MOVPSL MOVE FROM PSL
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Purpose |
obtain processor status |
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Format |
opcode dst.wl |
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Operation |
dst ß PSL; |
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Condition codes |
N ß N; Z ß Z; V ß V; C ß C; |
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Exceptions |
none |
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Opcodes |
DC MOVPSL Move from PSL |
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Description |
The destination operand is replaced by the processor status longword |
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Notes |
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Example 1
In the following program we put 0 in r0, and then printing it, and printing the PSW.
Then we put -1 in r0 and print the PSW again. PSW will be 4 and then 8 (On the beginning the third bit will be 1, and on the end the fourth bit will be set).
.text
main: .word 0
# put 0 in r0. Zero flag will raised
movl $0, r0
movpsl r1 # r1 will contains the PSL
movw r1, r2 # save only the PSW to r2
pushl r0
pushl r2
pushal format
calls $3, .printf
# put negative number in r0. Neg flag should rised
movl $-1, r0
movpsl r1 # r1 will contains the PSL
movw r1, r2 # save only the PSW to r2
pushl r0
pushl r2
pushal format
calls $3, .printf
pushl $0
calls $1, .exit
format: .asciz "PSW is %d. R0 is %d\n"