Only check hardware when option is ON

Author: howard0su

CMakeLists.txt

@@ -147,33 +147,32 @@ MACRO(CHECK_SSE type flags)
 
 ENDMACRO()
 
-CHECK_SSE("AVX" " ;-mavx;/arch:AVX")
-CHECK_SSE("AVX2" " ;-mavx2 -mfma;/arch:AVX2")
-CHECK_SSE("AVX512" " ;-mavx512f -mavx512dq -mavx512vl -mavx512bw -mfma;/arch:AVX512")
-CHECK_SSE("FMA" " ;-mfma;")
-
-IF(${AVX_FOUND})
-  set(LLAMA_AVX ON)
-ELSE()
-  set(LLAMA_AVX OFF)
+IF(${LLAMA_AVX})
+    CHECK_SSE("AVX" " ;-mavx;/arch:AVX")
+    IF(NOT ${AVX_FOUND})
+        set(LLAMA_AVX OFF)
+    ENDIF()
 ENDIF()
 
-IF (${FMA_FOUND})
-  set(LLAMA_FMA ON)
-ELSE()
-  set(LLAMA_FMA OFF)
+IF(${LLAMA_AVX2})
+    CHECK_SSE("AVX2" " ;-mavx2 -mfma;/arch:AVX2")
+    IF(NOT ${AVX2_FOUND})
+        set(LLAMA_AVX2 OFF)
+    ENDIF()
 ENDIF()
 
-IF(${AVX2_FOUND})
-  set(LLAMA_AVX2 ON)
-ELSE()
-  set(LLAMA_AVX2 OFF)
+IF(${LLAMA_AVX512})
+    CHECK_SSE("AVX512" " ;-mavx512f -mavx512dq -mavx512vl -mavx512bw -mfma;/arch:AVX512")
+    IF(NOT ${AVX512_FOUND})
+        set(LLAMA_AVX512 OFF)
+    ENDIF()
 ENDIF()
 
-IF(${AVX512_FOUND})
-  set(LLAMA_AVX512 ON)
-ELSE()
-  set(LLAMA_AVX512 OFF)
+IF(${LLAMA_FMA})
+    CHECK_SSE("FMA" " ;-mfma;")
+    IF (NOT ${FMA_FOUND})
+        set(LLAMA_FMA OFF)
+    ENDIF()
 ENDIF()
 
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