From 040d9c67942c73d875eec9a2ab131fbae6e8f984 Mon Sep 17 00:00:00 2001 From: Bernhard Schommer Date: Mon, 12 Aug 2019 16:16:10 +0200 Subject: 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. --- arm/Asmexpand.ml | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arm') 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) -> -- cgit