[clang] [llvm] [PPC] Implement BCD assist builtins (PR #101390)

[Chen Zheng via cfe-commits]

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@@ -0,0 +1,75 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: powerpc-registered-target
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux -O2 -target-cpu pwr7 \
+// RUN:   -emit-llvm %s -o - | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64-unknown-aix -O2 -target-cpu pwr7 \
+// RUN:   -emit-llvm %s -o - | FileCheck %s
+// RUN: not %clang_cc1 -triple powerpc-unknown-aix -O2 -target-cpu pwr7 \
+// RUN:   -emit-llvm %s -o - 2>&1 | FileCheck %s --check-prefix=CHECK-32-ERROR
+
+// CHECK-LABEL: define{{.*}} i64 @cdtbcd_test(i64
+// CHECK-NEXT:  [[ENTRY:.*:]]
+// CHECK-NEXT:  [[TMP0:%.*]] = tail call i64  @llvm.ppc.cdtbcdd(i64
+// CHECK-NEXT:  ret i64 [[TMP0]]
+// CHECK-32-ERROR: error: this builtin is only available on 64-bit targets
+// CHECK-32-ERROR: #define __cdtbcd __builtin_ppc_cdtbcd
+long long cdtbcd_test(long long ll) {
+    return __cdtbcd (ll);
+}
+
+// CHECK-LABEL: define{{.*}} i32 @cdtbcd_test_ui(i32
+// CHECK-NEXT:  [[ENTRY:.*:]]
+// CHECK-NEXT:  [[CONV:%.*]] = zext i32 {{.*}} to i64
+// CHECK-NEXT:  [[TMP0:%.*]] = tail call i64 @llvm.ppc.cdtbcdd(i64 [[CONV]])
+// CHECK-NEXT:  [[CONV1:%.*]] = trunc i64 [[TMP0]] to i32
+// CHECK-NEXT:  ret i32 [[CONV1]]
+// CHECK-32-ERROR: error: this builtin is only available on 64-bit targets
+// CHECK-32-ERROR: #define __cdtbcd __builtin_ppc_cdtbcd
+unsigned int cdtbcd_test_ui(unsigned int ui) {
+    return __cdtbcd (ui);
+}
+
+// CHECK-LABEL: define{{.*}} i64 @cbcdtd_test(i64
+// CHECK-NEXT:  [[ENTRY:.*:]]
+// CHECK-NEXT:  [[TMP0:%.*]] = tail call i64 @llvm.ppc.cbcdtdd(i64
+// CHECK-NEXT:  ret i64 [[TMP0]]
+// CHECK-32-ERROR: error: this builtin is only available on 64-bit targets
+// CHECK-32-ERROR: #define __cbcdtd __builtin_ppc_cbcdtd
+long long cbcdtd_test(long long ll) {
+    return __cbcdtd (ll);
+}
+
+// CHECK-LABEL: define{{.*}} i32 @cbcdtd_test_ui(i32
+// CHECK-NEXT:  [[ENTRY:.*:]]
+// CHECK-NEXT:  [[CONV:%.*]] = zext i32 {{.*}} to i64
+// CHECK-NEXT:  [[TMP0:%.*]] = tail call i64 @llvm.ppc.cbcdtdd(i64 [[CONV]])
+// CHECK-NEXT:  [[CONV1:%.*]] = trunc i64 [[TMP0]] to i32
+// CHECK-NEXT:  ret i32 [[CONV1]]
+// CHECK-32-ERROR: error: this builtin is only available on 64-bit targets
+// CHECK-32-ERROR: #define __cbcdtd __builtin_ppc_cbcdtd
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chenzheng1030 wrote:

For `__cbcdtd`, 32-bit input is rejected. Otherwise, we may also need sign-ext before the `cbcdtd` instruction?

https://github.com/llvm/llvm-project/pull/101390