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path: root/vm/mterp/armv7-a/OP_DIV_INT.S
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%default {}
%verify "executed"
    /*
     * Specialized 32-bit binary operation
     *
     * Performs "r0 = r0 div r1". The selection between sdiv or the gcc helper
     * depends on the compile time value of __ARM_ARCH_EXT_IDIV__ (defined for
     * ARMv7 CPUs that have hardware division support).
     *
     * div-int
     *
     */
    FETCH(r0, 1)                        @ r0<- CCBB
    mov     r9, rINST, lsr #8           @ r9<- AA
    mov     r3, r0, lsr #8              @ r3<- CC
    and     r2, r0, #255                @ r2<- BB
    GET_VREG(r1, r3)                    @ r1<- vCC
    GET_VREG(r0, r2)                    @ r0<- vBB
    cmp     r1, #0                      @ is second operand zero?
    beq     common_errDivideByZero

    FETCH_ADVANCE_INST(2)               @ advance rPC, load rINST
#ifdef __ARM_ARCH_EXT_IDIV__
    sdiv    r0, r0, r1                  @ r0<- op
#else
    bl    __aeabi_idiv                  @ r0<- op, r0-r3 changed
#endif
    GET_INST_OPCODE(ip)                 @ extract opcode from rINST
    SET_VREG(r0, r9)                    @ vAA<- r0
    GOTO_OPCODE(ip)                     @ jump to next instruction
    /* 11-14 instructions */