Update compiler_rt to 18.1.8

commit_hash:047370d533b6571fd08cc42584b9f72ca1f8d98d

1 files changed, 5 insertions, 47 deletions

diff --git a/contrib/libs/cxxsupp/builtins/floatdidf.c b/contrib/libs/cxxsupp/builtins/floatdidf.c
index d37c43b1f2f..6da81f7a05b 100644
--- a/contrib/libs/cxxsupp/builtins/floatdidf.c
+++ b/contrib/libs/cxxsupp/builtins/floatdidf.c
@@ -45,53 +45,11 @@ COMPILER_RT_ABI double __floatdidf(di_int a) {
 // flags to set, and we don't want to code-gen to an unknown soft-float
 // implementation.
 
-COMPILER_RT_ABI double __floatdidf(di_int a) {
-  if (a == 0)
-    return 0.0;
-  const unsigned N = sizeof(di_int) * CHAR_BIT;
-  const di_int s = a >> (N - 1);
-  a = (a ^ s) - s;
-  int sd = N - __builtin_clzll(a); // number of significant digits
-  int e = sd - 1;                  // exponent
-  if (sd > DBL_MANT_DIG) {
-    //  start:  0000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQxxxxxxxxxxxxxxxxxx
-    //  finish: 000000000000000000000000000000000000001xxxxxxxxxxxxxxxxxxxxxxPQR
-    //                                                12345678901234567890123456
-    //  1 = msb 1 bit
-    //  P = bit DBL_MANT_DIG-1 bits to the right of 1
-    // Q = bit DBL_MANT_DIG bits to the right of 1
-    //  R = "or" of all bits to the right of Q
-    switch (sd) {
-    case DBL_MANT_DIG + 1:
-      a <<= 1;
-      break;
-    case DBL_MANT_DIG + 2:
-      break;
-    default:
-      a = ((du_int)a >> (sd - (DBL_MANT_DIG + 2))) |
-          ((a & ((du_int)(-1) >> ((N + DBL_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 DBL_MANT_DIG or DBL_MANT_DIG+1 bits
-    if (a & ((du_int)1 << DBL_MANT_DIG)) {
-      a >>= 1;
-      ++e;
-    }
-    // a is now rounded to DBL_MANT_DIG bits
-  } else {
-    a <<= (DBL_MANT_DIG - sd);
-    // a is now rounded to DBL_MANT_DIG bits
-  }
-  double_bits fb;
-  fb.u.s.high = ((su_int)s & 0x80000000) |        // sign
-                ((su_int)(e + 1023) << 20) |      // exponent
-                ((su_int)(a >> 32) & 0x000FFFFF); // mantissa-high
-  fb.u.s.low = (su_int)a;                         // mantissa-low
-  return fb.f;
-}
+#define SRC_I64
+#define DST_DOUBLE
+#include "int_to_fp_impl.inc"
+
+COMPILER_RT_ABI double __floatdidf(di_int a) { return __floatXiYf__(a); }
 #endif
 
 #if defined(__ARM_EABI__)