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| author | Rangi <remy.oukaour+rangi@gmail.com> | 2018-05-28 11:25:55 -0400 |
|---|---|---|
| committer | Rangi <remy.oukaour+rangi@gmail.com> | 2018-05-28 11:25:55 -0400 |
| commit | 5e4a6aea518e73798ea13c4e4a90f3afd9b24cce (patch) | |
| tree | 3ea0ab7ce4eba106c36a389137ae375a4f49e84b | |
| parent | 21abc06448e3929c7f40063cffe7f1ee8be3ad5a (diff) | |
Use the maskbits macro from pokecrystal PR 514
| -rw-r--r-- | macros/code.asm | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/macros/code.asm b/macros/code.asm index 1fb651f..09b1525 100644 --- a/macros/code.asm +++ b/macros/code.asm @@ -36,8 +36,10 @@ jumptable: MACRO ENDM maskbits: MACRO -; masks just enough bits to cover the argument +; masks just enough bits to cover the first argument +; the second argument is an optional shift amount ; e.g. "maskbits 26" becomes "and %00011111" (since 26 - 1 = %00011001) +; and "maskbits 3, 2" becomes "and %00001100" (since "maskbits 3" becomes %00000011) ; example usage in rejection sampling: ; .loop ; call Random @@ -50,7 +52,11 @@ if x + 1 < (\1) x = x << 1 | 1 endc endr +if _NARG == 2 + and x << (\2) +else and x +endc ENDM calc_sine_wave: MACRO |