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b64e817853
Reduces cmd/go by 4464 bytes on amd64. Removes the duplicate detection of AVX support and presence of Intel processors. Change-Id: I4670189951a63760fae217708f68d65e94a30dc5 Reviewed-on: https://go-review.googlesource.com/41570 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
21 lines
551 B
Go
21 lines
551 B
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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var useAVXmemmove bool
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func init() {
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// Let's remove stepping and reserved fields
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processorVersionInfo := cpuid_eax & 0x0FFF3FF0
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isIntelBridgeFamily := isIntel &&
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(processorVersionInfo == 0x206A0 ||
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processorVersionInfo == 0x206D0 ||
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processorVersionInfo == 0x306A0 ||
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processorVersionInfo == 0x306E0)
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useAVXmemmove = support_avx && !isIntelBridgeFamily
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}
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