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Introduce partial Blitter sequencer test.

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This commit is contained in:
Thomas Harte 2022-07-26 21:28:12 -04:00
parent 2c95dea4db
commit 86246e4f45
1 changed files with 58 additions and 0 deletions
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58
OSBindings/Mac/Clock SignalTests/AmigaBlitterTests.mm
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@ -271,4 +271,62 @@ using WriteVector = std::vector<std::pair<uint32_t, uint16_t>>;
[self testCase:@"inclusive fills"];
}
- (void)testSequencer {
// These patterns are faithfully transcribed from the HRM's
// 'Pipeline Register' section, as captured online at
// http://www.amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0127.html
NSArray<NSString *> *const patterns = @[
@"- - - -",
@"D0 - D1 - D2",
@"C0 - C1 - C2",
@"C0 - - C1 D0 - C2 D1 - D2",
@"B0 - - B1 - - B2",
@"B0 - - B1 D0 - B2 D1 - D2",
@"B0 C0 - B1 C1 - B2 C2",
@"B0 C0 - - B1 C1 D0 - B2 C2 D1 - D2",
@"A0 - A1 - A2",
];
const int lengths[] = {
4, 5, 5, 10, 7, 10, 8, 13, 5, 8, 6, 11, 8, 11, 9, 13
};
for(int c = 0; c < 9; c++) {
Amiga::BlitterSequencer sequencer;
sequencer.set_control(c);
int counts[4]{};
const int writes = 2;
int length = lengths[c];
bool is_first_write = c > 1; // control = 1 is D only, in which case don't pipeline.
NSMutableArray<NSString *> *const components = [[NSMutableArray alloc] init];
while(length--) {
const auto next = sequencer.next();
using Channel = Amiga::BlitterSequencer::Channel;
switch(next) {
case Channel::None: [components addObject:@"-"]; break;
case Channel::A: [components addObject:[NSString stringWithFormat:@"A%d", counts[0]++]]; break;
case Channel::B: [components addObject:[NSString stringWithFormat:@"B%d", counts[1]++]]; break;
case Channel::C: [components addObject:[NSString stringWithFormat:@"C%d", counts[2]++]]; break;
case Channel::Write:
if(is_first_write) {
is_first_write = false;
[components addObject:@"-"];
} else {
[components addObject:[NSString stringWithFormat:@"D%d", counts[3]++]];
if(counts[3] == writes) sequencer.complete();
}
break;
default: break;
}
}
NSString *pattern = [components componentsJoinedByString:@" "];
XCTAssertEqualObjects(pattern, patterns[c]);
}
}
@end