161fedb9cc
By Richard Earnshaw at ARM > >GCC has for a number of years provides a set of pre-defined macros for >use with determining the ISA and features of the target during >pre-processing. However, the design was always somewhat cumbersome in >that each new architecture revision created a new define and then >removed the previous one. This meant that it was necessary to keep >updating the support code simply to recognise a new architecture being >added. > >The ACLE specification (ARM C Language Extentions) >(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.set.swdev/index.html) >provides a much more suitable interface and GCC has supported this >since gcc-4.8. > >This patch makes use of the ACLE pre-defines to map to the internal >feature definitions. To support older versions of GCC a compatibility >header is provided that maps the traditional pre-defines onto the new >ACLE ones. Stop using __FreeBSD_ARCH_armv6__ and switch to __ARM_ARCH >= 6 in the couple of places in tree. clang already implements ACLE. Add a define that says we implement version 1.1, even though the implementation isn't quite complete.
132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/*
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* Copyright (C) 2013 Andrew Turner
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#ifndef AEABI_VFP_H
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#define AEABI_VFP_H
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#include <machine/acle-compat.h>
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/*
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* ASM helper macros. These allow the functions to be changed depending on
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* the endian-ness we are building for.
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*/
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/* Allow the name of the function to be changed depending on the ABI */
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#ifndef __ARM_PCS_VFP
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#define AEABI_ENTRY(x) ENTRY(__aeabi_ ## x ## _vfp)
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#define AEABI_END(x) END(__aeabi_ ## x ## _vfp)
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#else
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#define AEABI_ENTRY(x) ENTRY(__aeabi_ ## x)
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#define AEABI_END(x) END(__aeabi_ ## x)
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#endif
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/*
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* These should be used when a function either takes, or returns a floating
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* point falue. They will load the data from an ARM to a VFP register(s),
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* or from a VFP to an ARM register
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*/
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#ifdef __ARM_BIG_ENDIAN
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#define LOAD_DREG(vreg, reg0, reg1) vmov vreg, reg1, reg0
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#define UNLOAD_DREG(reg0, reg1, vreg) vmov reg1, reg0, vreg
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#else
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#define LOAD_DREG(vreg, reg0, reg1) vmov vreg, reg0, reg1
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#define UNLOAD_DREG(reg0, reg1, vreg) vmov reg0, reg1, vreg
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#endif
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#define LOAD_SREGS(vreg0, vreg1, reg0, reg1) vmov vreg0, vreg1, reg0, reg1
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#define LOAD_SREG(vreg, reg) vmov vreg, reg
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#define UNLOAD_SREG(reg, vreg) vmov reg, vreg
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/*
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* C Helper macros
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*/
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#if __ARM_ARCH >= 6
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/*
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* Generate a function that will either call into the VFP implementation,
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* or the soft float version for a given __aeabi_* helper. The function
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* will take a single argument of the type given by in_type.
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*/
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#define AEABI_FUNC(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a) \
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{ \
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if (_libc_arm_fpu_present) \
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return __aeabi_ ## name ## _vfp(a); \
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else \
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return soft_func (a); \
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}
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/* As above, but takes two arguments of the same type */
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#define AEABI_FUNC2(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a, in_type b) \
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{ \
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if (_libc_arm_fpu_present) \
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return __aeabi_ ## name ## _vfp(a, b); \
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else \
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return soft_func (a, b); \
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}
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/* As above, but with the soft float arguments reversed */
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#define AEABI_FUNC2_REV(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a, in_type b) \
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{ \
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if (_libc_arm_fpu_present) \
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return __aeabi_ ## name ## _vfp(a, b); \
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else \
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return soft_func (b, a); \
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}
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#else
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/*
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* Helper macros for when we are only able to use the softfloat
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* version of these functions, i.e. on arm before armv6.
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*/
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#define AEABI_FUNC(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a) \
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{ \
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return soft_func (a); \
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}
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/* As above, but takes two arguments of the same type */
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#define AEABI_FUNC2(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a, in_type b) \
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{ \
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return soft_func (a, b); \
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}
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/* As above, but with the soft float arguments reversed */
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#define AEABI_FUNC2_REV(name, in_type, soft_func) \
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__aeabi_ ## name(in_type a, in_type b) \
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{ \
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return soft_func (b, a); \
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}
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#endif
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#endif
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