From d315f61414ef06126ad019607e7c577b59a831fa Mon Sep 17 00:00:00 2001
From: Jens Steube <jens.steube@gmail.com>
Date: Sun, 24 Nov 2019 08:50:31 +0100
Subject: [PATCH] Fix -m 1800 speed on ROCM

---
 src/modules/module_01800.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/modules/module_01800.c b/src/modules/module_01800.c
index 9b6d0c196..4b1540dd7 100644
--- a/src/modules/module_01800.c
+++ b/src/modules/module_01800.c
@@ -434,7 +434,14 @@ char *module_jit_build_options (MAYBE_UNUSED const hashconfig_t *hashconfig, MAY
 {
   char *jit_build_options = NULL;
 
-  hc_asprintf (&jit_build_options, "-D NO_UNROLL");
+  if ((device_param->opencl_device_vendor_id == VENDOR_ID_AMD) && (device_param->has_vperm == true))
+  {
+    // unroll is faster on rocm in this kernel
+  }
+  else
+  {
+    hc_asprintf (&jit_build_options, "-D NO_UNROLL");
+  }
 
   return jit_build_options;
 }