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fix FLT_ROUNDS to reflect the current rounding mode

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Implemented as a wrapper around fegetround introducing a new function
to the ABI: __flt_rounds. (fegetround cannot be used directly from float.h)
This commit is contained in:
Szabolcs Nagy 2015-03-07 11:00:37 +01:00 committed by Rich Felker
parent bd67959f3a
commit 559de8f5f0
11 changed files with 22 additions and 9 deletions
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1
arch/arm/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/i386/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#ifdef __FLT_EVAL_METHOD__
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#else

1
arch/microblaze/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/mips/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/or1k/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/powerpc/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/sh/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#define FLT_EVAL_METHOD 0
#define LDBL_TRUE_MIN 4.94065645841246544177e-324L

1
arch/x32/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#ifdef __FLT_EVAL_METHOD__
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#else

1
arch/x86_64/bits/float.h
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@ -1,4 +1,3 @@
#define FLT_ROUNDS 1
#ifdef __FLT_EVAL_METHOD__
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#else

3
include/float.h
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@ -1,6 +1,9 @@
#ifndef _FLOAT_H
#define _FLOAT_H
int __flt_rounds(void);
#define FLT_ROUNDS (__flt_rounds())
#define FLT_RADIX 2
#define FLT_TRUE_MIN 1.40129846432481707092e-45F

19
src/fenv/__flt_rounds.c Normal file
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@ -0,0 +1,19 @@
#include <float.h>
#include <fenv.h>
int __flt_rounds()
{
switch (fegetround()) {
#ifdef FE_TOWARDZERO
case FE_TOWARDZERO: return 0;
#endif
case FE_TONEAREST: return 1;
#ifdef FE_UPWARD
case FE_UPWARD: return 2;
#endif
#ifdef FE_DOWNWARD
case FE_DOWNWARD: return 3;
#endif
}
return -1;
}