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authorAnton Samokhvalov <pg83@yandex.ru>2022-02-10 16:45:15 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:45:15 +0300
commit72cb13b4aff9bc9cf22e49251bc8fd143f82538f (patch)
treeda2c34829458c7d4e74bdfbdf85dff449e9e7fb8 /contrib/libs/cxxsupp/builtins/floattixf.c
parent778e51ba091dc39e7b7fcab2b9cf4dbedfb6f2b5 (diff)
downloadydb-72cb13b4aff9bc9cf22e49251bc8fd143f82538f.tar.gz
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/floattixf.c')
-rw-r--r--contrib/libs/cxxsupp/builtins/floattixf.c168
1 files changed, 84 insertions, 84 deletions
diff --git a/contrib/libs/cxxsupp/builtins/floattixf.c b/contrib/libs/cxxsupp/builtins/floattixf.c
index 1203b3a96e..a63e238940 100644
--- a/contrib/libs/cxxsupp/builtins/floattixf.c
+++ b/contrib/libs/cxxsupp/builtins/floattixf.c
@@ -1,84 +1,84 @@
-/* ===-- floattixf.c - Implement __floattixf -------------------------------===
- *
- * 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 __floattixf for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
- */
-
-#include "int_lib.h"
-
-#ifdef CRT_HAS_128BIT
-
-/* Returns: convert a to a long double, rounding toward even. */
-
-/* Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits
- * ti_int is a 128 bit integral type
- */
-
-/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
- * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
- */
-
-COMPILER_RT_ABI long double
-__floattixf(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.s.low = ((su_int)s & 0x8000) | /* sign */
- (e + 16383); /* exponent */
- fb.u.low.all = (du_int)a; /* mantissa */
- return fb.f;
-}
-
-#endif /* CRT_HAS_128BIT */
+/* ===-- floattixf.c - Implement __floattixf -------------------------------===
+ *
+ * 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 __floattixf for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+#ifdef CRT_HAS_128BIT
+
+/* Returns: convert a to a long double, rounding toward even. */
+
+/* Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits
+ * ti_int is a 128 bit integral type
+ */
+
+/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
+ * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
+ */
+
+COMPILER_RT_ABI long double
+__floattixf(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.s.low = ((su_int)s & 0x8000) | /* sign */
+ (e + 16383); /* exponent */
+ fb.u.low.all = (du_int)a; /* mantissa */
+ return fb.f;
+}
+
+#endif /* CRT_HAS_128BIT */