e_acosf.s

Glibc 2.3.2源代码(解压后有100多M)

 
{     .mfi 
     nop.m                 999
     fcmp.gt.s1 p9,p0 = acosf_abs_x,f1
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                 999
     fma.s1    acosf_x8  =    acosf_x4,acosf_x4,f0
     nop.i                 999
} 
{     .mfb 
     nop.m                      999
     fma.s1    acosf_t4  =    acosf_t2,acosf_t2,f0
(p6) br.cond.spnt  L(ACOSF_ABS_ONE) ;;     // Branch if |x|=1
} 

{     .mfi 
     nop.m                 999
     fma.s1    acosf_x5  =    acosf_x2,acosf_x3,f0
     nop.i                 999
}
{     .mfb 
(p9) mov            GR_Parameter_TAG = 59
     fma.s1    acosf_yby2     =    acosf_t,acosf_1by2,f0
(p9) br.cond.spnt  __libm_error_region ;;    // Branch if |x|>1
}


{     .mfi 
     nop.m                 999
     fma.s1    acosf_Az  =    acosf_t,acosf_B,f0
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
     fma.s1    acosf_B2  =    acosf_B,acosf_B,f0
     nop.i                 999;;
}
 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p1  =    f8,acosf_coeff_P1,f0
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p1 =    acosf_coeff_P1,acosf_t,f1
     nop.i                      999;;
}

{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p3  =    acosf_coeff_P4,acosf_x2,acosf_coeff_P3
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p6 =    acosf_coeff_P7,acosf_t,acosf_coeff_P6
     nop.i                      999;;
} 

{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p7  =    acosf_x2,acosf_coeff_P8,acosf_coeff_P7
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p2 =    acosf_coeff_P3,acosf_t,acosf_coeff_P2
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p5  =    acosf_x2,acosf_coeff_P6,acosf_coeff_P5
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p4 =    acosf_coeff_P5,acosf_t,acosf_coeff_P4
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                 999
     fma.s1    acosf_x11 =    acosf_x8,acosf_x3,f0
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
     fnma.s1   acosf_dz  =    acosf_B2,acosf_yby2,acosf_1by2
     nop.i                 999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p1a =    acosf_x2,acosf_poly_p1,f8
     nop.i                      999
}
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p8 =    acosf_coeff_P9,acosf_t,acosf_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 = acosf_abs_x,acosf_const_sqrt2by2
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p2  =    acosf_x2,acosf_poly_p3,acosf_coeff_P2
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_poly_p7a =    acosf_x4,acosf_coeff_P9,acosf_poly_p7
     nop.i                      999
} 
{     .mfi 
     nop.m                      999
     fma.s1    acosf_2poly_p2a =    acosf_2poly_p2,acosf_t2,acosf_2poly_p1
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                                                         999
(p8) fma.s1    acosf_sgnx_t4  =    acosf_sgn_x,acosf_t4,f0
     nop.i                                                         999
} 
{     .mfi 
     nop.m                      999
(p8) fma.s1    acosf_2poly_p4a =    acosf_2poly_p6,acosf_t2,acosf_2poly_p4
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                 999
(p8) fma.s1    acosf_Sz  =    acosf_5by2,acosf_dz,acosf_3by2
     nop.i                 999
} 
{     .mfi 
     nop.m                 999
(p8) fma.s1    acosf_d2z =    acosf_dz,acosf_dz,f0
     nop.i                 999;;
}

 
{     .mfi 
     nop.m                           999
(p8) fnma.d.s1   acosf_sgn_x_piby2 =    acosf_sgn_x,acosf_const_piby2,acosf_const_piby2
     nop.i                           999
} 
{     .mfi 
     nop.m                      999
(p7) fma.s1    acosf_poly_Ax  =    acosf_x5,acosf_poly_p2,acosf_poly_p1a
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                      999
(p7) fma.s1    acosf_poly_Bx  =    acosf_x4,acosf_poly_p7a,acosf_poly_p5
     nop.i                      999
} 
{     .mfi 
     nop.m                           999
(p8) fma.s1    acosf_sgnx_2poly_p2 =    acosf_sgn_x,acosf_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    acosf_2poly_p4b =    acosf_2poly_p8,acosf_t4,acosf_2poly_p4a
     nop.i                      999;;
}

 
{     .mfi 
     nop.m                      999
(p8) fma.s1    acosf_Fz  =    acosf_d2z,acosf_Sz,acosf_dz
     nop.i                 999;;
} 

 
{     .mfi 
     nop.m                 999
(p8) fma.d.s1  acosf_Pt  =    acosf_2poly_p4b,acosf_sgnx_t4,acosf_sgnx_2poly_p2
     nop.i                 999;;
} 
 
{     .mfi 
     nop.m                 999
(p8) fma.d.s1  acosf_z   =    acosf_Az,acosf_Fz,acosf_Az
     nop.i                 999 ;;
} 
 
{     .mfi 
     nop.m                      999
(p7) fma.d.s1  acosf_sinf1    =    acosf_x11,acosf_poly_Bx,acosf_poly_Ax
     nop.i                      999;;
} 
 
.pred.rel "mutex",p8,p7    //acosf_pred_GTsqrt2by2,acosf_pred_LEsqrt2by2
{     .mfi 
      nop.m            999
(p8)  fma.s     f8   =    acosf_z,acosf_Pt,acosf_sgn_x_piby2
      nop.i            999
} 
 
{     .mfb 
      nop.m            999
(p7)  fms.s     f8   =    acosf_const_piby2,f1,acosf_sinf1
      br.ret.sptk b0 ;;
} 

L(ACOSF_ZERO):
// Here if x=0
{     .mfb 
      nop.m                 999
      fma.s    f8 =    acosf_const_piby2,f1,f0  // acosf(0)=pi/2
      br.ret.sptk b0 ;;
} 


L(ACOSF_ABS_ONE):
.pred.rel "mutex",p11,p12
// Here if |x|=1
{     .mfi 
      nop.m                 999
(p11) fma.s    f8 =    acosf_const_piby2,f1,acosf_const_piby2 // acosf(-1)=pi
      nop.i                 999
} 
{     .mfb 
      nop.m                 999
(p12) fma.s    f8 =    f1,f0,f0 // acosf(1)=0
      br.ret.sptk b0 ;;
} 

.endp acosf
ASM_SIZE_DIRECTIVE(acosf)


// 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


.proc __libm_error_region
__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
};;

.endp __libm_error_region
ASM_SIZE_DIRECTIVE(__libm_error_region)

.type   __libm_error_support#,@function
.global __libm_error_support#