Commit a73f6e1d9403af7b480e760e440bf11e406a27e1 - SixtyPical

Update HISTORY and README. Chris Pressey 3 years ago

2 changed file(s) with 19 addition(s) and 15 deletion(s). Raw diff Collapse all Expand all

-4

HISTORY.md less more

3	3	0.16
4	4	----
5	5
6		* Removed `--prelude` in favour of specifying both format and prelude
7		with a single option, `--output-format`. Documentation for same.
8		* `or a, z`, `and a, z`, and `eor a, z` compile to zero-page operations
9		if the address of z < 256.
	6	* Added `save` block, which allows the named locations to be modified
	7	arbitrarily inside the block, and automatically restored at the end.
10	8	* More thorough tests and justifications written for the case of
11	9	assigning a routine to a vector with a "wider" type.
12	10	* Support for `copy [ptra]+y, [ptrb]+y` to indirect LDA indirect STA.

14	12	* Support for `I a, btable + x` where `I` is `add`, `sub`, `cmp`,
15	13	`and`, `or`, or `xor`
16	14	* Support for `I btable + x` where `I` is `shl`, `shr`, `inc`, `dec`
	15	* `or a, z`, `and a, z`, and `eor a, z` compile to zero-page operations
	16	if the address of z < 256.
	17	* Removed `--prelude` in favour of specifying both format and prelude
	18	with a single option, `--output-format`. Documentation for same.
17	19
18	20	0.15
19	21	----

+13

-11

README.md less more

86	86	It might make more sense, then, for it to be "part of the operation" instead of "part of
87	87	the reference"; something like `st.hi x, word`; `st.lo y, word`. Dunno.
88	88
89		### Save values
	89	### Save multiple values in single block
90	90
91		This preserves them, so that, semantically, they can be used later even though they
92		are trashed (or otherwise alternately used) inside the block.
93
94		Inside the block, we set them as writeable (but not meaningful). When the block
95		exits, we restore whatever status they had.
96
97		This act will trash `a`, both in the block, and outside it, unless the value being
98		saved is `a`. One idiom would be something like
	91	As a shortcut for the idiom
99	92
100	93	save a { save var {
101	94	...
102	95	} }
103	96
104		which would save all values. Maybe abbreviate this to
	97	allow
105	98
106	99	save a, var {
107	100	...
108	101	}
109	102
110		This can use the stack. But it need not use the stack.
	103	### Save values to other-than-the-stack
	104
	105	Allow
	106
	107	save a to temp_a {
	108	...
	109	}
	110
	111	Which uses some other storage location instead of the stack. A local static
	112	would be a good candidate for such.
111	113
112	114	### Make all symbols forward-referencable
113	115