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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/ppc/fixunstfdi.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/ppc/fixunstfdi.c')
-rw-r--r--contrib/libs/cxxsupp/builtins/ppc/fixunstfdi.c118
1 files changed, 59 insertions, 59 deletions
diff --git a/contrib/libs/cxxsupp/builtins/ppc/fixunstfdi.c b/contrib/libs/cxxsupp/builtins/ppc/fixunstfdi.c
index 5e6e2cedf6..277f30ecca 100644
--- a/contrib/libs/cxxsupp/builtins/ppc/fixunstfdi.c
+++ b/contrib/libs/cxxsupp/builtins/ppc/fixunstfdi.c
@@ -1,59 +1,59 @@
-/* This file is distributed under the University of Illinois Open Source
- * License. See LICENSE.TXT for details.
- */
-
-/* uint64_t __fixunstfdi(long double x); */
-/* This file implements the PowerPC 128-bit double-double -> uint64_t conversion */
-
-#include "DD.h"
-
-uint64_t __fixunstfdi(long double input)
-{
- const DD x = { .ld = input };
- const doublebits hibits = { .d = x.s.hi };
-
- const uint32_t highWordMinusOne = (uint32_t)(hibits.x >> 32) - UINT32_C(0x3ff00000);
-
- /* If (1.0 - tiny) <= input < 0x1.0p64: */
- if (UINT32_C(0x04000000) > highWordMinusOne)
- {
- const int unbiasedHeadExponent = highWordMinusOne >> 20;
-
- uint64_t result = hibits.x & UINT64_C(0x000fffffffffffff); /* mantissa(hi) */
- result |= UINT64_C(0x0010000000000000); /* matissa(hi) with implicit bit */
- result <<= 11; /* mantissa(hi) left aligned in the int64 field. */
-
- /* If the tail is non-zero, we need to patch in the tail bits. */
- if (0.0 != x.s.lo)
- {
- const doublebits lobits = { .d = x.s.lo };
- int64_t tailMantissa = lobits.x & INT64_C(0x000fffffffffffff);
- tailMantissa |= INT64_C(0x0010000000000000);
-
- /* At this point we have the mantissa of |tail| */
-
- const int64_t negationMask = ((int64_t)(lobits.x)) >> 63;
- tailMantissa = (tailMantissa ^ negationMask) - negationMask;
-
- /* Now we have the mantissa of tail as a signed 2s-complement integer */
-
- const int biasedTailExponent = (int)(lobits.x >> 52) & 0x7ff;
-
- /* Shift the tail mantissa into the right position, accounting for the
- * bias of 11 that we shifted the head mantissa by.
- */
- tailMantissa >>= (unbiasedHeadExponent - (biasedTailExponent - (1023 - 11)));
-
- result += tailMantissa;
- }
-
- result >>= (63 - unbiasedHeadExponent);
- return result;
- }
-
- /* Edge cases are handled here, with saturation. */
- if (1.0 > x.s.hi)
- return UINT64_C(0);
- else
- return UINT64_MAX;
-}
+/* This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ */
+
+/* uint64_t __fixunstfdi(long double x); */
+/* This file implements the PowerPC 128-bit double-double -> uint64_t conversion */
+
+#include "DD.h"
+
+uint64_t __fixunstfdi(long double input)
+{
+ const DD x = { .ld = input };
+ const doublebits hibits = { .d = x.s.hi };
+
+ const uint32_t highWordMinusOne = (uint32_t)(hibits.x >> 32) - UINT32_C(0x3ff00000);
+
+ /* If (1.0 - tiny) <= input < 0x1.0p64: */
+ if (UINT32_C(0x04000000) > highWordMinusOne)
+ {
+ const int unbiasedHeadExponent = highWordMinusOne >> 20;
+
+ uint64_t result = hibits.x & UINT64_C(0x000fffffffffffff); /* mantissa(hi) */
+ result |= UINT64_C(0x0010000000000000); /* matissa(hi) with implicit bit */
+ result <<= 11; /* mantissa(hi) left aligned in the int64 field. */
+
+ /* If the tail is non-zero, we need to patch in the tail bits. */
+ if (0.0 != x.s.lo)
+ {
+ const doublebits lobits = { .d = x.s.lo };
+ int64_t tailMantissa = lobits.x & INT64_C(0x000fffffffffffff);
+ tailMantissa |= INT64_C(0x0010000000000000);
+
+ /* At this point we have the mantissa of |tail| */
+
+ const int64_t negationMask = ((int64_t)(lobits.x)) >> 63;
+ tailMantissa = (tailMantissa ^ negationMask) - negationMask;
+
+ /* Now we have the mantissa of tail as a signed 2s-complement integer */
+
+ const int biasedTailExponent = (int)(lobits.x >> 52) & 0x7ff;
+
+ /* Shift the tail mantissa into the right position, accounting for the
+ * bias of 11 that we shifted the head mantissa by.
+ */
+ tailMantissa >>= (unbiasedHeadExponent - (biasedTailExponent - (1023 - 11)));
+
+ result += tailMantissa;
+ }
+
+ result >>= (63 - unbiasedHeadExponent);
+ return result;
+ }
+
+ /* Edge cases are handled here, with saturation. */
+ if (1.0 > x.s.hi)
+ return UINT64_C(0);
+ else
+ return UINT64_MAX;
+}