A subnormal operand sent v_fma_f64 to a separate multiply and add, and a
subnormal result was rounded twice: once to 53 bits in the scaled domain
and again by the power-of-two rescale. Both differ from IEEE 754
fusedMultiplyAdd in the last bit.
Subnormal operands are now widened by 2^64 and enter the exact path with
their exponent lowered by 64. The exact path keeps the sign of the residual
between the 53-bit result and the exact sum; when the result lands on a
midpoint of the subnormal grid it is moved one ulp towards the exact sum
before the single final rounding. Normal results are rebuilt by setting
the exponent, so only a subnormal result rounds. v_div_fmas_f64 shares the
path.
Each Windows AIO request is an overlapped ReadFile/WriteFile at the
request's offset, which on a synchronous handle also moves the
descriptor's file pointer; on the console AIO transfers leave it alone.
The requests now go through the positioned path sceKernelPread and
sceKernelPwrite use (NativePositioned in Stdio.cpp, exposed as
NativePositioned_nid_no_patch), which restores the pointer afterwards.
Negative offsets still fail with EINVAL before the transfer.
GuestAio sets the offset to 2 before a write batch and checks it is
still 2 after. TechnicalDebt records that a concurrent read or write on
the same descriptor can see the moved pointer in between, as for the
pread family.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01UTjpbMX7BUFMZZaxJE98zV
Keeps both new TechnicalDebt entries: this branch's note that a raise
can still reenter host code it interrupted, and #2107's sigaltstack note.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
read, write, _read and _write on a guest socket descriptor went to the
host, which has no such descriptor, so sceKernelRead and sceKernelWrite
threw. They now reach the socket as recv and send without flags, with
the socket layer's errno (EAGAIN 35, EPIPE 32, EBADF 9), a zero-length
read returns 0 as dofileread does, and the two sceKernel forms return
the kernel error for the same cases. The host's SIGPIPE on EPIPE, a
write above INT_MAX bytes, readv, writev and the positioned forms are
recorded in TechnicalDebt.
OpenSSL's QUIC notifier signals its socketpair with write and read.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
The status layout is shadPS4's OrbisGameLiveStreamingStatus2 (72
bytes). Live streaming is not supported, so the call reports that no
stream is on air, with an invalid user id; a null status throws.
Uncharted: Legacy of Thieves Collection (PPSA05684) stopped at sceGameLiveStreamingGetCurrentStatus2.
msync follows FreeBSD 11's kern_msync and vm_map_sync over the guest's
mappings as sceKernelVirtualQuery reports them: the address is rounded
down to the page, a range that wraps and MS_ASYNC with MS_INVALIDATE are
EINVAL, an unmapped start or page is ENOMEM, and length 0 checks the
mapping that holds the address. The guest has no file mappings, so a
successful call has nothing to write back. MS_INVALIDATE on a mapped
range throws, since FreeBSD's EBUSY for mlocked pages needs lock state
that is not tracked.
EVO-PLAYER PPSA99039 v0.11.0 imports it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The IME panel cannot be open while sceImeOpen is unimplemented, so the
query returns SCE_IME_ERROR_NOT_OPENED and leaves the output untouched,
like sceImeSetCaret, sceImeSetText and sceImeSetTextGeometry. As with
sceImeSetCaret, the closed panel is reported before a null output.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
shadPS4 returns success for an object id that was never reserved and the invalid-object error only for a released one; this library returns the error for both.
Co-Authored-By: Claude <[email protected]>
Both exports are imported by titles that link libSceAudio3d; without them the loader fails with an unresolved import before the title runs. Following the offline model, object attributes are validated but produce no audio and PortFlush drops the frames queued by sceAudio3dPortAdvance.
Pan follows the PS4 firmware 11.00 libSceNgs2.sprx: the speaker layout
from the init angles, then each param's angle and distance into a
volume matrix for the voice. Every param is checked before anything is
written, and angles too large to wrap throw. The pan functions are
exported from the existing Voice.cpp export block.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
C17 has no binary prefix: with base 0 or 2, strtol("0b101", &end, base)
reads the subject "0", returns 0 and leaves end at the 'b'. With glibc
2.38 or later, g++ (which defines _GNU_SOURCE) binds std::strtoll,
strtoull, strtoul, strtoimax and strtoumax to the C23 __isoc23_*
functions, which accept 0b/0B: the Linux exports returned 5 and
consumed the whole string. The Windows UCRT already follows C17, so the
same guest call gave different results on the two hosts.
strtol, strtoul, strtoll, strtoull, _Stoull, strtoimax, strtoumax and
_Stoul now return 0 with the end pointer after the '0' when, after
white space and an optional sign, the text starts with 0b or 0B and a
binary digit, in base 0 or 2. Everything else still goes to the host
function. The scanf family's %i has the same glibc behaviour; it is
recorded in TechnicalDebt.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Nahuel Genchi