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Author	SHA1	Message	Date
Eddie Hung	c54a39069d	CO is sign extension only if signed multiplier	2019-08-01 10:00:49 -07:00
Eddie Hung	e3c39cc450	Fix typo	2019-08-01 10:00:01 -07:00
Eddie Hung	d2c33863d0	Do not compute sign bit if result is zero	2019-07-31 16:04:19 -07:00
Eddie Hung	60c4887d15	For signed multipliers, compute sign bit separately...	2019-07-31 15:45:41 -07:00
Eddie Hung	e4a638c292	Restore old CO behaviour	2019-07-31 15:45:15 -07:00
Eddie Hung	84c7a562e5	Helper: SigSpec::operator[] to accept negative indices	2019-07-31 12:18:03 -07:00
Eddie Hung	2f71c2c219	Fix spacing	2019-07-26 15:30:51 -07:00
Eddie Hung	07e38d8d5c	Update test_autotb doc to reflect default value of zero	2019-07-26 12:37:30 -07:00
Eddie Hung	8cecad5059	Add doc for "test_autotb -seed" option	2019-07-26 12:26:54 -07:00
Eddie Hung	4c25d1a76f	Pop the CO bit from O	2019-07-26 10:27:30 -07:00
Eddie Hung	c1a05f4557	Allow adders/accumulators with 33 bits using CO output	2019-07-26 10:15:36 -07:00
Eddie Hung	c39ccc65e9	Add copyright header, comment on cascade	2019-07-24 10:49:09 -07:00
Eddie Hung	79fd6edc5a	Eliminate warnings by sizing O correctly	2019-07-23 15:13:30 -07:00
Eddie Hung	151c5c96c0	Typo for Y_WIDTH	2019-07-23 15:05:20 -07:00
Eddie Hung	a37574ccbf	Fix muxAB logic	2019-07-23 14:52:14 -07:00
Eddie Hung	0dd2a125f6	Remove debug print	2019-07-23 14:21:45 -07:00
Eddie Hung	dc0c853abe	Simplify and fix for MACs	2019-07-23 14:20:34 -07:00
Eddie Hung	4f11ff8ebd	Fix typo	2019-07-23 13:58:56 -07:00
Eddie Hung	33c984a044	Fix spacing	2019-07-22 16:37:13 -07:00
Eddie Hung	cb505c50d3	Remove debug	2019-07-22 16:14:15 -07:00
Eddie Hung	068617f094	Pack hi and lo registers separately	2019-07-22 16:12:57 -07:00
Eddie Hung	8c31441ba0	SigSpec::extract() to return as many bits as poss if out of bounds	2019-07-22 16:10:21 -07:00
Eddie Hung	4d71ab384d	Rename according to vendor doc TN1295	2019-07-22 15:08:26 -07:00
Eddie Hung	304cefbbe2	Pack Y register	2019-07-22 15:05:16 -07:00
Eddie Hung	5e70b8a22b	opt and wreduce necessary for -dsp	2019-07-22 13:48:33 -07:00
Eddie Hung	5a14b6e1f6	Pack adders not just accumulators	2019-07-22 13:01:49 -07:00
Eddie Hung	3a7aeb028d	Use minimum sized width wires	2019-07-22 13:01:26 -07:00
Eddie Hung	e0720a8018	Restore old ffY behaviour	2019-07-19 22:47:08 -07:00
Eddie Hung	f9d08a5e5e	Cleanup	2019-07-19 20:25:28 -07:00
Eddie Hung	47fd042b9f	Indirection via $__soft_mul	2019-07-19 20:20:33 -07:00
Eddie Hung	595a8f032f	Do not do sign extension in techmap; let packer do it	2019-07-19 15:50:13 -07:00
Eddie Hung	e87916b7eb	Merge remote-tracking branch 'origin/eddie/wreduce_add' into ice40dsp	2019-07-19 14:03:34 -07:00
Eddie Hung	c926eeb43a	Add another test	2019-07-19 14:02:46 -07:00
Eddie Hung	cb0fd05215	Do not access beyond bounds	2019-07-19 13:58:50 -07:00
Eddie Hung	54708dfbd7	Add an SigSpec::at(offset, defval) convenience method	2019-07-19 13:54:57 -07:00
Eddie Hung	3a87dc3524	Wrap A and B in sigmap	2019-07-19 13:23:07 -07:00
Eddie Hung	31b0002e8c	Remove "top" from message	2019-07-19 13:20:45 -07:00
Eddie Hung	8791e0caac	Merge remote-tracking branch 'origin/eddie/wreduce_add' into ice40dsp	2019-07-19 13:18:20 -07:00
Eddie Hung	bcd8027182	Also optimise MSB of $sub	2019-07-19 13:11:48 -07:00
Eddie Hung	5bd088a686	Add one more test with trimming Y_WIDTH of $sub	2019-07-19 13:11:30 -07:00
Eddie Hung	415a2716df	Be more explicit	2019-07-19 12:53:18 -07:00
Eddie Hung	fc0e36d1c0	wreduce for $sub	2019-07-19 12:50:21 -07:00
Eddie Hung	4e9b1d36fa	Add tests for sub too	2019-07-19 12:50:11 -07:00
Eddie Hung	3839bd50f2	Add test	2019-07-19 12:43:02 -07:00
Eddie Hung	25ff27e37f	SigSpec::extract to take negative lengths	2019-07-19 12:34:04 -07:00
Eddie Hung	bba72f03dd	Do not $mul -> $__mul if A and B are less than maxwidth	2019-07-19 11:54:26 -07:00
Eddie Hung	3dc3c749d5	Add DSP_MINWIDTH=11 for ice40 since ice40_dsp uses this threshold	2019-07-19 11:41:00 -07:00
Eddie Hung	1d14cec7fd	Add a DSP_MINWIDTH macro, and soft-logic for {A_WIDTH,B_WIDTH} <= 1 too	2019-07-19 11:39:24 -07:00
Eddie Hung	9ad11ea2cc	Fine tune ice40_dsp.pmg, add support for packing subsets of registers	2019-07-19 10:57:32 -07:00
Eddie Hung	8f0e796be1	Add support for ice40 signed multipliers	2019-07-19 10:38:13 -07:00