PPSA11386 registers 3840x2160 tiled display buffers in pixel format
0xC001000622000000, R16G16B16A16 float in KytyPS5 and SharpProspero
(0xC001000600000000 is the blue-first variant), and stops on "VideoOut:
unsupported display pixel format". The buffer is eight bytes per texel; its
tiled layout is assumed to be the 8-byte SW_64KB_R_X equation applied to
full coordinates, as addrlib applies it. The values are taken as linear
light and encoded with the sRGB curve for the 8-bit output. The encoding
compares the raw half-float bits against two tables of 255 thresholds
(color and alpha) that the CPU decode and the color transfer shader share,
so both give the same bytes on any driver; negative and NaN values give 0.
Guest-memory detile, the resident image path and the CPU decode all handle
both formats; DCC metadata on a float buffer throws. Neither the layout nor
the transfer is verified against console frames.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fnrk5Dazjb2tLooVSpdRQq
A waveform block that declares samples with no data threw as not
fitting them. PPSA04867 adds such a block with flags 0x11 (data_size 0,
num_samples 16385) and terminates the process on the throw, followed by
a fully specified block under the same flags, which takes the ordinary
path. Accept flag 0x10, named SILENCE here: a dataless block under it
renders num_samples frames of silence and finishes like a complete
block, reporting its bytes through decoded_data_size. A dataless block
without the flag keeps throwing. No public reference names the flag;
the assumption is recorded in TechnicalDebt.
Co-Authored-By: Claude Code <[email protected]>
The CFG used by unused-filter=1 followed only direct branches, so code reached
through lea, relative-relocated pointers or jump tables was unreachable and its
imports were dropped. It now roots RIP-relative lea targets, relative relocation
targets and relative jump tables, and counts any RIP-relative reference to a GOT
slot as an access. Address-taken targets are walked after the direct control
flow, and a target that does not decode as an instruction is not code.
ProsperoRadio (PPSA99001) imports six sceOpusCeltDec functions from
libSceOpusCeltDec and fails to load because no such module exists. It
opens this decoder only as a fallback when libSceOpusDec reports a
retryable error for a CELT packet, which libSceOpusDec here never
returns, so the module is exported without an implementation and each
function throws if it is called, as for sceSaveDataCancel.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Measured on RDNA2 (gfx1035) in review:
- the shared and private apertures are 4 GB windows (the gfx9+ layout of kfd_flat_memory.c), so a flat
address routes by its whole high dword, 0x80000000 or 0x70000000, not by its top 16 bits;
- a dword or short access whose last byte is past the end of LDS reads 0 or writes nothing as a whole;
multi-dword accesses are checked per dword.
The aperture test gets rows that straddle and pass the end of LDS; the TechnicalDebt line names the
public source of the layout and keeps only the PS5's base values as inferred.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
Sub-dword stores and unaligned dword accesses go byte-wise; 32- and 64-bit FLAT atomics
route to LDS (64-bit under the workgroup lock), scratch (read-modify-write) or BDA.
agc_driver_flat_apertures covers them in 121 rows, with mixed-address waves and wave64.
The aperture bases and the unmodelled operands 235-238 are listed as inferred.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
Directed FLOAT_MODE modes for v_cvt_f16_f32, v_cvt_f16_i16,
v_cvt_f16_u16 and v_ldexp_f16 were ignored, so results stayed
round-to-nearest-even. Hardware uses FLOAT_MODE bits 3:2 (round16);
the directed path runs only when f16 denormals are preserved.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Co-authored-by: Cursor <[email protected]>
Rosetta runs AVX2, FMA, BMI1/2, F16C and MOVBE, but, unlike an Intel
host, it has neither RDSEED, CLWB nor RDPID. --to-rosetta converts
everything --to-intel does and lowers these three as well:
- RDSEED becomes RDRAND (the /6 form of the same opcode), which also
returns a random value and sets CF.
- CLWB only writes a cache line back, so it becomes a NOP of the same
length.
- RDPID becomes a load of 0 through an optional stub: Rosetta's TSC_AUX
is a constant, not a processor index, so every thread reports
processor 0. A site with no movable instruction after it for the jump
is kept.
The flag implies --to-intel and conflicts with --windows. It is
independent of --macos: it only changes what the conversion produces, so
--macos alone leaves these instructions as they are, as on an Intel Mac,
and a title for Rosetta is relinked with --macos --to-rosetta. Intel
output is unchanged: the target is a parameter of the converter, Intel by
default.
Scalar f16 add/mul/sub ignore FLOAT_MODE denorm16 flush bits on main.
Flush inputs when bit 0 is clear and results when bit 1 is clear at
nearest-even. Multiply checks tininess after 11-bit rounding
(0x387ff000); add/sub use 0x38800000.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Co-authored-by: Cursor <[email protected]>
Keep WAIT_REG_MEM diagnostic timeouts from completing unsatisfied waits.
Register the existing gated-dispatch capture test with a 1ms diagnostic
timeout and document the missing-producer limitation.
Adrià