모두의 코드
PHMINPOSUW (Intel x86/64 assembly instruction)
PHMINPOSUW
Packed Horizontal Word Minimum
참고 사항
아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.
Opcode/ | Op/ | 64/32 bit | CPUID | Description |
|---|---|---|---|---|
| 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 second-lowest word of xmm1. |
| 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 second-lowest 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). The word index of the minimum value is stored in bits 16-18 of the destination operand. The remaining upper bits of the destination are set to zero.
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.
Operation
PHMINPOSUW (128-bit Legacy SSE version)
INDEX <- 0;
MIN <- SRC[15:0]
IF (SRC[31:16] < MIN)
THEN INDEX <- 1; MIN <- SRC[31:16]; FI;
IF (SRC[47:32] < MIN)
THEN INDEX <- 2; MIN <- SRC[47:32]; FI;
* Repeat operation for words 3 through 6
IF (SRC[127:112] < MIN)
THEN INDEX <- 7; MIN <- SRC[127:112]; FI;
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.
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