NS32FV16 Datasheet, PDF(95/104 Page) Texas Instruments – Advanced Imaging/Communication Signal Processors

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

NS32FV16 Datasheet, PDF (95/104 Pages) Texas Instruments – Advanced Imaging/Communication Signal Processors

◁

Appendix B Instruction Execution Times (Continued)

TEX Calculation

TEX Calculation

Operand 1 is in a register operand 2 is in memory This

means that we have to use the table values for the kFMl

case

The following parameter values are obtained from Table B-2

and the equations in the previous sections

TEA2 (Absolute Mode) e 4

TOPD (Memory Write) e 7 (Operand aligned no waits)

Operand 1 and operand 2 are both in memory Therefore

the table values for the kMMl case must be used

The parameter values obtained from Table B-2 and the

equations in the previous sections are as follows

TEA1 (Register Relative Mode) e 5

TEA2 (Memory Relative Mode) e 8 a TOPD e 15

(TOPD e 7 (Operand Aligned No Wait))

Tf e 4

TOPD1 (Read from GEN1) e 7 a 2 e 9 (Operand

TCY e 32

Aligned One Wait)

TPR e TEA2 a 6 e 4 a 6 e 10

From the FPU Execution Timing table in the NS32181 data

sheet we get a TFPU for MOVLF of 19 clock cycles

TOPD2 (RMW from GEN2) e 11 a 6 e 17 (Operand Una-

ligned Two Waits)

Tf e 4

The higher value between TPR and TFPU a 3 is 22 The

total execution time in clock cycles is

TEX e TEA2 a TOPD a TF a TCY a 22 e 65

EXAMPLE 2

Calculate TEX for the instruction MULF 20(R0) 4(10(FP))

Assumptions

The FPU being used is the NS32181

20(R0) is an aligned read with one wait state

te 10(FP) is an aligned read with no wait states

4(10 (FP)) is an unaligned rmw with two wait states

x TCY e 22

28

TPR e 0

From the FPU Execution Timing Table in the NS32181 data

sheet we get a TFPU for MULF of 33 clock cycles

The higher value between TPR and TFPU a 3 is 36 The

total execution time in clock cycles is

TEX e TEA1aTEA2aTOPD1aTOPD2a3TfaTCYa

x x 36e5a15a9a17a(22 28)a36e133 140

TABLE B-1 Basic Instructions

Mnemonic

TEA1

TEA2

TOPB

TOPW

TOPD

TOPi

L

TCY

Notes

le ABSi

1

1

1

1

2

9

SCR k 0

2

8

SCR l 0

ACBi

1

1

2

16

kMl no branch

2

15%20

kMl branch

18

kRl no branch

17%22

kRl branch

o ADDi

1

1

1

3

3

kxMl

1

4

kMRl

4

kRRl

ADDCi

1

1

1

3

3

kxMl

1

4

kMRl

4

kRRl

s ADDPi

1

1

1

1

3

16

No Carry

3

18

Carry

ADDQi

1

2

6

kMl

4

kRl

b ADDR

1

1

1

1

2

kxMl

3

kxRl

ADJSPi

1

1

6

O ANDi

1

1

1

3

3

kxMl

1

4

kMRl

4

kRRl

ASHi

1

1

1

2

14 x 45

Bcond

7

6%10

no branch

branch

BICi

1

1

1

3

3

kxMl

1

4

kMRl

4

kRRl

94

▷