diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2007-03-13 21:42:34 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-03-13 21:42:34 +0000 |
| commit | 96c565c1104af3a90de9a8ce502c56209bb4e68a (patch) | |
| tree | 4b9bfce7816e6e22549f08ba0496e2ad30e57ad5 | |
| parent | 14e24e6dfa3e04b3ec4b2c1534a090ba2e286366 (diff) | |
Set the DN bit in the fpscr upon startup, to prevent faulting when loading
denormals. This is recommended by the manual, and is necessary for the gdb
testsuite to pass; found by, discussed with, and ok kettenis@
(be sure to make includes before recompiling csu)
| -rw-r--r-- | lib/csu/sh/crt0.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/csu/sh/crt0.c b/lib/csu/sh/crt0.c index 01be7a702a5..6e08127090d 100644 --- a/lib/csu/sh/crt0.c +++ b/lib/csu/sh/crt0.c @@ -1,4 +1,4 @@ -/* $OpenBSD: crt0.c,v 1.2 2007/03/02 06:11:54 miod Exp $ */ +/* $OpenBSD: crt0.c,v 1.3 2007/03/13 21:42:33 miod Exp $ */ /* $NetBSD: crt0.c,v 1.10 2004/08/26 21:16:41 thorpej Exp $ */ /* @@ -40,6 +40,7 @@ #include <sys/param.h> #include <machine/asm.h> +#include <machine/fpu.h> #include <stdlib.h> static char *_strrchr(const char *, char); @@ -81,6 +82,8 @@ ___start(int argc, char **argv, char **envp, void *ps_strings, extern unsigned int __fpscr_values[2]; __set_fpscr(0); + __fpscr_values[0] |= FPSCR_DN; + __fpscr_values[1] |= FPSCR_DN; __asm__ __volatile__ ("lds %0, fpscr" : : "r" (__fpscr_values[1])); #endif |