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Diffstat (limited to 'sysdeps/ia64/fpu/s_trunc.S')
| -rw-r--r-- | sysdeps/ia64/fpu/s_trunc.S | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/sysdeps/ia64/fpu/s_trunc.S b/sysdeps/ia64/fpu/s_trunc.S deleted file mode 100644 index b9ad03b5a8..0000000000 --- a/sysdeps/ia64/fpu/s_trunc.S +++ /dev/null @@ -1,166 +0,0 @@ -.file "trunc.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 -//============================================================== -// double trunc(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 -//============================================================== -// double trunc(double x) -// Return an integer value (represented as a 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(trunc) - -{ .mfi - getf.exp rSignexp = f8 // Get signexp, recompute if unorm - fcvt.fx.trunc.s1 fXtruncInt = f8 // Convert to int in significand - addl rBigexp = 0x10033, 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.d.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| < 2^52 - cmp.ge p7,p0 = rExp, rBigexp // Is |x| >= 2^52? -} -;; - -// We must correct result if |x| < 1, or |x| >= 2^52 -.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.d.s0 f8 = fNormX, f1, f0 // If |x| >= 2^52, 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(trunc) |