Add support machinery for ARM hosts.

[catacomb] / base / dispatch.c

diff --git a/base/dispatch.c b/base/dispatch.c
index 10ae404..1b0ab2b 100644 (file)
--- a/base/dispatch.c
+++ b/base/dispatch.c
@@ -224,6 +224,10 @@ struct auxentry { unsigned long type; union auxval value; };
  * that the necessary entry types are defined.  This is primarily ordered by
  * entry type to minimize duplication.
  */
+#if defined(AT_HWCAP) && CPUFAM_ARMEL
+#  define WANT_ANY 1
+#  define WANT_AT_HWCAP(_) _(AT_HWCAP, u, hwcap)
+#endif
 
 /* If we couldn't find any interesting entries then we can switch all of this
  * machinery off.  Also do that if we have no means for atomic updates.
@@ -255,6 +259,15 @@ static unsigned hwcaps = 0;
  *     intends to satisfy from the auxiliary vector.  Each entry contains a
  *     feature name suffix, and the token name (for `check_env').
  */
+#if CPUFAM_ARMEL
+#  define WANTAUX(_)                                                   \
+       WANT_AT_HWCAP(_)
+#  define CAPMAP(_)                                                    \
+       _(ARM_VFP, "arm:vfp")                                           \
+       _(ARM_NEON, "arm:neon")                                         \
+       _(ARM_V4, "arm:v4")                                             \
+       _(ARM_D32, "arm:d32")
+#endif
 
 /* Build the bitmask for `hwcaps' from the `CAPMAP' list. */
 enum {
@@ -358,6 +371,12 @@ static void probe_hwcaps(void)
   /* Each CPU family now has to pick through what was found and stashed in
    * `probed', and set the appropriate flag bits in `hw'.
    */
+#if CPUFAM_ARMEL
+  if (probed.hwcap & HWCAP_VFPv3) hw |= HF_ARM_VFP;
+  if (probed.hwcap & HWCAP_NEON) hw |= HF_ARM_NEON;
+  if (probed.hwcap & HWCAP_VFPD32) hw |= HF_ARM_D32;
+  if (probed.hwcap & HWCAP_VFPv4) hw |= HF_ARM_V4;
+#endif
 
   /* Store the bitmask of features we probed for everyone to see. */
   DISPATCH_STORE(hwcaps, hw);