118 lines
1.8 KiB
PHP
118 lines
1.8 KiB
PHP
# r0-r3 are used as tmps, consider them call clobbered by these macros.
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# This uses the angel rom monitor calls.
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# ??? How do we use the \@ facility of .macros ???
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# @ is the comment char!
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.macro mvi_h_gr reg, val
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ldr \reg,[pc]
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b . + 8
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.word \val
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.endm
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.macro mvaddr_h_gr reg, addr
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ldr \reg,[pc]
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b . + 8
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.word \addr
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.endm
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.macro start
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.data
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failmsg:
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.asciz "fail\n"
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passmsg:
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.asciz "pass\n"
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.text
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do_pass:
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ldr r1, passmsg_addr
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mov r0, #4
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swi #0x123456
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exit 0
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passmsg_addr:
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.word passmsg
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do_fail:
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ldr r1, failmsg_addr
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mov r0, #4
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swi #0x123456
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exit 1
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failmsg_addr:
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.word failmsg
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.global _start
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_start:
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.endm
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# *** Other macros know pass/fail are 4 bytes in size! Yuck.
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.macro pass
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b do_pass
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.endm
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.macro fail
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b do_fail
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.endm
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.macro exit rc
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# ??? This works with the ARMulator but maybe not others.
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#mov r0, #\rc
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#swi #1
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# This seems to be portable (though it ignores rc).
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mov r0,#0x18
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mvi_h_gr r1, 0x20026
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swi #0x123456
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# If that returns, punt with a sigill.
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stc 0,cr0,[r0]
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.endm
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# Other macros know this only clobbers r0.
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# WARNING: It also clobbers the condition codes (FIXME).
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.macro test_h_gr reg, val
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mvaddr_h_gr r0, \val
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cmp \reg, r0
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beq . + 8
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fail
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.endm
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.macro mvi_h_cnvz c, n, v, z
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mov r0, #0
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.if \c
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orr r0, r0, #0x20000000
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.endif
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.if \n
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orr r0, r0, #0x80000000
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.endif
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.if \v
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orr r0, r0, #0x10000000
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.endif
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.if \z
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orr r0, r0, #0x40000000
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.endif
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mrs r1, cpsr
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bic r1, r1, #0xf0000000
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orr r1, r1, r0
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msr cpsr, r1
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# ??? nops needed
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.endm
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# ??? Preserve condition codes?
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.macro test_h_cnvz c, n, v, z
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mov r0, #0
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.if \c
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orr r0, r0, #0x20000000
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.endif
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.if \n
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orr r0, r0, #0x80000000
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.endif
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.if \v
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orr r0, r0, #0x10000000
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.endif
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.if \z
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orr r0, r0, #0x40000000
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.endif
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mrs r1, cpsr
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and r1, r1, #0xf0000000
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cmp r0, r1
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beq . + 8
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fail
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.endm
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