Re: [Qemu-devel] [PATCH v2 2/8] target-tricore: Add instructions of RR opcode format, that have 0xb as the first opcode

[Richard Henderson]

On 12/17/2014 09:59 AM, Bastian Koppelmann wrote:
> 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 <address@hidden>
> ---
> v1 -> v2:
>     - gen_cond_w now uses neg and saves a temp.
>     - SSOV16/SUOV16 are now regular functions.
>     - Use TCG_CALL_NO_RWG_SE for all helpers not using globals.

Reviewed-by: Richard Henderson <address@hidden>


r~