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cpu: detect RDRAND and RDSEED instructions on x86

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Change-Id: I2d0094d64ba12f888758aeebdb43aed353ddeeb9
Reviewed-on: https://go-review.googlesource.com/c/160577
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2019-02-01 07:34:06 +00:00
committed by Tobias Klauser
parent aca44879d5
commit 2970a3744d
2 changed files with 4 additions and 0 deletions
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cpu/cpu_x86.go
+2
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@@ -27,6 +27,7 @@ func init() {
X86.HasPOPCNT = isSet(23, ecx1)
X86.HasAES = isSet(25, ecx1)
X86.HasOSXSAVE = isSet(27, ecx1)
X86.HasRDRAND = isSet(30, ecx1)
osSupportsAVX := false
// For XGETBV, OSXSAVE bit is required and sufficient.
@@ -47,6 +48,7 @@ func init() {
X86.HasAVX2 = isSet(5, ebx7) && osSupportsAVX
X86.HasBMI2 = isSet(8, ebx7)
X86.HasERMS = isSet(9, ebx7)
X86.HasRDSEED = isSet(18, ebx7)
X86.HasADX = isSet(19, ebx7)
}