add blas integer model 32

Author: galabovaa

CMakeLists.txt

@@ -150,6 +150,8 @@ option(HIPO "Build HIPO" OFF)
 message(STATUS "Build HIPO: ${HIPO}")
 option(BUILD_OPENBLAS "Build OpenBLAS" OFF)
 message(STATUS "Build OpenBLAS: ${BUILD_OPENBLAS}")
+option(OPENBLAS_WIN_32 "Build 32bit OpenBLAS on Windows" OFF)
+
 if (HIPO AND CSHARP)
   message(ERROR "HIPO is only available in C++. Not yet supported in C#.")
 endif()

cmake/FindHipoDeps.cmake

@@ -27,6 +27,8 @@ if (BUILD_OPENBLAS)
     if(WIN32 AND CMAKE_SIZEOF_VOID_P EQUAL 4)
         message(STATUS "32-bit target detected. Applying 32-bit configuration flags for OpenBLAS.")
 
+        set(OPENBLAS_WIN_32 ON)
+
         list(APPEND OPENBLAS_MINIMAL_FLAGS -DCMAKE_GENERATOR_PLATFORM=Win32)
 
         # Crucial for static linking: Force OpenBLAS to use the static runtime
@@ -37,9 +39,9 @@ if (BUILD_OPENBLAS)
         set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded")
 
         list(APPEND OPENBLAS_MINIMAL_FLAGS -DUSE_THREAD=OFF)
-
         list(APPEND OPENBLAS_MINIMAL_FLAGS -DINTERFACE64=0)
 
+
         # Note: If OpenBLAS has an internal logic flag to force 32-bit, you would add it here.
         # Example (hypothetical):
         # list(APPEND OPENBLAS_MINIMAL_FLAGS -DOPENBLAS_32BIT=ON)

highs/HConfig.h.in

@@ -13,6 +13,8 @@
 #cmakedefine HIGHS_HAVE_BUILTIN_CLZ
 #cmakedefine HIGHS_HAVE_BITSCAN_REVERSE
 #cmakedefine BLAS_LIBRARIES "@BLAS_LIBRARIES@"
+#cmakedefine OPENBLAS_WIN_32
+
 
 #define HIGHS_GITHASH "@GITHASH@"
 #define HIGHS_VERSION_MAJOR @HIGHS_VERSION_MAJOR@

highs/ipm/hipo/auxiliary/AutoDetect.cpp

@@ -31,6 +31,11 @@ IntegerModel getBlasIntegerModel() {
 
     const float X[3] = {1.0f, 2.0f, 3.0f};
 
+    // Check windows
+#ifndef OPENBLAS_WIN_32
+      blas_model = IntegerModel::lp32;
+#else
+
     const int64_t incx = 1;
     int64_t max_idx = cblas_isamax(n, X, incx);
 
@@ -49,6 +54,8 @@ IntegerModel getBlasIntegerModel() {
       // something went wrong
       blas_model = IntegerModel::unknown;
     }
+#endif
+
   }
 
   return blas_model;
@@ -62,6 +69,9 @@ std::string getIntegerModelString(IntegerModel i) {
     case IntegerModel::unknown:
       return "Unknown";
 
+    case IntegerModel::lp32:
+      return "LP32";
+
     case IntegerModel::lp64:
       return "LP64";
 

highs/ipm/hipo/auxiliary/AutoDetect.h

@@ -5,7 +5,7 @@
 
 namespace hipo {
 // Detect BLAS integer model
-enum class IntegerModel { not_set, unknown, lp64, ilp64 };
+enum class IntegerModel { not_set, unknown, lp32, lp64, ilp64 };
 IntegerModel getBlasIntegerModel();
 
 std::string getIntegerModelString(IntegerModel i);