# SUBSS
# Subtract Scalar Single-Precision Floating-Point Values
| Opcode | Mnemonic | Description |
|---|---|---|
| F3 0F 5C /r | SUBSS xmm1, xmm2/m32 | Subtract the lower single-precision floating-point values in xmm2/m32 from xmm1. |
# Description
Subtracts the low single-precision floating-point value in the source operand (second operand) from the low single-precision floating-point value in the destination operand (first operand), and stores the single-precision floating-point result in the destination operand. The source operand can be an XMM register or a 32-bit memory location. The destination operand is an XMM register. The three high-order doublewords of the destination operand remain unchanged. See Figure 10-6 in the IA-32 Intel Architecture Software Developer's Manual, Volume 1 for an illustration of a scalar single-precision floating-point operation.
# Operation
Destination[0..31] = Destination[0..31] - Source[0..31];
//Destination[96..127] remains unchanged
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| Instruction | Latency | Throughput | Execution Unit |
|---|---|---|---|
| CPUID | 0F3n/0F2n/069n | 0F3n/0F2n/069n | 0F2n |
| SUBSS xmm, xmm | 5/4/3 | 2/2/1 | FP_ADD |