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| author | Bernhard Schommer <bschommer@users.noreply.github.com> | 2019-08-12 16:16:10 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2019-08-12 16:16:10 +0200 |
| commit | 040d9c67942c73d875eec9a2ab131fbae6e8f984 (patch) | |
| tree | 13a98dd663fb8b7a7824d3fc629a9ab2e9301e98 /arm/Asmexpand.ml | |
| parent | 2ce5e496b8d4c838c87c9f00a84ed23d1abc26fc (diff) | |
| download | compcert-kvx-040d9c67942c73d875eec9a2ab131fbae6e8f984.tar.gz compcert-kvx-040d9c67942c73d875eec9a2ab131fbae6e8f984.zip | |
bswap builtins: give semantics to them, support bswap64 on all targets
* Added semantic for byte swap builtins
The `__builtin_bswap`, `__builtin_bswap16`, `__builtin_bswap32`, `__builtin_bswap64` builtin function are now standard builtin functions with a defined semantics.
The semantics is given in terms of the decode/encode functions used for the memory model.
* Added bswap64 expansion to PowerPC 32 bits.
* Added bswap64 expansion for ARM.
Diffstat (limited to 'arm/Asmexpand.ml')
| -rw-r--r-- | arm/Asmexpand.ml | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arm/Asmexpand.ml b/arm/Asmexpand.ml index d9424d11..a4ec0c5d 100644 --- a/arm/Asmexpand.ml +++ b/arm/Asmexpand.ml @@ -304,6 +304,11 @@ let expand_builtin_va_start r = let expand_builtin_inline name args res = match name, args, res with (* Integer arithmetic *) + | "__builtin_bswap64" , [BA_splitlong(BA(IR ah), BA(IR al))], + BR_splitlong(BR(IR rh), BR(IR rl)) -> + expand_int64_arith (rl = al) rl (fun rl -> + emit (Prev (rl, ah)); + emit (Prev (rh, al))) | ("__builtin_bswap" | "__builtin_bswap32"), [BA(IR a1)], BR(IR res) -> emit (Prev (res, a1)) | "__builtin_bswap16", [BA(IR a1)], BR(IR res) -> |