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sdc1

Store doubleword from FP register pair

Writes the 64-bit value in the even FP register pair $f2/$f3 to memory at address ($t2 + offset).

Forms

  • sdc1 , ()

Pseudo-instructions

The assembler turns these into one or more real instructions.

  • Write to label's address, reached through the %hi already in $t2

Store 64 bits from $f2 and $f3 register pair to effective memory doubleword address

Operands

$f2
An even-numbered floating-point register, $f0 to $f30. A double-precision value uses this register and the next odd-numbered register.
imm16
A signed 16-bit immediate, -32768 to 32767.
$t2
Any general-purpose register, $0 to $31, using its numeric or named spelling, such as $8 or $t0 ($zero is $0; $ra is $31).
$f1
Any floating-point register, $f0 to $f31.
label
A named address in the program, such as the start of a loop or a variable in .data.
imm
An immediate value: a signed 16-bit value (-32768 to 32767) or a 32-bit value (-2147483648 to 4294967295). The assembler chooses a supported encoding for the value and other operands; a pseudoinstruction may expand into several instructions.
imm32
A 32-bit immediate, -2147483648 to 4294967295. Pseudoinstruction expansion may overwrite $at, losing its previous value.

Used to store a double-precision float to memory. Address must be doubleword-aligned and $f2 must be even-numbered.

.data
value: .double 0.0
source: .double 3.5
.text
# Store 3.5 into value. Inspect memory at value: 3.5 is stored as IEEE-754 raw bits 0x400C000000000000.
l.d $f2, source
la $t0, value
sdc1 $f2, 0($t0)