x86: Fix overlap issue with INCSS/RDSSP

[Sleigh-InSPECtor]

INCSSQ/RDSSPQ (64-bit variants) are incorrectly decoded as INCSSPD/RDSSPD (32-bit variants).

The 32-bit variants include the constraint (opsize=0 | opsize=1 | opsize=2 | opsize=3) which essentially doesn't constraint the constructor at all (since opsize is a 2-bit field and this covers all combinations). However, this does appear to affect constructor ordering, since it means the 64-bit variants are not strictly more constrained than the 32-bit one and the 32-bit variants appear first in the sleigh source code so are matched first.

The 64-bit variant should be used when REX.W is present which implies opsize=2 (or opsize=3 if a 0x66 prefix is present), so these need to be removed from the allowed opsize values for the 32-bit variant.

By removing all of the opsize constraints, the 64-bit variants are now strictly more constrained than the 32-bit variant causing the decoder to match them if a REX.W prefix is present before checking 32-bit variant. This also matches the way the constraints are written for WRSSD.

e.g.

f3480faee8: "INCSSPQ RAX"

• x86:LE:64:default (Existing): "INCSSPD EAX"
• x86:LE:64:default (This patch): "INCSSPQ RAX"