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

1 files changed, 145 insertions, 160 deletions

diff --git a/sysdeps/ia64/fpu/s_ilogb.S b/sysdeps/ia64/fpu/s_ilogb.S
index 0102370cd6..61975dd941 100644
--- a/sysdeps/ia64/fpu/s_ilogb.S
+++ b/sysdeps/ia64/fpu/s_ilogb.S
@@ -1,10 +1,10 @@
 .file "ilogb.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 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, 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
@@ -20,249 +20,234 @@
 // * 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
 //==============================================================
-// 02/03/00 Initial version
-// 05/26/00 Fix bug when x a double-extended denormal;
+// 2/03/00  Initial version
+// 5/26/00  Fix bug when x a double-extended denormal; 
 //          if x=0 call error routine, per C9X
-// 08/15/00 Bundle added after call to __libm_error_support to properly
+// 8/15/00  Bundle added after call to __libm_error_support to properly
 //          set [the previously overwritten] GR_Parameter_RESULT.
-// 01/20/01 Fixed result for x=0, corrected error tag value.
-// 05/20/02 Cleaned up namespace and sf0 syntax
-// 01/20/03 Improved performance
-//
+// 1/20/01  Fixed result for x=0, corrected error tag value.
+
+.align 32
+.global ilogb#
+
+.section .text
+.proc  ilogb#
+.align 32
+
 // API
 //==============================================================
-// int ilogb( double x );
-//
+// int = ilogb(double)
+
 // Overview of operation
 //==============================================================
-// The ilogb function extracts the exponent of x as an integer
+// ilogb computes log2(x) as an int
 // and returns it in r8
-//
-// ilogb is similar to logb but differs in the following ways:
+
+// ilogb is similar to logb but differs in the  following ways:
 //         +-inf
 //            ilogb: returns INT_MAX
 //             logb: returns +inf
-//         Nan  returns FP_LOGBNAN (which is either INT_MAX or INT_MIN)
+//         Nan  returns FP_ILOGBNAN (which is either INT_MAX or INT_MIN)
 //            ilogb: returns INT_MAX (7fffffff)
-//             logb: returns QNAN (quietized SNAN)
+//             logb: returns QNAN (quieted SNAN)
 //         0    returns FP_ILOGB0 (which is either INT_MIN or -INT_MAX)
-//            ilogb: returns -INT_MAX (80000001)
-//             logb: returns -inf, raises the divide-by-zero exception,
-//                   and calls libm_error_support to set domain error
-//
+//            ilogb: returns INT_MIN (80000000)
+//             logb: returns -inf
+
 // Registers used
 //==============================================================
-// general registers used:
-// r26 -> r39
-// r36 -> r39 used as parameters to error path
-//
-// predicate registers used:
-// p6 -> p10
-// floating-point registers used:
-// f9, f10, f11
-// f8, input
 
-rExpBias            = r26
-rExpMask            = r27
-rSignexp_x          = r28
-rExp_x              = r29
-rIntMax             = r30
-rExp_2to64          = r31
+// general local registers: 
+// ar.pfs r32
+// r33 -> r37
+// r38 -> r41 used as parameters to error path
+
+// predicate registers used: 
+// p6 - x nan, inf
+// p7 - x 0
+// p8 - x norm, unorm
+// p9 - x unorm
+
+// floating-point registers used: 
+// f8 - f10
+
+#include "libm_support.h"
 
 GR_SAVE_PFS         = r32
-rTrialResult        = r33
 GR_SAVE_B0          = r34
 GR_SAVE_GP          = r35
+GR_Parameter_X      = r38
+GR_Parameter_Y      = r39
+GR_Parameter_RESULT = r40
+GR_Parameter_TAG    = r41
 
-GR_Parameter_X      = r36
-GR_Parameter_Y      = r37
-GR_Parameter_RESULT = r38
-GR_Parameter_TAG    = r39
+FR_X                = f8
+FR_Y                = f0
+FR_RESULT           = f0
 
-fTmp                = f9
-fNorm_x             = f10
-f2to64              = f11
 
-.section .text
-GLOBAL_LIBM_ENTRY(ilogb)
+ilogb: 
 
-// X NORMAL
-// TrueExp_x = exp(f8) - 0xffff
-// r8 = TrueExp_x
-{ .mfi
-      getf.exp        rSignexp_x = f8
-      fclass.m        p8,p0 = f8, 0x0b   // Test for x unorm
-      mov             rExpBias = 0xffff  // Exponent bias
+// Form signexp of 2^64 in case need to scale denormal
+{ .mmf
+      alloc          r32=ar.pfs,1,5,4,0
+(p0)  mov      r37 = 0x1003f
+(p0)  fnorm    f9 = f8 ;;
 }
+
+// Form 2^64 in case need to scale denormal
 { .mfi
-      nop.m           0
-      fnorm.s1        fNorm_x = f8
-      mov             rExpMask = 0x1ffff // Exponent mask
+(p0)  setf.exp f10 = r37
+(p0)  fclass.m.unc p7, p8 = f8, 0xe3        
+(p0)  mov      r34 = 0xffff ;;
 }
-;;
 
-// Form signexp of 2^64 in case need to scale denormal
-{ .mfb
-      mov             rExp_2to64 = 0x1003f
-      fclass.m        p6,p9 = f8, 0x1e3  // Test x natval, nan, inf
-(p8)  br.cond.spnt    ILOGB_DENORM       // Branch if x unorm
-}
-;;
+// qnan snan inf norm     unorm 0 -+
+// 1    1    1   0        0     0 11
+// e                      3
+// X ZERO, returns INT_MIN
+// X INF or NAN, returns INT_MAX
 
-ILOGB_COMMON:
-// Return here from ILOGB_DENORM
 { .mfi
-      and             rExp_x = rSignexp_x, rExpMask // Get biased exponent
-      fclass.m        p7,p10 = f8, 0x07   // Test x zero
-      nop.i           0
+(p0)  mov      r35 = 0x1ffff
+(p8)    fclass.m.unc p6, p8 = f8, 0x07
+	nop.i 999 ;;
 }
 { .mlx
-      nop.m           0
-      movl            rIntMax = 0x000000007fffffff // Form INT_MAX
+	nop.m 999
+(p7)    movl r8 = 0x000000007fffffff ;;       
 }
-;;
 
-.pred.rel "mutex",p6,p9
-{ .mfi
-(p9)  sub             r8 = rExp_x, rExpBias // Get true exponent for normal path
-(p6)  fma.s0          fTmp = f8, f8, f0     // Dummy to set Invalid flag
-(p6)  mov             r8 = rIntMax          // If nan, inf, return INT_MAX
-}
-{ .mbb
-      nop.m           0
-(p7)  br.cond.spnt    ILOGB_ZERO            // Branch if x zero
-(p10) br.ret.sptk     b0                    // Exit if x not zero
+{ .mib
+	nop.m 999
+	nop.i 999
+(p6)    br.cond.spnt  L(ILOGB_ZERO) ;;
 }
-;;
-
 
-ILOGB_DENORM:
-// Form 2^64 in case need to scale denormal
-// Check to see if double-extended denormal
+// Test for denormal
 { .mfi
-      setf.exp        f2to64 = rExp_2to64
-      fclass.m        p8,p0 = fNorm_x, 0x0b
-      nop.i           0
+	nop.m 999
+(p8)    fclass.m.unc p9, p0 = f9, 0x0b        
+	nop.i 999 ;;
 }
-;;
 
-{ .mfi
-      nop.m           0
-      fcmp.eq.s0      p7,p0 = f8, f0           // Dummy op to set denormal flag
-      nop.i           0
+L(ILOGB_COMMON):
+// X NORMAL returns true exponent
+{ .mmi
+	nop.m 999 
+(p8)    getf.exp r33 = f9
+	nop.i 999 ;;
 }
-;;
 
-// If double-extended denormal add 64 to exponent bias for scaling
-// If double-extended denormal form x * 2^64 which is normal
-{ .mfi
-(p8)  add             rExpBias = 64, rExpBias
-(p8)  fmpy.s1         fNorm_x = fNorm_x, f2to64
-      nop.i           0
+// If denormal add 64 to exponent bias for scaling
+{ .mfb
+(p9)    add     r34 = 64, r34   
+	nop.f 999 
+(p9)    br.cond.spnt  L(ILOGB_DENORM) ;;
 }
-;;
 
-// Logic is the same as normal path but use normalized input
-{ .mib
-      getf.exp        rSignexp_x = fNorm_x
-      nop.i           0
-      br.cond.sptk    ILOGB_COMMON             // Return to main path
+{ .mmi
+(p8)    and      r36 = r35, r33
+	nop.m 999
+	nop.i 999 ;;
 }
-;;
 
-ILOGB_ZERO:
-// Here if x zero
-// Return INT_MIN, call error support
-
-{ .mlx
-      alloc           r32=ar.pfs,1,3,4,0
-      movl            rTrialResult = 0x0000000080000000
-}
 { .mib
-      mov             GR_Parameter_TAG = 157  // Error code
-      nop.i           0
-      br.cond.sptk    __libm_error_region     // Call error support
+(p8)    sub r8 = r36, r34                  
+	nop.i 999
+(p0)    br.ret.sptk    b0 ;;                     
 }
-;;
 
-GLOBAL_LIBM_END(ilogb)
+L(ILOGB_DENORM):
+// Here if x denormal
+// Form x * 2^64 which is normal
+// Return to common code
+{ .mfb
+        cmp.eq p8,p9 = r0,r0
+        fmpy f9 = f9, f10
+        br.cond.sptk  L(ILOGB_COMMON) ;;
+}
 
+// X ZERO
+// return INT_MIN, call error support
+L(ILOGB_ZERO): 
+{.mlx
+      mov            GR_Parameter_TAG = 157
+(p6)  movl r33 = 0x0000000080000000 ;;
+};;
+.endp ilogb
+ASM_SIZE_DIRECTIVE(ilogb)
 
-LOCAL_LIBM_ENTRY(__libm_error_region)
+.proc __libm_error_region
+__libm_error_region:
 .prologue
-
 { .mfi
-        add   GR_Parameter_Y=-32,sp           // Parameter 2 value
+        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
+        mov  GR_SAVE_PFS=ar.pfs                 // Save ar.pfs
 }
 { .mfi
 .fframe 64
-        add sp=-64,sp                         // Create new stack
+        add sp=-64,sp                           // Create new stack
         nop.f 0
-        mov GR_SAVE_GP=gp                     // Save gp
+        mov GR_SAVE_GP=gp                       // Save gp
 };;
-
 { .mmi
-        stfd [GR_Parameter_Y] = f0,16         // STORE Parameter 2 on stack
-        add GR_Parameter_X    = 16,sp         // Parameter 1 address
+        stfd [GR_Parameter_Y] = FR_Y,16         // Save 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
+        mov GR_SAVE_B0=b0                       // Save b0
 };;
-
 .body
 { .mib
-        stfd [GR_Parameter_X] = f8            // STORE Parameter 1 on stack
-        add   GR_Parameter_RESULT = 0,GR_Parameter_Y    // Parameter 3 address
-        nop.b 0
+        stfd [GR_Parameter_X] = FR_X            // Store Parameter 1 on stack
+        add   GR_Parameter_RESULT = 0,GR_Parameter_Y
+        nop.b 0                                 // Parameter 3 address
 }
 { .mib
-        stfd [GR_Parameter_Y] = f9            // Store Parameter 3 on stack
+        stfd [GR_Parameter_Y] = FR_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
+        br.call.sptk b0=__libm_error_support#  // Call error handling function
 };;
-
 { .mmi
-        add   GR_Parameter_RESULT = 48,sp
         nop.m 0
-        nop.i 0
+        nop.m 0
+        add   GR_Parameter_RESULT = 48,sp
 };;
-
 { .mmi
-        mov   r8 = rTrialResult
+        mov   r8 = r33                         // Store result
 .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
+        br.ret.sptk     b0                     // Return
 };;
 
-LOCAL_LIBM_END(__libm_error_region)
-
+.endp __libm_error_region
+ASM_SIZE_DIRECTIVE(__libm_error_region)
 
 .type   __libm_error_support#,@function
 .global __libm_error_support#