Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 166 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/ia64/fpu/s_truncl.S b/REORG.TODO/sysdeps/ia64/fpu/s_truncl.S
new file mode 100644
index 0000000000..1afa19ba2b
--- /dev/null
+++ b/REORG.TODO/sysdeps/ia64/fpu/s_truncl.S
@@ -0,0 +1,166 @@
+.file "truncl.s"
+
+
+// Copyright (c) 2000 - 2003, Intel Corporation
+// All rights reserved.
+//
+// Contributed 2000 by the Intel Numerics Group, Intel Corporation
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// * The name of Intel Corporation may not be used to endorse or promote
+// products derived from this software without specific prior written
+// permission.
+
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
+// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Intel Corporation is the author of this code, and requests that all
+// problem reports or change requests be submitted to it directly at
+// http://www.intel.com/software/products/opensource/libraries/num.htm.
+//
+// History
+//==============================================================
+// 07/07/00 Created
+// 05/20/02 Cleaned up namespace and sf0 syntax
+// 01/20/03 Improved performance and reduced code size
+//==============================================================
+
+// API
+//==============================================================
+// long double truncl(long double x)
+//==============================================================
+
+// general input registers:
+// r14 - r18
+
+rExpBias   = r14
+rSignexp   = r15
+rExp       = r16
+rExpMask   = r17
+rBigexp    = r18
+
+// floating-point registers:
+// f8 - f10
+
+fXtruncInt = f9
+fNormX     = f10
+
+// predicate registers used:
+// p6, p7
+
+// Overview of operation
+//==============================================================
+// long double truncl(long double x)
+// Return an integer value (represented as a long double) less than or
+// equal to x in magnitude.
+// This is x rounded toward zero to an integral value.
+//==============================================================
+
+// double_extended
+// if the exponent is > 1003e => 3F(true) = 63(decimal)
+// we have a significand of 64 bits 1.63-bits.
+// If we multiply by 2^63, we no longer have a fractional part
+// So input is an integer value already.
+
+// double
+// if the exponent is >= 10033 => 34(true) = 52(decimal)
+// 34 + 3ff = 433
+// we have a significand of 53 bits 1.52-bits. (implicit 1)
+// If we multiply by 2^52, we no longer have a fractional part
+// So input is an integer value already.
+
+// single
+// if the exponent is > 10016 => 17(true) = 23(decimal)
+// we have a significand of 24 bits 1.23-bits. (implicit 1)
+// If we multiply by 2^23, we no longer have a fractional part
+// So input is an integer value already.
+
+.section .text
+GLOBAL_LIBM_ENTRY(truncl)
+
+{ .mfi
+      getf.exp         rSignexp  = f8        // Get signexp, recompute if unorm
+      fcvt.fx.trunc.s1 fXtruncInt  = f8      // Convert to int in significand
+      addl             rBigexp = 0x1003e, r0 // Set exponent at which is integer
+}
+{ .mfi
+      mov              rExpBias    = 0x0FFFF // Form exponent bias
+      fnorm.s1         fNormX  = f8          // Normalize input
+      mov              rExpMask    = 0x1FFFF // Form exponent mask
+}
+;;
+
+{ .mfi
+      nop.m            0
+      fclass.m         p7,p0 = f8, 0x0b      // Test x unorm
+      nop.i            0
+}
+;;
+
+{ .mfb
+      nop.m            0
+      fclass.m         p6,p0 = f8, 0x1e3     // Test x natval, nan, inf
+(p7)  br.cond.spnt     TRUNC_UNORM           // Branch if x unorm
+}
+;;
+
+TRUNC_COMMON:
+// Return here from TRUNC_UNORM
+{ .mfb
+      and              rExp = rSignexp, rExpMask // Get biased exponent
+(p6)  fma.s0           f8 = f8, f1, f0       // Result if x natval, nan, inf
+(p6)  br.ret.spnt      b0                    // Exit if x natval, nan, inf
+}
+;;
+
+{ .mfi
+      cmp.lt           p6,p0 = rExp, rExpBias // Is |x| < 1?
+      fcvt.xf          f8 = fXtruncInt        // Result, assume 1 <= |x| < 2^63
+      cmp.ge           p7,p0 = rExp, rBigexp  // Is |x| >= 2^63?
+}
+;;
+
+// We must correct result if |x| < 1, or |x| >= 2^63
+.pred.rel "mutex",p6,p7
+{ .mfi
+      nop.m            0
+(p6)  fmerge.s         f8 = fNormX, f0        // If |x| < 1, result sgn(x)*0
+      nop.i            0
+}
+{ .mfb
+      nop.m            0
+(p7)  fma.s0           f8 = fNormX, f1, f0    // If |x| >= 2^63, result x
+      br.ret.sptk      b0                     // Exit main path
+}
+;;
+
+
+TRUNC_UNORM:
+// Here if x unorm
+{ .mfb
+      getf.exp         rSignexp  = fNormX     // Get signexp, recompute if unorm
+      fcmp.eq.s0       p7,p0 = f8, f0         // Dummy op to set denormal flag
+      br.cond.sptk     TRUNC_COMMON           // Return to main path
+}
+;;
+
+GLOBAL_LIBM_END(truncl)