constants.go

     1  // asmcheck
     2  
     3  // Copyright 2023 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  package codegen
     8  
     9  // A uint16 or sint16 constant shifted left.
    10  func shifted16BitConstants() (out [64]uint64) {
    11  	// ppc64x: "MOVD [$]8193,", "SLD [$]27,"
    12  	out[0] = 0x0000010008000000
    13  	// ppc64x: "MOVD [$]-32767", "SLD [$]26,"
    14  	out[1] = 0xFFFFFE0004000000
    15  	// ppc64x: "MOVD [$]-1", "SLD [$]48,"
    16  	out[2] = 0xFFFF000000000000
    17  	// ppc64x: "MOVD [$]65535", "SLD [$]44,"
    18  	out[3] = 0x0FFFF00000000000
    19  	return
    20  }
    21  
    22  // A contiguous set of 1 bits, potentially wrapping.
    23  func contiguousMaskConstants() (out [64]uint64) {
    24  	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]44, [$]63,"
    25  	out[0] = 0xFFFFF00000000001
    26  	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]43, [$]63,"
    27  	out[1] = 0xFFFFF80000000001
    28  	// ppc64x: "MOVD [$]-1", "RLDC R[0-9]+, [$]43, [$]4,"
    29  	out[2] = 0x0FFFF80000000000
    30  	// ppc64x/power8: "MOVD [$]-1", "RLDC R[0-9]+, [$]33, [$]63,"
    31  	// ppc64x/power9: "MOVD [$]-1", "RLDC R[0-9]+, [$]33, [$]63,"
    32  	// ppc64x/power10: "MOVD [$]-8589934591,"
    33  	out[3] = 0xFFFFFFFE00000001
    34  	return
    35  }
    36
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