target-tricore: Add instructions of RR opcode format, that have 0xb as the first opcode

Add instructions of RR opcode format, that have 0xb as the first opcode.
Add helper functions, for hword and byte arithmetics:
    * add_h_ssov/suov: Add two halfword and saturate on overflow.
    * sub_h_ssov/suov: Sub two halfword and saturate on overflow.
    * absdif_h_ssov: Compute absolute difference for halfwords and saturate on overflow.
    * abs_h_ssov/suov: Compute absolute value for two halfwords and saturate on overflow.
    * abs_b/h: Compute absolute value for four/two bytes/halfwords
    * absdif_b/h: Compute absolute difference for four/two bytes/halfwords
    * add_b/h: Add four/two bytes/halfwords.
    * sub_b/h: Sub four/two bytes/halfwords.
    * eq_b/h: Compare four/two bytes/halfwords with four/two bytes/halfwords on
              equality and set all bits of to either one ore zero.
    * eqany_b/h: Compare four/two bytes/halfwords with four/two bytes/halfwords on equality.
    * lt_b/bu/h/hu: Compare four/two bytes/halfwords with four/two bytes/halfwords
                    on less than signed and unsigned.
    * max_b/bu/h/hu: Calculate max for four/two bytes/halfwords signed and unsigned.
    * min_b/bu/h/hu: Calculate min for four/two bytes/halfwords signed and unsigned.
Add helper function abs_ssov, that computes the absolute value for a 32 bit integer and saturates on overflow.
Add microcode generator functions:
    * gen_sub_CC: Caluclates sub and sets the carry bit.
    * gen_subc_CC: Caluclates sub and carry and sets the carry bit
    * gen_abs: Compute absolute value for a 32 bit integer.
    * gen_cond_w: Compares two 32 bit values on cond and sets result either zero or all bits one.

OPC2_32_RR_MIN switched with OPC2_32_RR_MIN_U.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
