[PATCH] D26519: [PowerPC] Implement BE VSX load/store builtins - clang portion.

[Tony Jiang via llvm-commits]

jtony created this revision.
jtony added reviewers: nemanjai, amehsan, kbarton, sfertile, syzaara, lei.
jtony added subscribers: cfe-commits, echristo, llvm-commits.

This patch implements all the overloads for vec_xl_be and vec_xst_be. On BE,
they behaves exactly the same with vec_xl and vec_xst, therefore they are
simply implemented by defining a matching macro. On LE, they are implemented
by defining new builtins and intrinsics. For int/float/long long/double, it
is just a load (lxvw4x/lxvd2x) or store(stxvw4x/stxvd2x). For char/char/short,
we also need some extra shuffling before or after call the builtins to get the
desired BE order. For int128, simply call vec_xl or vec_xst.

Signatures:
vector signed char vec_xl_be (signed long long, signed char *);
vector unsigned char vec_xl_be (signed long long, unsigned char *);
vector signed int vec_xl_be (signed long long, signed int *);
vector unsigned int vec_xl_be (signed long long, unsigned int *);
vector signed __int128 vec_xl_be (signed long long, signed __int128 *);
vector unsigned __int128 vec_xl_be (signed long long, unsigned __int128 *);
vector signed long long vec_xl_be (signed long long, signed long long *);
vector unsigned long long vec_xl_be (signed long long, unsigned long long *);
vector signed short vec_xl_be (signed long long, signed short *);
vector unsigned short vec_xl_be (signed long long, unsigned short *);
vector double vec_xl_be (signed long long, double *);
vector float vec_xl_be (signed long long, float *);
void vec_xst_be (vector signed char, signed long long, signed char *);
void vec_xst_be (vector unsigned char, signed long long, unsigned char *);
void vec_xst_be (vector signed int, signed long long, signed int *);
void vec_xst_be (vector unsigned int, signed long long, unsigned int *);
void vec_xst_be (vector signed __int128, signed long long, signed __int128 *);
void vec_xst_be (vector unsigned __int128, signed long long, unsigned __int128 *);
void vec_xst_be (vector signed long long, signed long long, signed long long *);
void vec_xst_be (vector unsigned long long, signed long long, unsigned long long *);
void vec_xst_be (vector signed short, signed long long, signed short *);
void vec_xst_be (vector unsigned short, signed long long, unsigned short *);
void vec_xst_be (vector double, signed long long, double *);
void vec_xst_be (vector float, signed long long, float *);


https://reviews.llvm.org/D26519

Files:
  include/clang/Basic/BuiltinsPPC.def
  lib/CodeGen/CGBuiltin.cpp
  lib/Headers/altivec.h
  test/CodeGen/builtins-ppc-altivec.c
  test/CodeGen/builtins-ppc-quadword.c
  test/CodeGen/builtins-ppc-vsx.c

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