c0cfa4f53b
Since v71, broadcom hw include specific packing/conversion
instructions, so this commit adds opcodes to be able to make use of
them, specially for image stores:
* pack_2x16_to_unorm_2x8 (on backend vftounorm8/vftosnorm8):
2x16-bit floating point to 2x8-bit unorm/snorm
* f2unorm_16/f2snorm_16 (on backend ftounorm16/ftosnorm16):
floating point to 16-bit unorm/snorm
* pack_2x16_to_unorm_2x10/pack_2x16_to_unorm_10_2 (on backend
vftounorm10lo/vftounorm10hi): used to convert a floating point to
a r10g10b10a2 unorm
* pack_32_to_r11g11b10 (on backend v11fpack): packs 2 2x16 FP into
R11G11B10.
* pack_uint_32_to_r10g10b10a2 (on backend v10pack): pack 2 2x16
integer into R10G10B10A2
* pack_4x16_to_4x8 (on backend v8pack): packs 2 2x16 bit integer
into 4x8 bits.
* pack_2x32_to_2x16 (on backend vpack): 2x32 bit to 2x16 integer
pack
For the latter, it can be easly confused with the existing
pack_32_2x16_split. But note that this one receives two 16bit integer,
and packs them on a 32bit integer. But broadcom opcode takes two 32bit
integer, takes the lower halfword, and packs them as 2x16 on a 32bit
integer.
Interestingly broadcom also defines a similar one that packs the
higher halfword. Not used yet.
Note that at this point we use agnostic names, even if we add a _v3d
suffix as they are only available for broadcom, in order to follow
current NIR conventions.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25726>
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