1 # 2 # $NetBSD: fplsp.doc,v 1.1 2000/04/14 20:24:37 is Exp $ 3 # 4 5 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 6 # MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP 7 # M68000 Hi-Performance Microprocessor Division 8 # M68060 Software Package Production Release 9 # 10 # M68060 Software Package Copyright (C) 1993, 1994, 1995, 1996 Motorola Inc. 11 # All rights reserved. 12 # 13 # THE SOFTWARE is provided on an "AS IS" basis and without warranty. 14 # To the maximum extent permitted by applicable law, 15 # MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, 16 # INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS 17 # FOR A PARTICULAR PURPOSE and any warranty against infringement with 18 # regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) 19 # and any accompanying written materials. 20 # 21 # To the maximum extent permitted by applicable law, 22 # IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER 23 # (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, 24 # BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) 25 # ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE. 26 # 27 # Motorola assumes no responsibility for the maintenance and support 28 # of the SOFTWARE. 29 # 30 # You are hereby granted a copyright license to use, modify, and distribute the 31 # SOFTWARE so long as this entire notice is retained without alteration 32 # in any modified and/or redistributed versions, and that such modified 33 # versions are clearly identified as such. 34 # No licenses are granted by implication, estoppel or otherwise under any 35 # patents or trademarks of Motorola, Inc. 36 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 37 38 68060 FLOATING-POINT SOFTWARE PACKAGE (Library version) 39 -------------------------------------------------------- 40 41 The file fplsp.sa contains the "Library version" of the 42 68060SP Floating-Point Software Package. The routines 43 included in this module can be used to emulate the 44 FP instructions not implemented in 68060 hardware. These 45 instructions normally take exception vector #11 46 "FP Unimplemented Instruction". 47 48 By re-compiling a program that uses these instructions, and 49 making subroutine calls in place of the unimplemented 50 instructions, a program can avoid the overhead associated 51 with taking the exception. 52 53 Release file format: 54 -------------------- 55 The file fplsp.sa is essentially a hexadecimal image of the 56 release package. This is the ONLY format which will be supported. 57 The hex image was created by assembling the source code and 58 then converting the resulting binary output image into an 59 ASCII text file. The hexadecimal numbers are listed 60 using the Motorola Assembly Syntax assembler directive "dc.l" 61 (define constant longword). The file can be converted to other 62 assembly syntaxes by using any word processor with a global 63 search and replace function. 64 65 To assist in assembling and linking this module with other modules, 66 the installer should add a symbolic label to the top of the file. 67 This will allow calling routines to access the entry points 68 of this package. 69 70 The source code fplsp.s has also been included but only for 71 documentation purposes. 72 73 Release file structure: 74 ----------------------- 75 The file fplsp.sa contains an "Entry-Point" section and a 76 code section. The FPLSP has no "Call-Out" section. The first section 77 is the "Entry-Point" section. In order to access a function in the 78 package, a program must "bsr" or "jsr" to the location listed 79 below in "68060FPLSP entry points" that corresponds to the desired 80 function. A branch instruction located at the selected entry point 81 within the package will then enter the correct emulation code routine. 82 83 The entry point addresses at the beginning of the package will remain 84 fixed so that a program calling the routines will not have to be 85 re-compiled with every new 68060FPLSP release. 86 87 There are 3 entry-points for each instruction type: single precision, 88 double precision, and extended precision. 89 90 As an example, the "fsin" library instruction can be passed an 91 extended precision operand if program executes: 92 93 # fsin.x fp0 94 95 fmovm.x &0x01,-(%sp) # pass operand on stack 96 bsr.l _060FPLSP_TOP+0x1a8 # branch to fsin routine 97 add.l &0xc,%sp # clear operand from stack 98 99 Upon return, fp0 holds the correct result. The FPSR is 100 set correctly. The FPCR is unchanged. The FPIAR is undefined. 101 102 Another example. This time, a dyadic operation: 103 104 # frem.s %fp1,%fp0 105 106 fmov.s %fp1,-(%sp) # pass src operand 107 fmov.s %fp0,-(%sp) # pass dst operand 108 bsr.l _060FPLSP_TOP+0x168 # branch to frem routine 109 addq.l &0x8,%sp # clear operands from stack 110 111 Again, the result is returned in fp0. Note that BOTH operands 112 are passed in single precision format. 113 114 Exception reporting: 115 -------------------- 116 The package takes exceptions according to the FPCR value upon subroutine 117 entry. If an exception should be reported, then the package forces 118 this exception using implemented floating-point instructions. 119 For example, if the instruction being emulated should cause a 120 floating-point Operand Error exception, then the library routine 121 executes an FMUL of a zero and an infinity to force the OPERR 122 exception. Although the FPIAR will be undefined for the enabled 123 Operand Error exception handler, the user will at least be able 124 to record that the event occurred. 125 126 Miscellaneous: 127 -------------- 128 The package does not attempt to correctly emulate instructions 129 with Signalling NAN inputs. Use of SNANs should be avoided with 130 this package. 131 132 The fabs/fadd/fdiv/fint/fintrz/fmul/fneg/fsqrt/fsub entry points 133 are provided for the convenience of older compilers that make 134 subroutine calls for all fp instructions. The code does NOT emulate 135 the instruction but rather simply executes it. 136 137 68060FPLSP entry points: 138 ------------------------ 139 _060FPLSP_TOP: 140 0x000: _060LSP__facoss_ 141 0x008: _060LSP__facosd_ 142 0x010: _060LSP__facosx_ 143 0x018: _060LSP__fasins_ 144 0x020: _060LSP__fasind_ 145 0x028: _060LSP__fasinx_ 146 0x030: _060LSP__fatans_ 147 0x038: _060LSP__fatand_ 148 0x040: _060LSP__fatanx_ 149 0x048: _060LSP__fatanhs_ 150 0x050: _060LSP__fatanhd_ 151 0x058: _060LSP__fatanhx_ 152 0x060: _060LSP__fcoss_ 153 0x068: _060LSP__fcosd_ 154 0x070: _060LSP__fcosx_ 155 0x078: _060LSP__fcoshs_ 156 0x080: _060LSP__fcoshd_ 157 0x088: _060LSP__fcoshx_ 158 0x090: _060LSP__fetoxs_ 159 0x098: _060LSP__fetoxd_ 160 0x0a0: _060LSP__fetoxx_ 161 0x0a8: _060LSP__fetoxm1s_ 162 0x0b0: _060LSP__fetoxm1d_ 163 0x0b8: _060LSP__fetoxm1x_ 164 0x0c0: _060LSP__fgetexps_ 165 0x0c8: _060LSP__fgetexpd_ 166 0x0d0: _060LSP__fgetexpx_ 167 0x0d8: _060LSP__fgetmans_ 168 0x0e0: _060LSP__fgetmand_ 169 0x0e8: _060LSP__fgetmanx_ 170 0x0f0: _060LSP__flog10s_ 171 0x0f8: _060LSP__flog10d_ 172 0x100: _060LSP__flog10x_ 173 0x108: _060LSP__flog2s_ 174 0x110: _060LSP__flog2d_ 175 0x118: _060LSP__flog2x_ 176 0x120: _060LSP__flogns_ 177 0x128: _060LSP__flognd_ 178 0x130: _060LSP__flognx_ 179 0x138: _060LSP__flognp1s_ 180 0x140: _060LSP__flognp1d_ 181 0x148: _060LSP__flognp1x_ 182 0x150: _060LSP__fmods_ 183 0x158: _060LSP__fmodd_ 184 0x160: _060LSP__fmodx_ 185 0x168: _060LSP__frems_ 186 0x170: _060LSP__fremd_ 187 0x178: _060LSP__fremx_ 188 0x180: _060LSP__fscales_ 189 0x188: _060LSP__fscaled_ 190 0x190: _060LSP__fscalex_ 191 0x198: _060LSP__fsins_ 192 0x1a0: _060LSP__fsind_ 193 0x1a8: _060LSP__fsinx_ 194 0x1b0: _060LSP__fsincoss_ 195 0x1b8: _060LSP__fsincosd_ 196 0x1c0: _060LSP__fsincosx_ 197 0x1c8: _060LSP__fsinhs_ 198 0x1d0: _060LSP__fsinhd_ 199 0x1d8: _060LSP__fsinhx_ 200 0x1e0: _060LSP__ftans_ 201 0x1e8: _060LSP__ftand_ 202 0x1f0: _060LSP__ftanx_ 203 0x1f8: _060LSP__ftanhs_ 204 0x200: _060LSP__ftanhd_ 205 0x208: _060LSP__ftanhx_ 206 0x210: _060LSP__ftentoxs_ 207 0x218: _060LSP__ftentoxd_ 208 0x220: _060LSP__ftentoxx_ 209 0x228: _060LSP__ftwotoxs_ 210 0x230: _060LSP__ftwotoxd_ 211 0x238: _060LSP__ftwotoxx_ 212 213 0x240: _060LSP__fabss_ 214 0x248: _060LSP__fabsd_ 215 0x250: _060LSP__fabsx_ 216 0x258: _060LSP__fadds_ 217 0x260: _060LSP__faddd_ 218 0x268: _060LSP__faddx_ 219 0x270: _060LSP__fdivs_ 220 0x278: _060LSP__fdivd_ 221 0x280: _060LSP__fdivx_ 222 0x288: _060LSP__fints_ 223 0x290: _060LSP__fintd_ 224 0x298: _060LSP__fintx_ 225 0x2a0: _060LSP__fintrzs_ 226 0x2a8: _060LSP__fintrzd_ 227 0x2b0: _060LSP__fintrzx_ 228 0x2b8: _060LSP__fmuls_ 229 0x2c0: _060LSP__fmuld_ 230 0x2c8: _060LSP__fmulx_ 231 0x2d0: _060LSP__fnegs_ 232 0x2d8: _060LSP__fnegd_ 233 0x2e0: _060LSP__fnegx_ 234 0x2e8: _060LSP__fsqrts_ 235 0x2f0: _060LSP__fsqrtd_ 236 0x2f8: _060LSP__fsqrtx_ 237 0x300: _060LSP__fsubs_ 238 0x308: _060LSP__fsubd_ 239 0x310: _060LSP__fsubx_ 240
Indexes created Wed Oct 01 13:09:50 GMT 2025