[PowerPC] Support for Packed BCD conversion builtins (#142723)

Support the following packed BCD builtins for PowerPC.
  
```
__builtin_national2packed - Conversion of National format to Packed decimal format.
__builtin_packed2national - Conversion of Packed decimal format to national format.
__builtin_packed2zoned    - Conversion of Packed decimal format to Zoned decimal format.
__builtin_zoned2packed    - Conversion of Zoned decimal format to Packed decimal format.
```
### Prototypes: 
`vector unsigned char __builtin_national2packed(vector unsigned char a,
unsigned char b);`
`vector unsigned char __builtin_packed2zoned(vector unsigned char,
unsigned char);`
`vector unsigned char __builtin_zoned2packed(vector unsigned char,
unsigned char);`

The condition for the 2nd parameter is consistent over all the 3
prototypes (0 or 1 only).

`vector unsigned char __builtin_packed2national(vector unsigned char);`

Co-authored-by: himadhith <himadhith.v@ibm.com>
Co-authored-by: Tony Varghese <tonypalampalliyil@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index 77145e2..05a5dc2 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -89,6 +89,12 @@ bool PPCTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
 }
 
 static void defineXLCompatMacros(MacroBuilder &Builder) {
+  Builder.defineMacro("__builtin_national2packed",
+                      "__builtin_ppc_national2packed");
+  Builder.defineMacro("__builtin_packed2national",
+                      "__builtin_ppc_packed2national");
+  Builder.defineMacro("__builtin_packed2zoned", "__builtin_ppc_packed2zoned");
+  Builder.defineMacro("__builtin_zoned2packed", "__builtin_ppc_zoned2packed");
   Builder.defineMacro("__cdtbcd", "__builtin_ppc_cdtbcd");
   Builder.defineMacro("__cbcdtd", "__builtin_ppc_cbcdtd");
   Builder.defineMacro("__addg6s", "__builtin_ppc_addg6s");