From a287c06c278f88817feb435fa0f2dd53471c90b7 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Wed, 4 Oct 2023 23:10:28 +0200
Subject: compat/defs: add unroll pragma

---
 compat/defs.hpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/compat/defs.hpp b/compat/defs.hpp
index 7fa74c9f..6b80f6ea 100644
--- a/compat/defs.hpp
+++ b/compat/defs.hpp
@@ -61,3 +61,20 @@
 #else
 #define fm_no_unique_address no_unique_address
 #endif
+
+#ifdef _MSC_VER
+#define fm_UNROLL _Pragma("loop(ivdep)")
+#define fm_UNROLL_4 fm_UNROLL
+#define fm_UNROLL_8 fm_UNROLL
+#else
+#ifndef __SIZEOF_POINTER__
+#error "missing __SIZEOF_POINTER__"
+#endif
+#define fm_UNROLL_4 _Pragma("GCC unroll 4")
+#define fm_UNROLL_8 _Pragma("GCC unroll 8")
+#if __SIZEOF_POINTER__ >= 8
+#define fm_UNROLL _Pragma("GCC unroll 8")
+#else
+#define fm_UNROLL _Pragma("GCC unroll 4")
+#endif
+#endif
-- 
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