add initial ppc64el support

cmake/arch.cmake

@@ -9,6 +9,9 @@ elseif (HAVE_C_INTRIN_H)
 elseif (HAVE_C_ARM_NEON_H)
     set (INTRIN_INC_H "arm_neon.h")
     set (FAT_RUNTIME OFF)
+elseif (HAVE_C_PPC64EL_ALTIVEC_H)
+    set (INTRIN_INC_H "altivec.h")
+    set (FAT_RUNTIME OFF)
 else()
     message (FATAL_ERROR "No intrinsics header found")
 endif ()
@@ -96,6 +99,13 @@ int main() {
     int32x4_t a = vdupq_n_s32(1);
     (void)a;
 }" HAVE_NEON)
+elseif (ARCH_PPC64EL)
+    CHECK_C_SOURCE_COMPILES("#include <${INTRIN_INC_H}>
+int main() {
+    vector int a = vec_splat_s32(1);
+    (void)a;
+}" HAVE_VSX)
+
 else ()
     message (FATAL_ERROR "Unsupported architecture")
 endif ()
@@ -129,6 +139,10 @@ else (NOT FAT_RUNTIME)
     if ((ARCH_ARM32 OR ARCH_AARCH64) AND NOT HAVE_NEON)
         message(FATAL_ERROR "NEON support required for ARM support")
     endif ()
+    if (ARCH_PPPC64EL AND NOT HAVE_VSX)
+        message(FATAL_ERROR "VSX support required for Power support")
+    endif ()
+
 endif ()
 
 unset (CMAKE_REQUIRED_FLAGS)

cmake/config.h.in

@@ -21,6 +21,9 @@
 /* "Define if building for AARCH64" */
 #cmakedefine ARCH_AARCH64
 
+/* "Define if building for PPC64EL" */
+#cmakedefine ARCH_PPC64EL
+
 /* internal build, switch on dump support. */
 #cmakedefine DUMP_SUPPORT
 
@@ -60,6 +63,9 @@
 /* C compiler has arm_neon.h */
 #cmakedefine HAVE_C_ARM_NEON_H
 
+/* C compiler has arm_neon.h */
+#cmakedefine HAVE_C_PPC64EL_ALTIVEC_H
+
 /* Define to 1 if you have the declaration of `pthread_setaffinity_np', and to
    0 if you don't. */
 #cmakedefine HAVE_DECL_PTHREAD_SETAFFINITY_NP

cmake/platform.cmake

@@ -8,7 +8,8 @@ CHECK_C_SOURCE_COMPILES("#if !(defined(__i386__) || defined(_M_IX86))\n#error no
 CHECK_C_SOURCE_COMPILES("#if !defined(__ARM_ARCH_ISA_A64)\n#error not 64bit\n#endif\nint main(void) { return 0; }" ARCH_AARCH64)
 CHECK_C_SOURCE_COMPILES("#if !defined(__ARM_ARCH_ISA_ARM)\n#error not 32bit\n#endif\nint main(void) { return 0; }" ARCH_ARM32)
 
-if (ARCH_X86_64 OR ARCH_AARCH64)
+CHECK_C_SOURCE_COMPILES("#if !defined(__PPC64__) && !defined(__LITTLE_ENDIAN__) && !defined(__VSX__)\n#error not ppc64el\n#endif\nint main(void) { return 0; }" ARCH_PPC64EL)
+if (ARCH_X86_64 OR ARCH_AARCH64 OR ARCH_PPC64EL)
   set(ARCH_64_BIT TRUE)
 else()
   set(ARCH_32_BIT TRUE)