1###################################-*-asm*-
2#
3#  Copyright (C) 2009-2020 Free Software Foundation, Inc.
4#
5#  Contributed by Michael Eager <eager@eagercon.com>.
6#
7#  This file is free software; you can redistribute it and/or modify it
8#  under the terms of the GNU General Public License as published by the
9#  Free Software Foundation; either version 3, or (at your option) any
10#  later version.
11#
12#  GCC is distributed in the hope that it will be useful, but WITHOUT
13#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14#  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
15#  License for more details.
16#
17#  Under Section 7 of GPL version 3, you are granted additional
18#  permissions described in the GCC Runtime Library Exception, version
19#  3.1, as published by the Free Software Foundation.
20#
21#  You should have received a copy of the GNU General Public License and
22#  a copy of the GCC Runtime Library Exception along with this program;
23#  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24#  <http://www.gnu.org/licenses/>.
25#
26#  mulsi3.S
27#
28#  Multiply operation for 32 bit integers.
29#	Input :	Operand1 in Reg r5
30#		Operand2 in Reg r6
31#	Output: Result [op1 * op2] in Reg r3
32#
33#######################################
34
35/* An executable stack is *not* required for these functions.  */
36#ifdef __linux__
37.section .note.GNU-stack,"",%progbits
38.previous
39#endif
40
41	.globl	__mulsi3
42	.ent	__mulsi3
43	.type	__mulsi3,@function
44__mulsi3:
45	.frame	r1,0,r15
46	add	r3,r0,r0
47	BEQI	r5,$L_Result_Is_Zero      # Multiply by Zero
48	BEQI	r6,$L_Result_Is_Zero      # Multiply by Zero
49	BGEId	r5,$L_R5_Pos
50	XOR	r4,r5,r6                  # Get the sign of the result
51	RSUBI	r5,r5,0	                  # Make r5 positive
52$L_R5_Pos:
53	BGEI	r6,$L_R6_Pos
54	RSUBI	r6,r6,0	                  # Make r6 positive
55$L_R6_Pos:
56	bri	$L1
57$L2:
58	add	r5,r5,r5
59$L1:
60	srl	r6,r6
61	addc	r7,r0,r0
62	beqi	r7,$L2
63	bneid	r6,$L2
64	add	r3,r3,r5
65	blti	r4,$L_NegateResult
66	rtsd	r15,8
67	nop
68$L_NegateResult:
69	rtsd	r15,8
70	rsub	r3,r3,r0
71$L_Result_Is_Zero:
72	rtsd	r15,8
73	addi	r3,r0,0
74	.end __mulsi3
75	.size	__mulsi3, . - __mulsi3
76