[Backport to 14] Translate atomicrmw fadd into AtomicFAddEXT (Khronos…

…Group#1757)

Signed-off-by: Sarnie, Nick <nick.sarnie@intel.com>

lib/SPIRV/OCLUtil.cpp

@@ -646,6 +646,7 @@ template <> void LLVMSPIRVAtomicRmwOpCodeMap::init() {
   add(llvm::AtomicRMWInst::Min, OpAtomicSMin);
   add(llvm::AtomicRMWInst::UMax, OpAtomicUMax);
   add(llvm::AtomicRMWInst::UMin, OpAtomicUMin);
+  add(llvm::AtomicRMWInst::FAdd, OpAtomicFAddEXT);
 }
 
 } // namespace SPIRV

lib/SPIRV/SPIRVWriter.cpp

@@ -2173,9 +2173,11 @@ LLVMToSPIRVBase::transValueWithoutDecoration(Value *V, SPIRVBasicBlock *BB,
 
   if (AtomicRMWInst *ARMW = dyn_cast<AtomicRMWInst>(V)) {
     AtomicRMWInst::BinOp Op = ARMW->getOperation();
+    bool SupportedAtomicInst = AtomicRMWInst::isFPOperation(Op)
+                                   ? Op == AtomicRMWInst::FAdd
+                                   : Op != AtomicRMWInst::Nand;
     if (!BM->getErrorLog().checkError(
-            !AtomicRMWInst::isFPOperation(Op) && Op != AtomicRMWInst::Nand,
-            SPIRVEC_InvalidInstruction, V,
+            SupportedAtomicInst, SPIRVEC_InvalidInstruction, V,
             "Atomic " + AtomicRMWInst::getOperationName(Op).str() +
                 " is not supported in SPIR-V!\n"))
       return nullptr;

test/extensions/EXT/SPV_EXT_shader_atomic_float_/atomicrmw_fadd_double.ll

@@ -0,0 +1,33 @@
+; RUN: llvm-as -opaque-pointers < %s -o %t.bc
+; RUN: llvm-spirv -opaque-pointers --spirv-ext=+SPV_EXT_shader_atomic_float_add %t.bc -o %t.spv
+; RUN: spirv-val %t.spv
+; RUN: llvm-spirv -opaque-pointers -to-text %t.spv -o - | FileCheck %s
+
+; CHECK-DAG: Extension "SPV_EXT_shader_atomic_float_add"
+; CHECK-DAG: Capability AtomicFloat64AddEXT
+; CHECK: TypeInt [[Int:[0-9]+]] 32 0
+; CHECK-DAG: Constant [[Int]] [[Scope_Device:[0-9]+]] 1 {{$}}
+; CHECK-DAG: Constant [[Int]] [[MemSem_SequentiallyConsistent:[0-9]+]] 16
+; CHECK: TypeFloat [[Double:[0-9]+]] 64
+; CHECK: Variable {{[0-9]+}} [[DoublePointer:[0-9]+]]
+; CHECK: Constant [[Double]] [[DoubleValue:[0-9]+]] 0 1078263808
+
+target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
+target triple = "spir64"
+
+@f = common dso_local local_unnamed_addr addrspace(1) global double 0.000000e+00, align 8
+
+; Function Attrs: nounwind
+define dso_local spir_func void @test_atomicrmw_fadd() local_unnamed_addr #0 {
+entry:
+ %0 = atomicrmw fadd double addrspace(1)* @f, double 42.000000e+00 seq_cst
+; CHECK: AtomicFAddEXT [[Double]] {{[0-9]+}} [[DoublePointer]] [[Scope_Device]] [[MemSem_SequentiallyConsistent]] [[DoubleValue]]
+
+  ret void
+}
+
+attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.module.flags = !{!0}
+
+!0 = !{i32 1, !"wchar_size", i32 4}

test/extensions/EXT/SPV_EXT_shader_atomic_float_/atomicrmw_fadd_float.ll

@@ -0,0 +1,33 @@
+; RUN: llvm-as -opaque-pointers < %s -o %t.bc
+; RUN: llvm-spirv -opaque-pointers --spirv-ext=+SPV_EXT_shader_atomic_float_add %t.bc -o %t.spv
+; RUN: spirv-val %t.spv
+; RUN: llvm-spirv -opaque-pointers -to-text %t.spv -o - | FileCheck %s
+
+; CHECK-DAG: Extension "SPV_EXT_shader_atomic_float_add"
+; CHECK-DAG: Capability AtomicFloat32AddEXT
+; CHECK: TypeInt [[Int:[0-9]+]] 32 0
+; CHECK-DAG: Constant [[Int]] [[Scope_Device:[0-9]+]] 1 {{$}}
+; CHECK-DAG: Constant [[Int]] [[MemSem_SequentiallyConsistent:[0-9]+]] 16
+; CHECK: TypeFloat [[Float:[0-9]+]] 32
+; CHECK: Variable {{[0-9]+}} [[FPPointer:[0-9]+]]
+; CHECK: Constant [[Float]] [[FPValue:[0-9]+]] 1109917696
+
+target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
+target triple = "spir64"
+
+@f = common dso_local local_unnamed_addr addrspace(1) global float 0.000000e+00, align 4
+
+; Function Attrs: nounwind
+define dso_local spir_func void @test_atomicrmw_fadd() local_unnamed_addr #0 {
+entry:
+ %0 = atomicrmw fadd float addrspace(1)* @f, float 42.000000e+00 seq_cst
+; CHECK: AtomicFAddEXT [[Float]] {{[0-9]+}} [[FPPointer]] [[Scope_Device]] [[MemSem_SequentiallyConsistent]] [[FPValue]]
+
+  ret void
+}
+
+attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.module.flags = !{!0}
+
+!0 = !{i32 1, !"wchar_size", i32 4}