heph
synopsis
heph is a mixed imperative-declarative format
which seeks to fully encode a forth dictionary in a
completely platform-agnostic manner. this includes
encoding any native codewords, a process aided by the
heph IR, a complementary minimal, platform-agnostic
intermediate representation of basic machine code.
header layout
|
magic
|
vendor
|
| +0 |
+1 |
+2 |
+3 |
+4 |
+5 |
+6 |
+7 |
+8 |
+9 |
| 91h |
16h |
84h |
80h |
[1]
|
|
static count
|
word count
|
| +10 |
+11 |
+12 |
+13 |
|
[2]
|
[3]
|
[1] - this should be a vendor field provided as a pair of three byte fields. namely, the first three bytes should be a vendor signature, while the last three bytes should be a system signature.
[2] - this must be the sum size of all static data elements in bytes, i.e. the length fields of octet blocks + 2 × the length fields of doublet blocks.
[3] - this must be the total word count of the file, i.e. the total amount of header elements of any kind.
ir
|
+0 |
+1 |
+2 |
+3 |
| 2-op |
0 |
mov |
jmp |
jnz |
add |
| 4 |
sub |
and |
or |
xor |
| 8 |
out |
in |
|
|
| 1-op |
lsh |
rsh |
neg |
sys |