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/* Copyright (c) 2020 Kalray
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
#if defined(__kvx__)
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
#include <ffi_cfi.h>
#include <kvx/asm.h>
.text
.global ffi_call_SYSV
.type ffi_call_SYSV, @function
.type ffi_prep_args, @function
.align 8
/* ffi_call_SYSV
r0: total size to allocate on stack
r1: size of arg slots
r2: extended cif structure, DO NOT REMOVE: it is used by ffi_prep_args()
r3: return value address
r4: function to call
r5: integer sign extension method to be used
*/
ffi_call_SYSV:
addd $r12 = $r12, -64
so (-32)[$r12] = $r20r21r22r23
;;
sd (0)[$r12] = $r24
;;
get $r23 = $ra
copyd $r20 = $r12
sbfd $r12 = $r0, $r12
;;
copyd $r0 = $r12
copyd $r21 = $r3
copyd $r22 = $r4
copyd $r24 = $r5
call ffi_prep_args
;;
lo $r8r9r10r11 = (64)[$r12]
;;
lo $r4r5r6r7 = (32)[$r12]
;;
lo $r0r1r2r3 = (0)[$r12]
copyd $r12 = $r0
/* $r15 is the register used by the ABI to return big (>32 bytes)
* structs by value.
* It is also referred to as the "struct register" in the ABI.
*/
copyd $r15 = $r21
icall $r22
;;
pcrel $r4 = @pcrel(.Ltable)
cb.deqz $r24 ? .Lend
;;
addx8d $r24 = $r24, $r4
;;
igoto $r24
;;
.Ltable:
0: /* we should never arrive here */
goto .Lerror
nop
;;
1: /* Sign extend byte to double */
sxbd $r0 = $r0
goto .Lend
;;
2: /* Sign extend half to double */
sxhd $r0 = $r0
goto .Lend
;;
3: /* Sign extend word to double */
sxwd $r0 = $r0
goto .Lend
;;
4: /* Zero extend byte to double */
zxbd $r0 = $r0
goto .Lend
;;
5: /* Zero extend half to double */
zxhd $r0 = $r0
goto .Lend
;;
6: /* Zero extend word to double */
zxwd $r0 = $r0
/* Fallthrough to .Lend */
;;
.Lend:
ld $r24 = (0)[$r12]
;;
set $ra = $r23
lo $r20r21r22r23 = (32)[$r20]
addd $r12 = $r20, 64
;;
ret
;;
.Lerror:
errop
;;
#endif /* __kvx__ */
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",%progbits
#endif
|
