4 // Copyright (c) 2001 - 2003, Intel Corporation
5 // All rights reserved.
7 // Contributed 2001 by the Intel Numerics Group, Intel Corporation
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21 // products derived from this software without specific prior written
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41 //==============================================================
42 // 05/31/01 Initial version
43 // 05/20/02 Cleaned up namespace and sf0 syntax
44 // 02/10/03 Reordered header: .section, .global, .proc, .align
47 //==============================================================
48 // float fmaxf (float x, float y)
50 // Overview of operation
51 //==============================================================
52 // returns the algebraic maximum of 2 input values
55 // fmaxf(x, nan) returns x if x is numeric // Must special case this one
56 // fmaxf(nan, y) returns y if y is numeric
57 // fmaxf(nan1, nan2) returns quietized nan2
58 // fmaxf(+0,+0) returns +0
59 // fmaxf(-0,+0) returns +0
60 // fmaxf(-0,-0) returns -0
61 // fmaxf(+0,-0) returns +0 // Must special case this one
63 // SNaN causes invalid to be set
65 // floating-point registers used: 2
66 // f8, input x, output
70 GLOBAL_LIBM_ENTRY(fmaxf)
74 fcmp.unord.s0 p6,p7 = f8, f9 // Is x or y a nan? Raise invalid or denormal
81 (p7) fclass.m.unc p8,p9 = f9, 0x06 // If no nan, is y=-0?
88 (p6) fclass.m.unc p10,p0 = f8, 0xc3 // Is x nan?
95 (p9) fmax.s0 f8 = f8, f9 // Normal case, no nan and y not -0
102 (p8) fmax.s0 f8 = f9, f8 // No nan and y -0
109 (p10) fmerge.s f8 = f9, f9 // If x nan, return y, else do nothing (returns x)
114 GLOBAL_LIBM_END(fmaxf)