Subversion Repositories openrisc_me

# r0, r4-r6 are used as tmps, consider them call clobbered by these macros.

        .macro start
        .data
failmsg:
        .ascii "fail\n"
passmsg:
        .ascii "pass\n"
        .text
        .global _start
_start:
        ldi32 0x7fffc,sp        ; TODO -- what's a good value for this?
        ldi32 0xffc00,r0
        mov   r0,tbr            ; defined in manual
        mov   sp,usp
        mov   sp,ssp
        .endm

; Exit with return code
        .macro exit rc
        ldi32 \rc,r4
        ldi32 #1,r0
        int   #10
        .endm

; Pass the test case
        .macro pass
        ldi32 #5,r6
        ldi32 #passmsg,r5
        ldi32 #1,r4
        ldi32 #5,r0
        int   #10
        exit  #0
        .endm

; Fail the testcase
        .macro fail
        ldi32 #5,r6
        ldi32 #failmsg,r5
        ldi32 #1,r4
        ldi32 #5,r0
        int   #10
        exit  #1
        .endm

; Load an immediate value into a general register
; TODO: use minimal sized insn
        .macro mvi_h_gr val reg
        ldi32 \val,\reg
        .endm

; Load an immediate value into a dedicated register
        .macro mvi_h_dr val reg
        ldi32 \val,r0
        mov r0,\reg
        .endm

; Load a general register into another general register
        .macro mvr_h_gr src targ
        mov \src,\targ
        .endm

; Store an immediate into a word in memory
        .macro mvi_h_mem val addr
        mvi_h_gr  \val r4
        mvr_h_mem r4,\addr
        .endm

; Store a register into a word in memory
        .macro mvr_h_mem reg addr
        st \reg,@\addr
        .endm

; Store the current ps on the stack
        .macro save_ps
        st ps,@-r15
        .endm

; Load a word value from memory
        .macro ldmem_h_gr addr reg
        ld @\addr,\reg
        .endm

; Add 2 general registers
        .macro add_h_gr reg1 reg2
        add \reg1,\reg2
        .endm

; Increment a register by and immediate
        .macro inci_h_gr inc reg
        mvi_h_gr \inc,r4
        add r4,\reg
        .endm

; Test the value of an immediate against a general register
        .macro test_h_gr val reg
        .if (\val >= 0) && (\val <= 15)
        cmp \val,\reg
        .else
        .if (\val < 0) && (\val >= -16)
        cmp2 \val,\reg
        .else
        ldi32 \val,r4
        cmp r4,\reg
        .endif
        .endif
        beq test_gr\@
        fail
test_gr\@:
        .endm

; compare two general registers
        .macro testr_h_gr reg1 reg2
        cmp \reg1,\reg2
        beq testr_gr\@
        fail
testr_gr\@:
        .endm

; Test the value of an immediate against a dedicated register
        .macro test_h_dr val reg
        mov \reg,r5
        test_h_gr \val r5
        .endm

; Test the value of an general register against a dedicated register
        .macro testr_h_dr gr dr
        mov \dr,r5
        testr_h_gr \gr r5
        .endm

; Compare an immediate with word in memory
        .macro test_h_mem val addr
        ldmem_h_gr \addr r5
        test_h_gr \val r5
        .endm

; Compare a general register with word in memory
        .macro testr_h_mem reg addr
        ldmem_h_gr \addr r5
        testr_h_gr \reg r5
        .endm

; Set the condition codes
        .macro set_cc mask
        andccr  0xf0
        orccr   \mask
        .endm

; Set the stack mode
        .macro set_s_user
        orccr   0x20
        .endm

        .macro set_s_system
        andccr  0x1f
        .endm

; Test the stack mode
        .macro test_s_user
        mvr_h_gr ps,r0
        mvi_h_gr 0x20,r4
        and      r4,r0
        test_h_gr 0x20,r0
        .endm

        .macro test_s_system
        mvr_h_gr ps,r0
        mvi_h_gr 0x20,r4
        and      r4,r0
        test_h_gr 0x0,r0
        .endm

; Set the interrupt bit
        .macro set_i val
        .if (\val == 1)
        orccr   0x10
        .else
        andccr  0x2f
        .endif
        .endm

; Test the stack mode
        .macro test_i val
        mvr_h_gr  ps,r0
        mvi_h_gr  0x10,r4
        and       r4,r0
        .if (\val == 1)
        test_h_gr 0x10,r0
        .else
        test_h_gr 0x0,r0
        .endif
        .endm

; Set the ilm
        .macro set_ilm val
        stilm \val
        .endm

; Test the ilm
        .macro test_ilm val
        mvr_h_gr   ps,r0
        mvi_h_gr   0x1f0000,r4
        and        r4,r0
        mvi_h_gr   \val,r5
        mvi_h_gr   0x1f,r4
        and        r4,r5
        lsl        15,r5
        lsl        1,r5
        testr_h_gr r0,r5
        .endm

; Test the condition codes
        .macro test_cc N Z V C
        .if (\N == 1)
        bp fail\@
        .else
        bn fail\@
        .endif
        .if (\Z == 1)
        bne fail\@
        .else
        beq fail\@
        .endif
        .if (\V == 1)
        bnv fail\@
        .else
        bv fail\@
        .endif
        .if (\C == 1)
        bnc fail\@
        .else
        bc fail\@
        .endif
        bra test_cc\@
fail\@:
        fail
test_cc\@:
        .endm

; Set the division bits
        .macro set_dbits val
        mvr_h_gr ps,r5
        mvi_h_gr 0xfffff8ff,r4
        and r4,r5
        mvi_h_gr \val,r0
        mvi_h_gr 3,r4
        and r4,r0
        lsl 9,r0
        or r0,r5
        mvr_h_gr r5,ps
        .endm

; Test the division bits
        .macro test_dbits val
        mvr_h_gr ps,r0
        lsr 9,r0
        mvi_h_gr 3,r4
        and r4,r0
        test_h_gr \val,r0
        .endm

; Save the return pointer
        .macro save_rp
        st rp,@-R15
        .ENDM

; restore the return pointer
        .macro restore_rp
        ld @R15+,rp
        .endm

; Ensure branch taken
        .macro take_branch opcode
        \opcode take_br\@
        fail
take_br\@:
        .endm

        .macro take_branch_d opcode val
        \opcode take_brd\@
        ldi:8 \val,r0
        fail
take_brd\@:
        test_h_gr \val,r0
        .endm

; Ensure branch not taken
        .macro no_branch opcode
        \opcode no_brf\@
        bra     no_brs\@
no_brf\@:
        fail
no_brs\@:
        .endm

        .macro no_branch_d opcode val
        \opcode no_brdf\@
        ldi:8   \val,r0
        bra     no_brds\@
no_brdf\@:
        fail
no_brds\@:
        test_h_gr \val,r0
        .endm