Term
| lw register_destination, RAM_source |
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Definition
| #copy word (4 bytes) at source RAM location to destination register. |
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Term
| lb register_destination, RAM_source |
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Definition
#copy byte at source RAM location to low-order byte of destination register,
# and sign-e.g.tend to higher-order bytes |
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Term
| sw register_source, RAM_destination |
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Definition
| #store word in source register into RAM destination |
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Term
| sb register_source, RAM_destination |
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Definition
| #store byte (low-order) in source register into RAM destination |
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| li register_destination, value |
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Definition
| #load immediate value into destination register |
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Term
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Definition
| copy RAM address of var1 (presumably a label defined in the program) into register $t0 |
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Definition
| load word at RAM address contained in $t0 into $t2 |
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Definition
| store word in register $t2 into RAM at address contained in $t0 |
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Definition
* load word at RAM address ($t0+4) into register $t2
* "4" gives offset from address in register $t0 |
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Definition
* store word in register $t2 into RAM at address ($t0 - 12)
* negative offsets are fine |
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Definition
| # $t0 = $t1 + $t2; add as signed (2's complement) integers |
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Definition
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Definition
| # $t2 = $t3 + 5; "add immediate" (no sub immediate) |
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Definition
| # $t1 = $t6 + $t7; add as unsigned integers |
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Term
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Definition
| # $t1 = $t6 - $t7; subtract as unsigned integers |
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Definition
# multiply 32-bit quantities in $t3 and $t4, and store 64-bit
# result in special registers Lo and Hi: (Hi,Lo) = $t3 * $t4 |
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Definition
# Lo = $t5 / $t6 (integer quotient)
# Hi = $t5 mod $t6 (remainder) |
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Definition
| # move quantity in special register Hi to $t0: $t0 = Hi |
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Definition
# move quantity in special register Lo to $t1: $t1 = Lo
# used to get at result of product or quotient |
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Definition
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Definition
| # unconditional branch to program label target |
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Definition
| # branch to target if $t0 = $t1 |
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Definition
| # branch to target if $t0 < $t1 |
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Definition
| # branch to target if $t0 <= $t1 |
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Term
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Definition
| # branch to target if $t0 > $t1 |
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Term
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Definition
| # branch to target if $t0 >= $t1 |
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Term
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Definition
| # branch to target if $t0 <> $t1 |
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Definition
| # unconditional jump to program label target |
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Definition
| # jump to address contained in $t3 ("jump register") |
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Definition
# "jump and link"
* copy program counter (return address) to register $ra (return address register)
* jump to program statement at sub_label |
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Definition
# "jump register"
* jump to return address in $ra (stored by jal instruction) |
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