ABI FPR names (#767)

* Add o32 to disassembler and update macro.inc

* Add a variable for asm processor to makefile
and improve objdump flags

* Update diff settings

* git subrepo pull --force tools/asm-differ

subrepo:
  subdir:   "tools/asm-differ"
  merged:   "1236288d1"
upstream:
  origin:   "https://github.com/simonlindholm/asm-differ"
  branch:   "main"
  commit:   "1236288d1"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

* Remove * import and implement option

* Fix some stuff in the makefile

* Update asm-processor

* Review

* Fix old var name

include/macro.inc

@@ -37,3 +37,39 @@
 .set TagHi,         $29
 .set ErrorEPC,      $30
 .set Reserved31,    $31
+
+
+# Float register aliases (o32 ABI, odd ones are rarely used)
+
+.set $fv0,          $f0
+.set $fv0f,         $f1
+.set $fv1,          $f2
+.set $fv1f,         $f3
+.set $ft0,          $f4
+.set $ft0f,         $f5
+.set $ft1,          $f6
+.set $ft1f,         $f7
+.set $ft2,          $f8
+.set $ft2f,         $f9
+.set $ft3,          $f10
+.set $ft3f,         $f11
+.set $fa0,          $f12
+.set $fa0f,         $f13
+.set $fa1,          $f14
+.set $fa1f,         $f15
+.set $ft4,          $f16
+.set $ft4f,         $f17
+.set $ft5,          $f18
+.set $ft5f,         $f19
+.set $fs0,          $f20
+.set $fs0f,         $f21
+.set $fs1,          $f22
+.set $fs1f,         $f23
+.set $fs2,          $f24
+.set $fs2f,         $f25
+.set $fs3,          $f26
+.set $fs3f,         $f27
+.set $fs4,          $f28
+.set $fs4f,         $f29
+.set $fs5,          $f30
+.set $fs5f,         $f31