Module Name: src
Committed By: thorpej
Date: Wed Sep 2 03:41:56 UTC 2020
Modified Files:
src/sys/lib/libkern: softfloat-specialize.h softfloat.h
Log Message:
Update to the SoftFloat-2c version of softfloat-specialize.h and softfloat.h.
This includes a simplification of the license and updates the comments. NFC.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/lib/libkern/softfloat-specialize.h
cvs rdiff -u -r1.5 -r1.6 src/sys/lib/libkern/softfloat.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/lib/libkern/softfloat-specialize.h
diff -u src/sys/lib/libkern/softfloat-specialize.h:1.2 src/sys/lib/libkern/softfloat-specialize.h:1.3
--- src/sys/lib/libkern/softfloat-specialize.h:1.2 Mon Apr 28 20:24:06 2008
+++ src/sys/lib/libkern/softfloat-specialize.h Wed Sep 2 03:41:56 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: softfloat-specialize.h,v 1.2 2008/04/28 20:24:06 martin Exp $ */
+/* $NetBSD: softfloat-specialize.h,v 1.3 2020/09/02 03:41:56 thorpej Exp $ */
/* This is a derivative work. */
@@ -31,68 +31,55 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
-/*
-===============================================================================
-
-This C source fragment is part of the SoftFloat IEC/IEEE Floating-point
-Arithmetic Package, Release 2a.
-
-Written by John R. Hauser. This work was made possible in part by the
-International Computer Science Institute, located at Suite 600, 1947 Center
-Street, Berkeley, California 94704. Funding was partially provided by the
-National Science Foundation under grant MIP-9311980. The original version
-of this code was written as part of a project to build a fixed-point vector
-processor in collaboration with the University of California at Berkeley,
-overseen by Profs. Nelson Morgan and John Wawrzynek. More information
-is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
-arithmetic/SoftFloat.html'.
-
-THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
-has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
-TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
-PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
-AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
-
-Derivative works are acceptable, even for commercial purposes, so long as
-(1) they include prominent notice that the work is derivative, and (2) they
-include prominent notice akin to these four paragraphs for those parts of
-this code that are retained.
+/*============================================================================
-===============================================================================
-*/
-
-/*
--------------------------------------------------------------------------------
-Underflow tininess-detection mode, statically initialized to default value.
--------------------------------------------------------------------------------
-*/
+This C source fragment is part of the Berkeley SoftFloat IEEE Floating-Point
+Arithmetic Package, Release 2c, by John R. Hauser.
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
+been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
+RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
+AND ORGANIZATIONS WHO CAN AND WILL TOLERATE ALL LOSSES, COSTS, OR OTHER
+PROBLEMS THEY INCUR DUE TO THE SOFTWARE WITHOUT RECOMPENSE FROM JOHN HAUSER OR
+THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE, AND WHO FURTHERMORE EFFECTIVELY
+INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE
+(possibly via similar legal notice) AGAINST ALL LOSSES, COSTS, OR OTHER
+PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE, OR
+INCURRED BY ANYONE DUE TO A DERIVATIVE WORK THEY CREATE USING ANY PART OF THE
+SOFTWARE.
+
+Derivative works require also that (1) the source code for the derivative work
+includes prominent notice that the work is derivative, and (2) the source code
+includes prominent notice of these three paragraphs for those parts of this
+code that are retained.
+
+=============================================================================*/
+
+/*----------------------------------------------------------------------------
+| Underflow tininess-detection mode, statically initialized to default value.
+| (The declaration in `softfloat.h' must match the `int8' type here.)
+*----------------------------------------------------------------------------*/
/* [ MP safe, does not change dynamically ] */
int float_detect_tininess = float_tininess_after_rounding;
-/*
--------------------------------------------------------------------------------
-Internal canonical NaN format.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Internal canonical NaN format.
+*----------------------------------------------------------------------------*/
typedef struct {
flag sign;
bits64 high, low;
} commonNaNT;
-/*
--------------------------------------------------------------------------------
-The pattern for a default generated single-precision NaN.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| The pattern for a default generated single-precision NaN.
+*----------------------------------------------------------------------------*/
#define float32_default_nan 0xFFC00000
-/*
--------------------------------------------------------------------------------
-Returns 1 if the single-precision floating-point value `a' is a NaN;
-otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the single-precision floating-point value `a' is a NaN;
+| otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
static flag float32_is_nan( float32 a )
{
@@ -100,12 +87,11 @@ static flag float32_is_nan( float32 a )
}
-/*
--------------------------------------------------------------------------------
-Returns 1 if the single-precision floating-point value `a' is a signaling
-NaN; otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the single-precision floating-point value `a' is a signaling
+| NaN; otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
flag float32_is_signaling_nan( float32 a )
{
@@ -113,13 +99,12 @@ flag float32_is_signaling_nan( float32 a
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the single-precision floating-point NaN
-`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
-exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the single-precision floating-point NaN
+| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
+| exception is raised.
+*----------------------------------------------------------------------------*/
+
static commonNaNT float32ToCommonNaN( float32 a )
{
commonNaNT z;
@@ -132,12 +117,11 @@ static commonNaNT float32ToCommonNaN( fl
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the canonical NaN `a' to the single-
-precision floating-point format.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the canonical NaN `a' to the single-
+| precision floating-point format.
+*----------------------------------------------------------------------------*/
+
static float32 commonNaNToFloat32( commonNaNT a )
{
@@ -145,13 +129,12 @@ static float32 commonNaNToFloat32( commo
}
-/*
--------------------------------------------------------------------------------
-Takes two single-precision floating-point values `a' and `b', one of which
-is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
-signaling NaN, the invalid exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Takes two single-precision floating-point values `a' and `b', one of which
+| is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
+| signaling NaN, the invalid exception is raised.
+*----------------------------------------------------------------------------*/
+
static float32 propagateFloat32NaN( float32 a, float32 b )
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
@@ -180,14 +163,17 @@ static float32 propagateFloat32NaN( floa
}
-
/*
--------------------------------------------------------------------------------
-Returns the result of converting the double-precision floating-point NaN
-`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
-exception is raised.
--------------------------------------------------------------------------------
-*/
+ * float64_default_nan, float64_is_nan(), float64_is_signaling_nan()
+ * have moved to softfloat.h.
+ */
+
+/*----------------------------------------------------------------------------
+| Returns the result of converting the double-precision floating-point NaN
+| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
+| exception is raised.
+*----------------------------------------------------------------------------*/
+
static commonNaNT float64ToCommonNaN( float64 a )
{
commonNaNT z;
@@ -200,12 +186,11 @@ static commonNaNT float64ToCommonNaN( fl
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the canonical NaN `a' to the double-
-precision floating-point format.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the canonical NaN `a' to the double-
+| precision floating-point format.
+*----------------------------------------------------------------------------*/
+
static float64 commonNaNToFloat64( commonNaNT a )
{
@@ -216,13 +201,12 @@ static float64 commonNaNToFloat64( commo
}
-/*
--------------------------------------------------------------------------------
-Takes two double-precision floating-point values `a' and `b', one of which
-is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
-signaling NaN, the invalid exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Takes two double-precision floating-point values `a' and `b', one of which
+| is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
+| signaling NaN, the invalid exception is raised.
+*----------------------------------------------------------------------------*/
+
static float64 propagateFloat64NaN( float64 a, float64 b )
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
@@ -253,22 +237,19 @@ static float64 propagateFloat64NaN( floa
#ifdef FLOATX80
-/*
--------------------------------------------------------------------------------
-The pattern for a default generated extended double-precision NaN. The
-`high' and `low' values hold the most- and least-significant bits,
-respectively.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| The pattern for a default generated double-extended-precision NaN.
+| The `high' and `low' values hold the most- and least-significant bits,
+| respectively.
+*----------------------------------------------------------------------------*/
#define floatx80_default_nan_high 0xFFFF
#define floatx80_default_nan_low LIT64( 0xC000000000000000 )
-/*
--------------------------------------------------------------------------------
-Returns 1 if the extended double-precision floating-point value `a' is a
-NaN; otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the double-extended-precision floating-point value `a' is a
+| NaN; otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
static flag floatx80_is_nan( floatx80 a )
{
@@ -276,12 +257,11 @@ static flag floatx80_is_nan( floatx80 a
}
-/*
--------------------------------------------------------------------------------
-Returns 1 if the extended double-precision floating-point value `a' is a
-signaling NaN; otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the double-extended-precision floating-point value `a' is a
+| signaling NaN; otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
flag floatx80_is_signaling_nan( floatx80 a )
{
bits64 aLow;
@@ -294,13 +274,12 @@ flag floatx80_is_signaling_nan( floatx80
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the extended double-precision floating-
-point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
-invalid exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the double-extended-precision floating-
+| point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
+| invalid exception is raised.
+*----------------------------------------------------------------------------*/
+
static commonNaNT floatx80ToCommonNaN( floatx80 a )
{
commonNaNT z;
@@ -313,12 +292,11 @@ static commonNaNT floatx80ToCommonNaN( f
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the canonical NaN `a' to the extended
-double-precision floating-point format.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the canonical NaN `a' to the double-
+| extended-precision floating-point format.
+*----------------------------------------------------------------------------*/
+
static floatx80 commonNaNToFloatx80( commonNaNT a )
{
floatx80 z;
@@ -329,13 +307,12 @@ static floatx80 commonNaNToFloatx80( com
}
-/*
--------------------------------------------------------------------------------
-Takes two extended double-precision floating-point values `a' and `b', one
-of which is a NaN, and returns the appropriate NaN result. If either `a' or
-`b' is a signaling NaN, the invalid exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Takes two double-extended-precision floating-point values `a' and `b', one
+| of which is a NaN, and returns the appropriate NaN result. If either `a' or
+| `b' is a signaling NaN, the invalid exception is raised.
+*----------------------------------------------------------------------------*/
+
static floatx80 propagateFloatx80NaN( floatx80 a, floatx80 b )
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
@@ -368,21 +345,18 @@ static floatx80 propagateFloatx80NaN( fl
#ifdef FLOAT128
-/*
--------------------------------------------------------------------------------
-The pattern for a default generated quadruple-precision NaN. The `high' and
-`low' values hold the most- and least-significant bits, respectively.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| The pattern for a default generated quadruple-precision NaN. The `high' and
+| `low' values hold the most- and least-significant bits, respectively.
+*----------------------------------------------------------------------------*/
#define float128_default_nan_high LIT64( 0xFFFF800000000000 )
#define float128_default_nan_low LIT64( 0x0000000000000000 )
-/*
--------------------------------------------------------------------------------
-Returns 1 if the quadruple-precision floating-point value `a' is a NaN;
-otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the quadruple-precision floating-point value `a' is a NaN;
+| otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
flag float128_is_nan( float128 a )
{
@@ -392,12 +366,11 @@ flag float128_is_nan( float128 a )
}
-/*
--------------------------------------------------------------------------------
-Returns 1 if the quadruple-precision floating-point value `a' is a
-signaling NaN; otherwise returns 0.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns 1 if the quadruple-precision floating-point value `a' is a
+| signaling NaN; otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
flag float128_is_signaling_nan( float128 a )
{
@@ -407,13 +380,12 @@ flag float128_is_signaling_nan( float128
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the quadruple-precision floating-point NaN
-`a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
-exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the quadruple-precision floating-point NaN
+| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
+| exception is raised.
+*----------------------------------------------------------------------------*/
+
static commonNaNT float128ToCommonNaN( float128 a )
{
commonNaNT z;
@@ -425,12 +397,11 @@ static commonNaNT float128ToCommonNaN( f
}
-/*
--------------------------------------------------------------------------------
-Returns the result of converting the canonical NaN `a' to the quadruple-
-precision floating-point format.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Returns the result of converting the canonical NaN `a' to the quadruple-
+| precision floating-point format.
+*----------------------------------------------------------------------------*/
+
static float128 commonNaNToFloat128( commonNaNT a )
{
float128 z;
@@ -441,13 +412,12 @@ static float128 commonNaNToFloat128( com
}
-/*
--------------------------------------------------------------------------------
-Takes two quadruple-precision floating-point values `a' and `b', one of
-which is a NaN, and returns the appropriate NaN result. If either `a' or
-`b' is a signaling NaN, the invalid exception is raised.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Takes two quadruple-precision floating-point values `a' and `b', one of
+| which is a NaN, and returns the appropriate NaN result. If either `a' or
+| `b' is a signaling NaN, the invalid exception is raised.
+*----------------------------------------------------------------------------*/
+
static float128 propagateFloat128NaN( float128 a, float128 b )
{
flag aIsNaN, aIsSignalingNaN, bIsNaN, bIsSignalingNaN;
Index: src/sys/lib/libkern/softfloat.h
diff -u src/sys/lib/libkern/softfloat.h:1.5 src/sys/lib/libkern/softfloat.h:1.6
--- src/sys/lib/libkern/softfloat.h:1.5 Sun Dec 31 11:43:42 2017
+++ src/sys/lib/libkern/softfloat.h Wed Sep 2 03:41:56 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: softfloat.h,v 1.5 2017/12/31 11:43:42 martin Exp $ */
+/* $NetBSD: softfloat.h,v 1.6 2020/09/02 03:41:56 thorpej Exp $ */
/* This is a derivative work. */
@@ -31,35 +31,29 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
-/*
-===============================================================================
+/*============================================================================
-This C header file is part of the SoftFloat IEC/IEEE Floating-point
-Arithmetic Package, Release 2a.
+This C header file template is part of the Berkeley SoftFloat IEEE Floating-
+Point Arithmetic Package, Release 2c, by John R. Hauser.
-Written by John R. Hauser. This work was made possible in part by the
-International Computer Science Institute, located at Suite 600, 1947 Center
-Street, Berkeley, California 94704. Funding was partially provided by the
-National Science Foundation under grant MIP-9311980. The original version
-of this code was written as part of a project to build a fixed-point vector
-processor in collaboration with the University of California at Berkeley,
-overseen by Profs. Nelson Morgan and John Wawrzynek. More information
-is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
-arithmetic/SoftFloat.html'.
-
-THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
-has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
-TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
-PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
-AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
-
-Derivative works are acceptable, even for commercial purposes, so long as
-(1) they include prominent notice that the work is derivative, and (2) they
-include prominent notice akin to these four paragraphs for those parts of
-this code that are retained.
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
+been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
+RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
+AND ORGANIZATIONS WHO CAN AND WILL TOLERATE ALL LOSSES, COSTS, OR OTHER
+PROBLEMS THEY INCUR DUE TO THE SOFTWARE WITHOUT RECOMPENSE FROM JOHN HAUSER OR
+THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE, AND WHO FURTHERMORE EFFECTIVELY
+INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE INSTITUTE
+(possibly via similar legal notice) AGAINST ALL LOSSES, COSTS, OR OTHER
+PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE, OR
+INCURRED BY ANYONE DUE TO A DERIVATIVE WORK THEY CREATE USING ANY PART OF THE
+SOFTWARE.
+
+Derivative works require also that (1) the source code for the derivative work
+includes prominent notice that the work is derivative, and (2) the source code
+includes prominent notice of these three paragraphs for those parts of this
+code that are retained.
-===============================================================================
-*/
+=============================================================================*/
#include <sys/types.h>
@@ -72,23 +66,19 @@ this code that are retained.
#endif
#include <sys/endian.h>
-/*
--------------------------------------------------------------------------------
-The macro `FLOATX80' must be defined to enable the extended double-precision
-floating-point format `floatx80'. If this macro is not defined, the
-`floatx80' type will not be defined, and none of the functions that either
-input or output the `floatx80' type will be defined. The same applies to
-the `FLOAT128' macro and the quadruple-precision format `float128'.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| The macro `FLOATX80' must be defined to enable the double-extended-precision
+| floating-point format `floatx80'. If this macro is not defined, the
+| `floatx80' type will not be defined, and none of the functions that either
+| input or output the `floatx80' type will be defined. The same applies to
+| the `FLOAT128' macro and the quadruple-precision format `float128'.
+*----------------------------------------------------------------------------*/
/* #define FLOATX80 */
/* #define FLOAT128 */
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE floating-point types.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE floating-point types.
+*----------------------------------------------------------------------------*/
typedef u_int32_t float32;
typedef u_int64_t float64;
#ifdef FLOATX80
@@ -116,24 +106,18 @@ typedef struct {
#define float_rounding_mode() fpgetround()
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE floating-point underflow tininess-detection mode.
--------------------------------------------------------------------------------
-*/
-
+/*----------------------------------------------------------------------------
+| Software IEEE floating-point underflow tininess-detection mode.
+*----------------------------------------------------------------------------*/
extern int float_detect_tininess;
enum {
float_tininess_after_rounding = 1,
float_tininess_before_rounding = 0
};
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE floating-point rounding mode.
--------------------------------------------------------------------------------
-*/
-
+/*----------------------------------------------------------------------------
+| Software IEEE floating-point rounding mode.
+*----------------------------------------------------------------------------*/
enum {
float_round_nearest_even = FP_RN,
float_round_to_zero = FP_RZ,
@@ -141,12 +125,9 @@ enum {
float_round_up = FP_RP
};
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE floating-point exception flags.
--------------------------------------------------------------------------------
-*/
-
+/*----------------------------------------------------------------------------
+| Software IEEE floating-point exception flags.
+*----------------------------------------------------------------------------*/
enum {
float_flag_inexact = FP_X_IMP,
float_flag_underflow = FP_X_UFL,
@@ -155,11 +136,21 @@ enum {
float_flag_invalid = FP_X_INV
};
+/*----------------------------------------------------------------------------
+| Routine to raise any or all of the software IEEE floating-point exception
+| flags.
+*----------------------------------------------------------------------------*/
/*
--------------------------------------------------------------------------------
-Software IEC/IEEE integer-to-floating-point conversion routines.
--------------------------------------------------------------------------------
-*/
+ * Routines provided by <machine/ieeefp.h>:
+ *
+ * float_raise()
+ * float_set_inexact()
+ * float_set_invalid()
+ */
+
+/*----------------------------------------------------------------------------
+| Software IEEE integer-to-floating-point conversion routines.
+*----------------------------------------------------------------------------*/
float32 int32_to_float32( int );
float64 int32_to_float64( int );
#ifdef FLOATX80
@@ -179,11 +170,9 @@ float128 int64_to_float128( int64_t );
#endif
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE single-precision conversion routines.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE single-precision conversion routines.
+*----------------------------------------------------------------------------*/
int float32_to_int32( float32 );
int float32_to_int32_round_to_zero( float32 );
#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */
@@ -198,11 +187,9 @@ floatx80 float32_to_floatx80( float32 );
float128 float32_to_float128( float32 );
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE single-precision operations.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE single-precision operations.
+*----------------------------------------------------------------------------*/
float32 float32_round_to_int( float32 );
float32 float32_add( float32, float32 );
float32 float32_sub( float32, float32 );
@@ -220,11 +207,9 @@ int float32_lt_quiet( float32, float32 )
int float32_is_signaling_nan( float32 );
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE double-precision conversion routines.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE double-precision conversion routines.
+*----------------------------------------------------------------------------*/
int float64_to_int32( float64 );
int float64_to_int32_round_to_zero( float64 );
#ifndef SOFTFLOAT_FOR_GCC /* __fix?fdi provided by libgcc2.c */
@@ -240,19 +225,31 @@ floatx80 float64_to_floatx80( float64 );
float128 float64_to_float128( float64 );
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE double-precision operations.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE double-precision operations.
+*----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+| The pattern for a default generated double-precision NaN.
+*----------------------------------------------------------------------------*/
#define float64_default_nan 0xFFF8000000000000LL
+/*----------------------------------------------------------------------------
+| Returns 1 if the double-precision floating-point value `a' is a NaN;
+| otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
static __inline int
float64_is_nan(float64 a)
{
return 0xFFE0000000000000LL < a << 1;
}
+/*----------------------------------------------------------------------------
+| Returns 1 if the double-precision floating-point value `a' is a signaling
+| NaN; otherwise returns 0.
+*----------------------------------------------------------------------------*/
+
static __inline int
float64_is_signaling_nan(float64 a)
{
@@ -278,11 +275,9 @@ int float64_is_signaling_nan( float64 );
#ifdef FLOATX80
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE extended double-precision conversion routines.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE double-extended-precision conversion routines.
+*----------------------------------------------------------------------------*/
int floatx80_to_int32( floatx80 );
int floatx80_to_int32_round_to_zero( floatx80 );
int64_t floatx80_to_int64( floatx80 );
@@ -293,19 +288,15 @@ float64 floatx80_to_float64( floatx80 );
float128 floatx80_to_float128( floatx80 );
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE extended double-precision rounding precision. Valid
-values are 32, 64, and 80.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE double-extended-precision rounding precision. Valid values
+| are 32, 64, and 80.
+*----------------------------------------------------------------------------*/
extern int floatx80_rounding_precision;
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE extended double-precision operations.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE double-extended-precision operations.
+*----------------------------------------------------------------------------*/
floatx80 floatx80_round_to_int( floatx80 );
floatx80 floatx80_add( floatx80, floatx80 );
floatx80 floatx80_sub( floatx80, floatx80 );
@@ -325,11 +316,9 @@ int floatx80_is_signaling_nan( floatx80
#ifdef FLOAT128
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE quadruple-precision conversion routines.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE quadruple-precision conversion routines.
+*----------------------------------------------------------------------------*/
int float128_to_int32( float128 );
int float128_to_int32_round_to_zero( float128 );
int64_t float128_to_int64( float128 );
@@ -340,11 +329,9 @@ float64 float128_to_float64( float128 );
floatx80 float128_to_floatx80( float128 );
#endif
-/*
--------------------------------------------------------------------------------
-Software IEC/IEEE quadruple-precision operations.
--------------------------------------------------------------------------------
-*/
+/*----------------------------------------------------------------------------
+| Software IEEE quadruple-precision operations.
+*----------------------------------------------------------------------------*/
float128 float128_round_to_int( float128 );
float128 float128_add( float128, float128 );
float128 float128_sub( float128, float128 );
