Improve the state of handwritten assembly files (#865)

* Format all handwritten asm and document some

* Use c preprocessor for constants

* Fix

* Fix PI_STATUS_ERROR, some label improvements

* Avoid hi/lo for constants

* Some more comments

* Properly mark functions as functions and their sizes

* Fix merge

* Improvements

* Review suggestions, rework procedure start/end macros to be more like libreultra

* Move IPL3 symbol definitions into ipl3.s

* Fix undefined_syms, add include and language guards to asm.h and fix the comment in gbi.h

* Consistent hex capitalization, add some MIPS builtin defines to CC_CHECK to behave properly

* Add -no-pad-sections assembler option and clean up alignment in gu files and bzero

* Further suggestions and improvements

* Matrix conversion function clarifications

* Fix passing AVOID_UB to gcc

* Suggestions

* Suggestions, global interrupt mask improvements

* Further suggestions, interrupt mask comments

* Comments fixes, rdb.h

* Switch from # comments to // comments, remove unnecesary .set gp=64 directives

* Further review suggestions

* Missed one

spec

@@ -38,6 +38,7 @@ beginseg
     include "build/src/libultra/os/dequeuethread.o"
     include "build/src/libultra/os/destroythread.o"
     include "build/asm/bzero.o"
+    include "build/asm/parameters.o"
     include "build/src/libultra/os/createthread.o"
     include "build/asm/__osSetSR.o"
     include "build/asm/__osGetSR.o"
@@ -77,8 +78,7 @@ beginseg
     include "build/asm/__osSetCompare.o"
     include "build/asm/bcopy.o"
     include "build/src/libultra/os/resetglobalintmask.o"
-    include "build/asm/__osDisableInt.o"
-    include "build/asm/__osRestoreInt.o"
+    include "build/asm/interrupt.o"
     include "build/src/libultra/io/vimodentsclan1.o"
     include "build/src/libultra/io/vimodempallan1.o"
     include "build/src/libultra/io/vi.o"