derek.holloway
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111 lines
3.3 KiB
ArmAsm
111 lines
3.3 KiB
ArmAsm
# mach: bpf
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# output: pass\nexit 0 (0x0)\n
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/* alu32.s
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Tests for ALU(32) BPF instructions in simulator */
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.include "testutils.inc"
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.text
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.global main
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.type main, @function
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main:
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mov32 %r1, 10 /* r1 = 10 */
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mov32 %r2, -5 /* r2 = -5 */
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/* add */
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add32 %r1, 1 /* r1 += 1 (r1 = 11) */
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add32 %r2, -1 /* r2 += -1 (r2 = -6) */
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add32 %r1, %r2 /* r1 += r2 (r1 = 11 + -6 = 5) */
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fail_ne32 %r1, 5
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/* sub */
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sub32 %r1, 5 /* r1 -= 5 (r1 = 0) */
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sub32 %r1, -5 /* r1 -= -5 (r1 = 5) */
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sub32 %r1, %r2 /* r1 -= r2 (r1 = 5 - -6 = 11) */
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fail_ne32 %r1, 11
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/* mul */
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mul32 %r1, 2 /* r1 *= 2 (r1 = 22) */
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mul32 %r1, -2 /* r1 *= -2 (r1 = -44) */
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mul32 %r1, %r2 /* r1 *= r2 (r1 = -44 * -6 = 264) */
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fail_ne32 %r1, 264
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/* div */
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div32 %r1, 6
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mov32 %r2, 11
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div32 %r1, %r2
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fail_ne32 %r1, 4
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/* div is unsigned */
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mov32 %r1, -8 /* 0xfffffff8 */
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div32 %r1, 2
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fail_ne32 %r1, 0x7ffffffc /* sign bits are not preserved */
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/* and (bitwise) */
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mov32 %r1, 0xb /* r1 = (0xb = 0b1011) */
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mov32 %r2, 0x5 /* r2 = (0x5 = 0b0101) */
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and32 %r1, 0xa /* r1 &= (0xa = 0b1010) = (0b1010 = 0xa) */
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fail_ne32 %r1, 0xa
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and32 %r1, %r2 /* r1 &= r2 = 0x0 */
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fail_ne32 %r1, 0x0
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/* or (bitwise) */
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or32 %r1, 0xb
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or32 %r1, %r2
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fail_ne32 %r1, 0xf
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/* lsh (left shift) */
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lsh32 %r1, 4 /* r1 <<= 4 (r1 = 0xf0) */
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mov32 %r2, 24 /* r2 = 24 */
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lsh32 %r1, %r2
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fail_ne32 %r1, -268435456 /* 0xf0000000 */
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/* rsh (right logical shift) */
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rsh32 %r1, 2
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rsh32 %r1, %r2
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fail_ne32 %r1, 0x3c /* (0xf000 0000 >> 26) */
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/* arsh (right arithmetic shift) */
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arsh32 %r1, 1
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or32 %r1, -2147483648 /* 0x80000000 */
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mov32 %r2, 3
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arsh32 %r1, %r2
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fail_ne %r1, 0x00000000F0000003
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/* Note: make sure r1 is NOT sign-extended */
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/* i.e. upper-32 bits should be untouched. */
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/* mod */
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mov32 %r1, 1025
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mod32 %r1, 16
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fail_ne32 %r1, 1
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/* mod is unsigned */
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mov32 %r1, 1025
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mod32 %r1, -16 /* when unsigned, much larger than 1025 */
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fail_ne32 %r1, 1025
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mov32 %r1, -25 /* when unsigned, a large positive which is */
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mov32 %r2, 5 /* ... not evenly divisible by 5 */
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mod32 %r1, %r2
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fail_ne32 %r1, 1
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/* xor */
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xor32 %r1, %r2
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fail_ne32 %r1, 4
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xor32 %r1, -268435441 /* 0xF000000F */
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fail_ne %r1, 0xF000000B /* Note: check for (bad) sign-extend */
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xor32 %r1, %r1
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fail_ne %r1, 0
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/* neg */
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mov32 %r1, -1
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mov32 %r2, 0x7fffffff
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neg32 %r1
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neg32 %r2
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fail_ne32 %r1, 1
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fail_ne %r2, 0x80000001 /* Note: check for (bad) sign-extend */
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neg32 %r2
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fail_ne32 %r2, 0x7fffffff
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pass
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