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96 lines
4.5 KiB
ArmAsm
96 lines
4.5 KiB
ArmAsm
ttl fast floating point cmp/tst (ffpcmp/ffptst)
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***************************************
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* (c) copyright 1981 by motorola inc. *
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***************************************
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*************************************************************
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* ffpcmp *
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* fast floating point compare *
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* *
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* input: d6 - fast floating point argument (source) *
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* d7 - fast floating point argument (destination) *
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* *
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* output: condition code reflecting the following branches *
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* for the result of comparing the destination *
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* minus the source: *
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* *
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* gt - destination greater *
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* ge - destination greater or equal to *
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* eq - destination equal *
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* ne - destination not equal *
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* lt - destination less than *
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* le - destination less than or equal to *
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* *
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* condition codes: *
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* n - cleared *
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* z - set if result is zero *
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* v - cleared *
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* c - undefined *
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* x - undefined *
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* *
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* all registers transparent *
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* *
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*************************************************************
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page
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ffpcmp idnt 1,1 ffp cmp/tst
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xdef ffpcmp fast floating point compare
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xref ffpcpyrt copyright notice
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section 9
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***********************
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* compare entry point *
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***********************
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ffpcmp cmp.b d6,d7 compare sign and exponent only first
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bne.s ffpcrtn return if that is sufficient
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cmp.l d6,d7 no, compare full longwords then
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ffpcrtn rts and return to the caller
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page
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*************************************************************
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* ffptst *
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* fast floating point test *
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* *
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* input: d7 - fast floating point argument *
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* *
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* output: condition codes set for the following branches: *
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* *
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* eq - argument equals zero *
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* ne - argument not equal zero *
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* pl - argument is positive (includes zero)*
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* mi - argument is negative *
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* *
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* condition codes: *
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* n - set if result is negative *
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* z - set if result is zero *
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* v - cleared *
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* c - undefined *
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* x - undefined *
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* *
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* all registers transparent *
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* *
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*************************************************************
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page
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xdef ffptst fast floating point test
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********************
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* test entry point *
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********************
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ffptst tst.b d7 return tested condition code
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rts to caller
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end
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sted condition code
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rts to caller
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end
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sted condition code
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rts to caller
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end
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sted condition code
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rts to caller
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end
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