bts-to-test-or.patch

diff --git a/src/sregex/sre_vm_thompson_x64.dasc b/src/sregex/sre_vm_thompson_x64.dasc
index c7f59e4..0d3b8bd 100644
--- a/src/sregex/sre_vm_thompson_x64.dasc
+++ b/src/sregex/sre_vm_thompson_x64.dasc
@@ -39,6 +39,7 @@
 
 /* recording threads added */
 |.define ADDED, rcx
+|.define ADDEDd, ecx
 
 |.type CTX, sre_vm_thompson_ctx_t,          rdi  // 1st arg
 |.type TL,  sre_vm_thompson_thread_list_t,  r15  // callee-save
@@ -92,8 +93,16 @@
 ||  bofs = tid;
 ||}
 |
+||if (bofs < 32) {
+|   test ADDEDd, (1 << bofs)
+|   jnz >2
+|   or ADDEDd, (1 << bofs)
+|
+||} else {
+|
 |  bts ADDED, (bofs)  // load CF with the bit and set the bit
 |  jb >2  // jump if CF = 1
+||}
 |
 ||if (jit->threads_added_in_memory) {
 |    mov CTX->threads_added[(tid / 64)], ADDED