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(define-module (backend emitter traverse)
#:export (prog
subrout
instr
allocate
mov
ret
neg
not
allocate
reg
stack
imm))
(define (prog srout)
(string-append/shared srout ".section .note.GNU-stack,\"\",@progbits\n"))
(define (srout label instrs)
(format #f " .globl ~a
~a:
\tpushq\t%rbp
\tmovq\t%rsp, %rbp
~a" label label (apply string-append/shared instrs)))
(define (mov src dst)
(format #f "\tmovl\t~a, ~a\n" src dst))
(define (ret)
"\tmovq\t%rbp, %rsp
\tpopq\t%rbp
\tret\n")
(define (neg dst)
(format #f "\tnegl\t~a\n" dst))
(define (not dst)
(format #f "\tnotl\t~a\n" dst))
(define (alloc size)
(format #f "\tsubq\t$~a, %rsp\n" size))
(define (reg r)
(format #f "%~a" r))
(define (stack loc)
(format #f "~a(%rbp)" loc))
(define (imm int)
(format #f "$~a" int))
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