1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // This file encapsulates some of the odd characteristics of the 6 // AMD64 instruction set, to minimize its interaction 7 // with the core of the assembler. 8 9 package arch 10 11 import ( 12 "cmd/internal/obj" 13 "cmd/internal/obj/x86" 14 ) 15 16 // IsAMD4OP reports whether the op (as defined by an amd64.A* constant) is 17 // a 4-operand instruction. 18 func IsAMD4OP(op obj.As) bool { 19 switch op { 20 case x86.AVPERM2F128, 21 x86.AVPALIGNR, 22 x86.AVPERM2I128, 23 x86.AVINSERTI128, 24 x86.AVPBLENDD: 25 return true 26 } 27 return false 28 } 29
