x86 Instruction Set Reference

MULPS

Multiply Packed Single-Precision Floating-Point Values

Opcode	Mnemonic	Description
`0F 59 /r`	`MULPS xmm1, xmm2/m128`	Multiply packed single-precision floating-point values in xmm2/mem by xmm1.

Description
Performs an SIMD multiply of the four packed single-precision floating-point values from the source operand (second operand) and the destination operand (first operand), and stores the packed single-precision floating-point results in the destination operand. The source operand can be an XMM register or a 128-bit memory location. The destination operand is an XMM register. See Figure 10-5 in the IA-32 Intel Architecture Software Developer's Manual, Volume 1 for an illustration of an SIMD single-precision floating-point operation.

Description

Performs an SIMD multiply of the four packed single-precision floating-point values from the source operand (second operand) and the destination operand (first operand), and stores the packed single-precision floating-point results in the destination operand. The source operand can be an XMM register or a 128-bit memory location. The destination operand is an XMM register. See Figure 10-5 in the IA-32 Intel Architecture Software Developer's Manual, Volume 1 for an illustration of an SIMD single-precision floating-point operation.

Operation
Destination[0..31] = Destination[0..31] * Source[0..31]; Destination[32..63] = Destination[32..63] * Source[32..63]; Destination[64..95] = Destination[64..95] * Source[64..95]; Destination[96..127] = Destination[96..127] * Source[96..127];

Operation

Destination[0..31] = Destination[0..31] * Source[0..31];
Destination[32..63] = Destination[32..63] * Source[32..63];
Destination[64..95] = Destination[64..95] * Source[64..95];
Destination[96..127] = Destination[96..127] * Source[96..127];

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal.

Protected Mode Exceptions

`#GP(0)`	For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
`#GP(0)`	For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
`#SS(0)`	For an illegal address in the SS segment.
`#PF(fault-code)`	For a page fault.
`#NM`	If TS in CR0 is set.
`#XM`	If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.

Real-Address Mode Exceptions

`#GP(0)`	If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
`#GP(0)`	If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
`#NM`	If TS in CR0 is set.
`#XM`	If an unmasked SIMD floating-point exception and OSXMMEXCPT in CR4 is 1.

Virtual-8086 Mode Exceptions

Same exceptions as in Real Address Mode

#PF(fault-code) For a page fault.

Instruction	Latency	Throughput	Execution Unit
`CPUID`	0F3n/0F2n/069n	0F3n/0F2n/069n	0F2n
`MULPS xmm, xmm`	7/6/4+1	2/2/2	FP_MUL