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f6ef0657e4
The powerpc64 versions of ceil, floor, round, trunc, rint, nearbyint and their float versions return sNaN for sNaN input when they should return qNaN. This patch fixes them to add a NaN argument to itself to quiet sNaNs before returning. Tested for powerpc64. [BZ #20160] * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Add NaN argument to itself before returning the result. * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_nearbyint.S (__nearbyint): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_nearbyintf.S (__nearbyintf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_rint.S (__rint): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_rintf.S (__rintf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_round.S (__round): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_roundf.S (__roundf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
80 lines
2.4 KiB
ArmAsm
80 lines
2.4 KiB
ArmAsm
/* trunc function. PowerPC64 version.
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Copyright (C) 2004-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <math_ldbl_opt.h>
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.section ".toc","aw"
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.LC0: /* 2**52 */
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.tc FD_43300000_0[TC],0x4330000000000000
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.section ".text"
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/* double [fp1] trunc (double x [fp1])
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IEEE 1003.1 trunc function. IEEE specifies "trunc to the integer
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value, in floating format, nearest to but no larger in magnitude
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then the argument."
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We set "round toward Zero" mode and trunc by adding +-2**52 then
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subtracting +-2**52. */
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EALIGN (__trunc, 4, 0)
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CALL_MCOUNT 0
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lfd fp13,.LC0@toc(2)
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fabs fp0,fp1
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fsub fp12,fp13,fp13 /* generate 0.0 */
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fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
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mffs fp11 /* Save current FPU rounding mode and
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"inexact" state. */
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fcmpu cr6,fp1,fp12 /* if (x > 0.0) */
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bnl- cr7,.L10
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mtfsfi 7,1 /* Set rounding toward 0 mode. */
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ble- cr6,.L4
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fadd fp1,fp1,fp13 /* x+= TWO52; */
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fsub fp1,fp1,fp13 /* x-= TWO52; */
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fabs fp1,fp1 /* if (x == 0.0) */
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/* x = 0.0; */
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mtfsf 0xff,fp11 /* Restore previous rounding mode and
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"inexact" state. */
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blr
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.L4:
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bge- cr6,.L9 /* if (x < 0.0) */
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fsub fp1,fp1,fp13 /* x-= TWO52; */
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fadd fp1,fp1,fp13 /* x+= TWO52; */
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fnabs fp1,fp1 /* if (x == 0.0) */
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/* x = -0.0; */
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.L9:
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mtfsf 0xff,fp11 /* Restore previous rounding mode and
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"inexact" state. */
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blr
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.L10:
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/* Ensure sNaN input is converted to qNaN. */
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fcmpu cr7,fp1,fp1
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beqlr cr7
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fadd fp1,fp1,fp1
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blr
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END (__trunc)
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weak_alias (__trunc, trunc)
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#ifdef NO_LONG_DOUBLE
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weak_alias (__trunc, truncl)
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strong_alias (__trunc, __truncl)
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#endif
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#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
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compat_symbol (libm, __trunc, truncl, GLIBC_2_1)
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#endif
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