whisper : document POWER VSX support

Author: fitzsim

README.md

@@ -11,6 +11,7 @@ High-performance inference of [OpenAI's Whisper](https://github.com/openai/whisp
 - Plain C/C++ implementation without dependencies
 - Apple silicon first-class citizen - optimized via Arm Neon and Accelerate framework
 - AVX intrinsics support for x86 architectures
+- VSX intrinsics support for POWER architectures
 - Mixed F16 / F32 precision
 - Low memory usage (Flash Attention + Flash Forward)
 - Zero memory allocations at runtime

ggml.c

@@ -8232,4 +8232,12 @@ int ggml_cpu_has_blas(void) {
 #endif
 }
 
+int ggml_cpu_has_vsx(void) {
+#if defined(__POWER9_VECTOR__)
+    return 1;
+#else
+    return 0;
+#endif
+}
+
 ////////////////////////////////////////////////////////////////////////////////

ggml.h

@@ -731,6 +731,7 @@ int ggml_cpu_has_f16c(void);
 int ggml_cpu_has_fp16_va(void);
 int ggml_cpu_has_wasm_simd(void);
 int ggml_cpu_has_blas(void);
+int ggml_cpu_has_vsx(void);
 
 #ifdef  __cplusplus
 }

whisper.cpp

@@ -2582,6 +2582,7 @@ const char * whisper_print_system_info(void) {
     s += "FP16_VA = "   + std::to_string(ggml_cpu_has_fp16_va())   + " | ";
     s += "WASM_SIMD = " + std::to_string(ggml_cpu_has_wasm_simd()) + " | ";
     s += "BLAS = "      + std::to_string(ggml_cpu_has_blas())      + " | ";
+    s += "VSX = "       + std::to_string(ggml_cpu_has_vsx())       + " | ";
 
     return s.c_str();
 }