919 lines
26 KiB
ArmAsm
919 lines
26 KiB
ArmAsm
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.file "atan2f.s"
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// Copyright (c) 2000, Intel Corporation
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// All rights reserved.
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//
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// Contributed 6/1/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story,
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// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation.
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//
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// WARRANTY DISCLAIMER
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Intel Corporation is the author of this code, and requests that all
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// problem reports or change requests be submitted to it directly at
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// http://developer.intel.com/opensource.
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// History
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//==============================================================
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// ?/??/00 Initial version
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// 8/15/00 Bundle added after call to __libm_error_support to properly
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// set [the previously overwritten] GR_Parameter_RESULT.
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// 8/17/00 Changed predicate register macro-usage to direct predicate
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// names due to an assembler bug.
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// Description
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//=========================================
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// The atan2 function computes the principle value of the arc tangent of y/x using
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// the signs of both arguments to determine the quadrant of the return value.
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// A domain error may occur if both arguments are zero.
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// The atan2 function returns the arc tangent of y/x in the range [-pi,+pi] radians.
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// Special values
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//==============================================================
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// Y x Result
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// +number +inf +0
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// -number +inf -0
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// +number -inf +pi
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// -number -inf -pi
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//
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// +inf +number +pi/2
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// -inf +number -pi/2
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// +inf -number +pi/2
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// -inf -number -pi/2
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//
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// +inf +inf +pi/4
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// -inf +inf -pi/4
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// +inf -inf +3pi/4
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// -inf -inf -3pi/4
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//
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// +1 +1 +pi/4
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// -1 +1 -pi/4
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// +1 -1 +3pi/4
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// -1 -1 -3pi/4
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//
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// +number +0 +pi/2 // does not raise DBZ
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// -number +0 -pi/2 // does not raise DBZ
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// +number -0 +pi/2 // does not raise DBZ
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// -number -0 -pi/2 // does not raise DBZ
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//
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// +0 +number +0
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// -0 +number -0
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// +0 -number +pi
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// -0 -number -pi
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//
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// +0 +0 +0 // does not raise invalid
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// -0 +0 -0 // does not raise invalid
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// +0 -0 +pi // does not raise invalid
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// -0 -0 -pi // does not raise invalid
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//
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// Nan anything quiet Y
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// anything NaN quiet X
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// atan(+-0/+-0) sets double error tag to 37
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// atan(+-0/+-0) sets single error tag to 38
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// These are domain errors.
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//
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// Assembly macros
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//=========================================
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// integer registers
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atan2f_GR_Addr_1 = r33
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atan2f_GR_Addr_2 = r34
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GR_SAVE_B0 = r35
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GR_SAVE_PFS = r36
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GR_SAVE_GP = r37
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GR_Parameter_X = r38
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GR_Parameter_Y = r39
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GR_Parameter_RESULT = r40
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GR_Parameter_TAG = r41
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// floating point registers
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atan2f_coef_p1 = f32
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atan2f_coef_p7 = f33
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atan2f_coef_p8 = f34
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atan2f_coef_p3 = f35
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atan2f_coef_p4 = f36
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atan2f_coef_p9 = f37
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atan2f_coef_p10 = f38
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atan2f_coef_p2 = f39
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atan2f_coef_p5 = f40
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atan2f_coef_p6 = f41
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atan2f_const_1 = f43
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atan2f_const_pi = f44
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atan2f_abs_Y = f45
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atan2f_abs_X = f46
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atan2f_sgn_Y = f47
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atan2f_sgn_X = f48
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atan2f_A = f49
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atan2f_Asq = f50
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atan2f_Acub = f51
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atan2f_A4 = f52
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atan2f_A5 = f53
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atan2f_A6 = f54
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atan2f_A11 = f55
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atan2f_poly_A1 = f56
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atan2f_poly_A2 = f57
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atan2f_poly_A3 = f58
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atan2f_poly_A4 = f59
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atan2f_poly_A5 = f60
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atan2f_poly_atan_A = f61
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atan2f_answer = f62
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atan2f_C = f63
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atan2f_G_numer = f64
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atan2f_G_denom = f65
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atan2f_H1 = f66
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atan2f_H_beta = f67
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atan2f_H2 = f68
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atan2f_H_beta2 = f69
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atan2f_H3 = f70
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atan2f_g = f71
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atan2f_gsq = f72
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atan2f_poly_atan_G = f73
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atan2f_Z = f74
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atan2f_Zsq = f75
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atan2f_Zcub = f76
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atan2f_Z4 = f77
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atan2f_Z5 = f78
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atan2f_Z6 = f79
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atan2f_Z11 = f80
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atan2f_poly_Z1 = f81
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atan2f_poly_Z2 = f82
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atan2f_poly_Z3 = f83
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atan2f_poly_Z4 = f84
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atan2f_poly_Z5 = f85
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atan2f_T_numer = f86
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atan2f_T_denom = f87
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atan2f_S1 = f88
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atan2f_S_beta = f89
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atan2f_S2 = f90
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atan2f_S_beta2 = f91
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atan2f_S3 = f92
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atan2f_t = f93
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atan2f_tsq = f94
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atan2f_poly_atan_T = f95
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atan2f_poly_atan_Z = f96
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atan2f_const_piby4 = f97
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atan2f_const_3piby4 = f98
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atan2f_const_piby2 = f99
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// predicate registers
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//atan2f_Pred_Swap = p6
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//atan2f_Pred_noSwap = p7
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//atan2f_Pred_Xpos = p8
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//atan2f_Pred_Xneg = p9
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.data
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.align 16
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atan2f_coef_table1:
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data8 0xBFD5555512191621 // p1
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data8 0xBFA6E10BA401393F // p7
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data8 0x3FBC4F512B1865F5 // p4
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data8 0xBF7DEAADAA336451 // p9
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data8 0xBFB68EED6A8CFA32 // p5
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data8 0x3FB142A73D7C54E3 // p6
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data8 0x3fe921fb54442d18 // pi/4
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data8 0x4002d97c7f3321d2 // 3pi/4
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atan2f_coef_table2:
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data8 0x3F97105B4160F86B // p8
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data8 0xBFC2473C5145EE38 // p3
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data8 0x3F522E5D33BC9BAA // p10
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data8 0x3FC9997E7AFBFF4E // p2
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data8 0x3ff921fb54442d18 // pi/2
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data8 0x400921fb54442d18 // pi
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.global atan2f
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.text
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.proc atan2f
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.align 32
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atan2f:
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{ .mfi
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alloc r32 = ar.pfs,1,5,4,0
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frcpa.s1 atan2f_Z,p0 = f1,f8
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addl atan2f_GR_Addr_2 = @ltoff(atan2f_coef_table2),gp
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}
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{ .mfi
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addl atan2f_GR_Addr_1 = @ltoff(atan2f_coef_table1),gp
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nop.f 999
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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frcpa.s1 atan2f_A,p0 = f1,f9
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nop.i 999;;
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}
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{ .mfi
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ld8 atan2f_GR_Addr_1 = [atan2f_GR_Addr_1]
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fmerge.s atan2f_sgn_X = f9,f1
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nop.i 999
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}
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{ .mfi
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ld8 atan2f_GR_Addr_2 = [atan2f_GR_Addr_2]
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nop.f 999
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fmerge.s atan2f_sgn_Y = f8,f1
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fmerge.s atan2f_abs_X = f0,f9
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nop.i 999;;
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}
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{ .mfi
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ldfpd atan2f_coef_p1,atan2f_coef_p7 = [atan2f_GR_Addr_1],16
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fmerge.s atan2f_abs_Y = f0,f8
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nop.i 999
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}
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{ .mfi
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ldfpd atan2f_coef_p8,atan2f_coef_p3 = [atan2f_GR_Addr_2],16
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fma.s1 atan2f_Z = atan2f_Z,f9,f0
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nop.i 999;;
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}
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{ .mfi
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ldfpd atan2f_coef_p4,atan2f_coef_p9 = [atan2f_GR_Addr_1],16
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fclass.m p10,p0 = f9,0xe7 // @inf|@snan|@qnan|@zero
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nop.i 999
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}
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{ .mfi
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ldfpd atan2f_coef_p10,atan2f_coef_p2 = [atan2f_GR_Addr_2],16
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fma.s1 atan2f_A = atan2f_A,f8,f0
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nop.i 999;;
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}
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{ .mfi
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ldfpd atan2f_const_piby2,atan2f_const_pi = [atan2f_GR_Addr_2]
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// fcmp.ge.s1 atan2f_Pred_Xpos,atan2f_Pred_Xneg = atan2f_sgn_X,f1
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fcmp.ge.s1 p8,p9 = atan2f_sgn_X,f1
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nop.i 999
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}
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{ .mfi
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ldfpd atan2f_coef_p5,atan2f_coef_p6 = [atan2f_GR_Addr_1],16
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nop.f 999
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nop.i 999;;
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}
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{ .mfi
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ldfpd atan2f_const_piby4,atan2f_const_3piby4 = [atan2f_GR_Addr_1]
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fclass.m p11,p0 = f8,0xe7 // @inf|@snan|@qnan|@zero
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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//(atan2f_Pred_Xpos) fma.s1 atan2f_const_1 = atan2f_sgn_Y,f0,f0
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(p8) fma.s1 atan2f_const_1 = atan2f_sgn_Y,f0,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
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//(atan2f_Pred_Xneg) fma.s1 atan2f_const_1 = atan2f_sgn_Y,f1,f0
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(p9) fma.s1 atan2f_const_1 = atan2f_sgn_Y,f1,f0
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nop.i 999;;
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}
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{ .mfb
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nop.m 999
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fma.s1 atan2f_Zsq = atan2f_Z,atan2f_Z,f0
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(p10) br.cond.spnt ATAN2F_XY_INF_NAN_ZERO
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}
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{ .mfb
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nop.m 999
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fma.s1 atan2f_T_denom = atan2f_Z,f9,f8
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(p11) br.cond.spnt ATAN2F_XY_INF_NAN_ZERO
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}
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;;
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{ .mfi
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nop.m 999
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fma.s1 atan2f_Asq = atan2f_A,atan2f_A,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_G_denom = atan2f_A,f8,f9
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fnma.s1 atan2f_G_numer = atan2f_A,f9,f8
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fnma.s1 atan2f_T_numer = atan2f_Z,f8,f9
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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// fcmp.gt.s1 atan2f_Pred_Swap,atan2f_Pred_noSwap = atan2f_abs_Y,atan2f_abs_X
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fcmp.gt.s1 p6,p7 = atan2f_abs_Y,atan2f_abs_X
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_A4 = atan2f_A,atan2f_coef_p1,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z4 = atan2f_Z,atan2f_coef_p1,f0
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z2 = atan2f_Zsq,atan2f_coef_p8,atan2f_coef_p7
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z5 = atan2f_Zsq,atan2f_coef_p4,atan2f_coef_p3
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_Z4 = atan2f_Zsq,atan2f_Zsq,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z1 = atan2f_Zsq,atan2f_coef_p10,atan2f_coef_p9
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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frcpa.s1 atan2f_S1,p0 = f1,atan2f_T_denom
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_Zcub = atan2f_Z,atan2f_Zsq,f0
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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frcpa.s1 atan2f_H1,p0 = f1,atan2f_G_denom
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_A5 = atan2f_Asq,atan2f_coef_p4,atan2f_coef_p3
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_A1 = atan2f_Asq,atan2f_coef_p10,atan2f_coef_p9
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_A2 = atan2f_Asq,atan2f_coef_p8,atan2f_coef_p7
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_Acub = atan2f_A,atan2f_Asq,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_A4 = atan2f_Asq,atan2f_Asq,f0
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z4 = atan2f_Zsq,atan2f_poly_Z4,atan2f_Z
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z5 = atan2f_Zsq,atan2f_poly_Z5,atan2f_coef_p2
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fnma.s1 atan2f_S_beta = atan2f_S1,atan2f_T_denom,f1
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_t = atan2f_S1,atan2f_T_numer,f0
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z3 = atan2f_Zsq,atan2f_coef_p6,atan2f_coef_p5
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nop.i 999
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_poly_Z1 = atan2f_Z4,atan2f_poly_Z1,atan2f_poly_Z2
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nop.i 999;;
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}
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{ .mfi
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nop.m 999
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fma.s1 atan2f_Z5 = atan2f_Zsq,atan2f_Zcub,f0
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nop.i 999
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}
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{ .mfi
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nop.m 999
|
|
fma.s1 atan2f_Z6 = atan2f_Zsq,atan2f_Z4,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fnma.s1 atan2f_H_beta = atan2f_H1,atan2f_G_denom,f1
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_g = atan2f_H1,atan2f_G_numer,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A4 = atan2f_Asq,atan2f_poly_A4,atan2f_A
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A5 = atan2f_Asq,atan2f_poly_A5,atan2f_coef_p2
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A3 = atan2f_Asq,atan2f_coef_p6,atan2f_coef_p5
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A1 = atan2f_A4,atan2f_poly_A1,atan2f_poly_A2
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_A5 = atan2f_Asq,atan2f_Acub,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_A6 = atan2f_Asq,atan2f_A4,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_tsq = atan2f_t,atan2f_t,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_T = atan2f_t,atan2f_coef_p1,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_S2 = atan2f_S1,atan2f_S_beta,atan2f_S1
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_S_beta2 = atan2f_S_beta,atan2f_S_beta,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_Z1 = atan2f_Z4,atan2f_poly_Z1,atan2f_poly_Z3
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_Z4 = atan2f_Z5,atan2f_poly_Z5,atan2f_poly_Z4
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_G = atan2f_g,atan2f_coef_p1,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_Z11 = atan2f_Z5,atan2f_Z6,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_H_beta2 = atan2f_H_beta,atan2f_H_beta,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_gsq = atan2f_g,atan2f_g,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A4 = atan2f_A5,atan2f_poly_A5,atan2f_poly_A4
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_H2 = atan2f_H1,atan2f_H_beta,atan2f_H1
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_A11 = atan2f_A5,atan2f_A6,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_A1 = atan2f_A4,atan2f_poly_A1,atan2f_poly_A3
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_S3 = atan2f_S2,atan2f_S_beta2,atan2f_S2
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_T = atan2f_tsq,atan2f_poly_atan_T,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
//(atan2f_Pred_Swap) fma.s1 atan2f_C = atan2f_sgn_Y,atan2f_const_piby2,f0
|
|
(p6) fma.s1 atan2f_C = atan2f_sgn_Y,atan2f_const_piby2,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_Z = atan2f_Z11,atan2f_poly_Z1,atan2f_poly_Z4
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
//(atan2f_Pred_noSwap) fma.s1 atan2f_C = atan2f_const_1,atan2f_const_pi,f0
|
|
(p7) fma.s1 atan2f_C = atan2f_const_1,atan2f_const_pi,f0
|
|
nop.i 999
|
|
}
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_G = atan2f_gsq,atan2f_poly_atan_G,f0
|
|
nop.i 999;;
|
|
}
|
|
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_H3 = atan2f_H2,atan2f_H_beta2,atan2f_H2
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_A = atan2f_A11,atan2f_poly_A1,atan2f_poly_A4
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_T = atan2f_T_numer,atan2f_S3,atan2f_poly_atan_T
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
//(atan2f_Pred_Swap) fms.s1 atan2f_answer = f1,atan2f_C,atan2f_poly_atan_Z
|
|
(p6) fms.s1 atan2f_answer = f1,atan2f_C,atan2f_poly_atan_Z
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
fma.s1 atan2f_poly_atan_G = atan2f_G_numer,atan2f_H3,atan2f_poly_atan_G
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
//(atan2f_Pred_noSwap) fma.s1 atan2f_answer = f1,atan2f_C,atan2f_poly_atan_A
|
|
(p7) fma.s1 atan2f_answer = f1,atan2f_C,atan2f_poly_atan_A
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfi
|
|
nop.m 999
|
|
//(atan2f_Pred_Swap) fms.s f8 = f1,atan2f_answer,atan2f_poly_atan_T
|
|
(p6) fms.s f8 = f1,atan2f_answer,atan2f_poly_atan_T
|
|
nop.i 999;;
|
|
}
|
|
|
|
{ .mfb
|
|
nop.m 999
|
|
//(atan2f_Pred_noSwap) fma.s f8 = f1,atan2f_answer,atan2f_poly_atan_G
|
|
(p7) fma.s f8 = f1,atan2f_answer,atan2f_poly_atan_G
|
|
br.ret.sptk b0
|
|
}
|
|
|
|
|
|
ATAN2F_XY_INF_NAN_ZERO:
|
|
// p10 = (y is NAN)
|
|
// answer is quiet y
|
|
|
|
// p11 = (y is not NAN)
|
|
// p12 = (X is NAN)
|
|
// answer is quiet x
|
|
|
|
fclass.m p10,p11 = f8,0xc3 // @snan | @qnan
|
|
;;
|
|
(p10) fnorm.s f10 = f9
|
|
(p10) fnorm.s f8 = f8
|
|
(p10) br.ret.spnt b0
|
|
|
|
(p11) fclass.m p12,p0 = f9,0xc3 // @snan | @qnan
|
|
;;
|
|
(p12) fnorm.s f8 = f9
|
|
(p12) br.ret.spnt b0
|
|
|
|
// p10 = x is +inf
|
|
// p12 = (x is +inf) AND (y is +- inf)
|
|
// answer is (sign of y)pi/4
|
|
// p13 = (x is +inf) AND (y is +- number)
|
|
// answer is (sign of y)0
|
|
|
|
|
|
|
|
fclass.m p10,p0 = f9,0x21 // @inf| @pos
|
|
;;
|
|
|
|
(p10) fclass.m.unc p12,p13 = f8,0x23 // @inf
|
|
;;
|
|
|
|
(p12) fma.s f8 = atan2f_sgn_Y, atan2f_const_piby4,f0
|
|
(p12) br.ret.spnt b0
|
|
|
|
;;
|
|
(p13) fmerge.s f8 = f8,f0
|
|
(p13) br.ret.spnt b0
|
|
|
|
|
|
// p11 = x is -inf
|
|
// p14 = (x is -inf) AND (y is +- inf)
|
|
// amswer is (sign of y)3pi/4
|
|
// p15 = (x is -inf) AND (y is +- number)
|
|
// answer is (sign of y)pi
|
|
|
|
// p12 = x is +- number
|
|
// p13 = (x is +- number) AND (y is +- inf)
|
|
// answer is (sign of y)pi/2
|
|
|
|
|
|
|
|
fclass.m.unc p11,p12 = f9,0x22 // @inf | @neg
|
|
;;
|
|
|
|
(p11) fclass.m.unc p14,p15 = f8,0x23 // @inf
|
|
;;
|
|
(p14) fma.s f8 = atan2f_sgn_Y, atan2f_const_3piby4,f0
|
|
(p14) br.ret.spnt b0
|
|
|
|
(p15) fma.s f8 = atan2f_sgn_Y, atan2f_const_pi,f0
|
|
(p15) br.ret.spnt b0
|
|
|
|
(p12) fclass.m.unc p13,p0 = f8,0x23 // @inf
|
|
;;
|
|
|
|
(p13) fma.s f8 = atan2f_sgn_Y, atan2f_const_piby2,f0
|
|
(p13) br.ret.spnt b0
|
|
|
|
// p10 = (x is +-0)
|
|
// p13 = (x is +-0) AND (y is +-number)
|
|
// answer is (sign of y) pi/2
|
|
// p12 = (x is +-0) AND (y is +-0)
|
|
// answer is goto error_region
|
|
|
|
|
|
// p11 = (x is +- number)
|
|
// p12 = (x is +- number) AND (y is +- 0)
|
|
// p13 = (x is + number) AND (y is +- 0)
|
|
// answer is (sign of y)0
|
|
// p14 = NOT (x is + number) AND (y is +- 0)
|
|
// p15 = (x is - number) AND (y is +- 0)
|
|
// answer is (sign of y)pi
|
|
|
|
|
|
fclass.m p10,p11 = f9,0x7 // @zero
|
|
;;
|
|
|
|
(p10) fclass.m.unc p12,p13 = f8,0x7 // @zero
|
|
;;
|
|
|
|
(p13) fma.s f8 = atan2f_sgn_Y, atan2f_const_piby2,f0
|
|
(p13) br.ret.spnt b0
|
|
|
|
(p12) br.cond.spnt __libm_error_region
|
|
;;
|
|
|
|
(p11) fclass.m.unc p12,p0 = f8,0x7 // @zero
|
|
;;
|
|
|
|
(p12) fclass.m.unc p13, p14 = f9,0x19 // @norm| @unorm | @pos
|
|
;;
|
|
|
|
(p13) fmerge.s f8 = f8, f0
|
|
(p13) br.ret.spnt b0
|
|
|
|
(p14) fclass.m.unc p15, p0 = f9,0x1a // @norm| @unorm | @neg
|
|
;;
|
|
|
|
(p15) fma.s f8 = atan2f_sgn_Y, atan2f_const_pi,f0
|
|
(p15) br.ret.spnt b0
|
|
|
|
|
|
.endp atan2f
|
|
|
|
.proc __libm_error_region
|
|
__libm_error_region:
|
|
.prologue
|
|
mov GR_Parameter_TAG = 38
|
|
fclass.m p10,p11 = f9,0x5 // @zero | @pos
|
|
;;
|
|
(p10) fmerge.s f10 = f8, f0
|
|
(p11) fma.s f10 = atan2f_sgn_Y, atan2f_const_pi,f0
|
|
;;
|
|
|
|
{ .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] = 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] = 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] = f10 // 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
|
|
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
|
|
|
|
.type __libm_error_support#,@function
|
|
.global __libm_error_support#
|