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authorUlrich Drepper <drepper@redhat.com>2000-03-26 18:48:26 +0000
committerUlrich Drepper <drepper@redhat.com>2000-03-26 18:48:26 +0000
commit4fcddf8e57fa96dcf8759d95b5e427bd0cff69b5 (patch)
treed005a27000ed5f9b00c2830541f21690a7887eaa /sysdeps/arm/fpu
parent0efadcd9ac89b3a914926b2078d6840176b119d7 (diff)
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Update.
2000-03-24 Andreas Jaeger <aj@suse.de> * Makefile (postclean): Added soversions.i. 2000-03-24 Scott Bambrough <scottb@netwinder.org> * sysdeps/arm/fpu/fpu_control.h: Define _FPU_MASK_IM, _FPU_MASK_ZM, _FPU_MASK_OM, _FPU_MASK_UM, _FPU_MASK_PM, _FPU_MASK_DM, _FPU_DEFAULT, and _FPU_IEEE. Change _FPU_RESERVED. 2000-03-24 Scott Bambrough <scottb@netwinder.org> * sysdeps/unix/sysv/linux/arm/sys/ucontext.h: New file. 2000-03-24 Roland McGrath <roland@baalperazim.frob.com> * sysdeps/posix/getaddrinfo.c: Include <net/if.h> for if_nametoindex. (gaih_inet): Remove unused duplicate variable. * inet/getnameinfo.c (getnameinfo): Use IFNAMSIZ, not MAXHOSTNAMELEN. Don't use __libc_sa_len, which only exists for Linux. Just handle AF_INET and AF_INET6 directly as well as AF_LOCAL, since those are the only flavors supported by this function anyway. 2000-03-24 Geoff Clare <gwc@unisoft.com> * stdlib/strfmon.c: corrected problems with missing signs and missing or extra spaces; allow for sign strings longer than one character; add padding to ensure positive and negative formats are aligned when a left precision is used. 2000-03-26 Ulrich Drepper <drepper@redhat.com> * stdlib/random_r.c (__setstate_r): Allow RNGs of type 4. Patch by John Mizel <John.Mizel@msdw.com>.
Diffstat (limited to 'sysdeps/arm/fpu')
-rw-r--r--sysdeps/arm/fpu/fpu_control.h34
1 files changed, 25 insertions, 9 deletions
diff --git a/sysdeps/arm/fpu/fpu_control.h b/sysdeps/arm/fpu/fpu_control.h
index b5338c5755..dfcfaabfcd 100644
--- a/sysdeps/arm/fpu/fpu_control.h
+++ b/sysdeps/arm/fpu/fpu_control.h
@@ -1,5 +1,5 @@
/* FPU control word definitions. ARM version.
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -23,12 +23,12 @@
/* We have a slight terminology confusion here. On the ARM, the register
* we're interested in is actually the FPU status word - the FPU control
* word is something different (which is implementation-defined and only
- * accessible from supervisor mode.)
+ * accessible from supervisor mode.)
*
* The FPSR looks like this:
*
* 31-24 23-16 15-8 7-0
- * | system ID | trap enable | system control | exception flags |
+ * | system ID | trap enable | system control | exception flags |
*
* We ignore the system ID bits; for interest's sake they are:
*
@@ -40,7 +40,7 @@
* The trap enable and exception flags are both structured like this:
*
* 7 - 5 4 3 2 1 0
- * | reserved | INX | UFL | OFL | DVZ | IVO |
+ * | reserved | INX | UFL | OFL | DVZ | IVO |
*
* where a `1' bit in the enable byte means that the trap can occur, and
* a `1' bit in the flags byte means the exception has occurred.
@@ -57,7 +57,7 @@
*
* 7-5 4 3 2 1 0
* | reserved | AC | EP | SO | NE | ND |
- *
+ *
* where the bits mean
*
* ND - no denormalised numbers (force them all to zero)
@@ -67,11 +67,27 @@
* AC - use alternate definition for C flag on compare operations
*/
-#define _FPU_RESERVED 0xfff0e0f0 /* These bits are reserved. */
+/* masking of interrupts */
+#define _FPU_MASK_IM 0x00010000 /* invalid operation */
+#define _FPU_MASK_ZM 0x00020000 /* divide by zero */
+#define _FPU_MASK_OM 0x00040000 /* overflow */
+#define _FPU_MASK_UM 0x00080000 /* underflow */
+#define _FPU_MASK_PM 0x00100000 /* inexact */
+#define _FPU_MASK_DM 0x00000000 /* denormalized operation */
+
+/* The system id bytes cannot be changed.
+ Only the bottom 5 bits in the trap enable byte can be changed.
+ Only the bottom 5 bits in the system control byte can be changed.
+ Only the bottom 5 bits in the exception flags are used.
+ The exception flags are set by the fpu, but can be zeroed by the user. */
+#define _FPU_RESERVED 0xffe0e0e0 /* These bits are reserved. */
-/* The fdlibm code requires no interrupts for exceptions. Don't
- change the rounding mode, it would break long double I/O! */
-#define _FPU_DEFAULT 0x00001000 /* Default value. */
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+ no interrupts for exceptions, rounding to nearest. Changing the
+ rounding mode will break long double I/O. Turn on the AC bit,
+ the compiler generates code that assumes it is on. */
+#define _FPU_DEFAULT 0x00001000 /* Default value. */
+#define _FPU_IEEE 0x001f1000 /* Default + exceptions enabled. */
/* Type of the control word. */
typedef unsigned int fpu_control_t;