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sync branch #3

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merged 2 commits into from
Jun 28, 2023
Merged

sync branch #3

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d3b4ec5
calling convention + get rid of stupid tabs
spsandwichman Jun 27, 2023
8976755
newline
spsandwichman Jun 27, 2023
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14 changes: 7 additions & 7 deletions arch/quickref.md
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Original file line number Diff line number Diff line change
Expand Up @@ -3,17 +3,17 @@
Registers - 64 bits wide

rz always reads zero, writes are ignored
ra general purpose
rb general purpose
rc general purpose
rd general purpose
ra general purpose (function parameters)
rb general purpose (function parameters)
rc general purpose (function parameters)
rd general purpose (function parameters)
re general purpose
rf general purpose
rg general purpose
rh general purpose
ri general purpose
rj general purpose
rk general purpose
ri general purpose (callee saved)
rj general purpose (callee saved)
rk general purpose (callee saved)
pc program counter - points to current instruction in memory
sp stack pointer - stack grows down
fp frame pointer
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30 changes: 15 additions & 15 deletions handbook/branch.txt
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@@ -1,17 +1,17 @@
instruction func description
instruction func description

bra 0 0000 true
beq 1 0001 equal
bez 2 0010 zero
blt 3 0011 less than
ble 4 0100 less than or equal to
bltu 5 0101 less than (unsigned)
bleu 6 0110 less than or equal to (unsigned)
bpe 7 0111 parity bit enabled (odd)
bne 9 1001 not equal
bnz A 1010 not zero
bge B 1011 greater than or equal to
bgt C 1100 greater than
bgeu D 1101 greater than or equal to (unsigned)
bgtu E 1110 greater than (unsigned)
bpd F 1111 parity bit disabled (even)
beq 1 0001 equal
bez 2 0010 zero
blt 3 0011 less than
ble 4 0100 less than or equal to
bltu 5 0101 less than (unsigned)
bleu 6 0110 less than or equal to (unsigned)
bpe 7 0111 parity bit enabled (odd)
bne 9 1001 not equal
bnz A 1010 not zero
bge B 1011 greater than or equal to
bgt C 1100 greater than
bgeu D 1101 greater than or equal to (unsigned)
bgtu E 1110 greater than (unsigned)
bpd F 1111 parity bit disabled (even)
3 changes: 2 additions & 1 deletion handbook/registers.txt
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Expand Up @@ -9,4 +9,5 @@ D sp stack pointer
E fp frame pointer
F st status register, contains bit flags and information about the processor state

note - fp and st are initialized to 0 and that the stack expands downward. in order to use the stack, you must relocate the stack somewhere specific.
note - fp and st are initialized to 0 and that the stack expands downward.
in order to use the stack, you must relocate the stack somewhere specific.