Module Name: src
Committed By: rin
Date: Tue Sep 6 23:07:53 UTC 2022
Modified Files:
src/sys/arch/powerpc/fpu: fpu_emu.h
Log Message:
fpu_sub(): Do not invert sign bit of NaN.
Taken from FreeBSD:
https://cgit.freebsd.org/src/commit/lib/libc/sparc64/fpu?h=releng/12.3&id=8ff9d52cd08cbf31efde4052d3593a5680eaa2a5
To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/powerpc/fpu/fpu_emu.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/powerpc/fpu/fpu_emu.h
diff -u src/sys/arch/powerpc/fpu/fpu_emu.h:1.10 src/sys/arch/powerpc/fpu/fpu_emu.h:1.11
--- src/sys/arch/powerpc/fpu/fpu_emu.h:1.10 Mon Sep 5 00:27:16 2022
+++ src/sys/arch/powerpc/fpu/fpu_emu.h Tue Sep 6 23:07:53 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: fpu_emu.h,v 1.10 2022/09/05 00:27:16 rin Exp $ */
+/* $NetBSD: fpu_emu.h,v 1.11 2022/09/06 23:07:53 rin Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -163,7 +163,8 @@ struct fpemu {
* Each returns a pointer to the result and/or sets exceptions.
*/
struct fpn *fpu_add(struct fpemu *);
-#define fpu_sub(fe) ((fe)->fe_f2.fp_sign ^= 1, fpu_add(fe))
+#define fpu_sub(fe) \
+ ((ISNAN(&(fe)->fe_f2) ? 0 : ((fe)->fe_f2.fp_sign ^= 1)), fpu_add(fe))
struct fpn *fpu_mul(struct fpemu *);
struct fpn *fpu_div(struct fpemu *);
struct fpn *fpu_sqrt(struct fpemu *);
