Texas Instruments TMS34010 - Page 124

Appendix E
ISP(96),STK,1
SP.A7,FP
2
• globl _function3
jFunctions that have parameters must clean
up their own stack. This is done by
placing the old system stack pointer
back into into STK. The 96 comes from
64 bits (A7 and FP) and 32 bits for
the return PC.
jRestore all registers that were used
jPOP off the return PC and the two words
of the old system stack pointer •
111"11'11"11111111'111."'.'.1.'.' •••••• ".".".,"
, FUNCTION DEF : _function3
'.11"""'.'1,.""."""."""" •• "",.",1."",
function3:
MMTM
SP.A7.FP
;Save all register~ to be used
MOYE
STK,FP
jCreate new local frame
ADDI
48,STK
jOne 32 bit variable and one char, chars
are stored in 16 bits for efficiency
MOVa
'FP(-32),A7 jExtract parmi (8 bit char)
MOVE A7,'FP,1
HOVE
'FP(-192).IFP(O),1
ilocal variable =
struct_parm.struct_elementl
HOVa
'FP(-48) ,A7
jlocal variable =
HOVE
A1,'fP,\ struct __ parm. struct_e I ement3[ 10)
HOVE
IFP(-224),A7,\
; local variable2 =
HOVa A7,'fP(321
parm2
EPIO 4:
HOVE
'SP(96) ,STK, I
HMfM
SP.A7.fP
RETS
2
• end
E-5