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// *****************************************************************
//
// The Compcert verified compiler
//
// Xavier Leroy, INRIA Paris-Rocquencourt
// Prashanth Mundkur, SRI International
//
// Copyright (c) 2013 Institut National de Recherche en Informatique et
// en Automatique.
//
// The contributions by Prashanth Mundkur are reused and adapted
// under the terms of a Contributor License Agreement between
// SRI International and INRIA.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of the <organization> nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 <COPYRIGHT
// HOLDER> 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.
//
// *********************************************************************
// Helper functions for variadic functions <stdarg.h>. RISC-V version.
#include "sysdeps.h"
// typedef void * va_list;
// unsigned int __compcert_va_int32(va_list * ap);
// unsigned long long __compcert_va_int64(va_list * ap);
// double __compcert_va_float64(va_list * ap);
FUNCTION(__compcert_va_int32)
# a0 = ap parameter
lptr t5, 0(a0) # t5 = pointer to next argument
addi t5, t5, WORDSIZE # advance ap
sptr t5, 0(a0) # update ap
lw a0, -WORDSIZE(t5) # load it and return it in a0
jr ra
ENDFUNCTION(__compcert_va_int32)
FUNCTION(__compcert_va_int64)
# a0 = ap parameter
lptr t5, 0(a0) # t5 = pointer to next argument
addi t5, t5, 15 # 8-align and advance by 8
and t5, t5, -8
sptr t5, 0(a0) # update ap
#ifdef MODEL_64
ld a0, -8(t5) # return it in a0
#else
lw a0, -8(t5) # return it in [a0,a1]
lw a1, -4(t5)
#endif
jr ra
ENDFUNCTION(__compcert_va_int64)
FUNCTION(__compcert_va_float64)
# a0 = ap parameter
lptr t5, 0(a0) # t5 = pointer to next argument
addi t5, t5, 15 # 8-align and advance by 8
and t5, t5, -8
sw t5, 0(a0) # update ap
fld fa0, -8(t5) # return it in fa0
jr ra
ENDFUNCTION(__compcert_va_float64)
// Right now we pass structs by reference. This is not ABI conformant.
FUNCTION(__compcert_va_composite)
#ifdef MODEL_64
j __compcert_va_int64
#else
j __compcert_va_int32
#endif
ENDFUNCTION(__compcert_va_composite)
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