|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |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. |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | fskeleton.s | | This file contains: | (1) example "Call-out"s | (2) example package entry code | (3) example "Call-out" table | #include |################################ | (1) EXAMPLE CALL-OUTS # | # | _060_fpsp_done() # | _060_real_ovfl() # | _060_real_unfl() # | _060_real_operr() # | _060_real_snan() # | _060_real_dz() # | _060_real_inex() # | _060_real_bsun() # | _060_real_fline() # | _060_real_fpu_disabled() # | _060_real_trap() # |################################ | | _060_fpsp_done(): | | This is the main exit point for the 68060 Floating-Point | Software Package. For a normal exit, all 060FPSP routines call this | routine. The operating system can do system dependent clean-up or | simply execute an "rte" as with the sample code below. | .global _060_fpsp_done _060_fpsp_done: bral _060_isp_done | do the same as isp_done | | _060_real_ovfl(): | | This is the exit point for the 060FPSP when an enabled overflow exception | is present. The routine below should point to the operating system handler | for enabled overflow conditions. The exception stack frame is an overflow | stack frame. The FP state frame holds the EXCEPTIONAL OPERAND. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_ovfl _060_real_ovfl: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_unfl(): | | This is the exit point for the 060FPSP when an enabled underflow exception | is present. The routine below should point to the operating system handler | for enabled underflow conditions. The exception stack frame is an underflow | stack frame. The FP state frame holds the EXCEPTIONAL OPERAND. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_unfl _060_real_unfl: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_operr(): | | This is the exit point for the 060FPSP when an enabled operand error exception | is present. The routine below should point to the operating system handler | for enabled operand error exceptions. The exception stack frame is an operand error | stack frame. The FP state frame holds the source operand of the faulting | instruction. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_operr _060_real_operr: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_snan(): | | This is the exit point for the 060FPSP when an enabled signalling NaN exception | is present. The routine below should point to the operating system handler | for enabled signalling NaN exceptions. The exception stack frame is a signalling NaN | stack frame. The FP state frame holds the source operand of the faulting | instruction. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_snan _060_real_snan: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_dz(): | | This is the exit point for the 060FPSP when an enabled divide-by-zero exception | is present. The routine below should point to the operating system handler | for enabled divide-by-zero exceptions. The exception stack frame is a divide-by-zero | stack frame. The FP state frame holds the source operand of the faulting | instruction. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_dz _060_real_dz: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_inex(): | | This is the exit point for the 060FPSP when an enabled inexact exception | is present. The routine below should point to the operating system handler | for enabled inexact exceptions. The exception stack frame is an inexact | stack frame. The FP state frame holds the source operand of the faulting | instruction. | | The sample routine below simply clears the exception status bit and | does an "rte". | .global _060_real_inex _060_real_inex: fsave -(%sp) move.w #0x6000,0x2(%sp) frestore (%sp)+ bral trap | jump to trap handler | | _060_real_bsun(): | | This is the exit point for the 060FPSP when an enabled bsun exception | is present. The routine below should point to the operating system handler | for enabled bsun exceptions. The exception stack frame is a bsun | stack frame. | | The sample routine below clears the exception status bit, clears the NaN | bit in the FPSR, and does an "rte". The instruction that caused the | bsun will now be re-executed but with the NaN FPSR bit cleared. | .global _060_real_bsun _060_real_bsun: | fsave -(%sp) fmove.l %fpsr,-(%sp) andi.b #0xfe,(%sp) fmove.l (%sp)+,%fpsr bral trap | jump to trap handler | | _060_real_fline(): | | This is the exit point for the 060FPSP when an F-Line Illegal exception is | encountered. Three different types of exceptions can enter the F-Line exception | vector number 11: FP Unimplemented Instructions, FP implemented instructions when | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module | _fpsp_fline() distinguishes between the three and acts appropriately. F-Line | Illegals branch here. | .global _060_real_fline _060_real_fline: bral trap | jump to trap handler | | _060_real_fpu_disabled(): | | This is the exit point for the 060FPSP when an FPU disabled exception is | encountered. Three different types of exceptions can enter the F-Line exception | vector number 11: FP Unimplemented Instructions, FP implemented instructions when | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module | _fpsp_fline() distinguishes between the three and acts appropriately. FPU disabled | exceptions branch here. | | The sample code below enables the FPU, sets the PC field in the exception stack | frame to the PC of the instruction causing the exception, and does an "rte". | The execution of the instruction then proceeds with an enabled floating-point | unit. | .global _060_real_fpu_disabled _060_real_fpu_disabled: move.l %d0,-(%sp) | enabled the fpu .long 0x4E7A0808 |movec pcr,%d0 bclr #0x1,%d0 .long 0x4E7B0808 |movec %d0,pcr move.l (%sp)+,%d0 move.l 0xc(%sp),0x2(%sp) | set "Current PC" rte | | _060_real_trap(): | | This is the exit point for the 060FPSP when an emulated "ftrapcc" instruction | discovers that the trap condition is true and it should branch to the operating | system handler for the trap exception vector number 7. | | The sample code below simply executes an "rte". | .global _060_real_trap _060_real_trap: bral trap | jump to trap handler |############################################################################ |################################# | (2) EXAMPLE PACKAGE ENTRY CODE # |################################# .global _060_fpsp_snan _060_fpsp_snan: bra.l _FP_CALL_TOP+0x80+0x00 .global _060_fpsp_operr _060_fpsp_operr: bra.l _FP_CALL_TOP+0x80+0x08 .global _060_fpsp_ovfl _060_fpsp_ovfl: bra.l _FP_CALL_TOP+0x80+0x10 .global _060_fpsp_unfl _060_fpsp_unfl: bra.l _FP_CALL_TOP+0x80+0x18 .global _060_fpsp_dz _060_fpsp_dz: bra.l _FP_CALL_TOP+0x80+0x20 .global _060_fpsp_inex _060_fpsp_inex: bra.l _FP_CALL_TOP+0x80+0x28 .global _060_fpsp_fline _060_fpsp_fline: bra.l _FP_CALL_TOP+0x80+0x30 .global _060_fpsp_unsupp _060_fpsp_unsupp: bra.l _FP_CALL_TOP+0x80+0x38 .global _060_fpsp_effadd _060_fpsp_effadd: bra.l _FP_CALL_TOP+0x80+0x40 |############################################################################ |############################### | (3) EXAMPLE CALL-OUT SECTION # |############################### | The size of this section MUST be 128 bytes!!! _FP_CALL_TOP: .long _060_real_bsun - _FP_CALL_TOP .long _060_real_snan - _FP_CALL_TOP .long _060_real_operr - _FP_CALL_TOP .long _060_real_ovfl - _FP_CALL_TOP .long _060_real_unfl - _FP_CALL_TOP .long _060_real_dz - _FP_CALL_TOP .long _060_real_inex - _FP_CALL_TOP .long _060_real_fline - _FP_CALL_TOP .long _060_real_fpu_disabled - _FP_CALL_TOP .long _060_real_trap - _FP_CALL_TOP .long _060_real_trace - _FP_CALL_TOP .long _060_real_access - _FP_CALL_TOP .long _060_fpsp_done - _FP_CALL_TOP .long 0x00000000, 0x00000000, 0x00000000 .long _060_imem_read - _FP_CALL_TOP .long _060_dmem_read - _FP_CALL_TOP .long _060_dmem_write - _FP_CALL_TOP .long _060_imem_read_word - _FP_CALL_TOP .long _060_imem_read_long - _FP_CALL_TOP .long _060_dmem_read_byte - _FP_CALL_TOP .long _060_dmem_read_word - _FP_CALL_TOP .long _060_dmem_read_long - _FP_CALL_TOP .long _060_dmem_write_byte - _FP_CALL_TOP .long _060_dmem_write_word - _FP_CALL_TOP .long _060_dmem_write_long - _FP_CALL_TOP .long 0x00000000 .long 0x00000000, 0x00000000, 0x00000000, 0x00000000 |############################################################################ | 060 FPSP KERNEL PACKAGE NEEDS TO GO HERE!!! #include "fpsp.sa"