Native Codec SIMD Backends

Version 3.12.0 enables native SIMD acceleration for the bundled Windows compression and JPEG backends. zlib-ng Win64x objects include runtime-dispatched SSE2, SSSE3, SSE4.x, PCLMULQDQ, and AVX2 implementations; Win32 zlib-ng remains on the generic bcc32c object set for compatibility.

libjpeg-turbo now links jsimd.c plus NASM i386 and x86_64 SIMD objects on Win32 and Win64. Public JPEG APIs, image rendering behavior, and PDF output formats are unchanged.

The static C allocation stubs now return 32-byte aligned memory, and JPEG memory-backed output buffers are released through the matching C free path. memcpy and memmove continue to use the Delphi RTL Move implementation.

Validation for 3.12.0 covered third-party native object rebuilds, Delphi Win32 and Win64 DUnitX suites with 132 tests each, the C++Builder Win64x GoogleTest suite with 56 tests, and reference-document export checks.