58 lines
1.0 KiB
ArmAsm
58 lines
1.0 KiB
ArmAsm
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// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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#include "textflag.h"
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// add returns a + b.
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TEXT ·add(SB), NOSPLIT, $0-24
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MOVD a+0(FP), R4
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MOVD b+8(FP), R5
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ADD R5, R4, R4
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MOVD R4, ret+16(FP)
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RET
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// arith exercises the register-register integer set.
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TEXT ·arith(SB), NOSPLIT, $0-0
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ADD R4, R5, R6
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SUB R7, R8, R9
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AND R10, R11, R12
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ORR R12, R13, R14
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EOR R14, R15, R16
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CMP R16, R17
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ADD R4, R5
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SUB R6, R7
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RET
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// branch exercises conditional and unconditional control flow.
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TEXT ·branch(SB), NOSPLIT, $0-0
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BEQ done
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BNE skip
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BGE done
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BLT done
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BGT done
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BLE done
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skip:
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B loop
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loop:
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ADD R4, R5
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RET
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done:
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RET
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// mov exercises the MOV pseudo-instruction.
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TEXT ·mov(SB), NOSPLIT, $0-16
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MOVD $0, R4
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MOVD $1, R5
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MOVD $42, R6
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MOVD a+0(FP), R7
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MOVD R7, ret+0(FP)
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MOVW $100, R8
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RET
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// frame exercises the prologue/epilogue of a function with a real frame.
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TEXT ·frame(SB), NOSPLIT, $32-8
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MOVD arg+0(FP), R4
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ADD $1, R4, R4
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MOVD R4, ret+0(FP)
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RET
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