602bb5197c
The Context.Label method and LABEL global function did not agree. Also breaks the convention I'd like to set that capitalized functions must agree with existing Go assembly syntax. To help avoid a conflict with `avo.Label`, attributes were moved to their own package. Fixes #35
29 lines
524 B
Go
29 lines
524 B
Go
// +build ignore
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package main
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import (
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. "github.com/mmcloughlin/avo/build"
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. "github.com/mmcloughlin/avo/operand"
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)
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func main() {
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TEXT("Sum", "func(xs []uint64) uint64")
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Doc("Sum returns the sum of the elements in xs.")
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ptr := Load(Param("xs").Base(), GP64())
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n := Load(Param("xs").Len(), GP64())
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s := GP64()
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XORQ(s, s)
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Label("loop")
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CMPQ(n, Imm(0))
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JE(LabelRef("done"))
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ADDQ(Mem{Base: ptr}, s)
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ADDQ(Imm(8), ptr)
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DECQ(n)
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JMP(LabelRef("loop"))
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Label("done")
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Store(s, ReturnIndex(0))
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RET()
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Generate()
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}
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