76 lines
2.1 KiB
ArmAsm
76 lines
2.1 KiB
ArmAsm
/*******************************************************************************
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HARPtools by Chad D. Kersey, Summer 2011
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********************************************************************************
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Sample HARP assmebly program.
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*******************************************************************************/
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/* sieve of eratosthanes: Find some primes. */
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.def SIZE 0x1000
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.align 4096
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.perm x
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.entry
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.global
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entry:
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ldi %r0, #2; /* i = 2 */
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loop1: addi %r7, %r0, #0;
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jali %r5, printdec;
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muli %r1, %r0, __WORD;
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st %r0, %r1, array;
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addi %r0, %r0, #1;
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subi %r1, %r0, SIZE;
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rtop @p0, %r1;
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@p0 ? jmpi loop1;
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ldi %r0, #1;
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loop2: addi %r0, %r0, #1;
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muli %r1, %r0, __WORD;
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ld %r1, %r1, array;
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rtop @p0, %r1;
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notp @p0, @p0;
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@p0 ? jmpi loop2;
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mul %r2, %r1, %r1;
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subi %r3, %r2, SIZE;
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neg %r3, %r3
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isneg @p0, %r3;
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@p0 ? jmpi end;
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ldi %r3, #0;
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loop3: muli %r4, %r2, __WORD;
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st %r3, %r4, array;
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add %r2, %r2, %r1;
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ldi %r4, SIZE;
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sub %r4, %r2, %r4;
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isneg @p0, %r4;
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notp @p0, @p0;
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@p0 ? jmpi loop2;
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jmpi loop3;
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end: ldi %r0, __WORD; /* i = 2 */
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shli %r0, %r0, #1;
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ldi %r11, #0;
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loop4: ld %r1, %r0, array;
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rtop @p0, %r1;
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@p0 ? addi %r7, %r1, #0;
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@p0 ? jali %r5, printdec;
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rtop @p0, %r1;
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@p0 ? addi %r11, %r11, #1;
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addi %r0, %r0, __WORD;
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ldi %r5, __WORD;
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muli %r5, %r5, SIZE;
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sub %r1, %r0, %r5;
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rtop @p0, %r1;
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@p0 ? jmpi loop4;
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addi %r7, %r11, #0;
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jali %r5, printdec;
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trap; /* All traps currently cause a halt. */
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.perm rw /* TODO: How should I write section permissions? */
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.global
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array: .space 0x1000 /* SIZE words of space. */
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