Infineon SP37 - Smulintint() (16 Bit * 16 Bit); Description; Actions; Prototype

SP37
Tire Pressure Monitoring Sensor
ROM Library Functions
ROM Library Function Guide 87 Revision 1.0, 2011-12-15
2.21 SMulIntInt() (16Bit * 16Bit)
2.21.1 Description
This function multiplies the first signed int value (16 bit) Multiplicand1 by the second signed int value (16bit)
Multiplicand2 and produces a 32-bit signed result.
2.21.2 Actions
• Perform multiplication
2.21.3 Prototype
void SMulIntInt(signed int idata * Multiplicand1, signed int idata * Multiplicand2, signed long idata * Product)
2.21.4 Inputs
2.21.5 Outputs
2.21.6 Resource Usage
Table 93 SMulIntInt: Input Parameters
Register / Address Type Name Description
R7 signed int
idata*
Multiplicand1 Pointer to Multiplicand1
R5 signed int
idata*
Multiplicand2 Pointer to Multiplicand2
R3 signed long
idata*
Product Pointer to an long array in RAM to the 32 Bit
multiplication Product
(Multiplicand1 * Multiplicand2)
Table 94 SMulIntInt: Output values
Register/ Address Type Name Description
None --- --- ---
Table 95 SMulIntInt: Resources
Type Used or Modified
Registers R0, R1, R2, R3, R4, R5, R6, R7
SFR ACC, B, PSW
Stack 2 Bytes
1)
1) Two additional bytes, not included here, are needed to call the library function