84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
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/* or1k-asm.h -- OR1K assembly helper macros
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Copyright (c) 2014 OpenRISC Project Maintainers
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Copyright (C) 2012-2014 Peter Gavin <pgavin@gmail.com>
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All rights reserved.
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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 condition
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is 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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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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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,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OR1K_ASM_H
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#define OR1K_ASM_H
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/* The purpose of the OR1K_INST macro is simply to protect the commas
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embedded within an instruction from the C preprocessor. An entire
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instruction can be safely embedded within its arguments, including
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an arbitrary number of commas, and it will be reproduced
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exactly. */
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#define OR1K_INST(...) __VA_ARGS__
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/* OR1K_DELAYED takes two arguments which must be instructions. They
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should be wrapped in OR1K_INST if the instructions require commas.
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The second argument should be a jump or branch instruction. If we
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are assembling the code in delay-slot mode (e.g., for the standard
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OR1K) the first instruction will be emitted in the delay slot of
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the second instruction. In no-delay-slot mode they will be emitted
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in order. If we are using compat-delay mode, they will be emitted
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in order, but an l.nop instruction will be emitted immediately
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after. */
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/* OR1K_DELAYED_NOP takes a single argument, which should be a
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branch/jump instruction. In delay-slot or compat-delay modes, the
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instruction will be emitted with an l.nop in its delay slot. In
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no-delay mode, the instruction will be emitted by itself. */
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#if defined(__OR1K_NODELAY__)
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#define OR1K_DELAYED(a, b) a; b
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#define OR1K_DELAYED_NOP(a) a
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/* Go ahead and emit the .nodelay directive when in no-delay mode, so
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that the flags are appropriately set in the binary. */
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.nodelay
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#elif defined(__OR1K_DELAY__)
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#define OR1K_DELAYED(a, b) b; a
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#define OR1K_DELAYED_NOP(a) a; l.nop
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#elif defined(__OR1K_DELAY_COMPAT__)
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#define OR1K_DELAYED(a, b) a; b; l.nop
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#define OR1K_DELAYED_NOP(a) a; l.nop
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#else
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#error One of __OR1K_NODELAY__, __OR1K_DELAY__, or __OR1K_DELAY_COMPAT__ must be defined
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#endif
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#define LOAD_SYMBOL_2_GPR(gpr,symbol) \
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.global symbol ; \
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l.movhi gpr, hi(symbol) ; \
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l.ori gpr, gpr, lo(symbol)
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#endif
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