X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fgp2x%2Fcode940%2F940init.s;h=904ccba5148dd95f1c2e66e58b6fc97ea2957e43;hb=51a902ae2512cffdb3ac7751988c1bde4a641be4;hp=dcf4368a9c4816961c9bc2baa53caa83d09cfb09;hpb=cb0316e4c526ad4c8d50e40e53c9d39044dcaaf9;p=picodrive.git

diff --git a/platform/gp2x/code940/940init.s b/platform/gp2x/code940/940init.s
index dcf4368..904ccba 100644
--- a/platform/gp2x/code940/940init.s
+++ b/platform/gp2x/code940/940init.s
@@ -182,4 +182,14 @@ wait_irq:
 
 .pool
 
+
+.global set_if_not_changed @ int *val, int oldval, int newval
+
+set_if_not_changed:
+    swp    r3, r2, [r0]
+    cmp    r1, r3
+    bxeq   lr
+    strne  r3, [r0] @ restore value which was changed there by other core
+    bx     lr
+
 @ vim:filetype=armasm: