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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=sse2 | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx,use-sqrt-est | FileCheck %s --check-prefix=ESTIMATE
declare double @__sqrt_finite(double) #0
declare float @__sqrtf_finite(float) #0
declare x86_fp80 @__sqrtl_finite(x86_fp80) #0
declare float @llvm.sqrt.f32(float) #0
declare <4 x float> @llvm.sqrt.v4f32(<4 x float>) #0
declare <8 x float> @llvm.sqrt.v8f32(<8 x float>) #0
define double @fd(double %d) #0 {
; CHECK-LABEL: fd:
; CHECK: # BB#0:
; CHECK-NEXT: sqrtsd %xmm0, %xmm0
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: fd:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: vsqrtsd %xmm0, %xmm0, %xmm0
; ESTIMATE-NEXT: retq
%call = tail call double @__sqrt_finite(double %d) #1
ret double %call
}
define float @ff(float %f) #0 {
; CHECK-LABEL: ff:
; CHECK: # BB#0:
; CHECK-NEXT: sqrtss %xmm0, %xmm0
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: ff:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: vrsqrtss %xmm0, %xmm0, %xmm1
; ESTIMATE-NEXT: vmulss {{.*}}(%rip), %xmm1, %xmm2
; ESTIMATE-NEXT: vmulss %xmm1, %xmm1, %xmm1
; ESTIMATE-NEXT: vmulss %xmm0, %xmm1, %xmm1
; ESTIMATE-NEXT: vaddss {{.*}}(%rip), %xmm1, %xmm1
; ESTIMATE-NEXT: vmulss %xmm2, %xmm1, %xmm1
; ESTIMATE-NEXT: vmulss %xmm1, %xmm0, %xmm1
; ESTIMATE-NEXT: vxorps %xmm2, %xmm2, %xmm2
; ESTIMATE-NEXT: vcmpeqss %xmm2, %xmm0, %xmm0
; ESTIMATE-NEXT: vandnps %xmm1, %xmm0, %xmm0
; ESTIMATE-NEXT: retq
%call = tail call float @__sqrtf_finite(float %f) #1
ret float %call
}
define x86_fp80 @fld(x86_fp80 %ld) #0 {
; CHECK-LABEL: fld:
; CHECK: # BB#0:
; CHECK-NEXT: fldt {{[0-9]+}}(%rsp)
; CHECK-NEXT: fsqrt
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: fld:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: fldt {{[0-9]+}}(%rsp)
; ESTIMATE-NEXT: fsqrt
; ESTIMATE-NEXT: retq
%call = tail call x86_fp80 @__sqrtl_finite(x86_fp80 %ld) #1
ret x86_fp80 %call
}
define float @reciprocal_square_root(float %x) #0 {
; CHECK-LABEL: reciprocal_square_root:
; CHECK: # BB#0:
; CHECK-NEXT: sqrtss %xmm0, %xmm1
; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; CHECK-NEXT: divss %xmm1, %xmm0
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: reciprocal_square_root:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: vrsqrtss %xmm0, %xmm0, %xmm1
; ESTIMATE-NEXT: vmulss {{.*}}(%rip), %xmm1, %xmm2
; ESTIMATE-NEXT: vmulss %xmm1, %xmm1, %xmm1
; ESTIMATE-NEXT: vmulss %xmm0, %xmm1, %xmm0
; ESTIMATE-NEXT: vaddss {{.*}}(%rip), %xmm0, %xmm0
; ESTIMATE-NEXT: vmulss %xmm2, %xmm0, %xmm0
; ESTIMATE-NEXT: retq
%sqrt = tail call float @llvm.sqrt.f32(float %x)
%div = fdiv fast float 1.0, %sqrt
ret float %div
}
define <4 x float> @reciprocal_square_root_v4f32(<4 x float> %x) #0 {
; CHECK-LABEL: reciprocal_square_root_v4f32:
; CHECK: # BB#0:
; CHECK-NEXT: sqrtps %xmm0, %xmm1
; CHECK-NEXT: movaps {{.*#+}} xmm0 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
; CHECK-NEXT: divps %xmm1, %xmm0
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: reciprocal_square_root_v4f32:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: vrsqrtps %xmm0, %xmm1
; ESTIMATE-NEXT: vmulps %xmm1, %xmm1, %xmm2
; ESTIMATE-NEXT: vmulps %xmm0, %xmm2, %xmm0
; ESTIMATE-NEXT: vaddps {{.*}}(%rip), %xmm0, %xmm0
; ESTIMATE-NEXT: vmulps {{.*}}(%rip), %xmm1, %xmm1
; ESTIMATE-NEXT: vmulps %xmm1, %xmm0, %xmm0
; ESTIMATE-NEXT: retq
%sqrt = tail call <4 x float> @llvm.sqrt.v4f32(<4 x float> %x)
%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
ret <4 x float> %div
}
define <8 x float> @reciprocal_square_root_v8f32(<8 x float> %x) #0 {
; CHECK-LABEL: reciprocal_square_root_v8f32:
; CHECK: # BB#0:
; CHECK-NEXT: sqrtps %xmm1, %xmm2
; CHECK-NEXT: sqrtps %xmm0, %xmm3
; CHECK-NEXT: movaps {{.*#+}} xmm1 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
; CHECK-NEXT: movaps %xmm1, %xmm0
; CHECK-NEXT: divps %xmm3, %xmm0
; CHECK-NEXT: divps %xmm2, %xmm1
; CHECK-NEXT: retq
;
; ESTIMATE-LABEL: reciprocal_square_root_v8f32:
; ESTIMATE: # BB#0:
; ESTIMATE-NEXT: vrsqrtps %ymm0, %ymm1
; ESTIMATE-NEXT: vmulps %ymm1, %ymm1, %ymm2
; ESTIMATE-NEXT: vmulps %ymm0, %ymm2, %ymm0
; ESTIMATE-NEXT: vaddps {{.*}}(%rip), %ymm0, %ymm0
; ESTIMATE-NEXT: vmulps {{.*}}(%rip), %ymm1, %ymm1
; ESTIMATE-NEXT: vmulps %ymm1, %ymm0, %ymm0
; ESTIMATE-NEXT: retq
%sqrt = tail call <8 x float> @llvm.sqrt.v8f32(<8 x float> %x)
%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %sqrt
ret <8 x float> %div
}
attributes #0 = { "unsafe-fp-math"="true" }
attributes #1 = { nounwind readnone }
|
