Add the __ARM_ARCH_EXT_IDIV__ predefine. It is set to 1 if we have hardware divide in the mode that we are compiling in (depending on the target features), not defined if we don't. Should be compatible with the GCC conterpart. Also adding a -hwdiv option to overide the default behavior.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193074 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 3c98cb3..4592308 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -596,6 +596,27 @@
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
+// Handle -mhwdiv=.
+static void getARMHWDivFeatures(const Driver &D, const Arg *A,
+ const ArgList &Args,
+ std::vector<const char *> &Features) {
+ StringRef HWDiv = A->getValue();
+ if (HWDiv == "arm") {
+ Features.push_back("+hwdiv-arm");
+ Features.push_back("-hwdiv");
+ } else if (HWDiv == "thumb") {
+ Features.push_back("-hwdiv-arm");
+ Features.push_back("+hwdiv");
+ } else if (HWDiv == "arm,thumb" || HWDiv == "thumb,arm") {
+ Features.push_back("+hwdiv-arm");
+ Features.push_back("+hwdiv");
+ } else if (HWDiv == "none") {
+ Features.push_back("-hwdiv-arm");
+ Features.push_back("-hwdiv");
+ } else
+ D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
+}
+
// Handle -mfpu=.
//
// FIXME: Centralize feature selection, defaulting shouldn't be also in the
@@ -740,6 +761,8 @@
// Honor -mfpu=.
if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
getARMFPUFeatures(D, A, Args, Features);
+ if (const Arg *A = Args.getLastArg(options::OPT_mhwdiv_EQ))
+ getARMHWDivFeatures(D, A, Args, Features);
// Setting -msoft-float effectively disables NEON because of the GCC
// implementation, although the same isn't true of VFP or VFP3.