added compat flags for easier cross-compilation

1 files changed, 5 insertions, 1 deletions

diff --git a/pu2/pu2.c b/pu2/pu2.c
index 1e3bdf1..076261c 100644
--- a/pu2/pu2.c
+++ b/pu2/pu2.c
@@ -286,7 +286,7 @@ int   *Data;
 
 init_ir2() {
     Code = &m[ 4000 ];
-    Data = &m[ S * sizeof(int) - 1 ]; // grows downwards
+    Data = &m[ S - 1 ]; // grows downwards
 }
 
 __attribute__((always_inline)) emit(int op, int val) {
@@ -638,9 +638,13 @@ string op_names[] = { "hlt", "imm", "lod", "str", "swp", "add", "sub", "and", "n
                       "a2u", "u2a", "b2u", "u2b", "nop", "cb1", "cb2", "cb3", "cb4" };
 
 unsigned long long rdtsc(void) {
+#ifndef PU2_NO_ASM
     unsigned hi, lo;
     __asm__ __volatile__("rdtsc" : "=a"(lo), "=d"(hi));
     return ((unsigned long long) hi << 32) | lo;
+#else
+    return 0;
+#endif
 }
 
 clock_t ntime() {