| Opcode/Instruction | Op/En | 64/32-bit Mode | CPUID Feature Flag | Description |
|---|---|---|---|---|
|
0F 50 /r MOVMSKPS reg, xmm |
RM | V/V | SSE | Extract 4-bit sign mask from xmm and store in reg. The upper bits of r32 or r64 are filled with zeros. |
|
VEX.128.0F.WIG 50 /r VMOVMSKPS reg, xmm2 |
RM | V/V | AVX | Extract 4-bit sign mask from xmm2 and store in reg. The upper bits of r32 or r64 are zeroed. |
|
VEX.256.0F.WIG 50 /r VMOVMSKPS reg, ymm2 |
RM | V/V | AVX | Extract 8-bit sign mask from ymm2 and store in reg. The upper bits of r32 or r64 are zeroed. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| RM | ModRM:reg (w) | ModRM:r/m (r) | NA | NA |
Extracts the sign bits from the packed single-precision floating-point values in the source operand (second operand), formats them into a 4- or 8-bit mask, and stores the mask in the destination operand (first operand). The source operand is an XMM or YMM register, and the destination operand is a general-purpose register. The mask is stored in the 4 or 8 low-order bits of the destination operand. The upper bits of the destination operand beyond the mask are filled with zeros.
In 64-bit mode, the instruction can access additional registers (XMM8-XMM15, R8-R15) when used with a REX.R prefix. The default operand size is 64-bit in 64-bit mode.
128-bit versions: The source operand is a YMM register. The destination operand is a general purpose register.
VEX.256 encoded version: The source operand is a YMM register. The destination operand is a general purpose register.
Note: In VEX-encoded versions, VEX.vvvv is reserved and must be 1111b, otherwise instructions will #UD.
DEST[0] ← SRC[31];
DEST[1] ← SRC[63];
DEST[2] ← SRC[95];
DEST[3] ← SRC[127];
IF DEST = r32
THEN DEST[31:4] ← ZeroExtend;
ELSE DEST[63:4] ← ZeroExtend;
FI;
1.
ModRM.MOD = 011B required
(V)MOVMSKPS (128-bit version)
DEST[0] (cid:197) SRC[31]
DEST[1] (cid:197) SRC[63]
DEST[2] (cid:197) SRC[95]
DEST[3] (cid:197) SRC[127]
IF DEST = r32
THEN DEST[31:4] (cid:197) 0;
ELSE DEST[63:4] (cid:197) 0;
FI
VMOVMSKPS (VEX.256 encoded version)
DEST[0] (cid:197) SRC[31]
DEST[1] (cid:197) SRC[63]
DEST[2] (cid:197) SRC[95]
DEST[3] (cid:197) SRC[127]
DEST[4] (cid:197) SRC[159]
DEST[5] (cid:197) SRC[191]
DEST[6] (cid:197) SRC[223]
DEST[7] (cid:197) SRC[255]
IF DEST = r32
THEN DEST[31:8] (cid:197) 0;
ELSE DEST[63:8] (cid:197) 0;
FI
int _mm_movemask_ps(__m128 a)
int _mm256_movemask_ps(__m256 a)
None.
See Exceptions Type 7; additionally
| #UD | If VEX.vvvv ≠ 1111B. |