forked from TCShenanigans/symphony_stdlib

Files

T

PleegWat 2f09320fa5 Add optimization for arbitrary aligned values

Any value with 16 or less significant bits but larger than 64k is loaded
in one fewer cycle

2026-09-05 15:39:55 +02:00

default.isa

Add ISA definitions for symphony

2026-09-05 15:36:54 +02:00

README.md

Add ISA definitions for symphony

2026-09-05 15:36:54 +02:00

test.isa

Add optimization for arbitrary aligned values

2026-09-05 15:39:55 +02:00

README.md

Symphony ISA specs for use in stdlib

`default.isa`

The stock game ISA. Production code must comply to this. Taken from symphony_11_functions in game version 2.1.330A

`test.isa`

ISA with additional instructions. These additional instructions may be used in the tests directory only. Some of these instructions require hardware changes.

Labels in more instructions

cmp, load, and store instructions (but not pload and pstore) now also accept labels.

`qcall %a(label)`

Performs a jump-and-link function call, with label size up to 32 bits.

HARDWARE: Store PC+4 in the result register when in jump mode.

`li %a(register) %b:U32(immediate | label)`

Loads an immediate up to 32 bits long

HARDWARE: No requirements

`halt%c(condition)`

Halts if flags matches the condition.

HARDWARE: Halt if instruction bit 31 is set AND the condition block is true.

condition
""     1000
".all" 1000
".e"   0001
".ne"  1001
".b"   0010
".ae"  1010
".be"  0011
".a"   1011
".l"   0100
".ge"  1100
".le"  0101
".g"   1101