Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/powerpc/lib/hweight_64.S
10817 views
1
/*

2
 * This program is free software; you can redistribute it and/or modify

3
 * it under the terms of the GNU General Public License as published by

4
 * the Free Software Foundation; either version 2 of the License, or

5
 * (at your option) any later version.

6
 *

7
 * This program is distributed in the hope that it will be useful,

8
 * but WITHOUT ANY WARRANTY; without even the implied warranty of

9
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

10
 * GNU General Public License for more details.

11
 *

12
 * You should have received a copy of the GNU General Public License

13
 * along with this program; if not, write to the Free Software

14
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

15
 *

16
 * Copyright (C) IBM Corporation, 2010

17
 *

18
 * Author: Anton Blanchard <[email protected]>

19
 */

20
#include <asm/processor.h>

21
#include <asm/ppc_asm.h>

22


23
/* Note: This code relies on -mminimal-toc */

24


25
_GLOBAL(__arch_hweight8)

26
BEGIN_FTR_SECTION

27
	b .__sw_hweight8

28
	nop

29
	nop

30
FTR_SECTION_ELSE

31
	PPC_POPCNTB(r3,r3)

32
	clrldi	r3,r3,64-8

33
	blr

34
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)

35


36
_GLOBAL(__arch_hweight16)

37
BEGIN_FTR_SECTION

38
	b .__sw_hweight16

39
	nop

40
	nop

41
	nop

42
	nop

43
FTR_SECTION_ELSE

44
  BEGIN_FTR_SECTION_NESTED(50)

45
	PPC_POPCNTB(r3,r3)

46
	srdi	r4,r3,8

47
	add	r3,r4,r3

48
	clrldi	r3,r3,64-8

49
	blr

50
  FTR_SECTION_ELSE_NESTED(50)

51
	clrlwi  r3,r3,16

52
	PPC_POPCNTW(r3,r3)

53
	clrldi	r3,r3,64-8

54
	blr

55
  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 50)

56
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)

57


58
_GLOBAL(__arch_hweight32)

59
BEGIN_FTR_SECTION

60
	b .__sw_hweight32

61
	nop

62
	nop

63
	nop

64
	nop

65
	nop

66
	nop

67
FTR_SECTION_ELSE

68
  BEGIN_FTR_SECTION_NESTED(51)

69
	PPC_POPCNTB(r3,r3)

70
	srdi	r4,r3,16

71
	add	r3,r4,r3

72
	srdi	r4,r3,8

73
	add	r3,r4,r3

74
	clrldi	r3,r3,64-8

75
	blr

76
  FTR_SECTION_ELSE_NESTED(51)

77
	PPC_POPCNTW(r3,r3)

78
	clrldi	r3,r3,64-8

79
	blr

80
  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 51)

81
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)

82


83
_GLOBAL(__arch_hweight64)

84
BEGIN_FTR_SECTION

85
	b .__sw_hweight64

86
	nop

87
	nop

88
	nop

89
	nop

90
	nop

91
	nop

92
	nop

93
	nop

94
FTR_SECTION_ELSE

95
  BEGIN_FTR_SECTION_NESTED(52)

96
	PPC_POPCNTB(r3,r3)

97
	srdi	r4,r3,32

98
	add	r3,r4,r3

99
	srdi	r4,r3,16

100
	add	r3,r4,r3

101
	srdi	r4,r3,8

102
	add	r3,r4,r3

103
	clrldi	r3,r3,64-8

104
	blr

105
  FTR_SECTION_ELSE_NESTED(52)

106
	PPC_POPCNTD(r3,r3)

107
	clrldi	r3,r3,64-8

108
	blr

109
  ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 52)

110
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)

111


112