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[flang][cuda] Add bind name for __clz interface #153268

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Merged
merged 2 commits into from
Aug 13, 2025
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Merged

[flang][cuda] Add bind name for __clz interface #153268

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e7620a7
[flang][cuda] Add bind name for __clz interface
clementval Aug 12, 2025
11fa797
Merge branch 'main' into cuf_clz
clementval Aug 13, 2025
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4 changes: 2 additions & 2 deletions flang/module/cudadevice.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -738,11 +738,11 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
end interface

interface __clz
attributes(device) integer function __clz(i) bind(c)
attributes(device) integer function __clz(i) bind(c, name='__nv_clz')
!dir$ ignore_tkr (d) i
integer, value :: i
end function
attributes(device) integer function __clzll(i) bind(c)
attributes(device) integer function __clzll(i) bind(c, name='__nv_clzll')
!dir$ ignore_tkr (d) i
integer(8), value :: i
end function
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5 changes: 4 additions & 1 deletion flang/test/Lower/CUDA/cuda-device-proc.cuf
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Expand Up @@ -58,7 +58,8 @@ attributes(global) subroutine devsub()
res = __ffs(al)
res = __brev(ai)
resl = __brev(al)

res = __clz(ai)
res = __clz(al)
ai = __mul24(ai, ai)
ai = __umul24(ai, ai)
end
Expand Down Expand Up @@ -107,6 +108,8 @@ end
! CHECK: %{{.*}} = fir.call @__nv_ffsll(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> i32
! CHECK: %{{.*}} = fir.call @__nv_brev(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32) -> i32
! CHECK: %{{.*}} = fir.call @__nv_brevll(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> i64
! CHECK: %{{.*}} = fir.call @__nv_clz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32) -> i32
! CHECK: %{{.*}} = fir.call @__nv_clzll(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i64) -> i32

! CHECK: %{{.*}} = fir.call @__nv_mul24(%{{.*}}, %{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32, i32) -> i32
! CHECK: %{{.*}} = fir.call @__nv_umul24(%{{.*}}, %{{.*}}) proc_attrs<bind_c> fastmath<contract> : (i32, i32) -> i32
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