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re PR libquadmath/81848 (Add PowerPC support to libquadmath)

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2017-09-01  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR libquadmath/81848
	* configure.ac (powerpc*-linux*): Use attribute mode KC to create
	complex __float128 on PowerPC instead of attribute mode TC.
	* quadmath.h (__complex128): Likewise.
	* configure: Regenerate.
	* math/cbrtq.c (CBRT2): Use __float128 not long double.
	(CBRT4): Likewise.
	(CBRT2I): Likewise.
	(CBRT4I): Likewise.
	* math/j0q.c (U0): Likewise.
	* math/sqrtq.c (sqrtq): Don't depend on implicit conversion
	between __float128, instead explicitly convert the __float128
	value to long double because the PowerPC does not allow __float128
	and long double in the same expression.

From-SVN: r251613
This commit is contained in:
Michael Meissner 2017-09-01 22:10:57 +00:00 committed by Michael Meissner
parent fe920c2d9f
commit 0c949f0a1c
7 changed files with 47 additions and 11 deletions
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17
libquadmath/ChangeLog
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@ -1,3 +1,20 @@
2017-09-01 Michael Meissner <meissner@linux.vnet.ibm.com>
PR libquadmath/81848
* configure.ac (powerpc*-linux*): Use attribute mode KC to create
complex __float128 on PowerPC instead of attribute mode TC.
* quadmath.h (__complex128): Likewise.
* configure: Regenerate.
* math/cbrtq.c (CBRT2): Use __float128 not long double.
(CBRT4): Likewise.
(CBRT2I): Likewise.
(CBRT4I): Likewise.
* math/j0q.c (U0): Likewise.
* math/sqrtq.c (sqrtq): Don't depend on implicit conversion
between __float128, instead explicitly convert the __float128
value to long double because the PowerPC does not allow __float128
and long double in the same expression.
2017-07-19 Gerald Pfeifer <gerald@pfeifer.com>
* math/powq.c (powq): Use uint32_t instead of u_int32_t.

8
libquadmath/configure vendored
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@ -12516,7 +12516,11 @@ else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
typedef _Complex float __attribute__((mode(TC))) __complex128;
#else
typedef _Complex float __attribute__((mode(KC))) __complex128;
#endif
__float128 foo (__float128 x)
{
@ -12563,7 +12567,11 @@ fi
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
typedef _Complex float __attribute__((mode(TC))) __complex128;
#else
typedef _Complex float __attribute__((mode(KC))) __complex128;
#endif
__float128 foo (__float128 x)
{

4
libquadmath/configure.ac
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@ -210,7 +210,11 @@ AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
[GCC_TRY_COMPILE_OR_LINK([
#if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
typedef _Complex float __attribute__((mode(TC))) __complex128;
#else
typedef _Complex float __attribute__((mode(KC))) __complex128;
#endif
__float128 foo (__float128 x)
{

8
libquadmath/math/cbrtq.c
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@ -56,10 +56,10 @@ Adapted for glibc October, 2001.
#include "quadmath-imp.h"
static const long double CBRT2 = 1.259921049894873164767210607278228350570251Q;
static const long double CBRT4 = 1.587401051968199474751705639272308260391493Q;
static const long double CBRT2I = 0.7937005259840997373758528196361541301957467Q;
static const long double CBRT4I = 0.6299605249474365823836053036391141752851257Q;
static const __float128 CBRT2 = 1.259921049894873164767210607278228350570251Q;
static const __float128 CBRT4 = 1.587401051968199474751705639272308260391493Q;
static const __float128 CBRT2I = 0.7937005259840997373758528196361541301957467Q;
static const __float128 CBRT4I = 0.6299605249474365823836053036391141752851257Q;
__float128

2
libquadmath/math/j0q.c
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@ -816,7 +816,7 @@ static __float128 Y0_2D[NY0_2D + 1] = {
/* 1.000000000000000000000000000000000000000E0 */
};
static const long double U0 = -7.3804295108687225274343927948483016310862e-02Q;
static const __float128 U0 = -7.3804295108687225274343927948483016310862e-02Q;
/* Bessel function of the second kind, order zero. */

15
libquadmath/math/sqrtq.c
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@ -32,14 +32,17 @@ sqrtq (const __float128 x)
}
#ifdef HAVE_SQRTL
if (x <= LDBL_MAX && x >= LDBL_MIN)
{
/* Use long double result as starting point. */
y = sqrtl ((long double) x);
long double xl = (long double) x;
if (xl <= LDBL_MAX && xl >= LDBL_MIN)
{
/* Use long double result as starting point. */
y = (__float128) sqrtl (xl);
/* One Newton iteration. */
y -= 0.5q * (y - x / y);
return y;
/* One Newton iteration. */
y -= 0.5q * (y - x / y);
return y;
}
}
#endif

4
libquadmath/quadmath.h
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@ -29,7 +29,11 @@ extern "C" {
/* Define the complex type corresponding to __float128
("_Complex __float128" is not allowed) */
#if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
typedef _Complex float __attribute__((mode(TC))) __complex128;
#else
typedef _Complex float __attribute__((mode(KC))) __complex128;
#endif
#ifdef __cplusplus
# define __quadmath_throw throw ()