[PATCH] i386: Integrate BFmode for Enhanced Vectorization in ix86_preferred_simd_mode

[Levy Hsu]

Hi

This change adds BFmode support to the ix86_preferred_simd_mode function
enhancing SIMD vectorization for BF16 operations. The update ensures
optimized usage of SIMD capabilities improving performance and aligning
vector sizes with processor capabilities.

Bootstrapped and tested on x86-64-pc-linux-gnu. 
Ok for trunk?

gcc/ChangeLog:

        * config/i386/i386.cc (ix86_preferred_simd_mode): Add BFmode Support.
---
 gcc/config/i386/i386.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 7af9ceca429..aea138c85ad 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -24570,6 +24570,14 @@ ix86_preferred_simd_mode (scalar_mode mode)
        }
       return word_mode;
 
+    case E_BFmode:
+      if (TARGET_AVX512F && TARGET_EVEX512 && !TARGET_PREFER_AVX256)
+       return V32BFmode;
+      else if (TARGET_AVX && !TARGET_PREFER_AVX128)
+       return V16BFmode;
+      else
+       return V8BFmode;
+
     case E_SFmode:
       if (TARGET_AVX512F && TARGET_EVEX512 && !TARGET_PREFER_AVX256)
        return V16SFmode;
-- 
2.31.1