e_asinf.s

glibc 2.9,最新版的C语言库函数

(p8) fma.s.s0 f8                = f8,f1,f0
(p8) br.ret.spnt   b0 ;;  // Exit if x=nan
}

 
{     .mfb 
     nop.m                 999
     fcmp.eq.s1 p6,p0 = asinf_abs_x,f1
(p10) br.ret.spnt  b0 ;;     // Exit if x=0
} 
 
{     .mfi 
     nop.m                 999
     fcmp.gt.s1 p9,p0 = asinf_abs_x,f1
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                 999
     fma.s1    asinf_x8  =    asinf_x4,asinf_x4,f0
     nop.i                 999
} 
{     .mfb 
     nop.m                      999
     fma.s1    asinf_t4  =    asinf_t2,asinf_t2,f0
(p6) br.cond.spnt  ASINF_ABS_ONE ;;     // Branch if |x|=1
} 

{     .mfi 
     nop.m                 999
     fma.s1    asinf_x5  =    asinf_x2,asinf_x3,f0
     nop.i                 999
}
{     .mfb 
(p9) mov            GR_Parameter_TAG = 62
     fma.s1    asinf_yby2     =    asinf_t,asinf_1by2,f0
(p9) br.cond.spnt  __libm_error_region ;;    // Branch if |x|>1
}


{     .mfi 
     nop.m                 999
     fma.s1    asinf_Az  =    asinf_t,asinf_B,f0
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
     fma.s1    asinf_B2  =    asinf_B,asinf_B,f0
     nop.i                 999;;
}
 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p1  =    f8,asinf_coeff_P1,f0
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p1 =    asinf_coeff_P1,asinf_t,f1
     nop.i                      999;;
}

{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p3  =    asinf_coeff_P4,asinf_x2,asinf_coeff_P3
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p6 =    asinf_coeff_P7,asinf_t,asinf_coeff_P6
     nop.i                      999;;
} 

{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p7  =    asinf_x2,asinf_coeff_P8,asinf_coeff_P7
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p2 =    asinf_coeff_P3,asinf_t,asinf_coeff_P2
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p5  =    asinf_x2,asinf_coeff_P6,asinf_coeff_P5
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p4 =    asinf_coeff_P5,asinf_t,asinf_coeff_P4
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                 999
     fma.d.s1    asinf_x11 =    asinf_x8,asinf_x3,f0
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
     fnma.s1   asinf_dz  =    asinf_B2,asinf_yby2,asinf_1by2
     nop.i                 999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p1a =    asinf_x2,asinf_poly_p1,f8
     nop.i                      999
}
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p8 =    asinf_coeff_P9,asinf_t,asinf_coeff_P8
     nop.i                      999;;
}

 
// Get the absolute value of x and determine the region in which x lies

{     .mfi 
     nop.m                      999
     fcmp.le.s1     p7,p8 = asinf_abs_x,asinf_const_sqrt2by2
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p2  =    asinf_x2,asinf_poly_p3,asinf_coeff_P2
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_poly_p7a =    asinf_x4,asinf_coeff_P9,asinf_poly_p7
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    asinf_2poly_p2a =    asinf_2poly_p2,asinf_t2,asinf_2poly_p1
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                                                         999
(p8) fma.s1    asinf_sgnx_t4  =    asinf_sgn_x,asinf_t4,f0
     nop.i                                                         999
} 
{     .mfi 
     nop.m                      999
(p8) fma.s1    asinf_2poly_p4a =    asinf_2poly_p6,asinf_t2,asinf_2poly_p4
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                 999
(p8) fma.s1    asinf_Sz  =    asinf_5by2,asinf_dz,asinf_3by2
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
(p8) fma.s1    asinf_d2z =    asinf_dz,asinf_dz,f0
     nop.i                 999;;
}

 
{     .mfi 
     nop.m                           999
(p8) fma.s1   asinf_sgn_x_piby2 =    asinf_sgn_x,asinf_const_piby2,f0
     nop.i                           999
} 
{     .mfi 
     nop.m                      999
(p7) fma.d.s1    asinf_poly_Ax  =    asinf_x5,asinf_poly_p2,asinf_poly_p1a
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                      999
(p7) fma.d.s1    asinf_poly_Bx  =    asinf_x4,asinf_poly_p7a,asinf_poly_p5
     nop.i                      999
} 
{     .mfi 
     nop.m                           999
(p8) fma.s1    asinf_sgnx_2poly_p2 =    asinf_sgn_x,asinf_2poly_p2a,f0
     nop.i                           999;;
} 
 
{     .mfi 
     nop.m                      999
     fcmp.eq.s0 p6,p0 = f8,f0      // Only purpose is to set D if x denormal
     nop.i                      999
}
{     .mfi 
     nop.m                      999
(p8) fma.s1    asinf_2poly_p4b =    asinf_2poly_p8,asinf_t4,asinf_2poly_p4a
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
(p8) fma.s1    asinf_Fz  =    asinf_d2z,asinf_Sz,asinf_dz
     nop.i                      999;;
} 

 
{     .mfi 
     nop.m                 999
(p8) fma.d.s1  asinf_Pt  =    asinf_2poly_p4b,asinf_sgnx_t4,asinf_sgnx_2poly_p2
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                 999
(p8) fma.d.s1  asinf_z   =    asinf_Az,asinf_Fz,asinf_Az
     nop.i                 999;;
} 
 
.pred.rel "mutex",p8,p7    //asinf_pred_GTsqrt2by2,asinf_pred_LEsqrt2by2
{     .mfi 
                         nop.m            999
(p8)  fnma.s.s0     f8   =    asinf_z,asinf_Pt,asinf_sgn_x_piby2
                         nop.i            999
} 
 
{     .mfb 
                         nop.m            999
(p7)  fma.s.s0    f8    =    asinf_x11,asinf_poly_Bx,asinf_poly_Ax
                         br.ret.sptk b0 ;;
} 

ASINF_ABS_ONE:
// Here for short exit if |x|=1
{     .mfb 
     nop.m                      999
     fma.s.s0    f8 =    asinf_sgn_x,asinf_const_piby2,f0
     br.ret.sptk b0
} 
;;

GLOBAL_LIBM_END(asinf)

// Stack operations when calling error support.
//       (1)               (2)                  
//   sp   -> +          psp -> +               
//           |                 |     
//           |                 | <- GR_Y      
//           |                 |             
//           | <-GR_Y      Y2->|            
//           |                 |           
//           |                 | <- GR_X  
//           |                 |         
//  sp-64 -> +          sp ->  +        
//    save ar.pfs          save b0     
//    save gp                         


// Stack operations when calling error support.
//     (3) (call)              (4)
//  psp -> +                   sp -> +
//         |                         |
//    R3 ->| <- GR_RESULT            | -> f8
//         |                         |
//    Y2 ->| <- GR_Y                 |
//         |                         |
//    X1 ->|                         |
//         |                         |
//  sp ->  +                         +
//                              restore gp
//                              restore ar.pfs

LOCAL_LIBM_ENTRY(__libm_error_region)
.prologue
{ .mfi
        add   GR_Parameter_Y=-32,sp             // Parameter 2 value
                nop.f 999
.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] = f1,16         // 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
{ .mfi
        nop.m 0
        frcpa.s0 f9,p0 = f0,f0
        nop.i 0
};;

{ .mib
        stfs [GR_Parameter_X] = f8            // Store Parameter 1 on stack
        add   GR_Parameter_RESULT = 0,GR_Parameter_Y
        nop.b 0                                 // Parameter 3 address
}
{ .mib
        stfs [GR_Parameter_Y] = f9           // 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
        nop.m 0
        nop.m 0
        add   GR_Parameter_RESULT = 48,sp
};;

{ .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#