d4b8572f11
This is a follow-up to 910a4bf5b.
1. __builtin_clz takes unsigned int, thus for uint16_t
src_rep_t_clz can't use it directly but should subtract 16
(leading 16 bits of the promoted argument are zero).
2. Fix (and simplify) clz_in_sig_frac.
Test plan: ninja check-compiler-rt
(extendhfsf2_test.c and extenddftf2_test.c)
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_extenddftf2
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#include "int_lib.h"
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#include <stdio.h>
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#if __LDBL_MANT_DIG__ == 113
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#include "fp_test.h"
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COMPILER_RT_ABI long double __extenddftf2(double a);
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int test__extenddftf2(double a, uint64_t expectedHi, uint64_t expectedLo)
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{
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long double x = __extenddftf2(a);
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int ret = compareResultF128(x, expectedHi, expectedLo);
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if (ret){
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printf("error in test__extenddftf2(%f) = %.20Lf, "
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"expected %.20Lf\n", a, x, fromRep128(expectedHi, expectedLo));
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}
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return ret;
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}
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char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
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#endif
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int main()
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{
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#if __LDBL_MANT_DIG__ == 113
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// qNaN
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if (test__extenddftf2(makeQNaN64(),
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UINT64_C(0x7fff800000000000),
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UINT64_C(0x0)))
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return 1;
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// NaN
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if (test__extenddftf2(makeNaN64(UINT64_C(0x7100000000000)),
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UINT64_C(0x7fff710000000000),
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UINT64_C(0x0)))
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return 1;
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// inf
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if (test__extenddftf2(makeInf64(),
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UINT64_C(0x7fff000000000000),
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UINT64_C(0x0)))
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return 1;
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// zero
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if (test__extenddftf2(0.0, UINT64_C(0x0), UINT64_C(0x0)))
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return 1;
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if (test__extenddftf2(0x1.23456789abcdefp+5,
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UINT64_C(0x400423456789abcd),
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UINT64_C(0xf000000000000000)))
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return 1;
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if (test__extenddftf2(0x1.edcba987654321fp-9,
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UINT64_C(0x3ff6edcba9876543),
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UINT64_C(0x2000000000000000)))
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return 1;
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if (test__extenddftf2(0x1.23456789abcdefp+45,
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UINT64_C(0x402c23456789abcd),
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UINT64_C(0xf000000000000000)))
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return 1;
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if (test__extenddftf2(0x1.edcba987654321fp-45,
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UINT64_C(0x3fd2edcba9876543),
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UINT64_C(0x2000000000000000)))
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return 1;
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// denormal
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if (test__extenddftf2(1.8194069811494184E-308,
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UINT64_C(0x3c00a2a7757954b9),
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UINT64_C(0x6000000000000000)))
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return 1;
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#else
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printf("skipped\n");
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#endif
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return 0;
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}
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