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/*
* Copyright (C) 2013 Andrew Turner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#ifndef AEABI_VFP_H
#define AEABI_VFP_H
#include <machine/acle-compat.h>
/*
* ASM helper macros. These allow the functions to be changed depending on
* the endian-ness we are building for.
*/
/* Allow the name of the function to be changed depending on the ABI */
#ifndef __ARM_PCS_VFP
#define AEABI_ENTRY(x) ENTRY(__aeabi_ ## x ## _vfp)
#define AEABI_END(x) END(__aeabi_ ## x ## _vfp)
#else
#define AEABI_ENTRY(x) ENTRY(__aeabi_ ## x)
#define AEABI_END(x) END(__aeabi_ ## x)
#endif
/*
* These should be used when a function either takes, or returns a floating
* point falue. They will load the data from an ARM to a VFP register(s),
* or from a VFP to an ARM register
*/
#ifdef __ARM_BIG_ENDIAN
#define LOAD_DREG(vreg, reg0, reg1) vmov vreg, reg1, reg0
#define UNLOAD_DREG(reg0, reg1, vreg) vmov reg1, reg0, vreg
#else
#define LOAD_DREG(vreg, reg0, reg1) vmov vreg, reg0, reg1
#define UNLOAD_DREG(reg0, reg1, vreg) vmov reg0, reg1, vreg
#endif
#define LOAD_SREGS(vreg0, vreg1, reg0, reg1) vmov vreg0, vreg1, reg0, reg1
#define LOAD_SREG(vreg, reg) vmov vreg, reg
#define UNLOAD_SREG(reg, vreg) vmov reg, vreg
/*
* C Helper macros
*/
#if __ARM_ARCH >= 6
/*
* Generate a function that will either call into the VFP implementation,
* or the soft float version for a given __aeabi_* helper. The function
* will take a single argument of the type given by in_type.
*/
#define AEABI_FUNC(name, in_type, soft_func) \
__aeabi_ ## name(in_type a) \
{ \
if (_libc_arm_fpu_present) \
return __aeabi_ ## name ## _vfp(a); \
else \
return soft_func (a); \
}
/* As above, but takes two arguments of the same type */
#define AEABI_FUNC2(name, in_type, soft_func) \
__aeabi_ ## name(in_type a, in_type b) \
{ \
if (_libc_arm_fpu_present) \
return __aeabi_ ## name ## _vfp(a, b); \
else \
return soft_func (a, b); \
}
/* As above, but with the soft float arguments reversed */
#define AEABI_FUNC2_REV(name, in_type, soft_func) \
__aeabi_ ## name(in_type a, in_type b) \
{ \
if (_libc_arm_fpu_present) \
return __aeabi_ ## name ## _vfp(a, b); \
else \
return soft_func (b, a); \
}
#else
/*
* Helper macros for when we are only able to use the softfloat
* version of these functions, i.e. on arm before armv6.
*/
#define AEABI_FUNC(name, in_type, soft_func) \
__aeabi_ ## name(in_type a) \
{ \
return soft_func (a); \
}
/* As above, but takes two arguments of the same type */
#define AEABI_FUNC2(name, in_type, soft_func) \
__aeabi_ ## name(in_type a, in_type b) \
{ \
return soft_func (a, b); \
}
/* As above, but with the soft float arguments reversed */
#define AEABI_FUNC2_REV(name, in_type, soft_func) \
__aeabi_ ## name(in_type a, in_type b) \
{ \
return soft_func (b, a); \
}
#endif
#endif
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