1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -mtriple=aarch64 < %s | FileCheck %s
4 ; This should codegen to fmaxnm with no-signed-zeros.
5 define float @fmaxnm(i32 %i1, i32 %i2) #0 {
8 ; CHECK-NEXT: ucvtf s0, w0
9 ; CHECK-NEXT: ucvtf s1, w1
10 ; CHECK-NEXT: fmov s2, #11.00000000
11 ; CHECK-NEXT: fmov s3, #17.00000000
12 ; CHECK-NEXT: fadd s0, s0, s2
13 ; CHECK-NEXT: fadd s1, s1, s3
14 ; CHECK-NEXT: fcmp s0, s1
15 ; CHECK-NEXT: fcsel s0, s0, s1, pl
17 %f1 = uitofp i32 %i1 to float
18 %fadd1 = fadd float %f1, 11.0
19 %f2 = uitofp i32 %i2 to float
20 %fadd2 = fadd float %f2, 17.0
21 %cmp = fcmp uge float %fadd1, %fadd2
22 %val = select i1 %cmp, float %fadd1, float %fadd2
26 ; If f1 is 0, fmul is NaN because 0.0 * -INF = NaN
27 ; Therefore, this is not fmaxnm.
28 define float @not_fmaxnm_maybe_nan(i32 %i1, i32 %i2) #0 {
29 ; CHECK-LABEL: not_fmaxnm_maybe_nan:
31 ; CHECK-NEXT: ucvtf s0, w0
32 ; CHECK-NEXT: ucvtf s1, w1
33 ; CHECK-NEXT: mov w8, #-8388608 // =0xff800000
34 ; CHECK-NEXT: fmov s2, #17.00000000
35 ; CHECK-NEXT: fmov s3, w8
36 ; CHECK-NEXT: fmul s0, s0, s3
37 ; CHECK-NEXT: fadd s1, s1, s2
38 ; CHECK-NEXT: fcmp s0, s1
39 ; CHECK-NEXT: fcsel s0, s0, s1, pl
41 %f1 = uitofp i32 %i1 to float
42 %fmul = fmul float %f1, 0xfff0000000000000 ; -INFINITY as 64-bit hex
43 %f2 = uitofp i32 %i2 to float
44 %fadd2 = fadd float %f2, 17.0
45 %cmp = fcmp uge float %fmul, %fadd2
46 %val = select i1 %cmp, float %fmul, float %fadd2
50 attributes #0 = { "no-signed-zeros-fp-math"="true" }