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load_complex and store_complex instructions (#309)

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* Start adding the load_complex and store_complex instructions.

N.b.:
The text format is not correct yet. Requires changes to the lexer and parser.
I'm not sure why I needed to change the RuntimeError to Exception yet. Will fix.

* Get first few encodings of load_complex working. Still needs var args type checking.

* Clean up ModRM helper functions in binemit.

* Implement 32-bit displace for load_complex

* Use encoding helpers instead of doing them all by hand

* Initial implementation of store_complex

* Parse value list for load/store_complex with + as delimiter. Looks nice.

* Add sign/zero-extension and size variants for load_complex.

* Add size variants of store_complex.

* Add asm helper lines to load/store complex bin tests.

* Example of length-checking the instruction ValueList for an encoding. Extremely questionable implementation.

* Fix Python linting issues

* First draft of postopt pass to fold adds and loads into load_complex. Just simple loads for now.

* Optimization pass now works with all types of loads.

* Add store+add -> store_complex to postopt pass

* Put complex address optimization behind ISA flag.

* Add load/store complex for f32 and f64

* Fixes changes to lexer that broke NaN parsing.

Abstracts away the repeated checks for whether or not the characters
following a + or - are going to be parsed as a number or not.

* Fix formatting issues

* Fix register restrictions for complex addresses.

* Encoding tests for x86-32.

* Add documentation for newly added instructions, recipes, and cdsl changes.

* Fix python formatting again

* Apply value-list length predicates to all LoadComplex and StoreComplex instructions.

* Add predicate types to new encoding helpers for mypy.

* Import FieldPredicate to satisfy mypy.

* Add and fix some "asm" strings in the encoding tests.

* Line-up 'bin' comments in x86/binary64 test

* Test parsing of offset-less store_complex instruction.

* 'sNaN' not 'sNan'

* Bounds check the lookup for polymorphic typevar operand.

* Fix encodings for istore16_complex.
This commit is contained in:
Tyler McMullen
2018-05-09 12:07:00 -07:00
committed by Dan Gohman
parent 5aa84a744b
commit f636d795c5
25 changed files with 1127 additions and 21 deletions
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33
lib/reader/src/lexer.rs
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@@ -22,6 +22,7 @@ pub enum Token<'a> {
LBracket, // '['
RBracket, // ']'
Minus, // '-'
Plus, // '+'
Comma, // ','
Dot, // '.'
Colon, // ':'
@@ -169,6 +170,25 @@ impl<'a> Lexer<'a> {
self.source[self.pos..].starts_with(prefix)
}
// Starting from `lookahead`, are we looking at a number?
fn looking_at_numeric(&self) -> bool {
if let Some(c) = self.lookahead {
if c.is_digit(10) {
return true;
}
match c {
'-' => return true,
'+' => return true,
'.' => return true,
_ => {}
}
if self.looking_at("NaN") || self.looking_at("Inf") || self.looking_at("sNaN") {
return true;
}
}
false
}
// Scan a single-char token.
fn scan_char(&mut self, tok: Token<'a>) -> Result<LocatedToken<'a>, LocatedError> {
assert_ne!(self.lookahead, None);
@@ -234,16 +254,17 @@ impl<'a> Lexer<'a> {
match self.lookahead {
Some('-') => {
self.next_ch();
if let Some(c) = self.lookahead {
// If the next character won't parse as a number, we return Token::Minus
if !c.is_alphanumeric() && c != '.' {
return token(Token::Minus, loc);
}
if !self.looking_at_numeric() {
// If the next characters won't parse as a number, we return Token::Minus
return token(Token::Minus, loc);
}
}
Some('+') => {
self.next_ch();
if !self.looking_at_numeric() {
// If the next characters won't parse as a number, we return Token::Minus
return token(Token::Plus, loc);
}
}
_ => {}
}