Adrià FranchandClaude 11bc279945 feat(shader): implement v_div_scale_f32, v_div_fmas_f32, v_div_fixup_f32 and s_denorm_mode ...

These make up the precise f32 division macro compilers emit for a / b. No
reference emulator implements them and the ISA pseudocode disagrees with the
hardware, so the rules were measured on an RDNA2 GPU:
- div_scale decides from the exponent fields only: 2^64 or 2^-64 scaling
  and VCC for differences >= 96 or <= -96, a denormal or huge (>= 253)
  denominator and a numerator exponent <= 24; a zero input gives 0xffc00000.
- div_fmas scales by 2^64 when the exponent of S2 is >= 128, else 2^-64,
  before the single rounding (the ISA says a fixed 2^32).
- div_fixup follows the ISA, and a NaN quotient with finite inputs becomes
  +-inf.
s_denorm_mode is accepted and ignored; listed in TechnicalDebt.

Co-Authored-By: Claude <[email protected]>

2026-10-04 12:05:33 +02:00

..

BUILD.md

docs(usage): add relinker usage md doc

2026-10-02 21:50:35 +03:00

CONVENTIONS.md

refactor(docs): separated user and dev in docs + compatibility file

2026-09-28 22:58:17 +03:00

TechnicalDebt.md

feat(shader): implement v_div_scale_f32, v_div_fmas_f32, v_div_fixup_f32 and s_denorm_mode

2026-10-04 12:05:33 +02:00