From f2f21f405ae0a1f457f7bc32d5053f0a92959e72 Mon Sep 17 00:00:00 2001
From: Yann Herklotz <git@yannherklotz.com>
Date: Mon, 9 Nov 2020 19:33:52 +0000
Subject: Change and add back HTLgen

---
 include/hls.h | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

(limited to 'include')

diff --git a/include/hls.h b/include/hls.h
index b243fea..61c336b 100644
--- a/include/hls.h
+++ b/include/hls.h
@@ -4,8 +4,8 @@
 /*
  * Divider C implementation for faster frequency division.
  */
-unsigned int divider(unsigned int x, unsigned int y) {
-    unsigned int r0, q0, y0, y1;
+unsigned divider_fast(unsigned x, unsigned y) {
+    unsigned r0, q0, y0, y1;
 
     r0 = x;
     q0 = 0;
@@ -15,16 +15,29 @@ unsigned int divider(unsigned int x, unsigned int y) {
         y1 = 2 * y1;
     } while (y1 <= x);
     do {
-        y1 = y1 / 2;
-        q0 = 2 * q0;
+        y1 /= 2;
+        q0 *= 2;
         if (r0 >= y1) {
-            r0 = r0 - y1;
-            q0 = q0 + 1;
+            r0 -= y1;
+            q0++;
         }
     } while ((int)y1 != (int)y0);
     return q0;
 }
 
+unsigned divider(unsigned x, unsigned y) {
+    unsigned q0, acc;
+    q0 = 0;
+    acc = y;
+
+    while (acc <= x) {
+        q0++;
+        acc += y;
+    }
+
+    return q0;
+}
+
 /*
  * Signed division operation for faster frequency division.
  */
@@ -42,4 +55,18 @@ int sdivider(int N, int D) {
     }
 }
 
+int sdivider_fast(int N, int D) {
+    if (D < 0) {
+        if (N < 0)
+            return divider_fast(-N, -D);
+        else
+            return -divider_fast(N, -D);
+    } else {
+        if (N < 0)
+            return -divider_fast(-N, D);
+        else
+            return divider_fast(N, D);
+    }
+}
+
 #endif
-- 
cgit