[ARM] add target arch definitions for 8.1-M and MVE
This adds:
- LLVM subtarget features to make all the new instructions conditional on,
- CPU and FPU names for use on clang's command line, with default FPUs set
so that "armv8.1-m.main+fp" and "armv8.1-m.main+fp.dp" will select the right
FPU features,
- architecture extension names "mve" and "mve.fp",
- ABI build attribute support for v8.1-M (a new value for Tag_CPU_arch) and MVE
(a new actual tag).
Patch mostly by Simon Tatham.
Differential Revision: https://reviews.llvm.org/D60698
llvm-svn: 362090
diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
index 1c3469b..c7b7157 100644
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -230,6 +230,24 @@
}
}
+ if (Attributes.hasAttribute(ARMBuildAttrs::MVE_arch)) {
+ switch(Attributes.getAttributeValue(ARMBuildAttrs::MVE_arch)) {
+ default:
+ break;
+ case ARMBuildAttrs::Not_Allowed:
+ Features.AddFeature("mve", false);
+ Features.AddFeature("mve.fp", false);
+ break;
+ case ARMBuildAttrs::AllowMVEInteger:
+ Features.AddFeature("mve.fp", false);
+ Features.AddFeature("mve");
+ break;
+ case ARMBuildAttrs::AllowMVEIntegerAndFloat:
+ Features.AddFeature("mve.fp");
+ break;
+ }
+ }
+
if (Attributes.hasAttribute(ARMBuildAttrs::DIV_use)) {
switch(Attributes.getAttributeValue(ARMBuildAttrs::DIV_use)) {
default: