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cpu_linux_arm64.go

cpu_linux_arm64.go 2.1 KB
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  1. // Copyright 2018 The Go Authors. All rights reserved.
    2. 

  2. // Use of this source code is governed by a BSD-style
    3. 

  3. // license that can be found in the LICENSE file.
    4. 

  4. 

  5. package cpu
    6. 

  6. 

  7. // HWCAP/HWCAP2 bits. These are exposed by Linux.
    8. 

  8. const (
    9. 

  9. 	hwcap_FP       = 1 << 0
    10. 

  10. 	hwcap_ASIMD    = 1 << 1
    11. 

  11. 	hwcap_EVTSTRM  = 1 << 2
    12. 

  12. 	hwcap_AES      = 1 << 3
    13. 

  13. 	hwcap_PMULL    = 1 << 4
    14. 

  14. 	hwcap_SHA1     = 1 << 5
    15. 

  15. 	hwcap_SHA2     = 1 << 6
    16. 

  16. 	hwcap_CRC32    = 1 << 7
    17. 

  17. 	hwcap_ATOMICS  = 1 << 8
    18. 

  18. 	hwcap_FPHP     = 1 << 9
    19. 

  19. 	hwcap_ASIMDHP  = 1 << 10
    20. 

  20. 	hwcap_CPUID    = 1 << 11
    21. 

  21. 	hwcap_ASIMDRDM = 1 << 12
    22. 

  22. 	hwcap_JSCVT    = 1 << 13
    23. 

  23. 	hwcap_FCMA     = 1 << 14
    24. 

  24. 	hwcap_LRCPC    = 1 << 15
    25. 

  25. 	hwcap_DCPOP    = 1 << 16
    26. 

  26. 	hwcap_SHA3     = 1 << 17
    27. 

  27. 	hwcap_SM3      = 1 << 18
    28. 

  28. 	hwcap_SM4      = 1 << 19
    29. 

  29. 	hwcap_ASIMDDP  = 1 << 20
    30. 

  30. 	hwcap_SHA512   = 1 << 21
    31. 

  31. 	hwcap_SVE      = 1 << 22
    32. 

  32. 	hwcap_ASIMDFHM = 1 << 23
    33. 

  33. )
    34. 

  34. 

  35. func doinit() {
    36. 

  36. 	if err := readHWCAP(); err != nil {
    37. 

  37. 		// failed to read /proc/self/auxv, try reading registers directly
    38. 

  38. 		readARM64Registers()
    39. 

  39. 		return
    40. 

  40. 	}
    41. 

  41. 

  42. 	// HWCAP feature bits
    43. 

  43. 	ARM64.HasFP = isSet(hwCap, hwcap_FP)
    44. 

  44. 	ARM64.HasASIMD = isSet(hwCap, hwcap_ASIMD)
    45. 

  45. 	ARM64.HasEVTSTRM = isSet(hwCap, hwcap_EVTSTRM)
    46. 

  46. 	ARM64.HasAES = isSet(hwCap, hwcap_AES)
    47. 

  47. 	ARM64.HasPMULL = isSet(hwCap, hwcap_PMULL)
    48. 

  48. 	ARM64.HasSHA1 = isSet(hwCap, hwcap_SHA1)
    49. 

  49. 	ARM64.HasSHA2 = isSet(hwCap, hwcap_SHA2)
    50. 

  50. 	ARM64.HasCRC32 = isSet(hwCap, hwcap_CRC32)
    51. 

  51. 	ARM64.HasATOMICS = isSet(hwCap, hwcap_ATOMICS)
    52. 

  52. 	ARM64.HasFPHP = isSet(hwCap, hwcap_FPHP)
    53. 

  53. 	ARM64.HasASIMDHP = isSet(hwCap, hwcap_ASIMDHP)
    54. 

  54. 	ARM64.HasCPUID = isSet(hwCap, hwcap_CPUID)
    55. 

  55. 	ARM64.HasASIMDRDM = isSet(hwCap, hwcap_ASIMDRDM)
    56. 

  56. 	ARM64.HasJSCVT = isSet(hwCap, hwcap_JSCVT)
    57. 

  57. 	ARM64.HasFCMA = isSet(hwCap, hwcap_FCMA)
    58. 

  58. 	ARM64.HasLRCPC = isSet(hwCap, hwcap_LRCPC)
    59. 

  59. 	ARM64.HasDCPOP = isSet(hwCap, hwcap_DCPOP)
    60. 

  60. 	ARM64.HasSHA3 = isSet(hwCap, hwcap_SHA3)
    61. 

  61. 	ARM64.HasSM3 = isSet(hwCap, hwcap_SM3)
    62. 

  62. 	ARM64.HasSM4 = isSet(hwCap, hwcap_SM4)
    63. 

  63. 	ARM64.HasASIMDDP = isSet(hwCap, hwcap_ASIMDDP)
    64. 

  64. 	ARM64.HasSHA512 = isSet(hwCap, hwcap_SHA512)
    65. 

  65. 	ARM64.HasSVE = isSet(hwCap, hwcap_SVE)
    66. 

  66. 	ARM64.HasASIMDFHM = isSet(hwCap, hwcap_ASIMDFHM)
    67. 

  67. }
    68. 

  68. 

  69. func isSet(hwc uint, value uint) bool {
    70. 

  70. 	return hwc&value != 0
    71. 

  71. }
    72.