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Annotation of coherent/b/lib/libc/crt/i8086/dtest.s, revision 1.1.1.1

1.1       root        1: ////////
                      2: /
                      3: / Intel 8086 floating point.
                      4: / Test accumulator.
                      5: / SMALL model.
                      6: /
                      7: ////////
                      8: 
                      9:        .globl  ddtest
                     10:        .globl  _fpac_
                     11: 
                     12: ////////
                     13: /
                     14: / ** ddtest -- push double accumulator.
                     15: /
                     16: / This utility routine is called by the compiler to test
                     17: / the double accumulator (a quad word called _fpac_).
                     18: / This "test" instruction used to be generated directly
                     19: / in the leaves.t code table, but in LARGE model _fpac_
                     20: / is not directly addressible and a "call ddtest()" is
                     21: / required instead.
                     22: /
                     23: / compiler calling sequence:
                     24: /      call    ddtest
                     25: /
                     26: / outputs:
                     27: /      flags to indicate whether _fpac_ is zero
                     28: /
                     29: ////////
                     30: 
                     31: EXPON  =       0x7F80                  / DECVAX format exponent bits
                     32: 
                     33: ddtest:        test    _fpac_+6,$EXPON         / test high word
                     34:        ret                             / and return

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