fix FLT_ROUNDS to reflect the current rounding mode

Implemented as a wrapper around fegetround introducing a new function
to the ABI: __flt_rounds. (fegetround cannot be used directly from float.h)

diff --git a/arch/arm/bits/float.h b/arch/arm/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/arm/bits/float.h
+++ b/arch/arm/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/i386/bits/float.h b/arch/i386/bits/float.h
index c356cba..dd6e402 100644 (file)
--- a/arch/i386/bits/float.h
+++ b/arch/i386/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #ifdef __FLT_EVAL_METHOD__
 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
 #else

diff --git a/arch/microblaze/bits/float.h b/arch/microblaze/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/microblaze/bits/float.h
+++ b/arch/microblaze/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/mips/bits/float.h b/arch/mips/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/mips/bits/float.h
+++ b/arch/mips/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/or1k/bits/float.h b/arch/or1k/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/or1k/bits/float.h
+++ b/arch/or1k/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/powerpc/bits/float.h b/arch/powerpc/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/powerpc/bits/float.h
+++ b/arch/powerpc/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/sh/bits/float.h b/arch/sh/bits/float.h
index ec46b94..c4a655e 100644 (file)
--- a/arch/sh/bits/float.h
+++ b/arch/sh/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #define FLT_EVAL_METHOD 0
 
 #define LDBL_TRUE_MIN 4.94065645841246544177e-324L

diff --git a/arch/x32/bits/float.h b/arch/x32/bits/float.h
index 9ea2991..4d8e786 100644 (file)
--- a/arch/x32/bits/float.h
+++ b/arch/x32/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #ifdef __FLT_EVAL_METHOD__
 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
 #else

diff --git a/arch/x86_64/bits/float.h b/arch/x86_64/bits/float.h
index 9ea2991..4d8e786 100644 (file)
--- a/arch/x86_64/bits/float.h
+++ b/arch/x86_64/bits/float.h
@@ -1,4 +1,3 @@
-#define FLT_ROUNDS 1
 #ifdef __FLT_EVAL_METHOD__
 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
 #else

diff --git a/include/float.h b/include/float.h
index 161e167..c6429d3 100644 (file)
--- a/include/float.h
+++ b/include/float.h
@@ -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

diff --git a/src/fenv/__flt_rounds.c b/src/fenv/__flt_rounds.c
new file mode 100644 (file)
index 0000000..ec0b368
--- /dev/null
+++ b/src/fenv/__flt_rounds.c
@@ -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;
+}