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-; SPDX-License-Identifier: GPL-2.0
-;
-; mulsi3 for H8/300H - based on Renesas SH implementation
-;
-; by Toshiyasu Morita
-;
-; Old code:
-;
-; 16b * 16b = 372 states (worst case)
-; 32b * 32b = 724 states (worst case)
-;
-; New code:
-;
-; 16b * 16b = 48 states
-; 16b * 32b = 72 states
-; 32b * 32b = 92 states
-;
-
- .global __mulsi3
-__mulsi3:
- mov.w r1,r2 ; ( 2 states) b * d
- mulxu r0,er2 ; (22 states)
-
- mov.w e0,r3 ; ( 2 states) a * d
- beq L_skip1 ; ( 4 states)
- mulxu r1,er3 ; (22 states)
- add.w r3,e2 ; ( 2 states)
-
-L_skip1:
- mov.w e1,r3 ; ( 2 states) c * b
- beq L_skip2 ; ( 4 states)
- mulxu r0,er3 ; (22 states)
- add.w r3,e2 ; ( 2 states)
-
-L_skip2:
- mov.l er2,er0 ; ( 2 states)
- rts ; (10 states)
-
- .end