1 files changed, 46 insertions, 0 deletions
diff --git a/libclc/amdgpu/lib/image/read_image_impl.ll b/libclc/amdgpu/lib/image/read_image_impl.ll
new file mode 100644
index 00000000000..229a2526c37
--- /dev/null
+++ b/libclc/amdgpu/lib/image/read_image_impl.ll
@@ -0,0 +1,46 @@
+%opencl.image2d_t = type opaque
+
+declare <4 x float> @llvm.R600.tex(<4 x float>, i32, i32, i32, i32, i32, i32,
+                                   i32, i32, i32) readnone
+declare i32 @llvm.OpenCL.image.get.resource.id.2d(
+  %opencl.image2d_t addrspace(1)*) nounwind readnone
+declare i32 @llvm.OpenCL.sampler.get.resource.id(i32) readnone
+
+define <4 x float> @__clc_v4f_from_v2f(<2 x float> %v) alwaysinline {
+  %e0 = extractelement <2 x float> %v, i32 0
+  %e1 = extractelement <2 x float> %v, i32 1
+  %res.0 = insertelement <4 x float> undef,  float %e0, i32 0
+  %res.1 = insertelement <4 x float> %res.0, float %e1, i32 1
+  %res.2 = insertelement <4 x float> %res.1, float 0.0, i32 2
+  %res.3 = insertelement <4 x float> %res.2, float 0.0, i32 3
+  ret <4 x float> %res.3
+}
+
+define <4 x float> @__clc_read_imagef_tex(
+    %opencl.image2d_t addrspace(1)* nocapture %img,
+    i32 %sampler, <2 x float> %coord) alwaysinline {
+entry:
+  %coord_v4 = call <4 x float> @__clc_v4f_from_v2f(<2 x float> %coord)
+  %smp_id = call i32 @llvm.OpenCL.sampler.get.resource.id(i32 %sampler)
+  %img_id = call i32 @llvm.OpenCL.image.get.resource.id.2d(
+      %opencl.image2d_t addrspace(1)* %img)
+  %tex_id = add i32 %img_id, 2    ; First 2 IDs are reserved.
+
+  %coord_norm = and i32 %sampler, 1
+  %is_norm = icmp eq i32 %coord_norm, 1
+  br i1 %is_norm, label %NormCoord, label %UnnormCoord
+NormCoord:
+  %data.norm = call <4 x float> @llvm.R600.tex(
+      <4 x float> %coord_v4,
+      i32 0, i32 0, i32 0,        ; Offset.
+      i32 2, i32 %smp_id,
+      i32 1, i32 1, i32 1, i32 1) ; Normalized coords.
+  ret <4 x float> %data.norm
+UnnormCoord:
+  %data.unnorm = call <4 x float> @llvm.R600.tex(
+      <4 x float> %coord_v4,
+      i32 0, i32 0, i32 0,        ; Offset.
+      i32 %tex_id, i32 %smp_id,
+      i32 0, i32 0, i32 0, i32 0) ; Unnormalized coords.
+  ret <4 x float> %data.unnorm
+}