67 lines
987 B
ArmAsm
67 lines
987 B
ArmAsm
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! Entry: r4: destination
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! r5: source
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! Exit: r0: result
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! r1-r2,r4-r5: clobbered
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#include "asm.h"
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ENTRY(strcmp)
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mov r4,r0
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or r5,r0
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tst #3,r0
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bf L_setup_char_loop
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mov #0,r0
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#ifdef DELAYED_BRANCHES
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mov.l @r4+,r1
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.align 2
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Longword_loop:
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mov.l @r5+,r2
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cmp/str r0,r1
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bt Longword_loop_end
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cmp/eq r1,r2
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bt.s Longword_loop
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mov.l @r4+,r1
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add #-4, r4
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Longword_loop_end:
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add #-4, r4
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add #-4, r5
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L_setup_char_loop:
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mov.b @r4+,r0
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.align 2
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L_char_loop:
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mov.b @r5+,r1
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tst r0,r0
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bt L_return
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cmp/eq r0,r1
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bt.s L_char_loop
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mov.b @r4+,r0
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add #-2,r4
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mov.b @r4,r0
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#else /* ! DELAYED_BRANCHES */
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.align 2
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Longword_loop:
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mov.l @r4+,r1
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mov.l @r5+,r2
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cmp/str r0,r1
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bt Longword_loop_end
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cmp/eq r1,r2
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bt Longword_loop
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Longword_loop_end:
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add #-4, r4
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add #-4, r5
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.align 2
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L_setup_char_loop:
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L_char_loop:
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mov.b @r4+,r0
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mov.b @r5+,r1
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tst r0,r0
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bt L_return
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cmp/eq r0,r1
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bt L_char_loop
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#endif
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L_return:
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extu.b r0,r0
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extu.b r1,r1
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rts
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sub r1,r0
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