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-.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)