From a15febf91b8b08ede52f1ca2ad5dca7df732d33d Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Wed, 30 Apr 2003 22:22:29 +0000
Subject: [PATCH] Add AMD64 hooks

---
 sys/conf/kern.mk | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index 602fab487c90..ee632125786d 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -52,6 +52,15 @@ CFLAGS+=	-ffixed-r13 -mfixed-range=f32-f127 -mno-sdata
 CFLAGS+=	-mcmodel=medlow -msoft-float
 .endif
 
+#
+# For AMD64, use a medium model for now.  We'll switch to "kernel"
+# once pmap is ready.  Be excessively careful to not generate FPU code.
+#
+.if ${MACHINE_ARCH} == "amd64"
+CFLAGS+=	-mcmodel=medium -mno-red-zone \
+		-mfpmath=387 -mno-sse -mno-sse2 -mno-mmx -mno-3dnow -msoft-float
+.endif
+
 #
 # GCC 3.0 and above like to do certain optimizations based on the
 # assumption that the program is linked against libc.  Stop this.