use the fp target attribute with fpu_save()/fpu_load()

otherwise clang 18 errors when inline assembly uses floating point
registers with nofp in -march

ok kettenis@

diff --git a/sys/arch/arm64/arm64/fpu.c b/sys/arch/arm64/arm64/fpu.c
index 0285ef7..a50cf63 100644 (file)
--- a/sys/arch/arm64/arm64/fpu.c
+++ b/sys/arch/arm64/arm64/fpu.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: fpu.c,v 1.1 2022/01/01 18:52:36 kettenis Exp $        */
+/*     $OpenBSD: fpu.c,v 1.2 2024/07/26 00:23:57 jsg Exp $     */
 /*
  * Copyright (c) 2022 Mark Kettenis <kettenis@openbsd.org>
  *
@@ -22,6 +22,7 @@
 
 #include <machine/armreg.h>
 
+__attribute__((target("+fp")))
 void
 fpu_save(struct proc *p)
 {
@@ -74,6 +75,7 @@ fpu_save(struct proc *p)
        fp->fp_cr = READ_SPECIALREG(fpcr);
 }
 
+__attribute__((target("+fp")))
 void
 fpu_load(struct proc *p)
 {