29 lines
776 B
ArmAsm
29 lines
776 B
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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// func cleanAdd(a, b int64) int64
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// A well-behaved function that preserves all callee-saved registers.
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TEXT ·cleanAdd(SB), NOSPLIT, $0-24
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MOVQ a+0(FP), AX
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ADDQ b+8(FP), AX
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MOVQ AX, ret+16(FP)
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RET
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// func dirtyBP(a int64) int64
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// Deliberately clobbers BP (an ABI violation for a NOSPLIT frame=0 function).
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TEXT ·dirtyBP(SB), NOSPLIT, $0-16
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MOVQ $0x1234, BP
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MOVQ a+0(FP), AX
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MOVQ AX, ret+8(FP)
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RET
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// func dirtyR14(a int64) int64
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// Deliberately clobbers R14 (the goroutine pointer — a serious ABI violation).
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TEXT ·dirtyR14(SB), NOSPLIT, $0-16
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MOVQ $0x5678, R14
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MOVQ a+0(FP), AX
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MOVQ AX, ret+8(FP)
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RET
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