92 lines
3.1 KiB
Scheme
92 lines
3.1 KiB
Scheme
;;; GNU Mes --- Maxwell Equations of Software
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;;; Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of GNU Mes.
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;;;
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;;; GNU Mes is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Mes is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Define x86_64 M1 assembly
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;;; Code:
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(define-module (mescc x86_64 as)
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#:use-module (mes guile)
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#:use-module (mescc as)
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#:use-module (mescc info)
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#:export (
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x86_64:instructions
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))
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(define (x86_64:function-preamble . rest)
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'(("push___%rbp")
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("mov____%rsp,%rbp")
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;;("mov____%rdi,0x8(%rbp)" "!-0x08")
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;;("mov____%rsi,0x8(%rbp)" "!-0x10")
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;;("mov____%rdx,0x8(%rbp)" "!-0x18")
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;;("mov____%rcx,0x8(%rbp)" "!-0x20")
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))
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(define (x86_64:function-locals . rest)
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`(
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;; FIXME: how on x86_64?
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("sub____$i32,%rsp" (#:immediate ,(+ (* 4 1025) (* 20 8))))
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)) ; 4*1024 buf, 20 local vars
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(define (x86_64:r0->local info n)
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(or n (error "invalid value: x86_64:r0->local: " n))
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(let ((r0 (car (if (pair? (.allocated info)) (.allocated info) (.registers info))))
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(n (- 0 (* 8 n))))
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`(,(if (< (abs n) #x80) `(,(string-append "mov____%" r0 ",0x8(%rbp)") (#:immediate1 ,n))
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`(,(string-append "mov____%" r0 ",0x32(%rbp)") (#:immediate ,n))))))
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(define (x86_64:value->r0 info v)
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(or v (error "invalid value: x86_64:value->r0: " v))
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(let ((r0 (car (if (pair? (.allocated info)) (.allocated info) (.registers info)))))
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`((,(string-append "mov____$i32,%" r0) (#:immediate ,v)))))
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(define (x86_64:ret . rest)
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'(("mov____%rbp,%rsp")
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("pop____%rbp")
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("ret")))
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(define (x86_64:r0-zero? info)
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(let ((r0 (car (if (pair? (.allocated info)) (.allocated info) (.registers info)))))
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`((,(string-append "test___%" r0 "," "%" r0)))))
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(define (x86_64:local->r0 info n)
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(or n (error "invalid value: x86_64:local->r0: " n))
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(let ((r0 (car (if (pair? (.allocated info)) (.allocated info) (.registers info))))
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(n (- 0 (* 8 n))))
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`(,(if (< (abs n) #x80) `(,(string-append "mov____0x8(%rbp),%" r0) (#:immediate1 ,n))
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`(,(string-append "mov____0x32(%rbp),%" r0) (#:immediate ,n))))))
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(define (x86_64:call-label info label n)
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`((call32 (#:offset ,label))
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;;("add____$i8,%esp" (#:immediate1 ,(* n 4)))
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))
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(define x86_64:instructions
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`(
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(call-label . ,x86_64:call-label)
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(function-preamble . ,x86_64:function-preamble)
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(function-locals . ,x86_64:function-locals)
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(local->r0 . ,x86_64:local->r0)
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(r0->local . ,x86_64:r0->local)
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(r0-zero? . ,x86_64:r0-zero?)
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(ret . ,x86_64:ret)
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(value->r0 . ,x86_64:value->r0)
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))
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