arm64/fp/assembler.h

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 // Copyright (C) 2015-2019 ARM Limited.
0003 // Original author: Dave Martin <Dave.Martin@arm.com>
0004
0005 #ifndef ASSEMBLER_H
0006 #define ASSEMBLER_H
0007
0008 .macro __for from:req, to:req
0009     .if (\from) == (\to)
0010         _for__body %\from
0011     .else
0012         __for \from, %(\from) + ((\to) - (\from)) / 2
0013         __for %(\from) + ((\to) - (\from)) / 2 + 1, \to
0014     .endif
0015 .endm
0016
0017 .macro _for var:req, from:req, to:req, insn:vararg
0018     .macro _for__body \var:req
0019         .noaltmacro
0020         \insn
0021         .altmacro
0022     .endm
0023
0024     .altmacro
0025     __for \from, \to
0026     .noaltmacro
0027
0028     .purgem _for__body
0029 .endm
0030
0031 .macro function name
0032     .macro endfunction
0033         .type \name, @function
0034         .purgem endfunction
0035     .endm
0036 \name:
0037 .endm
0038
0039 .macro define_accessor name, num, insn
0040     .macro \name\()_entry n
0041         \insn \n, 1
0042         ret
0043     .endm
0044
0045 function \name
0046     adr x2, .L__accessor_tbl\@
0047     add x2, x2, x0, lsl #3
0048     br  x2
0049
0050 .L__accessor_tbl\@:
0051     _for x, 0, (\num) - 1, \name\()_entry \x
0052 endfunction
0053
0054     .purgem \name\()_entry
0055 .endm
0056
0057 // Utility macro to print a literal string
0058 // Clobbers x0-x4,x8
0059 .macro puts string
0060     .pushsection .rodata.str1.1, "aMS", 1
0061 .L__puts_literal\@: .string "\string"
0062     .popsection
0063
0064     ldr x0, =.L__puts_literal\@
0065     bl  puts
0066 .endm
0067
0068 #endif /* ! ASSEMBLER_H */