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|
.file "acos.s"
// Copyright (C) 2000, 2001, Intel Corporation
// All rights reserved.
//
// 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
// 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.
//
// WARRANTY DISCLAIMER
//
// 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://developer.intel.com/opensource.
// History
//==============================================================
// 2/02/00 Initial version
// 8/17/00 New and much faster algorithm.
// 8/30/00 Avoided bank conflicts on loads, shortened |x|=1 and x=0 paths,
// fixed mfb split issue stalls.
// Description
//=========================================
// The acos function computes the principle value of the arc sine of x.
// A doman error occurs for arguments not in the range [-1,+1].
// The acos function returns the arc cosine in the range [0, +pi] radians.
// acos(1) returns +0, acos(-1) returns pi, acos(0) returns pi/2.
// acos(x) returns a Nan and raises the invalid exception for |x| >1
// The acos function is just like asin except that pi/2 is added at the end.
//
// Assembly macros
//=========================================
#include "libm_support.h"
// predicate registers
//acos_pred_LEsqrt2by2 = p7
//acos_pred_GTsqrt2by2 = p8
// integer registers
ASIN_Addr1 = r33
ASIN_Addr2 = r34
ASIN_FFFE = r35
GR_SAVE_B0 = r36
GR_SAVE_PFS = r37
GR_SAVE_GP = r38
GR_Parameter_X = r39
GR_Parameter_Y = r40
GR_Parameter_RESULT = r41
GR_Parameter_Tag = r42
// floating point registers
acos_coeff_P1 = f32
acos_coeff_P2 = f33
acos_coeff_P3 = f34
acos_coeff_P4 = f35
acos_coeff_P5 = f36
acos_coeff_P6 = f37
acos_coeff_P7 = f38
acos_coeff_P8 = f39
acos_coeff_P9 = f40
acos_coeff_P10 = f41
acos_coeff_P11 = f42
acos_coeff_P12 = f43
acos_coeff_P13 = f44
acos_coeff_P14 = f45
acos_coeff_P15 = f46
acos_coeff_P16 = f47
acos_coeff_P17 = f48
acos_coeff_P18 = f49
acos_coeff_P19 = f50
acos_coeff_P20 = f51
acos_coeff_P21 = f52
acos_const_sqrt2by2 = f53
acos_const_piby2 = f54
acos_abs_x = f55
acos_tx = f56
acos_tx2 = f57
acos_tx3 = f58
acos_tx4 = f59
acos_tx8 = f60
acos_tx11 = f61
acos_1poly_p8 = f62
acos_1poly_p19 = f63
acos_1poly_p4 = f64
acos_1poly_p15 = f65
acos_1poly_p6 = f66
acos_1poly_p17 = f67
acos_1poly_p0 = f68
acos_1poly_p11 = f69
acos_1poly_p2 = f70
acos_1poly_p13 = f71
acos_series_tx = f72
acos_t = f73
acos_t2 = f74
acos_t3 = f75
acos_t4 = f76
acos_t8 = f77
acos_t11 = f78
acos_poly_p8 = f79
acos_poly_p19 = f80
acos_poly_p4 = f81
acos_poly_p15 = f82
acos_poly_p6 = f83
acos_poly_p17 = f84
acos_poly_p0 = f85
acos_poly_p11 = f86
acos_poly_p2 = f87
acos_poly_p13 = f88
acos_series_t = f89
acos_1by2 = f90
acos_3by2 = f91
acos_5by2 = f92
acos_11by4 = f93
acos_35by8 = f94
acos_63by8 = f95
acos_231by16 = f96
acos_y0 = f97
acos_H0 = f98
acos_S0 = f99
acos_d = f100
acos_l1 = f101
acos_d2 = f102
acos_T0 = f103
acos_d1 = f104
acos_e0 = f105
acos_l2 = f106
acos_d3 = f107
acos_T3 = f108
acos_S1 = f109
acos_e1 = f110
acos_z = f111
answer2 = f112
acos_sgn_x = f113
acos_429by16 = f114
acos_18by4 = f115
acos_3by4 = f116
acos_l3 = f117
acos_T6 = f118
acos_const_add = f119
// Data tables
//==============================================================
#ifdef _LIBC
.rodata
#else
.data
#endif
.align 16
acos_coeff_1_table:
ASM_TYPE_DIRECTIVE(acos_coeff_1_table,@object)
data8 0xE4E7E0A423A21249 , 0x00003FF8 //P7
data8 0xC2F7EE0200FCE2A5 , 0x0000C003 //P18
data8 0xB745D7F6C65C20E0 , 0x00003FF9 //P5
data8 0xF75E381A323D4D94 , 0x0000C002 //P16
data8 0x8959C2629C1024C0 , 0x0000C002 //P20
data8 0xAFF68E7D241292C5 , 0x00003FF8 //P9
data8 0xB6DB6DB7260AC30D , 0x00003FFA //P3
data8 0xD0417CE2B41CB7BF , 0x0000C000 //P14
data8 0x81D570FEA724E3E4 , 0x0000BFFD //P12
data8 0xAAAAAAAAAAAAC277 , 0x00003FFC //P1
data8 0xF534912FF3E7B76F , 0x00003FFF //P21
data8 0xc90fdaa22168c235 , 0x00003fff // pi/2
data8 0x0000000000000000 , 0x00000000 // pad to avoid bank conflicts
ASM_SIZE_DIRECTIVE(acos_coeff_1_table)
acos_coeff_2_table:
ASM_TYPE_DIRECTIVE(acos_coeff_2_table,@object)
data8 0x8E26AF5F29B39A2A , 0x00003FF9 //P6
data8 0xB4F118A4B1015470 , 0x00004003 //P17
data8 0xF8E38E10C25990E0 , 0x00003FF9 //P4
data8 0x80F50489AEF1CAC6 , 0x00004002 //P15
data8 0x92728015172CFE1C , 0x00004003 //P19
data8 0xBBC3D831D4595971 , 0x00003FF8 //P8
data8 0x999999999952A5C3 , 0x00003FFB //P2
data8 0x855576BE6F0975EC , 0x00003FFF //P13
data8 0xF12420E778077D89 , 0x00003FFA //P11
data8 0xB6590FF4D23DE003 , 0x00003FF3 //P10
data8 0xb504f333f9de6484 , 0x00003ffe // sqrt(2)/2
ASM_SIZE_DIRECTIVE(acos_coeff_2_table)
.align 32
.global acos
ASM_TYPE_DIRECTIVE(acos,@function)
.section .text
.proc acos
.align 32
acos:
{ .mfi
alloc r32 = ar.pfs,1,6,4,0
fma.s1 acos_tx = f8,f8,f0
addl ASIN_Addr2 = @ltoff(acos_coeff_2_table),gp
}
{ .mfi
mov ASIN_FFFE = 0xFFFE
fnma.s1 acos_t = f8,f8,f1
addl ASIN_Addr1 = @ltoff(acos_coeff_1_table),gp
}
;;
{ .mfi
setf.exp acos_1by2 = ASIN_FFFE
fmerge.s acos_abs_x = f1,f8
nop.i 999 ;;
}
{ .mmf
ld8 ASIN_Addr1 = [ASIN_Addr1]
ld8 ASIN_Addr2 = [ASIN_Addr2]
fmerge.s acos_sgn_x = f8,f1
}
;;
{ .mfi
nop.m 999
fcmp.lt.s1 p11,p12 = f8, f0
nop.i 999 ;;
}
{ .mfi
ldfe acos_coeff_P7 = [ASIN_Addr1],16
fma.s1 acos_tx2 = acos_tx,acos_tx,f0
nop.i 999
}
{ .mfi
ldfe acos_coeff_P6 = [ASIN_Addr2],16
fma.s1 acos_t2 = acos_t,acos_t,f0
nop.i 999;;
}
{ .mmf
ldfe acos_coeff_P18 = [ASIN_Addr1],16
ldfe acos_coeff_P17 = [ASIN_Addr2],16
fclass.m.unc p8,p0 = f8, 0xc3 //@qnan |@snan
}
;;
{ .mmf
ldfe acos_coeff_P5 = [ASIN_Addr1],16
ldfe acos_coeff_P4 = [ASIN_Addr2],16
frsqrta.s1 acos_y0,p0 = acos_t
}
;;
{ .mfi
ldfe acos_coeff_P16 = [ASIN_Addr1],16
fcmp.gt.s1 p9,p0 = acos_abs_x,f1
nop.i 999
}
{ .mfb
ldfe acos_coeff_P15 = [ASIN_Addr2],16
(p8) fma.d f8 = f8,f1,f0
(p8) br.ret.spnt b0
}
;;
{ .mmf
ldfe acos_coeff_P20 = [ASIN_Addr1],16
ldfe acos_coeff_P19 = [ASIN_Addr2],16
fclass.m.unc p10,p0 = f8, 0x07 //@zero
}
;;
{ .mfi
ldfe acos_coeff_P9 = [ASIN_Addr1],16
fma.s1 acos_t4 = acos_t2,acos_t2,f0
(p9) mov GR_Parameter_Tag = 58
}
{ .mfi
ldfe acos_coeff_P8 = [ASIN_Addr2],16
fma.s1 acos_3by2 = acos_1by2,f1,f1
nop.i 999;;
}
{ .mfi
ldfe acos_coeff_P2 = [ASIN_Addr2],16
fma.s1 acos_tx4 = acos_tx2,acos_tx2,f0
nop.i 999
}
{ .mfb
ldfe acos_coeff_P3 = [ASIN_Addr1],16
fma.s1 acos_t3 = acos_t,acos_t2,f0
(p9) br.cond.spnt __libm_error_region
}
;;
{ .mfi
ldfe acos_coeff_P13 = [ASIN_Addr2],16
fma.s1 acos_H0 = acos_y0,acos_1by2,f0
nop.i 999
}
{ .mfi
ldfe acos_coeff_P14 = [ASIN_Addr1],16
fma.s1 acos_S0 = acos_y0,acos_t,f0
nop.i 999;;
}
{ .mfi
ldfe acos_coeff_P11 = [ASIN_Addr2],16
fcmp.eq.s1 p6,p0 = acos_abs_x, f1
nop.i 999
}
{ .mfi
ldfe acos_coeff_P12 = [ASIN_Addr1],16
fma.s1 acos_tx3 = acos_tx,acos_tx2,f0
nop.i 999
}
;;
{ .mfi
ldfe acos_coeff_P10 = [ASIN_Addr2],16
fma.s1 acos_1poly_p6 = acos_tx,acos_coeff_P7,acos_coeff_P6
nop.i 999
}
{ .mfi
ldfe acos_coeff_P1 = [ASIN_Addr1],16
fma.s1 acos_poly_p6 = acos_t,acos_coeff_P7,acos_coeff_P6
nop.i 999;;
}
{ .mfi
ldfe acos_const_sqrt2by2 = [ASIN_Addr2],16
fma.s1 acos_5by2 = acos_3by2,f1,f1
nop.i 999
}
{ .mfi
ldfe acos_coeff_P21 = [ASIN_Addr1],16
fma.s1 acos_11by4 = acos_3by2,acos_3by2,acos_1by2
nop.i 999;;
}
{ .mfi
ldfe acos_const_piby2 = [ASIN_Addr1],16
fma.s1 acos_poly_p17 = acos_t,acos_coeff_P18,acos_coeff_P17
nop.i 999
}
{ .mfb
nop.m 999
fma.s1 acos_3by4 = acos_3by2,acos_1by2,f0
(p10) br.cond.spnt L(ACOS_ZERO) // Branch to short path if x=0
}
;;
{ .mfi
nop.m 999
fma.s1 acos_poly_p15 = acos_t,acos_coeff_P16,acos_coeff_P15
nop.i 999
}
{ .mfb
nop.m 999
fnma.s1 acos_d = acos_S0,acos_H0,acos_1by2
(p6) br.cond.spnt L(ACOS_ABS_ONE) // Branch to short path if |x|=1
}
;;
{ .mfi
nop.m 999
fma.s1 acos_poly_p19 = acos_t,acos_coeff_P20,acos_coeff_P19
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p4 = acos_t,acos_coeff_P5,acos_coeff_P4
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p17 = acos_tx,acos_coeff_P18,acos_coeff_P17
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p8 = acos_t,acos_coeff_P9,acos_coeff_P8
nop.i 999;;
}
{ .mfi
nop.m 999
fms.s1 acos_35by8 = acos_5by2,acos_11by4,acos_5by2
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_63by8 = acos_5by2,acos_11by4,f1
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p13 = acos_t,acos_coeff_P14,acos_coeff_P13
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_18by4 = acos_3by2,acos_5by2,acos_3by4
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_l1 = acos_5by2,acos_d,acos_3by2
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_d2 = acos_d,acos_d,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p15 = acos_t2,acos_poly_p17,acos_poly_p15
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_T0 = acos_d,acos_S0,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p19 = acos_t2,acos_coeff_P21,acos_poly_p19
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p4 = acos_t2,acos_poly_p6,acos_poly_p4
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_d1 = acos_35by8,acos_d,f0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_231by16 = acos_3by2,acos_35by8,acos_63by8
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p2 = acos_t,acos_coeff_P3,acos_coeff_P2
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p8 = acos_t2,acos_coeff_P10,acos_poly_p8
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p11 = acos_t,acos_coeff_P12,acos_coeff_P11
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_e0 = acos_d2,acos_l1,acos_d
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p15 = acos_tx,acos_coeff_P16,acos_coeff_P15
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p0 = acos_t,acos_coeff_P1,f1
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p19 = acos_tx,acos_coeff_P20,acos_coeff_P19
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p4 = acos_tx,acos_coeff_P5,acos_coeff_P4
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p8 = acos_tx,acos_coeff_P9,acos_coeff_P8
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_l2 = acos_231by16,acos_d,acos_63by8
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_d3 = acos_d2,acos_d,f0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_T3 = acos_d2,acos_T0,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_429by16 = acos_18by4,acos_11by4,acos_231by16
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_S1 = acos_e0,acos_S0,acos_S0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p4 = acos_t4,acos_poly_p8,acos_poly_p4
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p15 = acos_t4,acos_poly_p19,acos_poly_p15
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p0 = acos_t2,acos_poly_p2,acos_poly_p0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p11 = acos_t2,acos_poly_p13,acos_poly_p11
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_t8 = acos_t4,acos_t4,f0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_e1 = acos_d2,acos_l2,acos_d1
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p4 = acos_tx2,acos_1poly_p6,acos_1poly_p4
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p15 = acos_tx2,acos_1poly_p17,acos_1poly_p15
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p8 = acos_tx2,acos_coeff_P10,acos_1poly_p8
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p19 = acos_tx2,acos_coeff_P21,acos_1poly_p19
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p2 = acos_tx,acos_coeff_P3,acos_coeff_P2
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p13 = acos_tx,acos_coeff_P14,acos_coeff_P13
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p0 = acos_tx,acos_coeff_P1,f1
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p11 = acos_tx,acos_coeff_P12,acos_coeff_P11
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_l3 = acos_429by16,acos_d,f0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_z = acos_e1,acos_T3,acos_S1
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p11 = acos_t4,acos_poly_p15,acos_poly_p11
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_T6 = acos_T3,acos_d3,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_t11 = acos_t8,acos_t3,f0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_poly_p0 = acos_t4,acos_poly_p4,acos_poly_p0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p4 = acos_tx4,acos_1poly_p8,acos_1poly_p4
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p15 = acos_tx4,acos_1poly_p19,acos_1poly_p15
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p0 = acos_tx2,acos_1poly_p2,acos_1poly_p0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p11 = acos_tx2,acos_1poly_p13,acos_1poly_p11
nop.i 999;;
}
{ .mfi
nop.m 999
// fcmp.le.s1 acos_pred_LEsqrt2by2,acos_pred_GTsqrt2by2 = acos_abs_x,acos_const_sqrt2by2
fcmp.le.s1 p7,p8 = acos_abs_x,acos_const_sqrt2by2
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_tx8 = acos_tx4,acos_tx4,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_z = acos_l3,acos_T6,acos_z
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_series_t = acos_t11,acos_poly_p11,acos_poly_p0
nop.i 999
}
{ .mfi
nop.m 999
(p11) fma.s1 acos_const_add = acos_const_piby2, f1, acos_const_piby2
nop.i 999
}
;;
{ .mfi
nop.m 999
(p12) fma.s1 acos_const_add = f1,f0,f0
nop.i 999
}
;;
{ .mfi
nop.m 999
fma.s1 acos_1poly_p0 = acos_tx4,acos_1poly_p4,acos_1poly_p0
nop.i 999
}
{ .mfi
nop.m 999
fma.s1 acos_1poly_p11 = acos_tx4,acos_1poly_p15,acos_1poly_p11
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_tx11 = acos_tx8,acos_tx3,f0
nop.i 999;;
}
{ .mfi
nop.m 999
//(acos_pred_GTsqrt2by2) fnma.s1 answer2 = acos_z,acos_series_t,acos_const_piby2
(p8) fnma.s1 answer2 = acos_z,acos_series_t,f0
nop.i 999;;
}
{ .mfi
nop.m 999
fma.s1 acos_series_tx = acos_tx11,acos_1poly_p11,acos_1poly_p0
nop.i 999;;
}
{ .mfi
nop.m 999
//(acos_pred_GTsqrt2by2) fnma.d f8 = acos_sgn_x,answer2,acos_const_piby2
(p8) fnma.d f8 = acos_sgn_x,answer2,acos_const_add
nop.i 999;;
}
{ .mfb
nop.m 999
//(acos_pred_LEsqrt2by2) fnma.d f8 = f8,acos_series_tx,acos_const_piby2
(p7) fnma.d f8 = f8,acos_series_tx,acos_const_piby2
br.ret.sptk b0 ;;
}
L(ACOS_ZERO):
// Here if x=0
{ .mfb
nop.m 999
fma.d f8 = acos_const_piby2,f1,f0
br.ret.sptk b0 ;;
}
L(ACOS_ABS_ONE):
.pred.rel "mutex",p11,p12
// Here if |x|=1
{ .mfi
nop.m 999
(p11) fma.d f8 = acos_const_piby2,f1,acos_const_piby2 // acos(-1)=pi
nop.i 999
}
{ .mfb
nop.m 999
(p12) fma.d f8 = f1,f0,f0 // acos(1)=0
br.ret.sptk b0 ;;
}
.endp acos
ASM_SIZE_DIRECTIVE(acos)
.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
frcpa.s0 f9,p0 = f0,f0
;;
{ .mib
stfd [GR_Parameter_X] = f8 // 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,-16 // Store Parameter 3 on stack
adds r32 = 48,sp
br.call.sptk b0=__libm_error_support# // Call error handling function
};;
{ .mmi
ldfd f8 = [r32] // 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
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