x86: Allow TImode offsettable memory only with 8-bit constant
The x86 instruction size limit is 15 bytes. If a NDD instruction has
a segment prefix byte, a 4-byte opcode prefix, a MODRM byte, a SIB byte,
a 4-byte displacement and a 4-byte immediate, adding an address size
prefix will exceed the size limit. Change TImode ADD, AND, OR and XOR
to allow offsettable memory only with 8-bit signed integer constant,
which is encoded with a 1-byte immediate, if the address size prefix
is used.
gcc/
PR target/114696
* config/i386/i386.md (isa): Add apx_ndd_64.
(enabled): Likewise.
(*add<dwi>3_doubleword): Change rjO to r,ro,jO with 8-bit
signed integer constant and enable jO only for apx_ndd_64.
(*add<dwi>3_doubleword_cc_overflow_1): Likewise.
(*and<dwi>3_doubleword): Likewise.
(*<code><dwi>3_doubleword): Likewise.