llvm/test/CodeGen/AArch64/isinf.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-none-linux-gnu -mattr=+neon,+fullfp16 < %s -o -| FileCheck %s

declare half   @llvm.fabs.f16(half)
declare float  @llvm.fabs.f32(float)
declare double @llvm.fabs.f64(double)
declare fp128  @llvm.fabs.f128(fp128)

; INFINITY requires loading the constant for _Float16
define i32 @replace_isinf_call_f16(half %x) {
; CHECK-LABEL: replace_isinf_call_f16:
; CHECK:       // %bb.0:
; CHECK-NEXT:    adrp x8, .LCPI0_0
; CHECK-NEXT:    fabs h0, h0
; CHECK-NEXT:    ldr h1, [x8, :lo12:.LCPI0_0]
; CHECK-NEXT:    fcmp h0, h1
; CHECK-NEXT:    cset w0, eq
; CHECK-NEXT:    ret
  %abs = tail call half @llvm.fabs.f16(half %x)
  %cmpinf = fcmp oeq half %abs, 0xH7C00
  %ret = zext i1 %cmpinf to i32
  ret i32 %ret
}

; Check if INFINITY for float is materialized
define i32 @replace_isinf_call_f32(float %x) {
; CHECK-LABEL: replace_isinf_call_f32:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov w8, #2139095040
; CHECK-NEXT:    fabs s0, s0
; CHECK-NEXT:    fmov s1, w8
; CHECK-NEXT:    fcmp s0, s1
; CHECK-NEXT:    cset w0, eq
; CHECK-NEXT:    ret
  %abs = tail call float @llvm.fabs.f32(float %x)
  %cmpinf = fcmp oeq float %abs, 0x7FF0000000000000
  %ret = zext i1 %cmpinf to i32
  ret i32 %ret
}

; Check if INFINITY for double is materialized
define i32 @replace_isinf_call_f64(double %x) {
; CHECK-LABEL: replace_isinf_call_f64:
; CHECK:       // %bb.0:
; CHECK-NEXT:    mov x8, #9218868437227405312
; CHECK-NEXT:    fabs d0, d0
; CHECK-NEXT:    fmov d1, x8
; CHECK-NEXT:    fcmp d0, d1
; CHECK-NEXT:    cset w0, eq
; CHECK-NEXT:    ret
  %abs = tail call double @llvm.fabs.f64(double %x)
  %cmpinf = fcmp oeq double %abs, 0x7FF0000000000000
  %ret = zext i1 %cmpinf to i32
  ret i32 %ret
}

; For long double it still requires loading the constant.
define i32 @replace_isinf_call_f128(fp128 %x) {
; CHECK-LABEL: replace_isinf_call_f128:
; CHECK:       // %bb.0:
; CHECK-NEXT:    sub sp, sp, #32
; CHECK-NEXT:    str x30, [sp, #16] // 8-byte Folded Spill
; CHECK-NEXT:    .cfi_def_cfa_offset 32
; CHECK-NEXT:    .cfi_offset w30, -16
; CHECK-NEXT:    str q0, [sp]
; CHECK-NEXT:    ldrb w8, [sp, #15]
; CHECK-NEXT:    and w8, w8, #0x7f
; CHECK-NEXT:    strb w8, [sp, #15]
; CHECK-NEXT:    adrp x8, .LCPI3_0
; CHECK-NEXT:    ldr q0, [sp]
; CHECK-NEXT:    ldr q1, [x8, :lo12:.LCPI3_0]
; CHECK-NEXT:    bl __eqtf2
; CHECK-NEXT:    ldr x30, [sp, #16] // 8-byte Folded Reload
; CHECK-NEXT:    cmp w0, #0
; CHECK-NEXT:    cset w0, eq
; CHECK-NEXT:    add sp, sp, #32
; CHECK-NEXT:    ret
  %abs = tail call fp128 @llvm.fabs.f128(fp128 %x)
  %cmpinf = fcmp oeq fp128 %abs, 0xL00000000000000007FFF000000000000
  %ret = zext i1 %cmpinf to i32
  ret i32 %ret
}