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https://github.com/golang/go
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879a1ff1e4
asmcheck comments now support a compact form of specifying
multiple checks for each platform, using the following syntax:
amd64:"SHL\t[$]4","SHR\t[$]4"
Negative checks are also parsed using the following syntax:
amd64:-"ROR"
though they are still not working.
Moreover, out-of-line comments have been implemented. This
allows to specify asmchecks on comment-only lines, that will
be matched on the first subsequent non-comment non-empty line.
// amd64:"XOR"
// arm:"EOR"
x ^= 1
Change-Id: I110c7462fc6a5c70fd4af0d42f516016ae7f2760
Reviewed-on: https://go-review.googlesource.com/97816
Reviewed-by: Keith Randall <khr@golang.org>
28 lines
619 B
Go
28 lines
619 B
Go
// asmcheck
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package codegen
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import "math"
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func rot32(x uint32) uint32 {
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var a uint32
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a += x<<7 | x>>25 // amd64:"ROLL.*[$]7" arm:"MOVW.*@>25"
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a += x<<8 + x>>24 // amd64:`ROLL.*\$8` arm:"MOVW.*@>24"
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a += x<<9 ^ x>>23 // amd64:"ROLL.*\\$9" arm:"MOVW.*@>23"
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return a
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}
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func rot64(x uint64) uint64 {
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var a uint64
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a += x<<7 | x>>57 // amd64:"ROL"
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a += x<<8 + x>>56 // amd64:"ROL"
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a += x<<9 ^ x>>55 // amd64:"ROL"
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return a
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}
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func copysign(a, b float64) float64 {
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// amd64:"SHLQ\t[$]1","SHRQ\t[$]1","SHRQ\t[$]63","SHLQ\t[$]63","ORQ"
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// ppc64le:"FCPSGN" s390x:"CPSDR",-"MOVD"
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return math.Copysign(a, b)
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}
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