Moved to a more openbsd-like fenv.h
Factored out common declarations to include/fenv.h and pushed
the implementation to .c files.
Bug: 11050744
Change-Id: I446b13cc4bc599d328343a8d392b07de280f6304
diff --git a/libm/include/mips/machine/fenv.h b/libm/include/mips/machine/fenv.h
new file mode 100644
index 0000000..dcd0eb2
--- /dev/null
+++ b/libm/include/mips/machine/fenv.h
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
+ */
+
+/*
+ Rewritten for Android.
+*/
+
+/* MIPS FPU floating point control register bits.
+ *
+ * 31-25 -> floating point conditions code bits set by FP compare
+ * instructions
+ * 24 -> flush denormalized results to zero instead of
+ * causing unimplemented operation exception.
+ * 23 -> Condition bit
+ * 22 -> In conjunction with FS detects denormalized
+ * operands and replaces them internally with 0.
+ * 21 -> In conjunction with FS forces denormalized operands
+ * to the closest normalized value.
+ * 20-18 -> 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)
+ */
+
+#ifndef _MIPS_FENV_H_
+#define _MIPS_FENV_H_
+
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+typedef __uint32_t fenv_t;
+typedef __uint32_t lfexcept_t;
+
+/* Exception flags */
+#define FE_INVALID 0x40
+#define FE_DIVBYZERO 0x20
+#define FE_OVERFLOW 0x10
+#define FE_UNDERFLOW 0x08
+#define FE_INEXACT 0x04
+#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
+ FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
+
+#define _FCSR_CAUSE_SHIFT 10
+#define _ENABLE_SHIFT 5
+#define _FCSR_ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
+
+/* Rounding modes */
+#define FE_TONEAREST 0x0000
+#define FE_TOWARDZERO 0x0001
+#define FE_UPWARD 0x0002
+#define FE_DOWNWARD 0x0003
+
+#define _FCSR_RMODE_SHIFT 0
+#define _FCSR_RMASK 0x3
+
+__END_DECLS
+
+#endif /* !_MIPS_FENV_H_ */