From f66e777337d0d609b8bfa4cbc21630a2024fde7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ciro=20Santilli=20=E5=85=AD=E5=9B=9B=E4=BA=8B=E4=BB=B6=20?=
 =?UTF-8?q?=E6=B3=95=E8=BD=AE=E5=8A=9F?= <ciro.santilli@gmail.com>
Date: Sat, 22 Jun 2019 00:00:00 +0000
Subject: [PATCH] x86 asm: sqrt x87

---
 userland/arch/x86_64/inline_asm/sqrt_x87.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 userland/arch/x86_64/inline_asm/sqrt_x87.c

diff --git a/userland/arch/x86_64/inline_asm/sqrt_x87.c b/userland/arch/x86_64/inline_asm/sqrt_x87.c
new file mode 100644
index 0000000..b37aa06
--- /dev/null
+++ b/userland/arch/x86_64/inline_asm/sqrt_x87.c
@@ -0,0 +1,15 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#gcc-inline-assembly */
+
+#include <assert.h>
+
+int main(void) {
+    double io = 4.0;
+    __asm__ (
+        "fsqrt"
+        : "+t" (io)
+        :
+        :
+    );
+    assert(io == 2.0);
+    return 0;
+}