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test flags when doing mov

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folkert van heusden 2022-03-14 19:48:18 +01:00
parent 1b527c8c38
commit d140590a06
2 changed files with 69 additions and 0 deletions
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66
tester-mov.mac Normal file
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@ -0,0 +1,66 @@
.EXTERN ALL
test_mov:
MOV #what_mov,R0
CALL print_start
; test if flags are set when moving value
; clear N, Z, set V and C
MOV #3,R0
MTPS R0
MOV #0,R0
; get flag-register
MFPS R1
; mask off upper 4 bits of byte
BIC #65520.,R1
; only Z and CARRY must be set
CMP #5.,R1
BEQ test_mov_t1_ok
; test 1 failed
MOV #1.,R0
JMP test_mov_fail
test_mov_t1_ok:
test_mov_t2:
; clear all flags
MOV #0,R0
MTPS R0
MOV #32768.,R0
; get flag-register
MFPS R1
; mask off upper 4 bits of byte
BIC #240.,R1
; only N must be set
CMPB #8.,R1
BEQ test_mov_t2_ok
; test 2 failed
MOV #2.,R0
JMP test_mov_fail
test_mov_t2_ok:
RET
test_mov_fail:
; print test number
CALL print_binary
; flags are always in R1
MOV R1,R0
CALL print_binary
MOV #test_mov_fail_txt,R0
CALL print_start
RET
test_mov_fail_txt:
.ASCII "MOV handling FAIL\r\n\x00"
what_mov:
.ASCII "MOV flag test\r\n\x00"
.EVEN

3
tester.mac
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@ -13,6 +13,7 @@ start: MOV #1000, R6
.INCLUDE "tester-psw.mac"
.INCLUDE "tester-adc-sbc.mac"
.INCLUDE "tester-addressing.mac"
.INCLUDE "tester-mov.mac"
go: MOV #textstart, R0
CALL print_start
@ -27,6 +28,8 @@ go: MOV #textstart, R0
CALL test_addr
CALL test_mov
MOV #textfin, R0
CALL print_start
TRAP 7