From 78c603144e90adababc672bbfe0624842fc977c5 Mon Sep 17 00:00:00 2001
From: Marc Marcos <marcmarcosmadruga@gmail.com>
Date: Wed, 6 May 2026 09:37:00 +0200
Subject: [PATCH] zfhmin microbenchmark

---
 zfhmin_micro/zfhmin.c | 57 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 zfhmin_micro/zfhmin.c

diff --git a/zfhmin_micro/zfhmin.c b/zfhmin_micro/zfhmin.c
new file mode 100644
index 0000000..224c452
--- /dev/null
+++ b/zfhmin_micro/zfhmin.c
@@ -0,0 +1,57 @@
+#include <math.h>
+#include <stdint.h>
+
+#define N 10
+
+static inline uint64_t read_cycles() {
+    uint64_t start;
+    asm volatile ("rdcycle %0" : "=r"(start));
+    return start;
+}
+
+int main() {
+  // fcvt.s.h
+
+  volatile float b;
+  volatile _Float16 d;
+  volatile double e;
+  volatile _Float16 g;
+
+  volatile _Float16 a = 3.0f;
+
+  read_cycles();
+  for (int i = 0; i < N; i++) {
+    b = (float) a;
+  }
+  read_cycles();
+
+  // fcvt.h.s
+
+  volatile float c = 3.0f;
+
+  read_cycles();
+  for (int i = 0; i < N; i++) {
+    d = (_Float16) c;
+  }
+  read_cycles();
+
+  // fcvt.d.h
+
+  read_cycles();
+  for (int i = 0; i < N; i++) {
+    double e = (double) a;
+  }
+  read_cycles();
+
+  // fcvt.h.d
+
+  volatile double f = 3.0f;
+
+  read_cycles();
+  for (int i = 0; i < N; i++) {
+    g = (_Float16) f;
+  }
+  read_cycles();
+
+  return 0;
+}