The f32 conversions that only flush their inputs follow bit 0 of the
FLOAT_MODE f32 denormal field, as the f32 compares do: mode 1 keeps
denormal inputs like mode 3 and mode 2 flushes them like mode 0.
v_cvt_pk_u8_f32 also follows a round mode set at run time.
Measured on RDNA2 (gfx1036) with the hardware oracle.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
ShaderCacheVersion.cmake resolved every source's real path twice and
every include's real path once per include line: 1102 REALPATH calls
per run, about 1.6 ms each on Windows. Reuse the source paths from the
first pass and resolve each include path once. The generated version
file is unchanged.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The specialized module caches (by variant and constants, by binding plan
and by registration key) and the SPIR-V interning table held every
module's words for the rest of the run, after the results that used them
were gone. They now keep a module's interface (bindings, push data,
specialization ID and content hash) and only a weak reference to its
words; a lookup after the words were released builds them again from the
same key, checks the content hash, and keeps the specialization ID that
names the module's pipelines. The interning table keeps weak references
and drops expired ones from the bucket it searches.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
A local program that keeps the relative patch index only on inactive
lanes, or in a vector-window slot nothing reloads, was refused as a
data use. Follow the index through the values that carry it, and
refuse only when a side effect still observes it.
A shader source loading its resource plan from the disk cache decoded
its own copy, also when another source had already loaded the same
plan: the same code registered under another plan key (another host
subgroup size or interface) stores byte-identical plan entries. In Ghost
of Tsushima's cache, 14,043 plan entries hold 8,170 distinct payloads.
Loaded plans now go through a table of weak references keyed by two
hashes of the payload, its size and the shader address the plan carries,
so equal payloads for one shader decode once and share the plan, its
compact form and its compiled SRT tape while any source uses it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
A resource block behind v_cmpx_gt_u32 exec, s, v0 and s_cbranch_execz keeps
its condition only if the compare can decide it, but UGreaterThan32 and
ULessThan32 needed both operands and v0 is a lane value. When the uniform
operand is 0 (or 0xffffffff on the other side) no lane can pass the compare,
so the walk can skip the block without the lane value.
UGreaterThan32 now yields false when its first operand is 0 or its second is
0xffffffff, and ULessThan32 when its first is 0xffffffff or its second is 0,
in the SRT interpreter and in the SRT tape alike; MayDecide keeps such a
condition when either operand is evaluable. Fully evaluable compares are
unchanged.
Destruction AllStars (PPSA02630) dispatches compute shader 0x200a220000 with
a thread count of 0 and leaves the V# in the skipped block stale (one
dispatch holds 00000000 00000000 00000000 ffffffff), which stopped it at
about 40 s with "buffer descriptor uses an unsupported type".
Co-Authored-By: Claude Opus 5.5 <[email protected]>
image_get_resinfo returns 0 in its third component when the instruction's
DIM has no layers (1D, 2D, 2D MSAA) and the T# is not 3D, as measured on
RDNA 2 in #7550. Keep 1D-array T#s on their first layer and MSAA T#s
refused, and record the unmeasured forms in the shader debt file.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
image_get_resinfo with DIM 1D on a cube, 3D or 2D-array T# was refused
with "image address has too few coordinate components": the tracker made
a 1D image that only the query uses, and no 1D mode matches such a T#.
The returned size, layer count and levels come from the T#; DIM only sets
the number of address registers. A 1D image used only by dimension
queries now decodes the T#'s own dimension and accepts 2D, 1D array,
2D array, 3D and cube views.
The flag is stored in the shader disk cache, so FormatVersion moves to 38.
PPSA01317 queries a 64x64 cube with DIM 1D in a pixel shader.
AI-assisted: yes
Every recompile cache key appended the target's capability list and
each SPIR-V extension name one byte per 64-bit word, so on a device that
enables a few dozen extensions most of every key was the same device
description: built and compared on every dispatch and draw, and kept in
every in-memory key and disk cache entry. The two lists now enter the key
as a 128-bit digest over the capabilities and the length and bytes of
each extension name, eight bytes per step.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Table T#s keyed at runtime feeding image_atomic64_* now lower to
OpAtomic* on the table Atomic64View instead of faulting, mirroring
the 32-bit path: gate, dedup identity, binding flags and view
selection. Packed formats and BY element counts still fault; hosts
need VK_FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT for the view format.
Dean