diff options
Diffstat (limited to 'assembler')
| -rw-r--r-- | assembler/fvm-as.scm | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/assembler/fvm-as.scm b/assembler/fvm-as.scm index cf85024..bcc461a 100644 --- a/assembler/fvm-as.scm +++ b/assembler/fvm-as.scm @@ -1,4 +1,7 @@ (import srfi-69) +(import matchable) +(import (chicken io)) +(import (chicken condition)) (define (make-opcode-table) (define opcodes @@ -88,7 +91,7 @@ (cons (compose-tag curseg cur) ret) curseg) (impl (cdr prog) (cons cur ret) curseg))) - ((tag-op? cur) (if (local-tag? (cadr cur)) + ((is-tag-op? cur) (if (local-tag? (cadr cur)) (impl (cdr prog) (cons (list 'tag (compose-tag curseg (cadr cur))) ret) curseg) @@ -132,9 +135,34 @@ (impl prog '() 0)) (define (output-prog prog output-file) + (define (write-64bit-number port x) + (if (or (>= x (expt 2 63)) + (< x (- (expt 2 63)))) + (abort "number out of limit!")) + (if (< x 0) + (set! x (+ x (expt 2 64)))) + (let loop ((i 0) (x x)) + (if (>= i 8) + '() + (let () + (write-byte (modulo x 256) port) + (loop (+ i 1) (quotient x 256)))))) (call-with-output-file output-file (lambda (port) - '()))) + (let loop ((prog prog)) + (if (null? prog) + '() + (let ((cur (car prog))) + (match cur + (('imm x) + (let () + (write-byte (hash-table-ref opcode-table 'imm) port) + (write-64bit-number port x) + (loop (cdr prog)))) + (x + (let () + (write-byte (hash-table-ref opcode-table x) port) + (loop (cdr prog))))))))))) (define (main input-file output-file) (define prog '()) @@ -144,7 +172,9 @@ (set! prog (pseudo-op-pass prog)) (set! prog (tag-preprocess-pass prog)) (let ((new-prog (tag-pass prog))) - (if (and (not (null? new-prog)) - (eq? 'error (car prog))) + (if (or (null? new-prog) + (eq? 'error (car prog))) (display new-prog) ;; error (output-prog new-prog output-file)))) + +(main "input" "output") |