added spqlios as submodule

base2k/examples/fft.rs

@@ -0,0 +1,57 @@
+use std::ffi::c_void;
+use std::time::Instant;
+
+use spqlios::bindings::*;
+
+fn main() {
+    let log_bound: usize = 19;
+
+    let n: usize = 2048;
+    let m: usize = n >> 1;
+
+    let mut a: Vec<i64> = vec![i64::default(); n];
+    let mut b: Vec<i64> = vec![i64::default(); n];
+    let mut c: Vec<i64> = vec![i64::default(); n];
+
+    a.iter_mut().enumerate().for_each(|(i, x)| *x = i as i64);
+    b[1] = 1;
+
+    println!("{:?}", b);
+
+    unsafe {
+        let reim_fft_precomp = new_reim_fft_precomp(m as u32, 2);
+        let reim_ifft_precomp = new_reim_ifft_precomp(m as u32, 1);
+
+        let buf_a = reim_fft_precomp_get_buffer(reim_fft_precomp, 0);
+        let buf_b = reim_fft_precomp_get_buffer(reim_fft_precomp, 1);
+        let buf_c = reim_ifft_precomp_get_buffer(reim_ifft_precomp, 0);
+
+        let now = Instant::now();
+        (0..1024).for_each(|_| {
+            reim_from_znx64_simple(m as u32, log_bound as u32, buf_a as *mut c_void, a.as_ptr());
+            reim_fft(reim_fft_precomp, buf_a);
+
+            reim_from_znx64_simple(m as u32, log_bound as u32, buf_b as *mut c_void, b.as_ptr());
+            reim_fft(reim_fft_precomp, buf_b);
+
+            reim_fftvec_mul_simple(
+                m as u32,
+                buf_c as *mut c_void,
+                buf_a as *mut c_void,
+                buf_b as *mut c_void,
+            );
+            reim_ifft(reim_ifft_precomp, buf_c);
+
+            reim_to_znx64_simple(
+                m as u32,
+                m as f64,
+                log_bound as u32,
+                c.as_mut_ptr(),
+                buf_c as *mut c_void,
+            )
+        });
+
+        println!("time: {}us", now.elapsed().as_micros());
+        println!("{:?}", &c[..16]);
+    }
+}