[PATCH vkd3d 3/5] vkd3d-shader/hlsl: Write SM4 negation instructions.

Zebediah Figura (she/her) zfigura at codeweavers.com
Tue Aug 31 20:24:50 CDT 2021


On 8/31/21 6:33 PM, Matteo Bruni wrote:
> On Mon, Aug 30, 2021 at 7:21 PM Zebediah Figura <zfigura at codeweavers.com> wrote:
>>
>> Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
>> ---
>>   Makefile.am                  |  5 +----
>>   libs/vkd3d-shader/hlsl_sm4.c | 32 ++++++++++++++++++++++++++++++++
>>   2 files changed, 33 insertions(+), 4 deletions(-)
> 
>> diff --git a/libs/vkd3d-shader/hlsl_sm4.c b/libs/vkd3d-shader/hlsl_sm4.c
>> index ace2eb66..160da47f 100644
>> --- a/libs/vkd3d-shader/hlsl_sm4.c
>> +++ b/libs/vkd3d-shader/hlsl_sm4.c
>> @@ -561,6 +561,7 @@ struct sm4_register
>>       unsigned int idx_count;
>>       enum vkd3d_sm4_dimension dim;
>>       uint32_t immconst_uint[4];
>> +    unsigned int mod;
>>   };
>>
>>   struct sm4_instruction
>> @@ -710,6 +711,8 @@ static uint32_t sm4_register_order(const struct sm4_register *reg)
>>       if (reg->type == VKD3D_SM4_RT_IMMCONST)
>>           order += reg->dim == VKD3D_SM4_DIMENSION_VEC4 ? 4 : 1;
>>       order += reg->idx_count;
>> +    if (reg->mod)
>> +        ++order;
>>       return order;
>>   }
> 
> Something that came to my mind at least twice while looking at that
> function... Do you know e.g. by random looks to DXC's sources what the
> size of a register in the bytecode is supposed to be called? "Order"
> feels like a curious choice for a name.
> 
> No need to go investigate, just wondering if you happened to see anything.
> 

I recently discovered that the SM4 format is effectively documented in 
headers released with the DDK, namely "d3d10tokenizedprogramformat.hpp" 
and similar. Anyway, their version of SM4_REGISTER_ORDER_* is 
D3D10_SB_OPERAND_INDEX_DIMENSION_*.



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