232 lines
7.8 KiB
Plaintext
232 lines
7.8 KiB
Plaintext
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
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M68000 Hi-Performance Microprocessor Division
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M68060 Software Package
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Production Release P1.00 -- October 10, 1994
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M68060 Software Package Copyright <20> 1993, 1994 Motorola Inc. All rights reserved.
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THE SOFTWARE is provided on an "AS IS" basis and without warranty.
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To the maximum extent permitted by applicable law,
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MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
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INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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and any warranty against infringement with regard to the SOFTWARE
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(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
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To the maximum extent permitted by applicable law,
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IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
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(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
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BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
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ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
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Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
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You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
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so long as this entire notice is retained without alteration in any modified and/or
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redistributed versions, and that such modified versions are clearly identified as such.
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No licenses are granted by implication, estoppel or otherwise under any patents
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or trademarks of Motorola, Inc.
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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68060 FLOATING-POINT SOFTWARE PACKAGE (Library version)
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--------------------------------------------------------
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The file fplsp.sa contains the "Library version" of the
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68060SP Floating-Point Software Package. The routines
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included in this module can be used to emulate the
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FP instructions not implemented in 68060 hardware. These
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instructions normally take exception vector #11
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"FP Unimplemented Instruction".
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By re-compiling a program that uses these instructions, and
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making subroutine calls in place of the unimplemented
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instructions, a program can avoid the overhead associated
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with taking the exception.
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Release file format:
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--------------------
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The file fplsp.sa is essentially a hexadecimal image of the
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release package. This is the ONLY format which will be supported.
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The hex image was created by assembling the source code and
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then converting the resulting binary output image into an
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ASCII text file. The hexadecimal numbers are listed
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using the Motorola Assembly Syntax assembler directive "dc.l"
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(define constant longword). The file can be converted to other
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assembly syntaxes by using any word processor with a global
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search and replace function.
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To assist in assembling and linking this module with other modules,
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the installer should add a symbolic label to the top of the file.
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This will allow calling routines to access the entry points
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of this package.
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The source code fplsp.s has also been included but only for
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documentation purposes.
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Release file structure:
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-----------------------
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The file fplsp.sa contains an "Entry-Point" section and a
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code section. The FPLSP has no "Call-Out" section. The first section
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is the "Entry-Point" section. In order to access a function in the
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package, a program must "bsr" or "jsr" to the location listed
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below in "68060FPLSP entry points" that corresponds to the desired
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function. A branch instruction located at the selected entry point
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within the package will then enter the correct emulation code routine.
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The entry point addresses at the beginning of the package will remain
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fixed so that a program calling the routines will not have to be
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re-compiled with every new 68060FPLSP release.
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There are 3 entry-points for each instruction type: single precision,
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double precision, and extended precision.
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As an example, the "fsin" library instruction can be passed an
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extended precision operand if program executes:
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# fsin.x fp0
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fmovm.x &0x01,-(%sp) # pass operand on stack
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bsr.l _060FPLSP_TOP+0x1a8 # branch to fsin routine
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add.l &0xc,%sp # clear operand from stack
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Upon return, fp0 holds the correct result. The FPSR is
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set correctly. The FPCR is unchanged. The FPIAR is undefined.
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Another example. This time, a dyadic operation:
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# frem.s %fp1,%fp0
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fmov.s %fp1,-(%sp) # pass src operand
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fmov.s %fp0,-(%sp) # pass dst operand
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bsr.l _060FPLSP_TOP+0x168 # branch to frem routine
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addq.l &0x8,%sp # clear operands from stack
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Again, the result is returned in fp0. Note that BOTH operands
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are passed in single precision format.
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Exception reporting:
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--------------------
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The package takes exceptions according to the FPCR value upon subroutine
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entry. If an exception should be reported, then the package forces
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this exception using implemented floating-point instructions.
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For example, if the instruction being emulated should cause a
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floating-point Operand Error exception, then the library routine
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executes an FMUL of a zero and an infinity to force the OPERR
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exception. Although the FPIAR will be undefined for the enabled
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Operand Error exception handler, the user will at least be able
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to record that the event occurred.
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Miscellaneous:
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--------------
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The package does not attempt to correctly emulate instructions
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with Signalling NAN inputs. Use of SNANs should be avoided with
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this package.
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The fabs/fadd/fdiv/fint/fintrz/fmul/fneg/fsqrt/fsub entry points
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are provided for the convenience of older compilers that make
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subroutine calls for all fp instructions. The code does NOT emulate
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the instruction but rather simply executes it.
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68060FPLSP entry points:
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------------------------
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_060FPLSP_TOP:
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0x000: _060LSP__facoss_
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0x008: _060LSP__facosd_
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0x010: _060LSP__facosx_
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0x018: _060LSP__fasins_
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0x020: _060LSP__fasind_
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0x028: _060LSP__fasinx_
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0x030: _060LSP__fatans_
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0x038: _060LSP__fatand_
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0x040: _060LSP__fatanx_
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0x048: _060LSP__fatanhs_
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0x050: _060LSP__fatanhd_
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0x058: _060LSP__fatanhx_
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0x060: _060LSP__fcoss_
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0x068: _060LSP__fcosd_
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0x070: _060LSP__fcosx_
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0x078: _060LSP__fcoshs_
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0x080: _060LSP__fcoshd_
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0x088: _060LSP__fcoshx_
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0x090: _060LSP__fetoxs_
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0x098: _060LSP__fetoxd_
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0x0a0: _060LSP__fetoxx_
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0x0a8: _060LSP__fetoxm1s_
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0x0b0: _060LSP__fetoxm1d_
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0x0b8: _060LSP__fetoxm1x_
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0x0c0: _060LSP__fgetexps_
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0x0c8: _060LSP__fgetexpd_
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0x0d0: _060LSP__fgetexpx_
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0x0d8: _060LSP__fgetmans_
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0x0e0: _060LSP__fgetmand_
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0x0e8: _060LSP__fgetmanx_
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0x0f0: _060LSP__flog10s_
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0x0f8: _060LSP__flog10d_
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0x100: _060LSP__flog10x_
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0x108: _060LSP__flog2s_
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0x110: _060LSP__flog2d_
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0x118: _060LSP__flog2x_
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0x120: _060LSP__flogns_
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0x128: _060LSP__flognd_
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0x130: _060LSP__flognx_
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0x138: _060LSP__flognp1s_
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0x140: _060LSP__flognp1d_
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0x148: _060LSP__flognp1x_
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0x150: _060LSP__fmods_
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0x158: _060LSP__fmodd_
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0x160: _060LSP__fmodx_
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0x168: _060LSP__frems_
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0x170: _060LSP__fremd_
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0x178: _060LSP__fremx_
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0x180: _060LSP__fscales_
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0x188: _060LSP__fscaled_
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0x190: _060LSP__fscalex_
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0x198: _060LSP__fsins_
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0x1a0: _060LSP__fsind_
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0x1a8: _060LSP__fsinx_
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0x1b0: _060LSP__fsincoss_
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0x1b8: _060LSP__fsincosd_
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0x1c0: _060LSP__fsincosx_
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0x1c8: _060LSP__fsinhs_
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0x1d0: _060LSP__fsinhd_
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0x1d8: _060LSP__fsinhx_
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0x1e0: _060LSP__ftans_
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0x1e8: _060LSP__ftand_
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0x1f0: _060LSP__ftanx_
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0x1f8: _060LSP__ftanhs_
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0x200: _060LSP__ftanhd_
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0x208: _060LSP__ftanhx_
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0x210: _060LSP__ftentoxs_
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0x218: _060LSP__ftentoxd_
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0x220: _060LSP__ftentoxx_
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0x228: _060LSP__ftwotoxs_
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0x230: _060LSP__ftwotoxd_
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0x238: _060LSP__ftwotoxx_
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0x240: _060LSP__fabss_
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0x248: _060LSP__fabsd_
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0x250: _060LSP__fabsx_
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0x258: _060LSP__fadds_
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0x260: _060LSP__faddd_
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0x268: _060LSP__faddx_
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0x270: _060LSP__fdivs_
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0x278: _060LSP__fdivd_
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0x280: _060LSP__fdivx_
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0x288: _060LSP__fints_
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0x290: _060LSP__fintd_
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0x298: _060LSP__fintx_
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0x2a0: _060LSP__fintrzs_
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0x2a8: _060LSP__fintrzd_
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0x2b0: _060LSP__fintrzx_
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0x2b8: _060LSP__fmuls_
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0x2c0: _060LSP__fmuld_
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0x2c8: _060LSP__fmulx_
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0x2d0: _060LSP__fnegs_
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0x2d8: _060LSP__fnegd_
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0x2e0: _060LSP__fnegx_
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0x2e8: _060LSP__fsqrts_
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0x2f0: _060LSP__fsqrtd_
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0x2f8: _060LSP__fsqrtx_
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0x300: _060LSP__fsubs_
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0x308: _060LSP__fsubd_
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0x310: _060LSP__fsubx_
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