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s_compareNonnormExtF80M.c File Reference
Include dependency graph for s_compareNonnormExtF80M.c:
Go to the source code of this file.
Functions | |
| int | softfloat_compareNonnormExtF80M (const struct extFloat80M *aSPtr, const struct extFloat80M *bSPtr) |
Function Documentation
◆ softfloat_compareNonnormExtF80M()
| int softfloat_compareNonnormExtF80M | ( | const struct extFloat80M * | aSPtr, |
| const struct extFloat80M * | bSPtr ) |
Definition at line 43 of file s_compareNonnormExtF80M.c.
45{
46 uint_fast16_t uiA64, uiB64;
47 uint64_t sigA;
48 bool signB;
49 uint64_t sigB;
50 int32_t expA, expB;
51
52 /*------------------------------------------------------------------------
53 *------------------------------------------------------------------------*/
54 uiA64 = aSPtr->signExp;
55 uiB64 = bSPtr->signExp;
56 sigA = aSPtr->signif;
57 signB = signExtF80UI64( uiB64 );
58 sigB = bSPtr->signif;
59 /*------------------------------------------------------------------------
60 *------------------------------------------------------------------------*/
61 if ( (uiA64 ^ uiB64) & 0x8000 ) {
62 if ( ! (sigA | sigB) ) return 0;
63 goto resultFromSignB;
64 }
65 /*------------------------------------------------------------------------
66 *------------------------------------------------------------------------*/
67 expA = expExtF80UI64( uiA64 );
68 expB = expExtF80UI64( uiB64 );
69 if ( expA == 0x7FFF ) {
70 if (expB == 0x7FFF) return 0;
71 signB = ! signB;
72 goto resultFromSignB;
73 }
74 if ( expB == 0x7FFF ) {
75 goto resultFromSignB;
76 }
77 /*------------------------------------------------------------------------
78 *------------------------------------------------------------------------*/
79 if ( ! expA ) expA = 1;
81 if ( sigA ) {
82 expA += softfloat_normExtF80SigM( &sigA );
83 } else {
84 expA = -128;
85 }
86 }
87 if ( ! expB ) expB = 1;
89 if ( sigB ) {
90 expB += softfloat_normExtF80SigM( &sigB );
91 } else {
92 expB = -128;
93 }
94 }
95 /*------------------------------------------------------------------------
96 *------------------------------------------------------------------------*/
97 if ( signB ) {
98 if ( expA < expB ) return 1;
99 if ( (expB < expA) || (sigB < sigA) ) return -1;
100 } else {
101 if ( expB < expA ) return 1;
102 if ( (expA < expB) || (sigA < sigB) ) return -1;
103 }
104 return (sigA != sigB);
105 /*------------------------------------------------------------------------
106 *------------------------------------------------------------------------*/
107 resultFromSignB:
108 return signB ? 1 : -1;
109
110}
