PHMINPOSUW — Packed Horizontal Word Minimum
| Opcode/Instruction |
Op/En |
64/32 bit Mode Support |
CPUID Feature Flag |
Description |
| 66 0F 38 41 /r PHMINPOSUW xmm1, xmm2/m128 |
RM |
V/V |
SSE4_1 |
Find the minimum unsigned word in xmm2/m128 and place its value in the low word of xmm1 and its index in the secondlowest word of xmm1. |
| VEX.128.66.0F38.WIG 41 /r VPHMINPOSUW xmm1, xmm2/m128 |
RM |
V/V |
AVX |
Find the minimum unsigned word in xmm2/m128 and place its value in the low word of xmm1 and its index in the secondlowest word of xmm1. |
Instruction Operand Encoding
| Op/En |
Operand 1 |
Operand 2 |
Operand 3 |
Operand 4 |
| RM |
ModRM:reg (w) |
ModRM:r/m (r) |
NA |
NA |
Description
Determine the minimum unsigned word value in the source operand (second operand) and place the unsigned
| word in the low word (bits 0-15) of the destination operand (first operand). is stored in bits 16-18 of the destination operand. 128-bit Legacy SSE version: Bits (VLMAX-1:128) of the corresponding YMM destination register remain unchanged. VEX.128 encoded version: Bits (VLMAX-1:128) of the destination YMM register are zeroed. VEX.vvvv is reserved and must be 1111b, VEX.L must be 0, otherwise the instruction will #UD. |
The word index of the minimum value The remaining upper bits of the destination are set to zero. |
Operation
PHMINPOSUW (128-bit Legacy SSE version)
INDEX ← 0;
MIN ← SRC[15:0]
IF (SRC[31:16] < MIN)
THEN INDEX ← 1;
IF (SRC[47:32] < MIN)
THEN INDEX ← 2;
* Repeat operation for words 3 through 6
IF (SRC[127:112] < MIN)
THEN INDEX ← 7;
DEST[15:0] ← MIN;
DEST[18:16] ← INDEX;
DEST[127:19] ← 0000000000000000000000000000H;
VPHMINPOSUW (VEX.128 encoded version)
INDEX ← 0
MIN ← SRC[15:0]
IF (SRC[31:16] < MIN) THEN INDEX ← 1; MIN ← SRC[31:16]
IF (SRC[47:32] < MIN) THEN INDEX ← 2; MIN ← SRC[47:32]
* Repeat operation for words 3 through 6
IF (SRC[127:112] < MIN) THEN INDEX ← 7; MIN ← SRC[127:112]
DEST[15:0] ← MIN
DEST[18:16] ← INDEX
DEST[127:19] ← 0000000000000000000000000000H
DEST[VLMAX-1:128] ← 0
Intel C/C++ Compiler Intrinsic Equivalent
| PHMINPOSUW: |
__m128i _mm_minpos_epu16( __m128i packed_words); |
Flags Affected
None.
SIMD Floating-Point Exceptions
None.
Other Exceptions
See Exceptions Type 4; additionally
| #UD |
If VEX.L = 1. If VEX.vvvv != 1111B. |