(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 137 insertions, 123 deletions

diff --git a/sysdeps/ia64/fpu/s_nearbyintl.S b/sysdeps/ia64/fpu/s_nearbyintl.S
index ee6159c67c..95ba6ab260 100644
--- a/sysdeps/ia64/fpu/s_nearbyintl.S
+++ b/sysdeps/ia64/fpu/s_nearbyintl.S
@@ -1,10 +1,11 @@
 .file "nearbyintl.s"
 
-
-// Copyright (c) 2000 - 2003, Intel Corporation
+// Copyright (C) 2000, 2001, Intel Corporation
 // All rights reserved.
-//
-// Contributed 2000 by the Intel Numerics Group, Intel Corporation
+// 
+// Contributed 10/19/2000 by John Harrison, Cristina Iordache, Ted Kubaska,
+// Bob Norin, Tom Rowan, Shane Story, and Ping Tak Peter Tang of the
+// Computational Software Lab, Intel Corporation.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -20,67 +21,73 @@
 // * 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
+//
+// 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
+// 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
+// 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.
-//
+// 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.
+// problem reports or change requests be submitted to it directly at 
+// http://developer.intel.com/opensource.
 //
 // History
 //==============================================================
-// 10/19/00 Created
-// 02/08/01 Corrected behavior for all rounding modes.
-// 05/20/02 Cleaned up namespace and sf0 syntax
-// 02/10/03 Reordered header: .section, .global, .proc, .align
-// 07/25/03 Improved performance
+// 10/19/2000: Created
+// 2/08/01  Corrected behavior for all rounding modes.
 //==============================================================
-
+//
 // API
 //==============================================================
 // long double nearbyintl(long double x)
-//==============================================================
 
-// general input registers:
-// r14 - r21
+#include "libm_support.h"
+
+//
+// general registers used:  
+//
+
+nearbyint_GR_signexp   = r14
+nearbyint_GR_exponent  = r15
+nearbyint_GR_17ones    = r16
+nearbyint_GR_10033     = r17
+nearbyint_GR_fpsr      = r18
+nearbyint_GR_rcs0      = r19
+nearbyint_GR_rcs0_mask = r20
 
-rSignexp   = r14
-rExp       = r15
-rExpMask   = r16
-rBigexp    = r17
-rFpsr      = r19
-rRcs0      = r20
-rRcs0Mask  = r21
 
-// floating-point registers:
-// f8 - f10
+// predicate registers used: 
+// p6-11
 
-fXInt      = f9
-fNormX     = f10
+// floating-point registers used: 
 
-// predicate registers used:
-// p6 - p10
+NEARBYINT_NORM_f8      = f9                        
+NEARBYINT_FLOAT_INT_f8 = f10
+NEARBYINT_INT_f8       = f11
+NEARBYINT_SIGNED_FLOAT_INT_f8 = f12
 
 // Overview of operation
 //==============================================================
+
 // long double nearbyintl(long double x)
-// Return an integer value (represented as a long double) that is x
-// rounded to integer in current rounding mode
-// Inexact is not set, otherwise result identical with rint.
-//==============================================================
+// Return an integer value (represented as a long double) that is 
+// x rounded to integer in current rounding mode 
+// *******************************************************************************
+
+// Set denormal flag for denormal input and
+// and take denormal fault if necessary.
+
+// Is the input an integer value already?
 
 // double_extended
-// if the exponent is > 1003e => 3F(true) = 63(decimal)
+// 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.
@@ -93,125 +100,132 @@ fNormX     = f10
 // 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
+// if the exponent is >= 10016 => 17(true) = 23(decimal)
+// 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.
 
+// If x is NAN, ZERO, or INFINITY, then  return
+
+// qnan snan inf norm     unorm 0 -+
+// 1    1    1   0        0     1 11     0xe7
+
+
+.align 32
+.global nearbyintl#
+
 .section .text
-GLOBAL_LIBM_ENTRY(nearbyintl)
+.proc  nearbyintl#
+.align 32
+
+
+nearbyintl: 
 
 { .mfi
-      getf.exp         rSignexp  = f8        // Get signexp, recompute if unorm
-      fclass.m         p7,p0 = f8, 0x0b      // Test x unorm
-      addl             rBigexp = 0x1003e, r0 // Set exponent at which is integer
+      mov nearbyint_GR_fpsr = ar40           // Read the fpsr--need to check rc.s0
+      fcvt.fx.s1     NEARBYINT_INT_f8  = f8
+      addl            nearbyint_GR_10033 = 0x1003e, r0
 }
 { .mfi
-      nop.m            0
-      fcvt.fx.s1       fXInt  = f8           // Convert to int in significand
-      mov              rExpMask    = 0x1FFFF // Form exponent mask
-}
+      nop.m 999
+      fnorm.s1        NEARBYINT_NORM_f8  = f8
+      mov         nearbyint_GR_17ones    = 0x1FFFF
 ;;
+}
 
 { .mfi
-      mov              rFpsr = ar40          // Read fpsr -- check rc.s0
-      fclass.m         p6,p0 = f8, 0x1e3     // Test x natval, nan, inf
-      nop.i            0
-}
-{ .mfb
-      nop.m            0
-      fnorm.s1         fNormX  = f8          // Normalize input
-(p7)  br.cond.spnt     RINT_UNORM            // Branch if x unorm
-}
+      nop.m 999
+      fclass.m.unc  p6,p0 = f8, 0xe7
+      mov         nearbyint_GR_rcs0_mask  = 0x0c00
 ;;
+}
 
-
-RINT_COMMON:
-// Return here from RINT_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
-}
+	nop.m 999
+(p6)  fnorm f8 = f8
+(p6)  br.ret.spnt   b0    // Exit if x nan, inf, zero
 ;;
-
-{ .mfi
-      mov              rRcs0Mask = 0x0c00     // Mask for rc.s0
-      fcvt.xf          f8 = fXInt             // Result assume |x| < 2^63
-      cmp.ge           p7,p8 = rExp, rBigexp  // Is |x| >= 2^63?
 }
-;;
 
-// We must correct result if |x| >= 2^63
 { .mfi
-      nop.m            0
-(p7)  fma.s0           f8 = fNormX, f1, f0    // If |x| >= 2^63, result x
-      nop.i            0
-}
+	nop.m 999
+      fcvt.xf         NEARBYINT_FLOAT_INT_f8   = NEARBYINT_INT_f8
+	nop.i 999
 ;;
-
-{ .mfi
-      nop.m            0
-(p8)  fmerge.s         f8 = fNormX, f8        // Make sign nearbyintl(x)= sign x
-      nop.i            0
 }
-;;
 
 { .mfi
-(p8)  and              rRcs0 = rFpsr, rRcs0Mask // Get rounding mode for sf0
-      nop.f            0
-      nop.i            0
-}
+      getf.exp nearbyint_GR_signexp  = NEARBYINT_NORM_f8
+      fcmp.eq.s0  p8,p0 = f8,f0      // Dummy op to set denormal
+        nop.i 999
 ;;
-
-// If |x| < 2^63 we must test for other rounding modes
-{ .mbb
-(p8)  cmp.ne.unc       p10,p0 = rRcs0, r0     // Test for other rounding modes
-(p10) br.cond.spnt     RINT_NOT_ROUND_NEAREST // Branch if not round nearest
-      br.ret.sptk      b0                     // Exit main path if round nearest
 }
+
+
+{ .mii
+	nop.m 999
+	nop.i 999 
+      and      nearbyint_GR_exponent = nearbyint_GR_signexp, nearbyint_GR_17ones
 ;;
+}
 
+{ .mmi
+      cmp.ge.unc      p7,p6 = nearbyint_GR_exponent, nearbyint_GR_10033
+      and nearbyint_GR_rcs0 = nearbyint_GR_rcs0_mask, nearbyint_GR_fpsr
+	nop.i 999
+;;
+}
 
-RINT_UNORM:
-// Here if x unorm
+// Check to see if s0 rounding mode is round to nearest.  If not then set s2
+// rounding mode to that of s0 and repeat conversions.
+// Must merge the original sign for cases where the result is zero or the input
+// is the largest that still has a fraction (0x1007dfffffffffff)
+L(NEARBYINT_COMMON):
 { .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     RINT_COMMON            // Return to main path
-}
+      cmp.ne   p11,p0 = nearbyint_GR_rcs0, r0
+(p6) fmerge.s  NEARBYINT_SIGNED_FLOAT_INT_f8 = f8, NEARBYINT_FLOAT_INT_f8
+(p11) br.cond.spnt L(NEARBYINT_NOT_ROUND_NEAREST)  // Branch if not round to nearest
 ;;
+}
 
-RINT_NOT_ROUND_NEAREST:
-// Here if not round to nearest, and |x| < 2^63
-// Set rounding mode of s2 to that of s0, and repeat the conversion using s2
 { .mfi
-      nop.m            0
-      fsetc.s2         0x7f, 0x40
-      nop.i            0
+	nop.m 999
+(p7) fnorm.s0   f8 = f8
+	nop.i 999
+;;
 }
+
+{ .mfb
+      nop.m 999
+(p6) fnorm f8 = NEARBYINT_SIGNED_FLOAT_INT_f8
+     br.ret.sptk    b0
 ;;
+}
+
 
+L(NEARBYINT_NOT_ROUND_NEAREST):
+// Set rounding mode of s2 to that of s0
 { .mfi
-      nop.m            0
-      fcvt.fx.s2       fXInt  = fNormX        // Convert to int in significand
-      nop.i            0
-}
+      mov nearbyint_GR_rcs0 = r0       // Clear so we don't come back here
+      fsetc.s2     0x7f, 0x40
+	nop.i 999
 ;;
+}
 
 { .mfi
-      nop.m            0
-      fcvt.xf          f8 = fXInt             // Expected result
-      nop.i            0
-}
+	nop.m 999
+      fcvt.fx.s2     NEARBYINT_INT_f8  = f8
+	nop.i 999
 ;;
+}
 
-// Be sure sign of result = sign of input.  Fixes cases where result is 0.
 { .mfb
-      nop.m            0
-      fmerge.s         f8 = fNormX, f8
-      br.ret.sptk      b0                     // Exit main path
-}
+	nop.m 999
+      fcvt.xf         NEARBYINT_FLOAT_INT_f8   = NEARBYINT_INT_f8
+      br.cond.sptk  L(NEARBYINT_COMMON)
 ;;
+}
+
 
-GLOBAL_LIBM_END(nearbyintl)
+.endp nearbyintl
+ASM_SIZE_DIRECTIVE(nearbyintl)