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76 lines
1.3 KiB
76 lines
1.3 KiB
/*[
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bound.c
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LOCAL CHAR SccsID[]="@(#)bound.c 1.6 03/28/94";
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BOUND CPU functions.
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--------------------
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]*/
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#include <insignia.h>
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#include <host_def.h>
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#include <xt.h>
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#include <c_main.h>
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#include <c_addr.h>
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#include <c_bsic.h>
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#include <c_prot.h>
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#include <c_seg.h>
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#include <c_stack.h>
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#include <c_xcptn.h>
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#include <c_reg.h>
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#include <bound.h>
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/*
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=====================================================================
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EXTERNAL ROUTINES STARTS HERE.
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=====================================================================
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*/
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GLOBAL VOID
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BOUND
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#ifdef ANSI
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(
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IU32 op1, /* lsrc(test value) operand */
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IU32 op2[2], /* rsrc(lower:upper pair) operand */
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IUM8 op_sz /* 16 or 32-bit */
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)
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#else
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(op1, op2, op_sz)
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IU32 op1;
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IU32 op2[2];
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IUM8 op_sz;
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#endif
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{
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IS32 value;
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IS32 lower;
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IS32 upper;
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/* transfer to local signed variables */
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value = op1;
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lower = op2[0];
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upper = op2[1];
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if ( op_sz == 16 )
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{
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/* sign extend operands */
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if ( value & BIT15_MASK )
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value |= ~WORD_MASK;
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if ( lower & BIT15_MASK )
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lower |= ~WORD_MASK;
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if ( upper & BIT15_MASK )
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upper |= ~WORD_MASK;
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}
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op_sz = op_sz / 8; /* determine number of bytes in operand */
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if ( value < lower || value > upper )
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Int5();
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}
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