ST20-GP1 查看數據表（PDF） - STMicroelectronics

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ST20-GP1

GPS PROCESSOR

STMicroelectronics 

ST20-GP1

Memory

code

27F3

29FC

26F3

26FD

26FC

Mnemonic

cflerr

fptesterr

unpacksn

roundsn

postnormsn

Processor

cycles

2

1

4

7

7 to 8

Name

Notes

check floating point error

E

load value true (FPU not present)

unpack single length floating point number

A

round single length floating point number

A

post-normalize correction of single length float- A

ing point number

27F1

ldinf

load single length infinity

Table 6.16 Floating point support operation codes

Memory Mnemonic

code

Processor Name

cycles

2CF7 cir

2 to 4

check in range

2CFC ciru

2 to 4

check in range unsigned

2BFA cb

2 to 3

check byte

2BFB cbu

2FFA cs

2 to 3

2 to 3

check byte unsigned

check sixteen

2FFB csu

2 to 3

check sixteen unsigned

2FF8 xsword

2

sign extend sixteen to word

2BF8 xbword

3

sign extend byte to word

Table 6.17 Range checking and conversion instructions

Notes

A, E

A, E

A, E

A, E

A, E

A, E

A

A

Memory

code

2CF1

2CFA

2CF8

2BF9

2FF9

Mnemonic

ssub

ls

ss

lbx

lsx

Processor Name

cycles

1

sixteen subscript

1

load sixteen

2

store sixteen

1

load byte and sign extend

1

load sixteen and sign extend

Table 6.18 Indexing/array instructions

Notes

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