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* Adjustment: Utilize native compiler intrinsics for endian swapping when available.

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This commit is contained in:
Robert MacGregor 2021-10-07 09:59:03 -04:00
parent 026409ed7f
commit 15b946fb35
3 changed files with 22 additions and 5 deletions
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13
Engine/source/core/util/endian.h
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@ -48,8 +48,12 @@ Convert the byte ordering on the U16 to and from big/little endian format.
inline U16 endianSwap(const U16 in_swap)
{
#ifdef TORQUE_U16_ENDIANSWAP_BUILTIN
return TORQUE_U16_ENDIANSWAP_BUILTIN(in_swap);
#else
return U16(((in_swap >> 8) & 0x00ff) |
((in_swap << 8) & 0xff00));
#endif
}
inline S16 endianSwap(const S16 in_swap)
@ -64,10 +68,14 @@ Convert the byte ordering on the U32 to and from big/little endian format.
*/
inline U32 endianSwap(const U32 in_swap)
{
#ifdef TORQUE_U32_ENDIANSWAP_BUILTIN
return TORQUE_U32_ENDIANSWAP_BUILTIN(in_swap);
#else
return U32(((in_swap >> 24) & 0x000000ff) |
((in_swap >> 8) & 0x0000ff00) |
((in_swap << 8) & 0x00ff0000) |
((in_swap << 24) & 0xff000000));
#endif
}
inline S32 endianSwap(const S32 in_swap)
@ -77,12 +85,16 @@ inline S32 endianSwap(const S32 in_swap)
inline U64 endianSwap(const U64 in_swap)
{
#ifdef TORQUE_U64_ENDIANSWAP_BUILTIN
return TORQUE_U64_ENDIANSWAP_BUILTIN(in_swap);
#else
U32 *inp = (U32 *) &in_swap;
U64 ret;
U32 *outp = (U32 *) &ret;
outp[0] = endianSwap(inp[1]);
outp[1] = endianSwap(inp[0]);
return ret;
#endif
}
inline S64 endianSwap(const S64 in_swap)
@ -138,4 +150,3 @@ TORQUE_DECLARE_TEMPLATIZED_ENDIAN_CONV(F32)
TORQUE_DECLARE_TEMPLATIZED_ENDIAN_CONV(F64)
#endif