2  * fp-test-log2.c - test QEMU's softfloat log2
25 static void compare(ufloat64 test, ufloat64 real, ufloat64 soft, bool exact)  in compare()  argument
43     /* glibc allows 3 ulp error in its libm-test-ulps; allow 4 here */  in compare()
48     printf("test: %016" PRIx64 "  %+.13a\n"  in compare()
51            test.i, test.d, soft.i, soft.d, real.i, real.d);  in compare()
69     ufloat64 test, real, soft;  in main()  local
77     test.d = 0.0;  in main()
79     soft.i = float64_log2(test.i, &qsf);  in main()
80     compare(test, real, soft, true);  in main()
82     test.d = 1.0;  in main()
84     soft.i = float64_log2(test.i, &qsf);  in main()
85     compare(test, real, soft, true);  in main()
87     test.d = 2.0;  in main()
89     soft.i = float64_log2(test.i, &qsf);  in main()
90     compare(test, real, soft, true);  in main()
92     test.d = 4.0;  in main()
94     soft.i = float64_log2(test.i, &qsf);  in main()
95     compare(test, real, soft, true);  in main()
97     test.d = 0x1p64;  in main()
99     soft.i = float64_log2(test.i, &qsf);  in main()
100     compare(test, real, soft, true);  in main()
102     test.d = __builtin_inf();  in main()
104     soft.i = float64_log2(test.i, &qsf);  in main()
105     compare(test, real, soft, true);  in main()
108         test.d = drand48() + 1.0;    /* [1.0, 2.0) */  in main()
109         real.d = log2(test.d);  in main()
110         soft.i = float64_log2(test.i, &qsf);  in main()
111         compare(test, real, soft, false);  in main()
113         test.d = drand48() * 100;    /* [0.0, 100) */  in main()
114         real.d = log2(test.d);  in main()
115         soft.i = float64_log2(test.i, &qsf);  in main()
116         compare(test, real, soft, false);  in main()