This revision was automatically updated to reflect the committed changes. Closed by commit rL291259: [builtins] Implement __floattitf() & __floatuntitf() (authored by mgorny).
Changed prior to commit: https://reviews.llvm.org/D27898?vs=82414&id=83385#toc Repository: rL LLVM https://reviews.llvm.org/D27898 Files: compiler-rt/trunk/lib/builtins/CMakeLists.txt compiler-rt/trunk/lib/builtins/floattitf.c compiler-rt/trunk/lib/builtins/floatuntitf.c compiler-rt/trunk/test/builtins/Unit/floattitf_test.c compiler-rt/trunk/test/builtins/Unit/floatuntitf_test.c
Index: compiler-rt/trunk/test/builtins/Unit/floatuntitf_test.c =================================================================== --- compiler-rt/trunk/test/builtins/Unit/floatuntitf_test.c +++ compiler-rt/trunk/test/builtins/Unit/floatuntitf_test.c @@ -0,0 +1,220 @@ +//===-- floatuntitf.c - Test __floatuntitf --------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __floatuntitf for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" +#include "int_lib.h" +#include <float.h> +#include <stdio.h> + +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) + +/* Returns: convert a tu_int to a fp_t, rounding toward even. */ + +/* Assumption: fp_t is a IEEE 128 bit floating point type + * tu_int is a 128 bit integral type + */ + +/* seee eeee eeee eeee mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | + * mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ + +COMPILER_RT_ABI fp_t __floatuntitf(tu_int a); + +int test__floatuntitf(tu_int a, fp_t expected) { + fp_t x = __floatuntitf(a); + if (x != expected) { + utwords at; + at.all = a; + printf("error in __floatuntitf(0x%.16llX%.16llX) = %LA, expected %LA\n", + at.s.high, at.s.low, x, expected); + } + return x != expected; +} + +char assumption_1[sizeof(tu_int) == 2*sizeof(du_int)] = {0}; +char assumption_2[sizeof(tu_int)*CHAR_BIT == 128] = {0}; +char assumption_3[sizeof(fp_t)*CHAR_BIT == 128] = {0}; + +#endif + +int main() { +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) + if (test__floatuntitf(0, 0.0)) + return 1; + + if (test__floatuntitf(1, 1.0)) + return 1; + if (test__floatuntitf(2, 2.0)) + return 1; + if (test__floatuntitf(20, 20.0)) + return 1; + + if (test__floatuntitf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62)) + return 1; + if (test__floatuntitf(0x7FFFFFFFFFFFF800ULL, 0x1.FFFFFFFFFFFFEp+62)) + return 1; + if (test__floatuntitf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62)) + return 1; + if (test__floatuntitf(0x7FFFFFFFFFFFF000ULL, 0x1.FFFFFFFFFFFFCp+62)) + return 1; + if (test__floatuntitf(0x7FFFFFFFFFFFFFFFULL, 0xF.FFFFFFFFFFFFFFEp+59L)) + return 1; + if (test__floatuntitf(0xFFFFFFFFFFFFFFFEULL, 0xF.FFFFFFFFFFFFFFEp+60L)) + return 1; + if (test__floatuntitf(0xFFFFFFFFFFFFFFFFULL, 0xF.FFFFFFFFFFFFFFFp+60L)) + return 1; + + if (test__floatuntitf(0x8000008000000000ULL, 0x8.000008p+60)) + return 1; + if (test__floatuntitf(0x8000000000000800ULL, 0x8.0000000000008p+60)) + return 1; + if (test__floatuntitf(0x8000010000000000ULL, 0x8.00001p+60)) + return 1; + if (test__floatuntitf(0x8000000000001000ULL, 0x8.000000000001p+60)) + return 1; + + if (test__floatuntitf(0x8000000000000000ULL, 0x8p+60)) + return 1; + if (test__floatuntitf(0x8000000000000001ULL, 0x8.000000000000001p+60L)) + return 1; + + if (test__floatuntitf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50)) + return 1; + + if (test__floatuntitf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50)) + return 1; + if (test__floatuntitf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50)) + return 1; + if (test__floatuntitf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50)) + return 1; + if (test__floatuntitf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50)) + return 1; + if (test__floatuntitf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50)) + return 1; + + if (test__floatuntitf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50)) + return 1; + if (test__floatuntitf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50)) + return 1; + if (test__floatuntitf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50)) + return 1; + if (test__floatuntitf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50)) + return 1; + if (test__floatuntitf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50)) + return 1; + + if (test__floatuntitf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57)) + return 1; + if (test__floatuntitf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496D08p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496D8p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496DCp+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496DBp+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496DF8p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496E08p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496E38p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496E4p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496E78p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496E8p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496E88p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496ECp+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496EF8p+57L)) + return 1; + if (test__floatuntitf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57)) + return 1; + + if (test__floatuntitf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496D08p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496D8p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496DCp+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496DBp+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496DF8p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496E08p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496E38p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496E4p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496E78p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496E8p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496E88p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496ECp+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496EF8p+121L)) + return 1; + if (test__floatuntitf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121L)) + return 1; + + if (test__floatuntitf(make_ti(0, 0xFFFFFFFFFFFFFFFFLL), 0x1.FFFFFFFFFFFFFFFEp+63L)) + return 1; + + if (test__floatuntitf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x0000000000000000LL), + 0x1.FFFFFFFFFFFFFFFEp+127L)) + return 1; + if (test__floatuntitf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), + 0x1.0000000000000000p+128L)) + return 1; + + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC2801LL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC3000LL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC37FFLL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC3800LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4000LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC47FFLL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4800LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4801LL), + 0x1.23456789ABCDEF0123456789ABC5p+124L)) + return 1; + if (test__floatuntitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC57FFLL), + 0x1.23456789ABCDEF0123456789ABC5p+124L)) + return 1; +#else + printf("skipped\n"); +#endif + return 0; +} Index: compiler-rt/trunk/test/builtins/Unit/floattitf_test.c =================================================================== --- compiler-rt/trunk/test/builtins/Unit/floattitf_test.c +++ compiler-rt/trunk/test/builtins/Unit/floattitf_test.c @@ -0,0 +1,213 @@ +//===-- floattitf.c - Test __floattitf ------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __floattitf for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" +#include "int_lib.h" +#include <float.h> +#include <stdio.h> + +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) + +/* Returns: convert a ti_int to a fp_t, rounding toward even. */ + +/* Assumption: fp_t is a IEEE 128 bit floating point type + * ti_int is a 128 bit integral type + */ + +/* seee eeee eeee eeee mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | + * mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ + +COMPILER_RT_ABI fp_t __floattitf(ti_int a); + +int test__floattitf(ti_int a, fp_t expected) { + fp_t x = __floattitf(a); + if (x != expected) { + twords at; + at.all = a; + printf("error in __floattitf(0x%.16llX%.16llX) = %LA, expected %LA\n", + at.s.high, at.s.low, x, expected); + } + return x != expected; +} + +char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; +char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0}; +char assumption_3[sizeof(fp_t)*CHAR_BIT == 128] = {0}; + +#endif + +int main() { +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) + if (test__floattitf(0, 0.0)) + return 1; + + if (test__floattitf(1, 1.0)) + return 1; + if (test__floattitf(2, 2.0)) + return 1; + if (test__floattitf(20, 20.0)) + return 1; + if (test__floattitf(-1, -1.0)) + return 1; + if (test__floattitf(-2, -2.0)) + return 1; + if (test__floattitf(-20, -20.0)) + return 1; + + if (test__floattitf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62)) + return 1; + if (test__floattitf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62)) + return 1; + if (test__floattitf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62)) + return 1; + if (test__floattitf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62)) + return 1; + + if (test__floattitf(make_ti(0x8000008000000000LL, 0), -0x1.FFFFFEp+126)) + return 1; + if (test__floattitf(make_ti(0x8000000000000800LL, 0), -0x1.FFFFFFFFFFFFEp+126)) + return 1; + if (test__floattitf(make_ti(0x8000010000000000LL, 0), -0x1.FFFFFCp+126)) + return 1; + if (test__floattitf(make_ti(0x8000000000001000LL, 0), -0x1.FFFFFFFFFFFFCp+126)) + return 1; + + if (test__floattitf(make_ti(0x8000000000000000LL, 0), -0x1.000000p+127)) + return 1; + if (test__floattitf(make_ti(0x8000000000000001LL, 0), -0x1.FFFFFFFFFFFFFFFCp+126L)) + return 1; + + if (test__floattitf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50)) + return 1; + + if (test__floattitf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50)) + return 1; + if (test__floattitf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50)) + return 1; + if (test__floattitf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50)) + return 1; + if (test__floattitf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50)) + return 1; + if (test__floattitf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50)) + return 1; + + if (test__floattitf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50)) + return 1; + if (test__floattitf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50)) + return 1; + if (test__floattitf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50)) + return 1; + if (test__floattitf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50)) + return 1; + if (test__floattitf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50)) + return 1; + + if (test__floattitf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57)) + return 1; + if (test__floattitf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496D08p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496D8p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496DCp+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496DBp+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496DF8p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496E08p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496E38p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496E4p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496E78p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496E8p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496E88p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496ECp+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496EF8p+57L)) + return 1; + if (test__floattitf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57)) + return 1; + + if (test__floattitf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496D08p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496D8p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496DCp+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496DBp+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496DF8p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496E08p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496E38p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496E4p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496E78p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496E8p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496E88p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496ECp+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496EF8p+121L)) + return 1; + if (test__floattitf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121L)) + return 1; + + if (test__floattitf(make_ti(0, 0xFFFFFFFFFFFFFFFFLL), 0x1.FFFFFFFFFFFFFFFEp+63L)) + return 1; + + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC2801LL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC3000LL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC37FFLL), + 0x1.23456789ABCDEF0123456789ABC3p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC3800LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4000LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC47FFLL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4800LL), + 0x1.23456789ABCDEF0123456789ABC4p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC4801LL), + 0x1.23456789ABCDEF0123456789ABC5p+124L)) + return 1; + if (test__floattitf(make_ti(0x123456789ABCDEF0LL, 0x123456789ABC57FFLL), + 0x1.23456789ABCDEF0123456789ABC5p+124L)) + return 1; +#else + printf("skipped\n"); +#endif + return 0; +} Index: compiler-rt/trunk/lib/builtins/floatuntitf.c =================================================================== --- compiler-rt/trunk/lib/builtins/floatuntitf.c +++ compiler-rt/trunk/lib/builtins/floatuntitf.c @@ -0,0 +1,79 @@ +//===-- lib/floatuntitf.c - uint128 -> quad-precision conversion --*- C -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements tu_int to quad-precision conversion for the +// compiler-rt library in the IEEE-754 default round-to-nearest, ties-to-even +// mode. +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" +#include "int_lib.h" + +/* Returns: convert a tu_int to a fp_t, rounding toward even. */ + +/* Assumption: fp_t is a IEEE 128 bit floating point type + * tu_int is a 128 bit integral type + */ + +/* seee eeee eeee eeee mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | + * mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ + +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) +COMPILER_RT_ABI fp_t +__floatuntitf(tu_int a) { + if (a == 0) + return 0.0; + const unsigned N = sizeof(tu_int) * CHAR_BIT; + int sd = N - __clzti2(a); /* number of significant digits */ + int e = sd - 1; /* exponent */ + if (sd > LDBL_MANT_DIG) { + /* start: 0000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQxxxxxxxxxxxxxxxxxx + * finish: 000000000000000000000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQR + * 12345678901234567890123456 + * 1 = msb 1 bit + * P = bit LDBL_MANT_DIG-1 bits to the right of 1 + * Q = bit LDBL_MANT_DIG bits to the right of 1 + * R = "or" of all bits to the right of Q + */ + switch (sd) { + case LDBL_MANT_DIG + 1: + a <<= 1; + break; + case LDBL_MANT_DIG + 2: + break; + default: + a = (a >> (sd - (LDBL_MANT_DIG+2))) | + ((a & ((tu_int)(-1) >> ((N + LDBL_MANT_DIG+2) - sd))) != 0); + }; + /* finish: */ + a |= (a & 4) != 0; /* Or P into R */ + ++a; /* round - this step may add a significant bit */ + a >>= 2; /* dump Q and R */ + /* a is now rounded to LDBL_MANT_DIG or LDBL_MANT_DIG+1 bits */ + if (a & ((tu_int)1 << LDBL_MANT_DIG)) { + a >>= 1; + ++e; + } + /* a is now rounded to LDBL_MANT_DIG bits */ + } else { + a <<= (LDBL_MANT_DIG - sd); + /* a is now rounded to LDBL_MANT_DIG bits */ + } + + long_double_bits fb; + fb.u.high.all = (du_int)(e + 16383) << 48 /* exponent */ + | ((a >> 64) & 0x0000ffffffffffffLL); /* significand */ + fb.u.low.all = (du_int)(a); + return fb.f; +} + +#endif Index: compiler-rt/trunk/lib/builtins/CMakeLists.txt =================================================================== --- compiler-rt/trunk/lib/builtins/CMakeLists.txt +++ compiler-rt/trunk/lib/builtins/CMakeLists.txt @@ -415,8 +415,10 @@ fixunstfti.c floatditf.c floatsitf.c + floattitf.c floatunditf.c floatunsitf.c + floatuntitf.c multc3.c trunctfdf2.c trunctfsf2.c Index: compiler-rt/trunk/lib/builtins/floattitf.c =================================================================== --- compiler-rt/trunk/lib/builtins/floattitf.c +++ compiler-rt/trunk/lib/builtins/floattitf.c @@ -0,0 +1,82 @@ +//===-- lib/floattitf.c - int128 -> quad-precision conversion -----*- C -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements ti_int to quad-precision conversion for the +// compiler-rt library in the IEEE-754 default round-to-nearest, ties-to-even +// mode. +// +//===----------------------------------------------------------------------===// + +#define QUAD_PRECISION +#include "fp_lib.h" +#include "int_lib.h" + +/* Returns: convert a ti_int to a fp_t, rounding toward even. */ + +/* Assumption: fp_t is a IEEE 128 bit floating point type + * ti_int is a 128 bit integral type + */ + +/* seee eeee eeee eeee mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | + * mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm + */ + +#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT) +COMPILER_RT_ABI fp_t +__floattitf(ti_int a) { + if (a == 0) + return 0.0; + const unsigned N = sizeof(ti_int) * CHAR_BIT; + const ti_int s = a >> (N-1); + a = (a ^ s) - s; + int sd = N - __clzti2(a); /* number of significant digits */ + int e = sd - 1; /* exponent */ + if (sd > LDBL_MANT_DIG) { + /* start: 0000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQxxxxxxxxxxxxxxxxxx + * finish: 000000000000000000000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQR + * 12345678901234567890123456 + * 1 = msb 1 bit + * P = bit LDBL_MANT_DIG-1 bits to the right of 1 + * Q = bit LDBL_MANT_DIG bits to the right of 1 + * R = "or" of all bits to the right of Q + */ + switch (sd) { + case LDBL_MANT_DIG + 1: + a <<= 1; + break; + case LDBL_MANT_DIG + 2: + break; + default: + a = ((tu_int)a >> (sd - (LDBL_MANT_DIG+2))) | + ((a & ((tu_int)(-1) >> ((N + LDBL_MANT_DIG+2) - sd))) != 0); + }; + /* finish: */ + a |= (a & 4) != 0; /* Or P into R */ + ++a; /* round - this step may add a significant bit */ + a >>= 2; /* dump Q and R */ + /* a is now rounded to LDBL_MANT_DIG or LDBL_MANT_DIG+1 bits */ + if (a & ((tu_int)1 << LDBL_MANT_DIG)) { + a >>= 1; + ++e; + } + /* a is now rounded to LDBL_MANT_DIG bits */ + } else { + a <<= (LDBL_MANT_DIG - sd); + /* a is now rounded to LDBL_MANT_DIG bits */ + } + + long_double_bits fb; + fb.u.high.all = (s & 0x8000000000000000LL) /* sign */ + | (du_int)(e + 16383) << 48 /* exponent */ + | ((a >> 64) & 0x0000ffffffffffffLL); /* significand */ + fb.u.low.all = (du_int)(a); + return fb.f; +} + +#endif
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