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-rw-r--r--libc/sysdeps/linux/alpha/Makefile1
-rw-r--r--libc/sysdeps/linux/alpha/fpu_control.h106
-rw-r--r--libc/sysdeps/linux/arm/Makefile1
-rw-r--r--libc/sysdeps/linux/arm/fpu_control.h102
-rw-r--r--libc/sysdeps/linux/common/Makefile5
-rw-r--r--libc/sysdeps/linux/common/fpu_control.h39
-rw-r--r--libc/sysdeps/linux/i386/Makefile1
-rw-r--r--libc/sysdeps/linux/i386/fpu_control.h98
-rw-r--r--libc/sysdeps/linux/m68k/Makefile1
-rw-r--r--libc/sysdeps/linux/m68k/fpu_control.h69
-rw-r--r--libc/sysdeps/linux/mips/Makefile1
-rw-r--r--libc/sysdeps/linux/mips/fpu_control.h98
-rw-r--r--libc/sysdeps/linux/powerpc/Makefile2
-rw-r--r--libc/sysdeps/linux/powerpc/fpu_control.h69
-rw-r--r--libc/sysdeps/linux/sh/Makefile1
-rw-r--r--libc/sysdeps/linux/sh/fpu_control.h56
-rw-r--r--libc/sysdeps/linux/sparc/Makefile1
-rw-r--r--libc/sysdeps/linux/sparc/fpu_control.h73
18 files changed, 722 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/alpha/Makefile b/libc/sysdeps/linux/alpha/Makefile
index c94c9751f..85c530999 100644
--- a/libc/sysdeps/linux/alpha/Makefile
+++ b/libc/sysdeps/linux/alpha/Makefile
@@ -54,6 +54,7 @@ $(COBJS): %.o : %.c
$(STRIPTOOL) -x -R .note -R .comment $*.o
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/alpha/fpu_control.h .
clean:
diff --git a/libc/sysdeps/linux/alpha/fpu_control.h b/libc/sysdeps/linux/alpha/fpu_control.h
new file mode 100644
index 000000000..28acdf170
--- /dev/null
+++ b/libc/sysdeps/linux/alpha/fpu_control.h
@@ -0,0 +1,106 @@
+/* FPU control word bits. Alpha-mapped-to-Intel version.
+ Copyright (C) 1996, 1998, 2000, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Olaf Flebbe.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _ALPHA_FPU_CONTROL_H
+#define _ALPHA_FPU_CONTROL_H
+
+/*
+ * Since many programs seem to hardcode the values passed to __setfpucw()
+ * (rather than using the manifest constants) we emulate the x87 interface
+ * here (at least where this makes sense).
+ *
+ * 15-13 12 11-10 9-8 7-6 5 4 3 2 1 0
+ * | reserved | IC | RC | PC | reserved | PM | UM | OM | ZM | DM | IM
+ *
+ * IM: Invalid operation mask
+ * DM: Denormalized operand mask
+ * ZM: Zero-divide mask
+ * OM: Overflow mask
+ * UM: Underflow mask
+ * PM: Precision (inexact result) mask
+ *
+ * Mask bit is 1 means no interrupt.
+ *
+ * PC: Precision control
+ * 11 - round to extended precision
+ * 10 - round to double precision
+ * 00 - round to single precision
+ *
+ * RC: Rounding control
+ * 00 - rounding to nearest
+ * 01 - rounding down (toward - infinity)
+ * 10 - rounding up (toward + infinity)
+ * 11 - rounding toward zero
+ *
+ * IC: Infinity control
+ * That is for 8087 and 80287 only.
+ *
+ * The hardware default is 0x037f. I choose 0x1372.
+ */
+
+#include <features.h>
+
+/* masking of interrupts */
+#define _FPU_MASK_IM 0x01
+#define _FPU_MASK_DM 0x02
+#define _FPU_MASK_ZM 0x04
+#define _FPU_MASK_OM 0x08
+#define _FPU_MASK_UM 0x10
+#define _FPU_MASK_PM 0x20
+
+/* precision control -- without effect on Alpha */
+#define _FPU_EXTENDED 0x300 /* RECOMMENDED */
+#define _FPU_DOUBLE 0x200
+#define _FPU_SINGLE 0x0 /* DO NOT USE */
+
+/*
+ * rounding control---notice that on the Alpha this affects only
+ * instructions with the dynamic rounding mode qualifier (/d).
+ */
+#define _FPU_RC_NEAREST 0x000 /* RECOMMENDED */
+#define _FPU_RC_DOWN 0x400
+#define _FPU_RC_UP 0x800
+#define _FPU_RC_ZERO 0xC00
+
+#define _FPU_RESERVED 0xF0C0 /* Reserved bits in cw */
+
+
+/* Now two recommended cw */
+
+/* Linux default:
+ - extended precision
+ - rounding to positive infinity. There is no /p instruction
+ qualifier. By setting the dynamic rounding mode to +infinity,
+ one can use /d to get round to +infinity with no extra overhead
+ (so long as the default isn't changed, of course...)
+ - no exceptions enabled. */
+
+#define _FPU_DEFAULT 0x137f
+
+/* IEEE: same as above. */
+#define _FPU_IEEE 0x137f
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t;
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _ALPHA_FPU_CONTROL */
diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index beed16b23..038b994a2 100644
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -62,6 +62,7 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/arm/fpu_control.h .
clean:
diff --git a/libc/sysdeps/linux/arm/fpu_control.h b/libc/sysdeps/linux/arm/fpu_control.h
new file mode 100644
index 000000000..65912e496
--- /dev/null
+++ b/libc/sysdeps/linux/arm/fpu_control.h
@@ -0,0 +1,102 @@
+/* FPU control word definitions. ARM version.
+ 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* 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.)
+ *
+ * The FPSR looks like this:
+ *
+ * 31-24 23-16 15-8 7-0
+ * | system ID | trap enable | system control | exception flags |
+ *
+ * We ignore the system ID bits; for interest's sake they are:
+ *
+ * 0000 "old" FPE
+ * 1000 FPPC hardware
+ * 0001 FPE 400
+ * 1001 FPA hardware
+ *
+ * The trap enable and exception flags are both structured like this:
+ *
+ * 7 - 5 4 3 2 1 0
+ * | 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.
+ *
+ * The exceptions are:
+ *
+ * IVO - invalid operation
+ * DVZ - divide by zero
+ * OFL - overflow
+ * UFL - underflow
+ * INX - inexact (do not use; implementations differ)
+ *
+ * The system control byte looks like this:
+ *
+ * 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)
+ * NE - enable NaN exceptions
+ * SO - synchronous operation
+ * EP - use expanded packed-decimal format
+ * AC - use alternate definition for C flag on compare operations
+ */
+
+/* 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 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;
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ ("rfs %0" : "=r" (cw))
+#define _FPU_SETCW(cw) __asm__ ("wfs %0" : : "r" (cw))
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index 5323df366..8bff24f2e 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -54,7 +54,7 @@ endif
OBJ=$(COBJS) $(MOBJ)
-all: $(STR_SYSCALLS) $(OBJ) $(LIBC)
+all: $(STR_SYSCALLS) $(OBJ) $(LIBC) headers
$(LIBC): ar-target
@@ -98,6 +98,9 @@ $(TOPDIR)lib/crtn.o:
$(AR) $(ARFLAGS) $(TOPDIR)lib/crtn.o
endif
+headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/common/fpu_control.h .
+
clean:
rm -f *.[oa] *~ core crt[in].* *.S
diff --git a/libc/sysdeps/linux/common/fpu_control.h b/libc/sysdeps/linux/common/fpu_control.h
new file mode 100644
index 000000000..4a1b07d23
--- /dev/null
+++ b/libc/sysdeps/linux/common/fpu_control.h
@@ -0,0 +1,39 @@
+/* FPU control word definitions. Stub version.
+ Copyright (C) 1996, 1997, 1998 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+#define _FPU_RESERVED 0xffffffff /* These bits are reserved and not changed. */
+
+/* The fdlibm code requires no interrupts for exceptions. Don't
+ change the rounding mode, it would break long double I/O! */
+#define _FPU_DEFAULT 0x00000000 /* Default value. */
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t;
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) 0
+#define _FPU_SETCW(cw) do { } while (0)
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile
index 11df4cbb0..2f721eb6e 100644
--- a/libc/sysdeps/linux/i386/Makefile
+++ b/libc/sysdeps/linux/i386/Makefile
@@ -65,6 +65,7 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/i386/fpu_control.h .
clean:
diff --git a/libc/sysdeps/linux/i386/fpu_control.h b/libc/sysdeps/linux/i386/fpu_control.h
new file mode 100644
index 000000000..ed9bf388a
--- /dev/null
+++ b/libc/sysdeps/linux/i386/fpu_control.h
@@ -0,0 +1,98 @@
+/* FPU control word bits. i387 version.
+ Copyright (C) 1993,1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Olaf Flebbe.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H 1
+
+/* Here is the dirty part. Set up your 387 through the control word
+ * (cw) register.
+ *
+ * 15-13 12 11-10 9-8 7-6 5 4 3 2 1 0
+ * | reserved | IC | RC | PC | reserved | PM | UM | OM | ZM | DM | IM
+ *
+ * IM: Invalid operation mask
+ * DM: Denormalized operand mask
+ * ZM: Zero-divide mask
+ * OM: Overflow mask
+ * UM: Underflow mask
+ * PM: Precision (inexact result) mask
+ *
+ * Mask bit is 1 means no interrupt.
+ *
+ * PC: Precision control
+ * 11 - round to extended precision
+ * 10 - round to double precision
+ * 00 - round to single precision
+ *
+ * RC: Rounding control
+ * 00 - rounding to nearest
+ * 01 - rounding down (toward - infinity)
+ * 10 - rounding up (toward + infinity)
+ * 11 - rounding toward zero
+ *
+ * IC: Infinity control
+ * That is for 8087 and 80287 only.
+ *
+ * The hardware default is 0x037f which we use.
+ */
+
+#include <features.h>
+
+/* masking of interrupts */
+#define _FPU_MASK_IM 0x01
+#define _FPU_MASK_DM 0x02
+#define _FPU_MASK_ZM 0x04
+#define _FPU_MASK_OM 0x08
+#define _FPU_MASK_UM 0x10
+#define _FPU_MASK_PM 0x20
+
+/* precision control */
+#define _FPU_EXTENDED 0x300 /* libm requires double extended precision. */
+#define _FPU_DOUBLE 0x200
+#define _FPU_SINGLE 0x0
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
+#define _FPU_RC_DOWN 0x400
+#define _FPU_RC_UP 0x800
+#define _FPU_RC_ZERO 0xC00
+
+#define _FPU_RESERVED 0xF0C0 /* Reserved bits in cw */
+
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+ and no interrupts for exceptions, rounding to nearest. */
+
+#define _FPU_DEFAULT 0x037f
+
+/* IEEE: same as above. */
+#define _FPU_IEEE 0x037f
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (*&cw))
+#define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (*&cw))
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* fpu_control.h */
diff --git a/libc/sysdeps/linux/m68k/Makefile b/libc/sysdeps/linux/m68k/Makefile
index a98352198..7369bc925 100644
--- a/libc/sysdeps/linux/m68k/Makefile
+++ b/libc/sysdeps/linux/m68k/Makefile
@@ -65,6 +65,7 @@ ifneq ($(strip $(HAVE_ELF)),y)
echo "Working around compiler bug in the m68k-pic-coff toolchain"
cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/m68k/float.h .
endif
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/m68k/fpu_control.h .
clean:
diff --git a/libc/sysdeps/linux/m68k/fpu_control.h b/libc/sysdeps/linux/m68k/fpu_control.h
new file mode 100644
index 000000000..1b2ba87c9
--- /dev/null
+++ b/libc/sysdeps/linux/m68k/fpu_control.h
@@ -0,0 +1,69 @@
+/* FPU control word definitions. PowerPC version.
+ Copyright (C) 1996, 1997, 1998 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
+#define _FPU_RC_DOWN 0x03
+#define _FPU_RC_UP 0x02
+#define _FPU_RC_ZERO 0x01
+
+#define _FPU_MASK_NI 0x04 /* non-ieee mode */
+
+/* masking of interrupts */
+#define _FPU_MASK_ZM 0x10 /* zero divide */
+#define _FPU_MASK_OM 0x40 /* overflow */
+#define _FPU_MASK_UM 0x20 /* underflow */
+#define _FPU_MASK_XM 0x08 /* inexact */
+#define _FPU_MASK_IM 0x80 /* invalid operation */
+
+#define _FPU_RESERVED 0xffffff00 /* These bits are reserved are not changed. */
+
+/* The fdlibm code requires no interrupts for exceptions. */
+#define _FPU_DEFAULT 0x00000000 /* Default value. */
+
+/* IEEE: same as above, but (some) exceptions;
+ we leave the 'inexact' exception off.
+ */
+#define _FPU_IEEE 0x000000f0
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(__cw) ( { \
+ union { double d; fpu_control_t cw[2]; } \
+ tmp __attribute__ ((__aligned__(8))); \
+ __asm__ ("mffs 0; stfd%U0 0,%0" : "=m" (tmp.d) : : "fr0"); \
+ (__cw)=tmp.cw[1]; \
+ tmp.cw[1]; } )
+#define _FPU_SETCW(__cw) { \
+ union { double d; fpu_control_t cw[2]; } \
+ tmp __attribute__ ((__aligned__(8))); \
+ tmp.cw[0] = 0xFFF80000; /* More-or-less arbitrary; this is a QNaN. */ \
+ tmp.cw[1] = __cw; \
+ __asm__ ("lfd%U0 0,%0; mtfsf 255,0" : : "m" (tmp.d) : "fr0"); \
+}
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/mips/Makefile b/libc/sysdeps/linux/mips/Makefile
index eaeff33b7..a226a8466 100644
--- a/libc/sysdeps/linux/mips/Makefile
+++ b/libc/sysdeps/linux/mips/Makefile
@@ -55,6 +55,7 @@ $(COBJS): %.o : %.c
headers:
cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/mips/sgidefs.h .
# cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/mips/regdef.h .
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/mips/fpu_control.h .
clean:
rm -f *.[oa] *~ core
diff --git a/libc/sysdeps/linux/mips/fpu_control.h b/libc/sysdeps/linux/mips/fpu_control.h
new file mode 100644
index 000000000..da18deab5
--- /dev/null
+++ b/libc/sysdeps/linux/mips/fpu_control.h
@@ -0,0 +1,98 @@
+/* FPU control word bits. Mips version.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Olaf Flebbe and Ralf Baechle.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* MIPS FPU floating point control register bits.
+ *
+ * 31-25 -> floating point conditions code bits 7-1. These bits are only
+ * available in MIPS IV.
+ * 24 -> flush denormalized results to zero instead of
+ * causing unimplemented operation exception. This bit is only
+ * available for MIPS III and newer.
+ * 23 -> Condition bit
+ * 22-18 -> reserved (read as 0, write with 0)
+ * 17 -> cause bit for unimplemented operation
+ * 16 -> cause bit for invalid exception
+ * 15 -> cause bit for division by zero exception
+ * 14 -> cause bit for overflow exception
+ * 13 -> cause bit for underflow exception
+ * 12 -> cause bit for inexact exception
+ * 11 -> enable exception for invalid exception
+ * 10 -> enable exception for division by zero exception
+ * 9 -> enable exception for overflow exception
+ * 8 -> enable exception for underflow exception
+ * 7 -> enable exception for inexact exception
+ * 6 -> flag invalid exception
+ * 5 -> flag division by zero exception
+ * 4 -> flag overflow exception
+ * 3 -> flag underflow exception
+ * 2 -> flag inexact exception
+ * 1-0 -> rounding control
+ *
+ *
+ * Rounding Control:
+ * 00 - rounding to nearest (RN)
+ * 01 - rounding toward zero (RZ)
+ * 10 - rounding (up) toward plus infinity (RP)
+ * 11 - rounding (down)toward minus infinity (RM)
+ */
+
+#include <features.h>
+
+/* masking of interrupts */
+#define _FPU_MASK_V 0x0800 /* Invalid operation */
+#define _FPU_MASK_Z 0x0400 /* Division by zero */
+#define _FPU_MASK_O 0x0200 /* Overflow */
+#define _FPU_MASK_U 0x0100 /* Underflow */
+#define _FPU_MASK_I 0x0080 /* Inexact operation */
+
+/* flush denormalized numbers to zero */
+#define _FPU_FLUSH_TZ 0x1000000
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
+#define _FPU_RC_ZERO 0x1
+#define _FPU_RC_UP 0x2
+#define _FPU_RC_DOWN 0x3
+
+#define _FPU_RESERVED 0xfe3c0000 /* Reserved bits in cw */
+
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+ and no interrupts for exceptions, rounding to nearest. */
+
+#define _FPU_DEFAULT 0x00000000
+
+/* IEEE: same as above, but exceptions */
+#define _FPU_IEEE 0x00000F80
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw))
+#define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw))
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* fpu_control.h */
diff --git a/libc/sysdeps/linux/powerpc/Makefile b/libc/sysdeps/linux/powerpc/Makefile
index c1cd0055c..e9798cf7b 100644
--- a/libc/sysdeps/linux/powerpc/Makefile
+++ b/libc/sysdeps/linux/powerpc/Makefile
@@ -65,7 +65,7 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
-
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/powerpc/fpu_control.h .
clean:
rm -f *.[oa] *~ core
diff --git a/libc/sysdeps/linux/powerpc/fpu_control.h b/libc/sysdeps/linux/powerpc/fpu_control.h
new file mode 100644
index 000000000..1b2ba87c9
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/fpu_control.h
@@ -0,0 +1,69 @@
+/* FPU control word definitions. PowerPC version.
+ Copyright (C) 1996, 1997, 1998 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
+#define _FPU_RC_DOWN 0x03
+#define _FPU_RC_UP 0x02
+#define _FPU_RC_ZERO 0x01
+
+#define _FPU_MASK_NI 0x04 /* non-ieee mode */
+
+/* masking of interrupts */
+#define _FPU_MASK_ZM 0x10 /* zero divide */
+#define _FPU_MASK_OM 0x40 /* overflow */
+#define _FPU_MASK_UM 0x20 /* underflow */
+#define _FPU_MASK_XM 0x08 /* inexact */
+#define _FPU_MASK_IM 0x80 /* invalid operation */
+
+#define _FPU_RESERVED 0xffffff00 /* These bits are reserved are not changed. */
+
+/* The fdlibm code requires no interrupts for exceptions. */
+#define _FPU_DEFAULT 0x00000000 /* Default value. */
+
+/* IEEE: same as above, but (some) exceptions;
+ we leave the 'inexact' exception off.
+ */
+#define _FPU_IEEE 0x000000f0
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(__cw) ( { \
+ union { double d; fpu_control_t cw[2]; } \
+ tmp __attribute__ ((__aligned__(8))); \
+ __asm__ ("mffs 0; stfd%U0 0,%0" : "=m" (tmp.d) : : "fr0"); \
+ (__cw)=tmp.cw[1]; \
+ tmp.cw[1]; } )
+#define _FPU_SETCW(__cw) { \
+ union { double d; fpu_control_t cw[2]; } \
+ tmp __attribute__ ((__aligned__(8))); \
+ tmp.cw[0] = 0xFFF80000; /* More-or-less arbitrary; this is a QNaN. */ \
+ tmp.cw[1] = __cw; \
+ __asm__ ("lfd%U0 0,%0; mtfsf 255,0" : : "m" (tmp.d) : "fr0"); \
+}
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/sh/Makefile b/libc/sysdeps/linux/sh/Makefile
index 758d4462d..b4266c9f5 100644
--- a/libc/sysdeps/linux/sh/Makefile
+++ b/libc/sysdeps/linux/sh/Makefile
@@ -64,6 +64,7 @@ gcrt1.o: $(CRT0_DEPS)
endif
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/sh/fpu_control.h .
clean:
rm -f *.[oa] *~ core
diff --git a/libc/sysdeps/linux/sh/fpu_control.h b/libc/sysdeps/linux/sh/fpu_control.h
new file mode 100644
index 000000000..43eb9e549
--- /dev/null
+++ b/libc/sysdeps/linux/sh/fpu_control.h
@@ -0,0 +1,56 @@
+/* FPU control word definitions. SH version.
+ Copyright (C) 1999, 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* masking of interrupts */
+#define _FPU_MASK_VM 0x0800 /* Invalid operation */
+#define _FPU_MASK_ZM 0x0400 /* Division by zero */
+#define _FPU_MASK_OM 0x0200 /* Overflow */
+#define _FPU_MASK_UM 0x0100 /* Underflow */
+#define _FPU_MASK_IM 0x0080 /* Inexact operation */
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
+#define _FPU_RC_ZERO 0x1
+
+#define _FPU_RESERVED 0xffc00000 /* These bits are reserved. */
+
+/* The fdlibm code requires strict IEEE double precision arithmetic,
+ and no interrupts for exceptions, rounding to nearest. */
+#define _FPU_DEFAULT 0x00080000 /* Default value. */
+#define _FPU_IEEE 0x00080f80 /* Default + exceptions enabled. */
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t;
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw))
+
+#if defined __GNUC__
+#define _FPU_SETCW(cw) __set_fpscr ((cw))
+#else
+#define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw))
+#endif
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/sparc/Makefile b/libc/sysdeps/linux/sparc/Makefile
index 1491cf343..19e9d9394 100644
--- a/libc/sysdeps/linux/sparc/Makefile
+++ b/libc/sysdeps/linux/sparc/Makefile
@@ -55,6 +55,7 @@ $(COBJS): %.o : %.c
$(STRIPTOOL) -x -R .note -R .comment $*.o
headers:
+ cd $(TOPDIR)/include && ln -fs ../libc/sysdeps/linux/sparc/fpu_control.h .
clean:
rm -f *.[oa] *~ core
diff --git a/libc/sysdeps/linux/sparc/fpu_control.h b/libc/sysdeps/linux/sparc/fpu_control.h
new file mode 100644
index 000000000..b29734ce2
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/fpu_control.h
@@ -0,0 +1,73 @@
+/* FPU control word bits. SPARC version.
+ Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Miguel de Icaza
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H 1
+
+
+#include <features.h>
+#include <bits/wordsize.h>
+
+/* masking of interrupts */
+#define _FPU_MASK_IM 0x08000000
+#define _FPU_MASK_OM 0x04000000
+#define _FPU_MASK_UM 0x02000000
+#define _FPU_MASK_ZM 0x01000000
+#define _FPU_MASK_PM 0x00800000
+
+/* precision control */
+#define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */
+#define _FPU_DOUBLE 0x20000000
+#define _FPU_80BIT 0x30000000
+#define _FPU_SINGLE 0x10000000 /* DO NOT USE */
+
+/* rounding control / Sparc */
+#define _FPU_RC_DOWN 0xc0000000
+#define _FPU_RC_UP 0x80000000
+#define _FPU_RC_ZERO 0x40000000
+#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
+
+#define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */
+
+
+/* Now two recommended cw */
+
+/* Linux and IEEE default:
+ - extended precision
+ - rounding to nearest
+ - no exceptions */
+#define _FPU_DEFAULT 0x0
+#define _FPU_IEEE 0x0
+
+/* Type of the control word. */
+typedef unsigned long int fpu_control_t;
+
+#if __WORDSIZE == 64
+# define _FPU_GETCW(cw) __asm__ ("stx %%fsr,%0" : "=m" (*&cw))
+# define _FPU_SETCW(cw) __asm__ ("ldx %0,%%fsr" : : "m" (*&cw))
+#else
+# define _FPU_GETCW(cw) __asm__ ("st %%fsr,%0" : "=m" (*&cw))
+# define _FPU_SETCW(cw) __asm__ ("ld %0,%%fsr" : : "m" (*&cw))
+#endif
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#endif /* fpu_control.h */
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