m68k/ifpsp060/fskeleton.S

3 |M68000 Hi-Performance Microprocessor Division
5 |Production Release P1.00 -- October 10, 1994
10 |To the maximum extent permitted by applicable law,
13 |and any warranty against infringement with regard to the SOFTWARE
16 |To the maximum extent permitted by applicable law,
20 |ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
23 |You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
32 |	(1) example "Call-out"s
34 |	(3) example "Call-out" table
40 | (1) EXAMPLE CALL-OUTS		#
58 | This is the main exit point for the 68060 Floating-Point
60 | routine. The operating system can do system dependent clean-up or
70 | This is the exit point for the 060FPSP when an enabled overflow exception
71 | is present. The routine below should point to the operating system handler
80 	fsave		-(%sp)
83 	bral		trap	| jump to trap handler
89 | This is the exit point for the 060FPSP when an enabled underflow exception
90 | is present. The routine below should point to the operating system handler
99 	fsave		-(%sp)
102 	bral		trap	| jump to trap handler
107 | This is the exit point for the 060FPSP when an enabled operand error exception
108 | is present. The routine below should point to the operating system handler
118 	fsave		-(%sp)
121 	bral		trap	| jump to trap handler
126 | This is the exit point for the 060FPSP when an enabled signalling NaN exception
127 | is present. The routine below should point to the operating system handler
137 	fsave		-(%sp)
140 	bral		trap	| jump to trap handler
145 | This is the exit point for the 060FPSP when an enabled divide-by-zero exception
146 | is present. The routine below should point to the operating system handler
147 | for enabled divide-by-zero exceptions. The exception stack frame is a divide-by-zero
156 	fsave		-(%sp)
159 	bral		trap	| jump to trap handler
164 | This is the exit point for the 060FPSP when an enabled inexact exception
165 | is present. The routine below should point to the operating system handler
175 	fsave		-(%sp)
178 	bral		trap	| jump to trap handler
183 | This is the exit point for the 060FPSP when an enabled bsun exception
184 | is present. The routine below should point to the operating system handler
190 | bsun will now be re-executed but with the NaN FPSR bit cleared.
194 |	fsave		-(%sp)
196 	fmove.l		%fpsr,-(%sp)
200 	bral		trap	| jump to trap handler
205 | This is the exit point for the 060FPSP when an F-Line Illegal exception is
206 | encountered. Three different types of exceptions can enter the F-Line exception
208 | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
209 | _fpsp_fline() distinguishes between the three and acts appropriately. F-Line
214 	bral		trap	| jump to trap handler
219 | This is the exit point for the 060FPSP when an FPU disabled exception is
220 | encountered. Three different types of exceptions can enter the F-Line exception
222 | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
227 | frame to the PC of the instruction causing the exception, and does an "rte".
228 | The execution of the instruction then proceeds with an enabled floating-point
233 	move.l		%d0,-(%sp)		| enabled the fpu
245 | This is the exit point for the 060FPSP when an emulated "ftrapcc" instruction
246 | discovers that the trap condition is true and it should branch to the operating
253 	bral		trap	| jump to trap handler
300 | (3) EXAMPLE CALL-OUT SECTION #
306 	.long	_060_real_bsun		- _FP_CALL_TOP
307 	.long	_060_real_snan		- _FP_CALL_TOP
308 	.long	_060_real_operr		- _FP_CALL_TOP
309 	.long	_060_real_ovfl		- _FP_CALL_TOP
310 	.long	_060_real_unfl		- _FP_CALL_TOP
311 	.long	_060_real_dz		- _FP_CALL_TOP
312 	.long	_060_real_inex		- _FP_CALL_TOP
313 	.long	_060_real_fline		- _FP_CALL_TOP
314 	.long	_060_real_fpu_disabled	- _FP_CALL_TOP
315 	.long	_060_real_trap		- _FP_CALL_TOP
316 	.long	_060_real_trace		- _FP_CALL_TOP
317 	.long	_060_real_access	- _FP_CALL_TOP
318 	.long	_060_fpsp_done		- _FP_CALL_TOP
322 	.long	_060_imem_read		- _FP_CALL_TOP
323 	.long	_060_dmem_read		- _FP_CALL_TOP
324 	.long	_060_dmem_write		- _FP_CALL_TOP
325 	.long	_060_imem_read_word	- _FP_CALL_TOP
326 	.long	_060_imem_read_long	- _FP_CALL_TOP
327 	.long	_060_dmem_read_byte	- _FP_CALL_TOP
328 	.long	_060_dmem_read_word	- _FP_CALL_TOP
329 	.long	_060_dmem_read_long	- _FP_CALL_TOP
330 	.long	_060_dmem_write_byte	- _FP_CALL_TOP
331 	.long	_060_dmem_write_word	- _FP_CALL_TOP
332 	.long	_060_dmem_write_long	- _FP_CALL_TOP
340 | 060 FPSP KERNEL PACKAGE NEEDS TO GO HERE!!!