Subversion Repositories openrisc

# r0-r3 are used as tmps, consider them call clobbered by these macros.

# This uses the angel rom monitor calls.

# ??? How do we use the \@ facility of .macros ???

# @ is the comment char!

        .macro mvi_h_gr reg, val

        ldr \reg,[pc]

        b . + 8

        .word \val

        .endm

        .macro mvaddr_h_gr reg, addr

        ldr \reg,[pc]

        b . + 8

        .word \addr

        .endm

        .macro start

        .data

failmsg:

        .asciz "fail\n"

passmsg:

        .asciz "pass\n"

        .text

do_pass:

        ldr r1, passmsg_addr

        mov r0, #4

        swi #0x123456

        exit 0

passmsg_addr:

        .word passmsg

do_fail:

        ldr r1, failmsg_addr

        mov r0, #4

        swi #0x123456

        exit 1

failmsg_addr:

        .word failmsg

        .global _start

_start:

        .endm

# *** Other macros know pass/fail are 4 bytes in size!  Yuck.

        .macro pass

        b do_pass

        .endm

        .macro fail

        b do_fail

        .endm

        .macro exit rc

        # ??? This works with the ARMulator but maybe not others.

        #mov r0, #\rc

        #swi #1

        # This seems to be portable (though it ignores rc).

        mov r0,#0x18

        mvi_h_gr r1, 0x20026

        swi #0x123456

        # If that returns, punt with a sigill.

        stc 0,cr0,[r0]

        .endm

# Other macros know this only clobbers r0.

# WARNING: It also clobbers the condition codes (FIXME).

        .macro test_h_gr reg, val

        mvaddr_h_gr r0, \val

        cmp \reg, r0

        beq . + 8

        fail

        .endm

        .macro mvi_h_cnvz c, n, v, z

        mov r0, #0

        .if \c

        orr r0, r0, #0x20000000

        .endif

        .if \n

        orr r0, r0, #0x80000000

        .endif

        .if \v

        orr r0, r0, #0x10000000

        .endif

        .if \z

        orr r0, r0, #0x40000000

        .endif

        mrs r1, cpsr

        bic r1, r1, #0xf0000000

        orr r1, r1, r0

        msr cpsr, r1

        # ??? nops needed

        .endm

# ??? Preserve condition codes?

        .macro test_h_cnvz c, n, v, z

        mov r0, #0

        .if \c

        orr r0, r0, #0x20000000

        .endif

        .if \n

        orr r0, r0, #0x80000000

        .endif

        .if \v

        orr r0, r0, #0x10000000

        .endif

        .if \z

        orr r0, r0, #0x40000000

        .endif

        mrs r1, cpsr

        and r1, r1, #0xf0000000

        cmp r0, r1

        beq . + 8

        fail

        .endm