SPI_PS_INPUT_ENA/ADDR with PERSP_CENTROID (bit 2) or LINEAR_CENTROID
(bit 6) was rejected; PPSA21564 binds 0x326 (perspective center and
centroid, linear center, POS_X/Y).
The PS input VGPR layout now follows the hardware rule: SPI_PS_INPUT_ADDR
places every input it names in SPI order (two VGPRs per I/J pair, three
for the pull model, one otherwise), loaded or not, and ENA & ADDR selects
the loaded ones. ShaderPixelStageInfo carries inputAddr (replacing
perspectiveCenterVgpr) plus perspectiveCentroid and linearCentroid; the
recompiler places each loaded input with PixelInputVgpr. This also fixes
the system inputs, which were always written from v0 (psSystemInputBase
was never set), so POS_X overwrote the center I in any draw with
barycentrics enabled.
Draws are rasterized single-sampled, where the centroid is the pixel
center: with fragment barycentrics the centroid pairs carry the center
barycentrics (BaryCoordKHR for perspective; the linear center and
centroid pairs now get BaryCoordNoPerspKHR).
NoPerspective was decided for every parameter by one flag (LINEAR_CENTER
loaded). v_interp_p2 now records whether it reads the J of a linear or a
perspective pair, and a parameter is NoPerspective when it is read
through a linear pair; parameters read through neither keep the old
rule. A parameter read through both kinds of pair throws. Only pixel
stages consult this.
The request serializer moves to version 5 (older requests read back with
their loaded inputs as the layout); the cache key and the driver's draw
key compare and hash the new fields. The unsupported-input error names
ENA and ADDR.
cb66ec2004