1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx | FileCheck %s --check-prefix=X64
; These tests just check that the plumbing is in place for @llvm.bitreverse. The
; actual output is massive at the moment as llvm.bitreverse is not yet legal.
declare i32 @llvm.bitreverse.i32(i32) readnone
declare <4 x i32> @llvm.bitreverse.v4i32(<4 x i32>) readnone
; fold (bitreverse undef) -> undef
define i32 @test_undef() nounwind {
; X86-LABEL: test_undef:
; X86: # %bb.0:
; X86-NEXT: retl
;
; X64-LABEL: test_undef:
; X64: # %bb.0:
; X64-NEXT: retq
%b = call i32 @llvm.bitreverse.i32(i32 undef)
ret i32 %b
}
; fold (bitreverse (bitreverse x)) -> x
define i32 @test_bitreverse_bitreverse(i32 %a0) nounwind {
; X86-LABEL: test_bitreverse_bitreverse:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: test_bitreverse_bitreverse:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: retq
%b = call i32 @llvm.bitreverse.i32(i32 %a0)
%c = call i32 @llvm.bitreverse.i32(i32 %b)
ret i32 %c
}
define <4 x i32> @test_demandedbits_bitreverse(<4 x i32> %a0) nounwind {
; X86-LABEL: test_demandedbits_bitreverse:
; X86: # %bb.0:
; X86-NEXT: pxor %xmm1, %xmm1
; X86-NEXT: movdqa %xmm0, %xmm2
; X86-NEXT: punpckhbw {{.*#+}} xmm2 = xmm2[8],xmm1[8],xmm2[9],xmm1[9],xmm2[10],xmm1[10],xmm2[11],xmm1[11],xmm2[12],xmm1[12],xmm2[13],xmm1[13],xmm2[14],xmm1[14],xmm2[15],xmm1[15]
; X86-NEXT: pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
; X86-NEXT: pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
; X86-NEXT: punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3],xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
; X86-NEXT: pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
; X86-NEXT: pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
; X86-NEXT: packuswb %xmm2, %xmm0
; X86-NEXT: movdqa %xmm0, %xmm1
; X86-NEXT: psrlw $4, %xmm1
; X86-NEXT: movdqa {{.*#+}} xmm2 = [15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15]
; X86-NEXT: pand %xmm2, %xmm1
; X86-NEXT: pand %xmm2, %xmm0
; X86-NEXT: psllw $4, %xmm0
; X86-NEXT: por %xmm1, %xmm0
; X86-NEXT: movdqa %xmm0, %xmm1
; X86-NEXT: psrlw $2, %xmm1
; X86-NEXT: movdqa {{.*#+}} xmm2 = [51,51,51,51,51,51,51,51,51,51,51,51,51,51,51,51]
; X86-NEXT: pand %xmm2, %xmm1
; X86-NEXT: pand %xmm2, %xmm0
; X86-NEXT: psllw $2, %xmm0
; X86-NEXT: por %xmm1, %xmm0
; X86-NEXT: movdqa %xmm0, %xmm1
; X86-NEXT: psrlw $1, %xmm1
; X86-NEXT: movdqa {{.*#+}} xmm2 = [85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85]
; X86-NEXT: pand %xmm2, %xmm1
; X86-NEXT: pand %xmm2, %xmm0
; X86-NEXT: paddb %xmm0, %xmm0
; X86-NEXT: por %xmm1, %xmm0
; X86-NEXT: pand {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0
; X86-NEXT: retl
;
; X64-LABEL: test_demandedbits_bitreverse:
; X64: # %bb.0:
; X64-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[3,2,1,0,7,6,5,4,11,10,9,8,15,14,13,12]
; X64-NEXT: vmovdqa {{.*#+}} xmm1 = [15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15]
; X64-NEXT: vpand %xmm1, %xmm0, %xmm2
; X64-NEXT: vmovdqa {{.*#+}} xmm3 = [0,128,64,192,32,160,96,224,16,144,80,208,48,176,112,240]
; X64-NEXT: vpshufb %xmm2, %xmm3, %xmm2
; X64-NEXT: vpsrlw $4, %xmm0, %xmm0
; X64-NEXT: vpand %xmm1, %xmm0, %xmm0
; X64-NEXT: vmovdqa {{.*#+}} xmm1 = [0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15]
; X64-NEXT: vpshufb %xmm0, %xmm1, %xmm0
; X64-NEXT: vpor %xmm0, %xmm2, %xmm0
; X64-NEXT: vpand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0, %xmm0
; X64-NEXT: retq
%b = or <4 x i32> %a0, <i32 2147483648, i32 2147483648, i32 2147483648, i32 2147483648>
%c = call <4 x i32> @llvm.bitreverse.v4i32(<4 x i32> %b)
%d = and <4 x i32> %c, <i32 -2, i32 -2, i32 -2, i32 -2>
ret <4 x i32> %d
}
|
