37 lines
863 B
Markdown
37 lines
863 B
Markdown
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# complex
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Demonstrates how to access complex types in `avo`.
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The `Real()` and `Imag()` parameter methods may be used to load the sub-components of complex arguments. The following function uses these to implement the [complex norm](http://mathworld.wolfram.com/ComplexModulus.html).
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[embedmd]:# (asm.go go /.*TEXT.*Norm/ /RET.*/)
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```go
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TEXT("Norm", "func(z complex128) float64")
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Doc("Norm returns the complex norm of z.")
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r = Load(Param("z").Real(), Xv())
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i = Load(Param("z").Imag(), Xv())
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MULSD(r, r)
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MULSD(i, i)
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ADDSD(i, r)
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n := Xv()
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SQRTSD(r, n)
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Store(n, ReturnIndex(0))
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RET()
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```
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Generated assembly:
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[embedmd]:# (complex.s s /.*func Norm/ /RET/)
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```s
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// func Norm(z complex128) float64
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TEXT ·Norm(SB), $0-24
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MOVSD z_real(FP), X0
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MOVSD z_imag+8(FP), X1
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MULSD X0, X0
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MULSD X1, X1
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ADDSD X1, X0
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SQRTSD X0, X2
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MOVSD X2, ret+16(FP)
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RET
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```
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