[444] | 1 | /* or1k-asm.h -- OR1K assembly helper macros |
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| 2 | |
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| 3 | Copyright (c) 2014 OpenRISC Project Maintainers |
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| 4 | Copyright (C) 2012-2014 Peter Gavin <pgavin@gmail.com> |
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| 5 | All rights reserved. |
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| 6 | |
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| 7 | Redistribution and use in source and binary forms, with or without |
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| 8 | modification, are permitted provided that the following condition |
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| 9 | is met: |
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| 10 | |
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| 11 | 1. Redistributions of source code must retain the above copyright |
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| 12 | notice, this list of conditions and the following disclaimer. |
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| 13 | |
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| 14 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 15 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 16 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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| 18 | COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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| 19 | INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 20 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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| 21 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 22 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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| 23 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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| 25 | OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 26 | |
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| 27 | */ |
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| 28 | |
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| 29 | #ifndef OR1K_ASM_H |
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| 30 | #define OR1K_ASM_H |
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| 31 | |
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| 32 | /* The purpose of the OR1K_INST macro is simply to protect the commas |
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| 33 | embedded within an instruction from the C preprocessor. An entire |
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| 34 | instruction can be safely embedded within its arguments, including |
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| 35 | an arbitrary number of commas, and it will be reproduced |
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| 36 | exactly. */ |
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| 37 | #define OR1K_INST(...) __VA_ARGS__ |
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| 38 | |
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| 39 | /* OR1K_DELAYED takes two arguments which must be instructions. They |
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| 40 | should be wrapped in OR1K_INST if the instructions require commas. |
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| 41 | The second argument should be a jump or branch instruction. If we |
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| 42 | are assembling the code in delay-slot mode (e.g., for the standard |
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| 43 | OR1K) the first instruction will be emitted in the delay slot of |
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| 44 | the second instruction. In no-delay-slot mode they will be emitted |
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| 45 | in order. If we are using compat-delay mode, they will be emitted |
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| 46 | in order, but an l.nop instruction will be emitted immediately |
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| 47 | after. */ |
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| 48 | |
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| 49 | /* OR1K_DELAYED_NOP takes a single argument, which should be a |
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| 50 | branch/jump instruction. In delay-slot or compat-delay modes, the |
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| 51 | instruction will be emitted with an l.nop in its delay slot. In |
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| 52 | no-delay mode, the instruction will be emitted by itself. */ |
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| 53 | |
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| 54 | #if defined(__OR1K_NODELAY__) |
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| 55 | |
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| 56 | #define OR1K_DELAYED(a, b) a; b |
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| 57 | #define OR1K_DELAYED_NOP(a) a |
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| 58 | |
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| 59 | /* Go ahead and emit the .nodelay directive when in no-delay mode, so |
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| 60 | that the flags are appropriately set in the binary. */ |
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| 61 | .nodelay |
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| 62 | |
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| 63 | #elif defined(__OR1K_DELAY__) |
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| 64 | |
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| 65 | #define OR1K_DELAYED(a, b) b; a |
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| 66 | #define OR1K_DELAYED_NOP(a) a; l.nop |
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| 67 | |
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| 68 | #elif defined(__OR1K_DELAY_COMPAT__) |
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| 69 | |
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| 70 | #define OR1K_DELAYED(a, b) a; b; l.nop |
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| 71 | #define OR1K_DELAYED_NOP(a) a; l.nop |
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| 72 | |
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| 73 | #else |
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| 74 | |
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| 75 | #error One of __OR1K_NODELAY__, __OR1K_DELAY__, or __OR1K_DELAY_COMPAT__ must be defined |
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| 76 | |
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| 77 | #endif |
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| 78 | |
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| 79 | #define LOAD_SYMBOL_2_GPR(gpr,symbol) \ |
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| 80 | .global symbol ; \ |
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| 81 | l.movhi gpr, hi(symbol) ; \ |
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| 82 | l.ori gpr, gpr, lo(symbol) |
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| 83 | #endif |
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