Fcalva/cyclone
1
0
Fork 0
mirror of https://github.com/justinethier/cyclone.git synced 2025-07-15 16:57:35 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Issue #189 - Reimplementation of bitwise-if

Browse source
This commit is contained in:
Justin Ethier 2017-08-29 18:41:18 -04:00
parent 8749981f23
commit 8f4e0ccf75
1 changed files with 13 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
srfi/60.scm
View file

@ -139,15 +139,19 @@
(define bitwise-not lognot)
(define-c bitwise-if
"(void* data, int argc, closure _, object k,
object mask, object n0, object n1)"
"Cyc_check_fixnum(data, mask); // TODO: bignum support
Cyc_check_fixnum(data, n0);
Cyc_check_fixnum(data, n1);
int m = unbox_number(mask);
int result = (m & ((int)unbox_number(n0))) | ((~m) & ((int)unbox_number(n1)));
return_closcall1(data, k, obj_int2obj(result));")
;;(define-c bitwise-if
;; "(void* data, int argc, closure _, object k,
;; object mask, object n0, object n1)"
;; "Cyc_check_fixnum(data, mask); // TODO: bignum support
;; Cyc_check_fixnum(data, n0);
;; Cyc_check_fixnum(data, n1);
;; int m = unbox_number(mask);
;; int result = (m & ((int)unbox_number(n0))) | ((~m) & ((int)unbox_number(n1)));
;; return_closcall1(data, k, obj_int2obj(result));")
(define (bitwise-if mask n0 n1)
(logior (logand mask n0)
(logand (lognot mask) n1)))
(define bitwise-merge bitwise-if)