test/CodeGen/NVPTX/fast-math.ll


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

; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s


declare float @llvm.nvvm.sqrt.f(float)


; CHECK: sqrt_div
; CHECK: sqrt.rn.f32
; CHECK: div.rn.f32
define float @sqrt_div(float %a, float %b) {
  %t1 = tail call float @llvm.nvvm.sqrt.f(float %a)
  %t2 = fdiv float %t1, %b
  ret float %t2
}

; CHECK: sqrt_div_fast
; CHECK: sqrt.approx.f32
; CHECK: div.approx.f32
define float @sqrt_div_fast(float %a, float %b) #0 {
  %t1 = tail call float @llvm.nvvm.sqrt.f(float %a)
  %t2 = fdiv float %t1, %b
  ret float %t2
}


; CHECK: fadd
; CHECK: add.f32
define float @fadd(float %a, float %b) {
  %t1 = fadd float %a, %b
  ret float %t1
}

; CHECK: fadd_ftz
; CHECK: add.ftz.f32
define float @fadd_ftz(float %a, float %b) #1 {
  %t1 = fadd float %a, %b
  ret float %t1
}


attributes #0 = { "unsafe-fp-math" = "true" }
attributes #1 = { "nvptx-f32ftz" = "true" }