ifpsp060/src/fpsp.S

1222 # stack an ea. however, we don't need an a7' for this case anyways.
1266 # we don't know whether the src operand or the dst operand (or both) is the
1318 #	INEX1	: none (packed doesn't go through here)
1509 # fmove out doesn't affect ccodes.
1658 # we don't mess with the existing fsave frame. just re-insert it and
1666 	short		tbl_fu_out	- tbl_fu_out	# SNAN can't happen
1672 	short		tbl_fu_out	- tbl_fu_out	# INEX1 won't make it here
1914 # shift the stack frame "up". we don't really care about the <ea> field.
2068 # fmove out doesn't affect ccodes.
2586 	st		STORE_FLG(%a6)		# don't store a final result
2929 # this ain't a pretty solution, but it works:
3133 # denorm operand in the sgl or dbl format. NANs also become skewed, but can't
3161 # exceptions, they won't pass through here since they are caught
3198 	short		tbl_operr    - tbl_operr # ext prec shouldn't happen
3201 	short		tbl_operr    - tbl_operr # dbl prec shouldn't happen
3285 #	For opclass 3 instructions, the 060 doesn't store the default	#
3368 	short		fsnan_out_x - tbl_snan # ext prec shouldn't happen
3583 # hardware doesn't store the correct result to the destination FP	#
3719 # exceptions, they won't pass through here since they are caught
4216 # appropriate type. don't forget to "skew" the source operand in case we
7035 #		where T and t are the stored values for 2^(J/64).	#
7036 #	Notes:	2^(J/64) is stored as T and t where T+t approximates	#
7038 #		and t is in single precision. Note also that T is	#
7049 #		6.2	ans := T + (p + (t + OnebySc)). Go to 6.6	#
7051 #		6.4	ans := (T + (p + t)) + OnebySc. Go to 6.6	#
7052 #		6.5	ans := (T + OnebySc) + (p + t).			#
8428 # if these 2 lines weren't here, the correct answer would be returned
9630 # later. we don't do this with the DENORMs above because this method
9631 # is slower. but, don't fret, I don't see it being used much either.
10262 #	- This routine is for cases where even an EXOP isn't	#
10304 	bra.b		ovfl_work		# don't set INEX2
11353 # transcendental emulation. hopefully, this won't be happening much	#
11619 # normalized then we really don't need to go through this scaling. but for now,
11757 # no, it didn't overflow; we have correct result
11870 # we still don't know if underflow occurred. result is ~ equal to 2. but,
11986 # Note: The j-bit for an infinity is a don't-care. However, to be
12276 # now, round to extended(and don't alter the FPSR).
12330 # prec:mode should be zero at this point but it won't affect answer anyways.
12638 # we still don't know if underflow occurred. result is ~ equal to 1. but,
13056 # now, round to extended(and don't alter the FPSR).
13110 # prec:mode should be zero at this point but it won't affect answer anyways.
13324 #	Separate according to operand type. Unnorms don't pass through	#
13444 #	Unnorms don't pass through here.				#
13706 # no, it didn't overflow; we have correct result
13950 # instruction won't cause an exception. Use the regular fsglmul to	#
14165 # we still don't know if underflow occurred. result is ~ equal to 2. but,
14291 # instruction won't cause an exception. Use the regular fsgldiv to	#
14502 # we don't know if the result was an underflow that rounded up to a 1
14628 #	Do addition after scaling exponents such that exception won't	#
15081 #	Do subtraction after scaling exponents such that exception won't#
15791 # no, it didn't overflow; we have correct result
18048 # is enabled. if so, don't store result and correct stack frame
18099 # fails then don't update the address register. if write passes then