As on RISC-V: the accurate dot products called the IR interpreter. Now the JIT calls a routine
generated at startup, vfpu_dot_lsx() with LSX (the operands go in v8 and v9) and vfpu_dot_scalar()
without (through mips->vfpuDotArgs), with inf and NaN going to vfpu_dot_reference(). With LSX, a
result that lands in one of the operands' Vec4s goes in with VEXTRINS.
VFPUDotJit covers both versions.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>