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diff --git a/arch/m68k/ifpsp060/fplsp.doc b/arch/m68k/ifpsp060/fplsp.doc new file mode 100644 index 00000000000..fb637c43676 --- /dev/null +++ b/arch/m68k/ifpsp060/fplsp.doc @@ -0,0 +1,231 @@ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP +M68000 Hi-Performance Microprocessor Division +M68060 Software Package +Production Release P1.00 -- October 10, 1994 + +M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved. + +THE SOFTWARE is provided on an "AS IS" basis and without warranty. +To the maximum extent permitted by applicable law, +MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, +INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE +and any warranty against infringement with regard to the SOFTWARE +(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials. + +To the maximum extent permitted by applicable law, +IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER +(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, +BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) +ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE. +Motorola assumes no responsibility for the maintenance and support of the SOFTWARE. + +You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE +so long as this entire notice is retained without alteration in any modified and/or +redistributed versions, and that such modified versions are clearly identified as such. +No licenses are granted by implication, estoppel or otherwise under any patents +or trademarks of Motorola, Inc. +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +68060 FLOATING-POINT SOFTWARE PACKAGE (Library version) +-------------------------------------------------------- + +The file fplsp.sa contains the "Library version" of the +68060SP Floating-Point Software Package. The routines +included in this module can be used to emulate the +FP instructions not implemented in 68060 hardware. These +instructions normally take exception vector #11 +"FP Unimplemented Instruction". + +By re-compiling a program that uses these instructions, and +making subroutine calls in place of the unimplemented +instructions, a program can avoid the overhead associated +with taking the exception. + +Release file format: +-------------------- +The file fplsp.sa is essentially a hexadecimal image of the +release package. This is the ONLY format which will be supported. +The hex image was created by assembling the source code and +then converting the resulting binary output image into an +ASCII text file. The hexadecimal numbers are listed +using the Motorola Assembly Syntax assembler directive "dc.l" +(define constant longword). The file can be converted to other +assembly syntaxes by using any word processor with a global +search and replace function. + +To assist in assembling and linking this module with other modules, +the installer should add a symbolic label to the top of the file. +This will allow calling routines to access the entry points +of this package. + +The source code fplsp.s has also been included but only for +documentation purposes. + +Release file structure: +----------------------- +The file fplsp.sa contains an "Entry-Point" section and a +code section. The FPLSP has no "Call-Out" section. The first section +is the "Entry-Point" section. In order to access a function in the +package, a program must "bsr" or "jsr" to the location listed +below in "68060FPLSP entry points" that corresponds to the desired +function. A branch instruction located at the selected entry point +within the package will then enter the correct emulation code routine. + +The entry point addresses at the beginning of the package will remain +fixed so that a program calling the routines will not have to be +re-compiled with every new 68060FPLSP release. + +There are 3 entry-points for each instruction type: single precision, +double precision, and extended precision. + +As an example, the "fsin" library instruction can be passed an +extended precision operand if program executes: + +# fsin.x fp0 + + fmovm.x &0x01,-(%sp) # pass operand on stack + bsr.l _060FPLSP_TOP+0x1a8 # branch to fsin routine + add.l &0xc,%sp # clear operand from stack + +Upon return, fp0 holds the correct result. The FPSR is +set correctly. The FPCR is unchanged. The FPIAR is undefined. + +Another example. This time, a dyadic operation: + +# frem.s %fp1,%fp0 + + fmov.s %fp1,-(%sp) # pass src operand + fmov.s %fp0,-(%sp) # pass dst operand + bsr.l _060FPLSP_TOP+0x168 # branch to frem routine + addq.l &0x8,%sp # clear operands from stack + +Again, the result is returned in fp0. Note that BOTH operands +are passed in single precision format. + +Exception reporting: +-------------------- +The package takes exceptions according to the FPCR value upon subroutine +entry. If an exception should be reported, then the package forces +this exception using implemented floating-point instructions. +For example, if the instruction being emulated should cause a +floating-point Operand Error exception, then the library routine +executes an FMUL of a zero and an infinity to force the OPERR +exception. Although the FPIAR will be undefined for the enabled +Operand Error exception handler, the user will at least be able +to record that the event occurred. + +Miscellaneous: +-------------- +The package does not attempt to correctly emulate instructions +with Signalling NAN inputs. Use of SNANs should be avoided with +this package. + +The fabs/fadd/fdiv/fint/fintrz/fmul/fneg/fsqrt/fsub entry points +are provided for the convenience of older compilers that make +subroutine calls for all fp instructions. The code does NOT emulate +the instruction but rather simply executes it. + +68060FPLSP entry points: +------------------------ +_060FPLSP_TOP: +0x000: _060LSP__facoss_ +0x008: _060LSP__facosd_ +0x010: _060LSP__facosx_ +0x018: _060LSP__fasins_ +0x020: _060LSP__fasind_ +0x028: _060LSP__fasinx_ +0x030: _060LSP__fatans_ +0x038: _060LSP__fatand_ +0x040: _060LSP__fatanx_ +0x048: _060LSP__fatanhs_ +0x050: _060LSP__fatanhd_ +0x058: _060LSP__fatanhx_ +0x060: _060LSP__fcoss_ +0x068: _060LSP__fcosd_ +0x070: _060LSP__fcosx_ +0x078: _060LSP__fcoshs_ +0x080: _060LSP__fcoshd_ +0x088: _060LSP__fcoshx_ +0x090: _060LSP__fetoxs_ +0x098: _060LSP__fetoxd_ +0x0a0: _060LSP__fetoxx_ +0x0a8: _060LSP__fetoxm1s_ +0x0b0: _060LSP__fetoxm1d_ +0x0b8: _060LSP__fetoxm1x_ +0x0c0: _060LSP__fgetexps_ +0x0c8: _060LSP__fgetexpd_ +0x0d0: _060LSP__fgetexpx_ +0x0d8: _060LSP__fgetmans_ +0x0e0: _060LSP__fgetmand_ +0x0e8: _060LSP__fgetmanx_ +0x0f0: _060LSP__flog10s_ +0x0f8: _060LSP__flog10d_ +0x100: _060LSP__flog10x_ +0x108: _060LSP__flog2s_ +0x110: _060LSP__flog2d_ +0x118: _060LSP__flog2x_ +0x120: _060LSP__flogns_ +0x128: _060LSP__flognd_ +0x130: _060LSP__flognx_ +0x138: _060LSP__flognp1s_ +0x140: _060LSP__flognp1d_ +0x148: _060LSP__flognp1x_ +0x150: _060LSP__fmods_ +0x158: _060LSP__fmodd_ +0x160: _060LSP__fmodx_ +0x168: _060LSP__frems_ +0x170: _060LSP__fremd_ +0x178: _060LSP__fremx_ +0x180: _060LSP__fscales_ +0x188: _060LSP__fscaled_ +0x190: _060LSP__fscalex_ +0x198: _060LSP__fsins_ +0x1a0: _060LSP__fsind_ +0x1a8: _060LSP__fsinx_ +0x1b0: _060LSP__fsincoss_ +0x1b8: _060LSP__fsincosd_ +0x1c0: _060LSP__fsincosx_ +0x1c8: _060LSP__fsinhs_ +0x1d0: _060LSP__fsinhd_ +0x1d8: _060LSP__fsinhx_ +0x1e0: _060LSP__ftans_ +0x1e8: _060LSP__ftand_ +0x1f0: _060LSP__ftanx_ +0x1f8: _060LSP__ftanhs_ +0x200: _060LSP__ftanhd_ +0x208: _060LSP__ftanhx_ +0x210: _060LSP__ftentoxs_ +0x218: _060LSP__ftentoxd_ +0x220: _060LSP__ftentoxx_ +0x228: _060LSP__ftwotoxs_ +0x230: _060LSP__ftwotoxd_ +0x238: _060LSP__ftwotoxx_ + +0x240: _060LSP__fabss_ +0x248: _060LSP__fabsd_ +0x250: _060LSP__fabsx_ +0x258: _060LSP__fadds_ +0x260: _060LSP__faddd_ +0x268: _060LSP__faddx_ +0x270: _060LSP__fdivs_ +0x278: _060LSP__fdivd_ +0x280: _060LSP__fdivx_ +0x288: _060LSP__fints_ +0x290: _060LSP__fintd_ +0x298: _060LSP__fintx_ +0x2a0: _060LSP__fintrzs_ +0x2a8: _060LSP__fintrzd_ +0x2b0: _060LSP__fintrzx_ +0x2b8: _060LSP__fmuls_ +0x2c0: _060LSP__fmuld_ +0x2c8: _060LSP__fmulx_ +0x2d0: _060LSP__fnegs_ +0x2d8: _060LSP__fnegd_ +0x2e0: _060LSP__fnegx_ +0x2e8: _060LSP__fsqrts_ +0x2f0: _060LSP__fsqrtd_ +0x2f8: _060LSP__fsqrtx_ +0x300: _060LSP__fsubs_ +0x308: _060LSP__fsubd_ +0x310: _060LSP__fsubx_ |