From e637d041c5c2ee3a3ed395a7dab6c9101e8eb16c Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Sat, 1 Oct 2016 17:25:18 +0200 Subject: Support for 64-bit architectures: generic support - Introduce Archi.ptr64 parameter. - Define module Ptrofs of integers as wide as a pointer (64 if Archi.ptr64, 32 otherwise). - Use Ptrofs.int as the offset type for Vptr values and anywhere pointer offsets are manipulated. - Modify Val operations that handle pointers (e.g. Val.add, Val.sub, Val.cmpu) so that in 64-bit pointer mode it is the "long" operation (e.g. Val.addl, Val.subl, Val.cmplu) that handles pointers. - Update the memory model accordingly. - Modify C operations that handle pointers (e.g. addition, subtraction, comparisons) accordingly. - Make it possible to turn off the splitting of 64-bit integers into pairs of 32-bit integers. - Update the compiler front-end and back-end accordingly. --- test/regression/alias.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'test/regression') diff --git a/test/regression/alias.c b/test/regression/alias.c index 9887ae2b..925979cb 100644 --- a/test/regression/alias.c +++ b/test/regression/alias.c @@ -69,14 +69,14 @@ int get4(void) return x; } -/* Byte-swapping a pointer */ +/* Byte-swapping a pointer. For 32/64 bit compatibility, we just swap + the two low bytes, but that's in the spirit. */ inline uintptr_t bswap(uintptr_t x) { - return (x >> 24) - | (((x >> 16) & 0xFF) << 8) - | (((x >> 8) & 0xFF) << 16) - | ((x & 0xFF) << 24); + return (x & ~((uintptr_t) 0xFFFF)) + | ((x >> 8) & 0xFF) + | ((x << 8) & 0xFF00); } void NOINLINE set5(uintptr_t x) -- cgit