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[flang][cuda] Add interfaces for int_as_float and float_as_int #153716

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Merged
merged 2 commits into from
Aug 15, 2025
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[flang][cuda] Add interfaces for int_as_float and float_as_int #153716

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8be51fc
[flang][cuda] Add interfaces for int_as_float and float_as_int
clementval Aug 15, 2025
9e3be47
Merge branch 'main' into cuf_float_as_int
clementval Aug 15, 2025
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14 changes: 14 additions & 0 deletions flang/module/cudadevice.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -471,6 +471,20 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
end function
end interface

interface int_as_float
attributes(device) real function __int_as_float(i) bind(c, name='__nv_int_as_float')
!dir$ ignore_tkr (d) i
integer, value :: i
end function
end interface

interface float_as_int
attributes(device) integer function __float_as_int(i) bind(c, name='__nv_float_as_int')
!dir$ ignore_tkr (d) i
real, value :: i
end function
end interface

interface __float2half_rn
attributes(device) real(2) function __float2half_rn(r) bind(c, name='__nv_float2half_rn')
!dir$ ignore_tkr (d) r
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18 changes: 18 additions & 0 deletions flang/test/Lower/CUDA/cuda-libdevice.cuf
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Expand Up @@ -244,3 +244,21 @@ end subroutine
! CHECK: %{{.*}} = fir.call @__nv_float2uint_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32
! CHECK: %{{.*}} = fir.call @__nv_float2uint_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32
! CHECK: %{{.*}} = fir.call @__nv_float2uint_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32

attributes(global) subroutine test_int_as_float()
integer :: i
real :: res
res = int_as_float(i)
end subroutine

! CHECK-LABEL: _QPtest_int_as_float
! CHECK: %{{.*}} = fir.call @__nv_int_as_float(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32) -> f32

attributes(global) subroutine test_float_as_int()
integer :: res
real :: r
res = float_as_int(r)
end subroutine

! CHECK-LABEL: _QPtest_float_as_int
! CHECK: %{{.*}} = fir.call @__nv_float_as_int(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f32) -> i32