[builtins] Add option to always build int128 routines

32-bit targets don't build these by default, but e.g. armv7 and x86 can
build them just fine, and it's useful to have the int128 routines
available for certain applications. Add a CMake option to let us include
the int128 routines for architectures which would otherwise lack them.

Reviewed By: compnerd, MaskRay, phosek

Differential Revision: https://reviews.llvm.org/D145003

diff --git a/compiler-rt/lib/builtins/CMakeLists.txt b/compiler-rt/lib/builtins/CMakeLists.txt
index 5e2274d..891a92f 100644 (file)
--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -735,6 +735,10 @@ set(ve_SOURCES
 add_custom_target(builtins)
 set_target_properties(builtins PROPERTIES FOLDER "Compiler-RT Misc")
 
+option(COMPILER_RT_ENABLE_SOFTWARE_INT128
+  "Enable the int128 builtin routines for all targets."
+  OFF)
+
 if (APPLE)
   add_subdirectory(Darwin-excludes)
   add_subdirectory(macho_embedded)
@@ -811,7 +815,7 @@ else ()
 
       # For RISCV32, we must force enable int128 for compiling long
       # double routines.
-      if("${arch}" STREQUAL "riscv32")
+      if(COMPILER_RT_ENABLE_SOFTWARE_INT128 OR "${arch}" STREQUAL "riscv32")
         list(APPEND BUILTIN_CFLAGS_${arch} -fforce-enable-int128)
       endif()
 

diff --git a/compiler-rt/test/builtins/CMakeLists.txt b/compiler-rt/test/builtins/CMakeLists.txt
index ceacbd8..57117f6 100644 (file)
--- a/compiler-rt/test/builtins/CMakeLists.txt
+++ b/compiler-rt/test/builtins/CMakeLists.txt
@@ -39,7 +39,7 @@ foreach(arch ${BUILTIN_TEST_ARCH})
     string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
   endif()
 
-  if (${arch} STREQUAL "riscv32")
+  if (COMPILER_RT_ENABLE_SOFTWARE_INT128 OR ${arch} STREQUAL "riscv32")
     list(APPEND BUILTINS_TEST_TARGET_CFLAGS -fforce-enable-int128)
     string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
   endif()