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Rev | Author | Line No. | Line |
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2 | pj | 1 | .globl _wordpointer |
2 | .type _wordpointer,@object |
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3 | .size _wordpointer,4 |
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4 | |||
5 | .globl _bitindex |
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6 | .type _bitindex,@object |
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7 | .size _bitindex,4 |
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8 | |||
9 | .globl _getbits |
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10 | .type _getbits,@function |
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11 | _getbits: |
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12 | cmpl $0,4(%esp) |
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13 | jne .L1 |
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14 | xorl %eax,%eax |
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15 | ret |
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16 | |||
17 | .L1: |
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18 | movl _wordpointer,%ecx |
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19 | movzbl (%ecx),%eax |
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20 | shll $16,%eax |
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21 | movb 1(%ecx),%ah |
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22 | movb 2(%ecx),%al |
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23 | movl _bitindex,%ecx |
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24 | shll $8,%eax |
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25 | shll %cl,%eax |
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26 | movl 4(%esp),%ecx |
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27 | addl %ecx,_bitindex |
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28 | negl %ecx |
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29 | addl $32,%ecx |
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30 | shrl %cl,%eax |
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31 | movl _bitindex,%ecx |
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32 | sarl $3,%ecx |
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33 | addl %ecx,_wordpointer |
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34 | andl $7,_bitindex |
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35 | ret |
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36 | |||
37 | |||
38 | |||
39 | .globl _getbits_fast |
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40 | .type _getbits_fast,@function |
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41 | _getbits_fast: |
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42 | movl _wordpointer,%ecx |
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43 | movzbl 1(%ecx),%eax |
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44 | movb (%ecx),%ah |
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45 | movl _bitindex,%ecx |
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46 | shlw %cl,%ax |
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47 | movl 4(%esp),%ecx |
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48 | addl %ecx,_bitindex |
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49 | negl %ecx |
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50 | addl $16,%ecx |
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51 | shrl %cl,%eax |
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52 | movl _bitindex,%ecx |
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53 | sarl $3,%ecx |
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54 | addl %ecx,_wordpointer |
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55 | andl $7,_bitindex |
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56 | ret |
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57 | |||
58 | |||
59 | |||
60 | .globl _get1bit |
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61 | .type _get1bit,@function |
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62 | _get1bit: |
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63 | movl _wordpointer,%ecx |
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64 | movzbl (%ecx),%eax |
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65 | movl _bitindex,%ecx |
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66 | incl %ecx |
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67 | rolb %cl,%al |
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68 | andb $1,%al |
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69 | movl %ecx,_bitindex |
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70 | andl $7,_bitindex |
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71 | sarl $3,%ecx |
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72 | addl %ecx,_wordpointer |
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73 | ret |