[PATCH 0/6] Add Intel Sierra Forest Instructions

[Haochen Jiang via Gcc-patches]

Hi all,

These six patches aimed to add Intel Sierra Forest instructions, including
AVX-IFMA, AVX-VNNI0INT8, AVX-NE-CONVERT, CMPccXADD. We also added intrinsic
for vector __bf16 in this series of patch and Sierra Forest Support.

The information is based on newly released
Intel Architecture Instruction Set Extensions and Future Features.

The document comes following:
https://www.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html

Regtested on x86_64-pc-linux-gnu. Ok for trunk?

BRs,
Haochen