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mescc: Support negative divide.

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* module/mescc/i386/as.scm (i386:r0/r1, i386:r0%r1): Support
negative divide.
* module/mescc/x86_64/as.scm (x86_64:r0/r1, x86_64:r0%r1): Likewise.
* lib/x86-mes/x86.M1: Likewise.
* lib/x86_64-mes/x86_64.M1: Likewise.
* scaffold/tests/a0-math-divide-signed-negative.c: Test it.
* build-aux/check-mescc.sh (tests): Run it.
This commit is contained in:
Jan Nieuwenhuizen 2018-10-06 17:28:08 +02:00
parent d862f1eceb
commit 3dd4da895f
No known key found for this signature in database
GPG key ID: F3C1A0D9C1D65273
7 changed files with 63 additions and 23 deletions
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2
build-aux/check-mescc.sh
View file

@ -222,6 +222,7 @@ t
a0-call-trunc-char
a0-call-trunc-short
a0-call-trunc-int
a0-math-divide-signed-negative
a1-global-no-align
a1-global-no-clobber
"
@ -231,6 +232,7 @@ broken="$broken
17-compare-unsigned-short-le
66-local-char-array
a0-call-trunc-int
a0-math-divide-signed-negative
"
# gcc not supported

1
lib/x86-mes/x86.M1
View file

@ -49,6 +49,7 @@ DEFINE and____%ebx,%eax 21d8
DEFINE call32 e8
DEFINE call___*%eax ffd0
DEFINE call___*%ebx ffd3
DEFINE cltd 99
DEFINE cmp____$0x32,%eax 3d
DEFINE cmp____$i32,%eax 3d
DEFINE cmp____$i8,%eax 83f8

1
lib/x86_64-mes/x86_64.M1
View file

@ -56,6 +56,7 @@ DEFINE cmp____$i32,%rax 483d
DEFINE cmp____$i8,%rax 4883f8
DEFINE cmp____%r15,%rax 4c39f8
DEFINE cmp____%r15,%rdi 4c39ff
DEFINE cqto 4899
DEFINE hlt f4
DEFINE idiv___%rdi 48f7ff
DEFINE ja32 0f87

30
module/mescc/compile.scm
View file

@ -79,10 +79,14 @@
(cons `(tag ,name) (make-type 'union size fields))))
(define (signed? o)
(eq? ((compose type:type ->type) o) 'signed))
(let ((type (->type o)))
(cond ((type? type) (eq? (type:type type) 'signed))
(else #f))))
(define (unsigned? o)
(eq? ((compose type:type ->type) o) 'unsigned))
(let ((type (->type o)))
(cond ((type? type) (eq? (type:type type) 'unsigned))
(else #t))))
(define (->size o info)
(cond ((and (type? o) (eq? (type:type o) 'union))
@ -792,7 +796,7 @@
(info (append-text info (wrap-as (append
(as info 'value->r size)
(as info 'swap-r0-r1)
(as info 'r0/r1)))))
(as info 'r0/r1 #f)))))
(info (append-text info (wrap-as (append (as info 'swap-r0-r1)))))
(free-register info))
info)))
@ -1177,7 +1181,7 @@
;; FIXME: c&p 792
(let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0/r1)))))
(as info 'r0/r1 #f)))))
(info (free-register info)))
info)))
(let* ((info (expr->register b info))
@ -1199,8 +1203,11 @@
((bitwise-xor ,a ,b) ((binop->r info) a b 'r0-xor-r1))
((lshift ,a ,b) ((binop->r info) a b 'r0<<r1))
((rshift ,a ,b) ((binop->r info) a b 'r0>>r1))
((div ,a ,b) ((binop->r info) a b 'r0/r1))
((mod ,a ,b) ((binop->r info) a b 'r0%r1))
((div ,a ,b)
((binop->r info) a b 'r0/r1
(or (signed? (ast->type a info)) (signed? (ast->type b info)))))
((mod ,a ,b) ((binop->r info) a b 'r0%r1
(or (signed? (ast->type a info)) (signed? (ast->type b info)))))
((mul ,a ,b) ((binop->r info) a b 'r0*r1))
((not ,expr)
@ -1334,11 +1341,12 @@
info)))
(info (expr->register a info))
(info (append-text info (wrap-as (as info 'swap-r0-r1))))
(signed? (or (signed? type) (signed? type-b)))
(info (append-text info (cond ((equal? op "+=") (wrap-as (as info 'r0+r1)))
((equal? op "-=") (wrap-as (as info 'r0-r1)))
((equal? op "*=") (wrap-as (as info 'r0*r1)))
((equal? op "/=") (wrap-as (as info 'r0/r1)))
((equal? op "%=") (wrap-as (as info 'r0%r1)))
((equal? op "/=") (wrap-as (as info 'r0/r1 signed?)))
((equal? op "%=") (wrap-as (as info 'r0%r1 signed?)))
((equal? op "&=") (wrap-as (as info 'r0-and-r1)))
((equal? op "|=") (wrap-as (as info 'r0-or-r1)))
((equal? op "^=") (wrap-as (as info 'r0-xor-r1)))
@ -1349,7 +1357,7 @@
(cond ((not (and (= rank 1) (= rank-b 1))) info)
((equal? op "-=") (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0/r1)))))
(as info 'r0/r1 signed?)))))
(info (free-register info)))
info))
(else (error (format #f "invalid operands to binary ~s (have ~s* and ~s*)" op type (ast->basic-type b info)))))))))
@ -1446,10 +1454,10 @@
(else '())))))
(define (binop->r info)
(lambda (a b c)
(lambda (a b c . rest)
(let* ((info (expr->register a info))
(info (expr->register b info))
(info (append-text info (wrap-as (as info c)))))
(info (append-text info (wrap-as (apply as info (cons c rest))))))
(free-register info))))
(define (binop->r* info)

12
module/mescc/i386/as.scm
View file

@ -354,7 +354,7 @@
(r1 (get-r1 info)))
`((,(string-append "and____%" r1 ",%" r0)))))
(define (i386:r0/r1 info)
(define (i386:r0/r1 info signed?)
(let ((allocated (.allocated info))
(r0 (get-r0 info))
(r1 (get-r1 info)))
@ -362,7 +362,7 @@
`(,@(if (equal? r0 "eax") '()
`(("push___%eax")
(,(string-append "mov____%" r0 ",%eax"))))
("xor____%edx,%edx")
,(if signed? '("cltd") '("xor____%edx,%edx"))
(,(string-append "idiv___%" r1))
,@(if (equal? r0 "eax") '()
`((,(string-append "mov____%eax,%" r0))
@ -372,14 +372,14 @@
("push___%edx")
(,(string-append "mov____%" r1 ",%ebx"))
(,(string-append "mov____%" r0 ",%eax"))
("xor____%edx,%edx")
,(if signed? '("cltd") '("xor____%edx,%edx"))
(,(string-append "idiv___%ebx"))
("pop____%edx")
("pop____%ebx")
(,(string-append "mov____%eax,%" r0))
("pop____%eax")))))
(define (i386:r0%r1 info)
(define (i386:r0%r1 info signed?)
(let ((allocated (.allocated info))
(r0 (get-r0 info))
(r1 (get-r1 info)))
@ -387,7 +387,7 @@
`(,@(if (equal? r0 "eax") '()
`(("push___%eax")
(,(string-append "mov____%" r0 ",%eax"))))
("xor____%edx,%edx")
,(if signed? '("cltd") '("xor____%edx,%edx"))
(,(string-append "idiv___%" r1))
(,(string-append "mov____%edx,%" r0)))
`(("push___%eax")
@ -395,7 +395,7 @@
("push___%edx")
(,(string-append "mov____%" r1 ",%ebx"))
(,(string-append "mov____%" r0 ",%eax"))
("xor____%edx,%edx")
,(if signed? '("cltd") '("xor____%edx,%edx"))
(,(string-append "idiv___%ebx"))
("pop____%edx")
("pop____%ebx")

12
module/mescc/x86_64/as.scm
View file

@ -436,7 +436,7 @@
(r1 (get-r1 info)))
`((,(string-append "and____%" r1 ",%" r0)))))
(define (x86_64:r0/r1 info)
(define (x86_64:r0/r1 info signed?)
(let ((allocated (.allocated info))
(r0 (get-r0 info))
(r1 (get-r1 info)))
@ -444,7 +444,7 @@
`(,@(if (equal? r0 "rax") '()
`(("push___%rax")
(,(string-append "mov____%" r0 ",%rax"))))
("xor____%rdx,%rdx")
,(if signed? '("cqto") '("xor____%rdx,%rdx"))
(,(string-append "idiv___%" r1))
,@(if (equal? r0 "rax") '()
`((,(string-append "mov____%rax,%" r0))
@ -454,14 +454,14 @@
("push___%rdx")
(,(string-append "mov____%" r1 ",%rdi"))
(,(string-append "mov____%" r0 ",%rax"))
("xor____%rdx,%rdx")
,(if signed? '("cqto") '("xor____%rdx,%rdx"))
(,(string-append "idiv___%rdi"))
("pop____%rdx")
("pop____%rdi")
(,(string-append "mov____%rax,%" r0))
("pop____%rax")))))
(define (x86_64:r0%r1 info)
(define (x86_64:r0%r1 info signed?)
(let ((allocated (.allocated info))
(r0 (get-r0 info))
(r1 (get-r1 info)))
@ -469,7 +469,7 @@
`(,@(if (equal? r0 "rax") '()
`(("push___%rax")
(,(string-append "mov____%" r0 ",%rax"))))
("xor____%rdx,%rdx")
,(if signed? '("cqto") '("xor____%rdx,%rdx"))
(,(string-append "idiv___%" r1))
(,(string-append "mov____%rdx,%" r0)))
`(("push___%rax")
@ -477,7 +477,7 @@
("push___%rdx")
(,(string-append "mov____%" r1 ",%rdi"))
(,(string-append "mov____%" r0 ",%rax"))
("xor____%rdx,%rdx")
,(if signed? '("cqto") '("xor____%rdx,%rdx"))
(,(string-append "idiv___%rdi"))
("pop____%rdx")
("pop____%rdi")

28
scaffold/tests/a0-math-divide-signed-negative.c Normal file
View file

@ -0,0 +1,28 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
int
main ()
{
int i = -2 / 1;
if (i != -2)
return 1;
return 0;
}