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; Copyright (C) 2012-2018 Free Software Foundation, Inc.
; Contributed by Red Hat.
;
; This file is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 3, or (at your option) any
; later version.
;
; This file 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
; General Public License for more details.
;
; Under Section 7 of GPL version 3, you are granted additional
; permissions described in the GCC Runtime Library Exception, version
; 3.1, as published by the Free Software Foundation.
;
; You should have received a copy of the GNU General Public License and
; a copy of the GCC Runtime Library Exception along with this program;
; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
; <http://www.gnu.org/licenses/>.
#include "vregs.h"
;; int signbitf (float X)
;; int signbit (double X)
;; int signbitl (long double X)
;;
;; `signbit' returns a nonzero value if the value of X has its sign
;; bit set.
;;
;; This is not the same as `x < 0.0', because IEEE 754 floating point
;; allows zero to be signed. The comparison `-0.0 < 0.0' is false,
;; but `signbit (-0.0)' will return a nonzero value.
;----------------------------------------------------------------------
.text
START_FUNC _signbit
START_ANOTHER_FUNC _signbitf
;; X is at [sp+4]..[SP+7]
;; result is in R8..R9
movw r8, #0
mov a, [sp+7]
mov1 cy, a.7
sknc
movw r8, #1
ret
END_ANOTHER_FUNC _signbitf
END_FUNC _signbit
START_FUNC _signbitl
;; X is at [sp+4]..[SP+7]
;; result is in R8..R9
movw r8, #0
mov a, [sp+11]
mov1 cy, a.7
sknc
movw r8, #1
ret
END_FUNC _signbitl
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