECS_PER_MAT];
 
 `endif
-- 
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