2.5-18.1

1 files changed, 228 insertions, 0 deletions

diff --git a/sysdeps/ia64/fpu/s_fdimf.S b/sysdeps/ia64/fpu/s_fdimf.S
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+.file "fdimf.s"
+
+
+// Copyright (c) 2001 - 2003, Intel Corporation
+// All rights reserved.
+//
+// Contributed 2001 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
+//==============================================================
+// 06/08/01 Initial version
+// 08/23/01 Corrected error tag number
+// 05/20/02 Cleaned up namespace and sf0 syntax
+// 01/28/03 Improved performance; fixed parameters for call to error routine
+//
+// API
+//==============================================================
+// float fdimf( float x, float y );
+// input  floating point f8, f9
+// output floating point f8
+//
+//
+// Overview of operation
+//==============================================================
+// fdimf determines the positive difference between the arguments
+//   Result = x - y   if x > y
+//          = +0      if x <= y
+//
+// Error support is called if x-y overflows for x > y
+//
+
+// Registers used
+//==============================================================
+// General purpose registers: r14, r32 - r39
+
+rExpBig               = r14
+
+// r36-39 parameters for libm_error_support
+GR_SAVE_B0            = r33
+GR_SAVE_GP            = r34
+GR_SAVE_PFS           = r35
+
+GR_Parameter_X        = r36
+GR_Parameter_Y        = r37
+GR_Parameter_RESULT   = r38
+GR_Parameter_TAG      = r39
+
+// Floating-point registers: f8 - f12
+
+f_tmp_result          = f10
+fBig                  = f11
+fNormX                = f12
+
+// Predicate registers: p6 - p10
+
+
+.section .text
+GLOBAL_LIBM_ENTRY(fdimf)
+
+{ .mfi
+      mov             rExpBig = 0x1007f  // Exponent to indicate overflow
+      fcmp.le.s1      p6,p7 = f8, f9     // Is x <= y?
+      nop.i           0
+}
+{ .mfi
+      nop.m           0
+      fnorm.s1        fNormX = f8        // Save x
+      nop.i           0
+}
+;;
+
+{ .mfi
+      setf.exp        fBig = rExpBig     // Constant to test for overflow
+      fcmp.eq.s0      p8,p0 = f8, f9     // Dummy op to set Denormal or Invalid
+      nop.i           0
+}
+;;
+
+{ .mfi
+      nop.m           0
+      fclass.m        p9,p10 = f8, 0x1e3 // Test for x natval, nan, inf
+      nop.i           0
+}
+;;
+
+{ .mfi
+      nop.m           0
+(p6)  fmerge.s        f8 = f0, f0        // Result is +0 if x <= y
+      nop.i           0
+}
+{ .mfi
+      nop.m           0
+(p7)  fms.s.s0        f8 = f8, f1, f9    // Result is x - y if x > y
+      nop.i           0
+}
+;;
+
+{ .mfi
+      nop.m           0
+(p10) fclass.m        p9,p10 = f9, 0x1e3 // Test for y natval, nan, inf
+      nop.i           0
+}
+;;
+
+{ .mfi
+      nop.m           0
+(p10) fcmp.ge.s1      p8,p0 = f8, fBig   // Test result for overflow
+      nop.i           0
+}
+;;
+
+{ .mbb
+(p9)  cmp.ne          p8,p0 = r0,r0      // Clear p8 if x or y natval,nan,inf
+(p8)  br.cond.spnt    FDIM_OVERFLOW      // Branch if result overflows
+      br.ret.sptk     b0                 // Normal return
+}
+;;
+
+
+// Here if result will overflow
+FDIM_OVERFLOW:
+{ .mfi
+      alloc           r32=ar.pfs,2,2,4,0
+      fms.s.s0        f_tmp_result = f8,f1,f9 // Normalize result force overflow
+      nop.i           0
+}
+{ .mfb
+      mov             GR_Parameter_TAG = 197  // Error code
+      nop.f           0
+      br.cond.sptk    __libm_error_region     // Branch to error code
+}
+;;
+
+GLOBAL_LIBM_END(fdimf)
+
+
+LOCAL_LIBM_ENTRY(__libm_error_region)
+// Call error support to report possible range error
+.prologue
+
+{ .mfi
+        add   GR_Parameter_Y=-32,sp            // Parameter 2 value
+        nop.f 0
+.save   ar.pfs,GR_SAVE_PFS
+        mov  GR_SAVE_PFS=ar.pfs                // Save ar.pfs
+}
+{ .mfi
+.fframe 64
+        add sp=-64,sp                          // Create new stack
+        nop.f 0
+        mov GR_SAVE_GP=gp                      // Save gp
+};;
+
+{ .mmi
+        stfs [GR_Parameter_Y] = f9,16          // STORE Parameter 2 on stack
+        add GR_Parameter_X = 16,sp             // Parameter 1 address
+.save   b0, GR_SAVE_B0
+        mov GR_SAVE_B0=b0                      // Save b0
+};;
+
+.body
+{ .mib
+        stfs [GR_Parameter_X] = fNormX         // STORE Parameter 1 on stack
+        add   GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address
+        nop.b 0
+}
+{ .mib
+        stfs [GR_Parameter_Y] = f_tmp_result   // STORE Parameter 3 on stack
+        add   GR_Parameter_Y = -16,GR_Parameter_Y
+        br.call.sptk b0=__libm_error_support#  // Call error handling function
+};;
+
+{ .mmi
+        add   GR_Parameter_RESULT = 48,sp
+        nop.m 0
+        nop.i 0
+};;
+
+{ .mmi
+        ldfs  f8 = [GR_Parameter_RESULT]       // Get return result off stack
+.restore sp
+        add   sp = 64,sp                       // Restore stack pointer
+        mov   b0 = GR_SAVE_B0                  // Restore return address
+};;
+
+{ .mib
+        mov   gp = GR_SAVE_GP                  // Restore gp
+        mov   ar.pfs = GR_SAVE_PFS             // Restore ar.pfs
+        br.ret.sptk     b0                     // Return
+};;
+
+LOCAL_LIBM_END(__libm_error_region)
+
+
+.type   __libm_error_support#,@function
+.global __libm_error_support#
+