glibc/soft-fp/gesf2.c
Joseph Myers 73e28d9c88 soft-fp: Refactor exception handling for comparisons.
This patch refactors how soft-fp comparisons handle setting exceptions
for NaN operands, so that exceptions are set through the FP_CMP macros
rather than directly in the C files calling them.

The _FP_CMP* and FP_CMP* macros gain an extra argument to specify when
exceptions should be set, 0 for no exception setting (I'm not sure
this is actually needed - at least it's not needed for IEEE operations
in glibc / libgcc, but might be relevant in some cases for kernel
use), 1 for exceptions only for signaling NaNs and 2 for exceptions
for all NaNs.  This argument is handled through _FP_CMP_CHECK_NAN,
newly called by the _FP_CMP* macros when a NaN is encountered.  Calls
to these macros are updated, which eliminates all the existing
checking and exception setting in soft-fp *.c files in glibc.

Tested for powerpc-nofpu.  (The __unord* functions have no code
changes; the __eq* / __ge* / __le* functions get slightly larger, but
I don't think that's significant.)

	* soft-fp/op-common.h (_FP_CMP_CHECK_NAN): New macro.
	(_FP_CMP): Add extra argument EX.  Call _FP_CMP_CHECK_NAN.
	(_FP_CMP_EQ): Likewise.
	(_FP_CMP_UNORD): Likewise.
	* soft-fp/double.h (FP_CMP_D): Add extra argument EX.
	(FP_CMP_EQ_D): Likewise.
	(FP_CMP_UNORD_D): Likewise.
	* soft-fp/extended.h (FP_CMP_E): Likewise.
	(FP_CMP_EQ_E): Likewise.
	(FP_CMP_UNORD_E): Likewise.
	* soft-fp/quad.h (FP_CMP_Q): Likewise.
	(FP_CMP_EQ_Q): Likewise.
	(FP_CMP_UNORD_Q): Likewise.
	* soft-fp/single.h (FP_CMP_S): Likewise.
	(FP_CMP_EQ_S): Likewise.
	(FP_CMP_UNORD_S): Likewise.
	* soft-fp/eqdf2.c (__eqdf2): Update call to FP_CMP_EQ_D.
	* soft-fp/eqsf2.c (__eqsf2): Update call to FP_CMP_EQ_S.
	* soft-fp/eqtf2.c (__eqtf2): Update call to FP_CMP_EQ_Q.
	* soft-fp/gedf2.c (__gedf2): Update call to FP_CMP_D.
	* soft-fp/gesf2.c (__gesf2): Update call to FP_CMP_S.
	* soft-fp/getf2.c (__getf2): Update call to FP_CMP_Q.
	* soft-fp/ledf2.c (__ledf2): Update call to FP_CMP_D.
	* soft-fp/lesf2.c (__lesf2): Update call to FP_CMP_S.
	* soft-fp/letf2.c (__letf2): Update call to FP_CMP_Q.
	* soft-fp/unorddf2.c (__unorddf2): Update call to FP_CMP_UNORD_D.
	* soft-fp/unordsf2.c (__unordsf2): Update call to FP_CMP_UNORD_S.
	* soft-fp/unordtf2.c (__unordtf2): Update call to FP_CMP_UNORD_Q.
	* sysdeps/alpha/soft-fp/ots_cmpe.c (internal_compare): Update call
	to FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmp.c (_Q_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_cmpe.c (_Q_cmpe): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_feq.c (_Q_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fge.c (_Q_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc32/soft-fp/q_fgt.c (_Q_fgt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fle.c (_Q_fle): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_flt.c (_Q_flt): Likewise.
	* sysdeps/sparc/sparc32/soft-fp/q_fne.c (_Q_fne): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmp.c (_Qp_cmp): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_cmpe.c (_Qp_cmpe): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_feq.c (_Qp_feq): Update call to
	FP_CMP_EQ_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fge.c (_Qp_fge): Update call to
	FP_CMP_Q.
	* sysdeps/sparc/sparc64/soft-fp/qp_fgt.c (_Qp_fgt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fle.c (_Qp_fle): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_flt.c (_Qp_flt): Likewise.
	* sysdeps/sparc/sparc64/soft-fp/qp_fne.c (_Qp_fne): Update call to
	FP_CMP_EQ_Q.
2014-10-09 01:03:56 +00:00

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1.8 KiB
C

/* Software floating-point emulation.
Return 0 iff a == b, 1 iff a > b, -2 iff a ? b, -1 iff a < b
Copyright (C) 1997-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@cygnus.com) and
Jakub Jelinek (jj@ultra.linux.cz).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file into
combinations with other programs, and to distribute those
combinations without any restriction coming from the use of this
file. (The Lesser General Public License restrictions do apply in
other respects; for example, they cover modification of the file,
and distribution when not linked into a combine executable.)
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "soft-fp.h"
#include "single.h"
CMPtype
__gesf2 (SFtype a, SFtype b)
{
FP_DECL_EX;
FP_DECL_S (A);
FP_DECL_S (B);
CMPtype r;
FP_INIT_EXCEPTIONS;
FP_UNPACK_RAW_S (A, a);
FP_UNPACK_RAW_S (B, b);
FP_CMP_S (r, A, B, -2, 2);
FP_HANDLE_EXCEPTIONS;
return r;
}
strong_alias (__gesf2, __gtsf2);