Renesas M32R-FPU Manual Do Utilizador
APPENDICES
APPENDICES-16
M32R-FPU Software Manual (Rev.1.01)
Appendix Figure 3.2.7 Pipeline Flow with Stalls (5)
<Case 12> The FPU and FMADD/FMSUB instructions run consecutively (with no register dependency)
IF
D
E1
E2
WB
IF
D
WB
E2
D
WB
E2
E1
stall
IF
D
E2
WB
EA
EM
EA
EM
stall
IF
<Case 13> The FPU and FMADD/FMSUB instructions run consecutively (with register dependency)
FADD R0,R1,R10
FADD R5,R6,R11
FMADD R2,R3,R4
FMADD R7,R8,R9
IF
D
E1
E2
WB
IF
D
WB
E2
D
WB
E2
E1
stall
D
stall
stall
stall
stall
stall
stall
stall
EA
EM
stall
stall
IF
FADD
R0
,R1,R10
FADD
R0
,
R0
,R11
FMADD
R0
,
R0
,R4
FMADD
R0
,R8,R9
IF
WB
E2
EA
EM
stall
stall
stall
APPENDIX 3
Appendix 3 Pipeline Processing