[flang-commits] [flang] [flang][cuda] Add interfaces for __drcp_rX (PR #153681)

[Valentin Clement バレンタイン クレメン via flang-commits]

https://github.com/clementval created https://github.com/llvm/llvm-project/pull/153681

None

>From 005c64b303d42b310501ebfe51a6459a0bf4c2ed Mon Sep 17 00:00:00 2001
From: Valentin Clement <clementval at gmail.com>
Date: Thu, 14 Aug 2025 13:57:19 -0700
Subject: [PATCH] [flang][cuda] Add interfaces for __drcp_rX

---
 flang/module/cudadevice.f90              | 28 ++++++++++++++++++++++++
 flang/test/Lower/CUDA/cuda-libdevice.cuf | 15 +++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/flang/module/cudadevice.f90 b/flang/module/cudadevice.f90
index 1e403b1ffdb91..a1a337a387cea 100644
--- a/flang/module/cudadevice.f90
+++ b/flang/module/cudadevice.f90
@@ -779,6 +779,34 @@ attributes(device) real(8) function sinpi(x) bind(c,name='__nv_sinpi')
     end function
   end interface
 
+  interface __drcp_rd
+    attributes(device) double precision function __drcp_rd(x) bind(c, name='__nv_drcp_rd')
+      !dir$ ignore_tkr (d) x
+      double precision, value :: x
+    end function
+  end interface
+
+  interface __drcp_rn
+    attributes(device) double precision function __drcp_rn(x) bind(c, name='__nv_drcp_rn')
+      !dir$ ignore_tkr (d) x
+      double precision, value :: x
+    end function
+  end interface
+
+  interface __drcp_ru
+    attributes(device) double precision function __drcp_ru(x) bind(c, name='__nv_drcp_ru')
+      !dir$ ignore_tkr (d) x
+      double precision, value :: x
+    end function
+  end interface
+
+  interface __drcp_rz
+    attributes(device) double precision function __drcp_rz(x) bind(c, name='__nv_drcp_rz')
+      !dir$ ignore_tkr (d) x
+      double precision, value :: x
+    end function
+  end interface
+
   interface __dsqrt_rd
     attributes(device) double precision function __dsqrt_rd(x) bind(c, name='__nv_dsqrt_rd')
       !dir$ ignore_tkr (d) x
diff --git a/flang/test/Lower/CUDA/cuda-libdevice.cuf b/flang/test/Lower/CUDA/cuda-libdevice.cuf
index 844bdb954924a..a3c80f3179cca 100644
--- a/flang/test/Lower/CUDA/cuda-libdevice.cuf
+++ b/flang/test/Lower/CUDA/cuda-libdevice.cuf
@@ -115,3 +115,18 @@ end subroutine
 ! CHECK: %{{.*}} = fir.call @__nv_double2ll_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
 ! CHECK: %{{.*}} = fir.call @__nv_double2ll_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
 ! CHECK: %{{.*}} = fir.call @__nv_double2ll_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> i64
+
+attributes(global) subroutine test_drcp_rX()
+  double precision :: res
+  double precision :: r
+  res = __drcp_rd(r)
+  res = __drcp_rn(r)
+  res = __drcp_ru(r)
+  res = __drcp_rz(r)
+end subroutine
+
+! CHECK-LABEL: _QPtest_drcp_rx
+! CHECK: %{{.*}} = fir.call @__nv_drcp_rd(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_drcp_rn(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_drcp_ru(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64
+! CHECK: %{{.*}} = fir.call @__nv_drcp_rz(%{{.*}}) proc_attrs<bind_c> fastmath<contract> : (f64) -> f64