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Revision c1cf85c9

IDc1cf85c9acb847c4871c0b241ced8fabf410d502

Added by Aurelien Jarno over 11 years ago

tcg/mips: optimize bswap{16,16s,32} on MIPS32R2

bswap operations can be optimized on MIPS32 Release 2 using the ROTR,
WSBH and SEH instructions. We can't use the non-R2 code to implement the
ops due to registers constraints, so don't define the corresponding
TCG_TARGET_HAS_bswap* values.

Also bswap16* operations are supposed to be called with the 16 high bits
zeroed. This is the case everywhere (including for TCG by definition)
except when called from the store helper. Remove the AND instructions from
bswap16* and move it there.

Reviewed-by: Richard Henderson <>
Signed-off-by: Aurelien Jarno <>

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