adds basic legv8 snippets #8
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| { | ||
| "set register": { | ||
| "prefix": "sreg", | ||
| "body": ["ADD ${1:Rd}, XZR, ${2:Rm}", "$3"], | ||
| "description": "R[d] = R[m]. Set one register (Rd) to the value of another (Rm)." | ||
| }, | ||
| "increment register (immediate)": { | ||
| "prefix": "addi", | ||
| "body": ["ADDI ${1:Rd}, ${1:Rd}, #${2:Imm}", "$3"], | ||
| "description": "R[Rd] = R[Rd] + Imm. Increment the Rd register by the value of Imm" | ||
| }, | ||
| "decrement register (immediate)": { | ||
| "prefix": "subi", | ||
| "body": ["SUBI ${1:Rd}, ${1:Rd}, #${2:Imm}", "$3"], | ||
| "description": "R[Rd] = R[Rd] + Imm. Decrement the Rd register by the value of Imm." | ||
| }, | ||
| "increment register": { | ||
| "prefix": "add", | ||
| "body": ["ADD ${1:Rd}, ${1:Rd}, ${2:Rm}", "$3"], | ||
| "description": "R[Rd] = R[Rd] + R[Rm]. Increment one register (Rd) with the value of another register (Rm)." | ||
| }, | ||
| "decrement register": { | ||
| "prefix": "sub", | ||
| "body": ["SUB ${1:Rd}, ${1:Rd}, ${2:Rm}", "$3"], | ||
| "description": "R[Rd] = R[Rd] - R[Rm]. Decrement one register (Rd) with the value of another register (Rm). " | ||
| }, | ||
|
|
||
| "stack manipulation with 1 register": { | ||
| "prefix": "stk1", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #16 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #8] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #0] // store $reg1", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg1, [SP, #0] // restore $reg1", | ||
| "LDUR LR, [SP, #8] // restore LR", | ||
| "ADDI SP, SP, #16 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 2 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 2 registers": { | ||
| "prefix": "stk2", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #24 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #16] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #8] // store $reg1", | ||
| "STUR $reg2, [SP, #0] // store $reg2", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg2, [SP, #0] // restore $reg2", | ||
| "LDUR $reg1, [SP, #8] // restore $reg1", | ||
| "LDUR LR, [SP, #16] // restore LR", | ||
| "ADDI SP, SP, #24 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 3 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 3 registers": { | ||
| "prefix": "stk3", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #32 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #24] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #16] // store $reg1", | ||
| "STUR $reg2, [SP, #8] // store $reg2", | ||
| "STUR $reg3, [SP, #0] // store $reg3", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg3, [SP, #0] // restore $reg3", | ||
| "LDUR $reg2, [SP, #8] // restore $reg2", | ||
| "LDUR $reg1, [SP, #16] // restore $reg1", | ||
| "LDUR LR, [SP, #24] // restore LR", | ||
| "ADDI SP, SP, #32 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 4 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 4 registers": { | ||
| "prefix": "stk4", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #40 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #32] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #24] // store $reg1", | ||
| "STUR $reg2, [SP, #16] // store $reg2", | ||
| "STUR $reg3, [SP, #8] // store $reg3", | ||
| "STUR $reg4, [SP, #0] // store $reg4", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg4, [SP, #0] // restore $reg4", | ||
| "LDUR $reg3, [SP, #8] // restore $reg3", | ||
| "LDUR $reg2, [SP, #16] // restore $reg2", | ||
| "LDUR $reg1, [SP, #24] // restore $reg1", | ||
| "LDUR LR, [SP, #32] // restore LR", | ||
| "ADDI SP, SP, #40 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 5 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 5 registers": { | ||
| "prefix": "stk5", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #48 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #40] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #32] // store $reg1", | ||
| "STUR $reg2, [SP, #24] // store $reg2", | ||
| "STUR $reg3, [SP, #16] // store $reg3", | ||
| "STUR $reg4, [SP, #8] // store $reg4", | ||
| "STUR $reg5, [SP, #0] // store $reg5", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg5, [SP, #0] // restore $reg5", | ||
| "LDUR $reg4, [SP, #8] // restore $reg4", | ||
| "LDUR $reg3, [SP, #16] // restore $reg3", | ||
| "LDUR $reg2, [SP, #24] // restore $reg2", | ||
| "LDUR $reg1, [SP, #32] // restore $reg1", | ||
| "LDUR LR, [SP, #40] // restore LR", | ||
| "ADDI SP, SP, #48 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 6 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 6 registers": { | ||
| "prefix": "stk6", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #56 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #48] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #40] // store $reg1", | ||
| "STUR $reg2, [SP, #32] // store $reg2", | ||
| "STUR $reg3, [SP, #24] // store $reg3", | ||
| "STUR $reg4, [SP, #16] // store $reg4", | ||
| "STUR $reg5, [SP, #8] // store $reg5", | ||
| "STUR $reg6, [SP, #0] // store $reg6", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg6, [SP, #0] // restore $reg6", | ||
| "LDUR $reg5, [SP, #8] // restore $reg5", | ||
| "LDUR $reg4, [SP, #16] // restore $reg4", | ||
| "LDUR $reg3, [SP, #24] // restore $reg3", | ||
| "LDUR $reg2, [SP, #32] // restore $reg2", | ||
| "LDUR $reg1, [SP, #40] // restore $reg1", | ||
| "LDUR LR, [SP, #48] // restore LR", | ||
| "ADDI SP, SP, #56 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 7 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "stack manipulation with 7 registers": { | ||
| "prefix": "stk7", | ||
| "body": [ | ||
| "// storing registers in stack before changing them", | ||
| "SUBI SP, SP, #64 // make room on stack (SP) for 2 registers", | ||
| "STUR LR, [SP, #56] // store return adress (LR) of procedure", | ||
| "STUR $reg1, [SP, #48] // store $reg1", | ||
| "STUR $reg2, [SP, #40] // store $reg2", | ||
| "STUR $reg3, [SP, #32] // store $reg3", | ||
| "STUR $reg4, [SP, #24] // store $reg4", | ||
| "STUR $reg5, [SP, #16] // store $reg5", | ||
| "STUR $reg6, [SP, #8] // store $reg6", | ||
| "STUR $reg7, [SP, #0] // store $reg7", | ||
| "// body of the procedure", | ||
| "$body", | ||
| "// restoring saved registers from stack", | ||
| "LDUR $reg7, [SP, #0] // restore $reg7", | ||
| "LDUR $reg6, [SP, #8] // restore $reg6", | ||
| "LDUR $reg5, [SP, #16] // restore $reg5", | ||
| "LDUR $reg4, [SP, #24] // restore $reg4", | ||
| "LDUR $reg3, [SP, #32] // restore $reg3", | ||
| "LDUR $reg2, [SP, #40] // restore $reg2", | ||
| "LDUR $reg1, [SP, #48] // restore $reg1", | ||
| "LDUR LR, [SP, #56] // restore LR", | ||
| "ADDI SP, SP, #64 // restore previous space on stack" | ||
| ], | ||
| "description": "Use this to save 8 registers in the Stack, including the return address of the procedure (where the procedure was called)" | ||
| }, | ||
| "incremental for loop": { | ||
|
There was a problem hiding this comment. A few suggestions for the loop.
"increasing for loop": {
"prefix": "for_increasing",
"body": [
"${1:loop name}_loop:",
"// if counter ($2) greater than or equal to limit ($3), then exit",
"SUBS XZR, ${2:counter}, ${3:upper_limit}",
"B.GE ${1}_loop_done",
"// loop body",
"",
"// increment counter ($2) by $4",
"ADDI $2, $2, #${4:increment_amount}",
"B $1_loop",
"$1_loop_done:"
],
"description": "Creates a for loop from counter to upper_limit. for (; counter < upper_limit; counter += increment_amount); Note: the counter and array size must be initialized before the loop."
}, |
||
| "prefix": "for_incremental", | ||
| "body": [ | ||
| "${1:loop name}_loop:", | ||
| "//comparing pointer to array length; if equal then exit", | ||
| "SUBS XZR, ${2:counter}, ${3:upper_limit}", | ||
| "B.GE ${1}_loop_exit", | ||
| "//loop body", | ||
| " ", | ||
| "// increment counter ($2) by $4", | ||
| "ADDI $2, $2, #${4:increment_amount}", | ||
| "B $1_loop", | ||
| "${1}_loop_exit:" | ||
| ], | ||
| "description": "Creates a for loop that increments from counter to upper_limit. Equivalent In C: for (counter = <value>; counter < upper_limit; counter += increment_amount){ //loop body }. Note: the counter and upper limit must be initialized before the loop" | ||
| }, | ||
| "decremental for loop": { | ||
| "prefix": "for_decremental", | ||
| "body": [ | ||
| "${1:loop name}_loop:", | ||
| "//comparing pointer to 0; if equal then exit", | ||
| "CBZ ${2:counter}, ${1}_loop_exit", | ||
| "//loop body", | ||
| " ", | ||
| "// decrement pointer", | ||
| "SUBI $2, $2, #${3:decrement_amount}", | ||
| "B ${1}_loop", | ||
| "${1}_loop_exit:" | ||
| ], | ||
| "description": "Creates a for loop that decrements from counter to 0. Equivalent in C: for (counter = <value>; counter > 0; counter --){ //loop body }. Note: the counter must be initialized before the loop" | ||
| }, | ||
|
|
||
| "return statement": { | ||
| "prefix": "br", | ||
| "body": ["BR LR"], | ||
| "description": "returns to the caller (LR)" | ||
| }, | ||
| "call procedure": { | ||
| "prefix": "bl", | ||
| "body": ["BL ${1:procedure name}"], | ||
| "description": "calls a procedure with the given name" | ||
| } | ||
| } | ||
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Add description for all of them. Also try to make it easy to realize what the command does.
So if the code inserted is something to the effect of
ADDI reg, reg, #1, show how to think of it in basic math terms, likereg = reg + 1There was a problem hiding this comment.
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Good comment! It`s implemented
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Awesome! In addition to the math part, could you add a small text description? Also, having the description and placeholder text be the same may be useful. Such as:
Thoughts?