I noticed that rdma is turned off when using -mcpu=native on ThunderX2
CN99xx which is incorrect. The main reason it does that is because
rdma is incorrectly recorded as rdma rather than simdrdma as the
feature string in aarch64-option-extensions.def.
This patch fixes and fixes the problem I was seeing as in some
binutils +nordma disables simd also. Committed as obvious after a
bootstrap/test on aarch64-linux-gnu with no regressions.
Here is my /proc/cpuinfo:
processor : 29
BogoMIPS : 400.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics
CPU implementer : 0x42
CPU architecture: 8
CPU variant : 0x0
CPU part : 0x516
CPU revision : 1
* aarch64-option-extensions.def (rdma): Fix feature string to what
Linux prints out in /proc/cpuinfo.
--- aarch64-option-extensions.def (revision 251068)
+++ aarch64-option-extensions.def (working copy)
@@ -65,6 +65,6 @@ AARCH64_OPT_EXTENSION("rcpc", AARCH64_FL
/* Enabling "rdma" also enables "fp", "simd".
Disabling "rdma" just disables "rdma". */
-AARCH64_OPT_EXTENSION("rdma", AARCH64_FL_RDMA, AARCH64_FL_FP |
AARCH64_FL_SIMD, 0, "rdma")
+AARCH64_OPT_EXTENSION("rdma", AARCH64_FL_RDMA, AARCH64_FL_FP |
AARCH64_FL_SIMD, 0, "asimdrdm")