From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4ef8328033f37e9bcc5980b3eebb9636@rei2.9hal>
Date: Mon, 29 Apr 2013 21:06:01 +0200
From: cinap_lenrek@gmx.de
To: 9fans@9fans.net
In-Reply-To: <55d863d12c769379ce2cbf372d2f5160@coraid.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Subject: Re: [9fans] 5l bug
Topicbox-Message-UUID: 4b468792-ead8-11e9-9d60-3106f5b1d025

term% cat foo.c
#include <u.h>
#include <libc.h>

void
main(void)
{
	int i, j, k;

	i = 1;
	j = 0;
	k = j <= 0 ? 1 : 2/i;
	print("%d\n", k);
	exits(nil);
}

term% 5c -S foo.c
	TEXT	main+0(SB),0,$20
	MOVW	$1,R1
	MOVW	$0,R2
	CMP	$0,R2,
	MOVW.LE	R1,R3
	BLE	,3(PC)
	MOVW	$2,R3
	DIV	R1,R3,R3
	MOVW	$.string<>+0(SB),R0
	MOVW	R3,8(R13)
	BL	,print+0(SB)
	MOVW	$0,R0
	BL	,exits+0(SB)
	RET	,
	DATA	.string<>+0(SB)/8,$"%d\n\z\z\z\z\z"
	GLOBL	.string<>+0(SB),$8
	END	,

5.out:arm plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/arm
acid: asm(main)
main 0x00001020	MOVW.W	R14,#-0x18(R13)
main+0x4 0x00001024	MOVW	$#0x1,R1
main+0x8 0x00001028	MOVW	$#0x0,R2
main+0xc 0x0000102c	CMP.S	$#0x0,R2
main+0x10 0x00001030	MOVW.LE	R1,R3
main+0x14 0x00001034	B.LE	main+0x34
main+0x18 0x00001038	MOVW	$#0x2,R3
main+0x1c 0x0000103c	SUB	$#0x8,R13,R13
main+0x20 0x00001040	MOVW	R1,#0x4(R13)
main+0x24 0x00001044	MOVW	R3,R11
main+0x28 0x00001048	BL	_div
main+0x2c 0x0000104c	MOVW	R11,R3
main+0x30 0x00001050	ADD	$#0x8,R13,R13
main+0x34 0x00001054	MOVW	$#0x7084,R0
main+0x38 0x00001058	MOVW	R3,#0x8(R13)
main+0x3c 0x0000105c	BL	print
main+0x40 0x00001060	MOVW	$#0x0,R0
main+0x44 0x00001064	BL	exits
main+0x48 0x00001068	RET.P	#0x18(R13)
_main 0x0000106c	MOVW.W	R14,#-0x54(R13)
acid:

--
cinap