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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32347 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-12-08 02:01:32 +00:00
parent 3b14fbe300
commit f9bae438aa
1 changed files with 10 additions and 0 deletions
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10
lib/Target/README.txt
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@ -303,6 +303,16 @@ unsigned int swap_32(unsigned int v) {
return v;
}
Nor is this (yes, it really is bswap):
unsigned long reverse(unsigned v) {
unsigned t;
t = v ^ ((v << 16) | (v >> 16));
t &= ~0xff0000;
v = (v << 24) | (v >> 8);
return v ^ (t >> 8);
}
//===---------------------------------------------------------------------===//
These should turn into single 16-bit (unaligned?) loads on little/big endian