updated Cyclone not to use r9

[picodrive.git] / cpu / Cyclone / Cyclone.txt

diff --git a/cpu/Cyclone/Cyclone.txt b/cpu/Cyclone/Cyclone.txt
index a452f15..9af86ae 100644 (file)
--- a/cpu/Cyclone/Cyclone.txt
+++ b/cpu/Cyclone/Cyclone.txt
@@ -456,11 +456,12 @@ See source code for up to date of register usage, however a summary is here:
   r6  : Pointer to Opcode Jump table\r
   r7  : Pointer to Cpu Context\r
   r8  : Current Opcode\r
-  r9  : Flags (NZCV) in highest four bits\r
- (r10 : Temporary source value or Memory Base)\r
+  r10 : Flags (NZCV) in highest four bits\r
  (r11 : Temporary register)\r
 \r
 Flags are mapped onto ARM flags whenever possible, which speeds up the processing of opcode.\r
+r9 is not used intentionally, because AAPCS defines it as "platform register", so it's\r
+reserved in some systems.\r
 \r
 \r
 Thanks to...\r
@@ -476,6 +477,10 @@ Thanks to...
 \r
 What's New\r
 ----------\r
+v0.0099 notaz\r
+  * Cyclone no longer uses r9, because AAPCS defines it as "platform register",\r
+    so it's reserved in some systems.\r
+\r
 v0.0088 notaz\r
   - Reduced amount of code in opcode handlers by ~23% by doing the following:\r
     - Removed duplicate opcode handlers\r