svn commit: r281223 - in head: contrib/compiler-rt/lib/builtins lib/libcompiler_rt
Ed Maste
emaste at FreeBSD.org
Tue Apr 7 19:31:31 UTC 2015
Author: emaste
Date: Tue Apr 7 19:31:29 2015
New Revision: 281223
URL: https://svnweb.freebsd.org/changeset/base/281223
Log:
compiler-rt: add floatditf and floatunditf
These are long integer (di_int/du_int) to quad precision floating point
conversions. They may be reworked based on upstream discussion. These
versions are here to support arm64 world builds.
Reviewed by: ed
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2174
Added:
head/contrib/compiler-rt/lib/builtins/floatditf.c (contents, props changed)
head/contrib/compiler-rt/lib/builtins/floatunditf.c (contents, props changed)
Modified:
head/lib/libcompiler_rt/Makefile
Added: head/contrib/compiler-rt/lib/builtins/floatditf.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/contrib/compiler-rt/lib/builtins/floatditf.c Tue Apr 7 19:31:29 2015 (r281223)
@@ -0,0 +1,52 @@
+//===-- lib/floatditf.c - integer -> 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 di_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"
+
+#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
+COMPILER_RT_ABI fp_t __floatditf(di_int a) {
+
+ const int aWidth = sizeof a * CHAR_BIT;
+
+ // Handle zero as a special case to protect clz
+ if (a == 0)
+ return fromRep(0);
+
+ // All other cases begin by extracting the sign and absolute value of a
+ rep_t sign = 0;
+ unsigned aAbs = (unsigned)a;
+ if (a < 0) {
+ sign = signBit;
+ aAbs += 0x80000000;
+ }
+
+ // Exponent of (fp_t)a is the width of abs(a).
+ const int exponent = (aWidth - 1) - __builtin_clz(a);
+ rep_t result;
+
+ // Shift a into the significand field and clear the implicit bit. Extra
+ // cast to unsigned int is necessary to get the correct behavior for
+ // the input INT_MIN.
+ const int shift = significandBits - exponent;
+ result = (rep_t)aAbs << shift ^ implicitBit;
+
+ // Insert the exponent
+ result += (rep_t)(exponent + exponentBias) << significandBits;
+ // Insert the sign bit and return
+ return fromRep(result | sign);
+}
+
+#endif
Added: head/contrib/compiler-rt/lib/builtins/floatunditf.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/contrib/compiler-rt/lib/builtins/floatunditf.c Tue Apr 7 19:31:29 2015 (r281223)
@@ -0,0 +1,40 @@
+//===-- lib/floatunditf.c - uint -> 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 du_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"
+
+#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
+COMPILER_RT_ABI fp_t __floatunditf(du_int a) {
+
+ const int aWidth = sizeof a * CHAR_BIT;
+
+ // Handle zero as a special case to protect clz
+ if (a == 0) return fromRep(0);
+
+ // Exponent of (fp_t)a is the width of abs(a).
+ const int exponent = (aWidth - 1) - __builtin_clz(a);
+ rep_t result;
+
+ // Shift a into the significand field and clear the implicit bit.
+ const int shift = significandBits - exponent;
+ result = (rep_t)a << shift ^ implicitBit;
+
+ // Insert the exponent
+ result += (rep_t)(exponent + exponentBias) << significandBits;
+ return fromRep(result);
+}
+
+#endif
Modified: head/lib/libcompiler_rt/Makefile
==============================================================================
--- head/lib/libcompiler_rt/Makefile Tue Apr 7 19:30:54 2015 (r281222)
+++ head/lib/libcompiler_rt/Makefile Tue Apr 7 19:31:29 2015 (r281223)
@@ -78,6 +78,7 @@ SRCF= absvdi2 \
fixxfti \
floatdidf \
floatdisf \
+ floatditf \
floatdixf \
floatsitf \
floattidf \
@@ -85,6 +86,7 @@ SRCF= absvdi2 \
floattixf \
floatundidf \
floatundisf \
+ floatunditf \
floatundixf \
floatunsidf \
floatunsisf \
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