Scaffolding for LUT proc macro

Author: Snehal-Reddy

Cargo.lock

@@ -13,10 +13,14 @@ anyhow = "1.0"
 log = "0.4"
 env_logger = "0.11.8"
 libc = "0.2"
+exp_lut_macro = { path = "./exp_lut_macro"}
 
 [dev-dependencies]
 criterion = { version = "0.7", features = ["html_reports"] }
 
+[workspace]
+members = ["exp_lut_macro"]
+
 [[bench]]
 name = "benchmarks"
 harness = false

Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "exp_lut_macro"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }

exp_lut_macro/Cargo.toml

@@ -0,0 +1,3 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;

exp_lut_macro/src/lib.rs

@@ -39,6 +39,13 @@ impl AnxiousState {
     }
 }
 
+/// Constants for the exponential lookup table
+const EXP_LOOKUP_START: f32 = -20.0;
+const EXP_LOOKUP_END: f32 = 20.0;
+const EXP_LOOKUP_STEPS: usize = 1000;
+const EXP_LOOKUP_STEP_SIZE: f32 = (EXP_LOOKUP_END - EXP_LOOKUP_START) / EXP_LOOKUP_STEPS as f32;
+
+
 #[inline(always)]
 /// We use a logistic function as the transformation function.
 /// f(vel) = max_sens / (1 + C * e^(-ramp_up_rate * vel)), where