pminsw

Minimum of Packed Signed Word Integers

PMINSW xmm1, xmm2/m128

Returns minimum of signed words.

Details

Compares each of 8 packed signed words in the destination and source registers and stores the minimum value of each pair into the destination. This is an element-wise signed 16-bit minimum operation. No flags are affected.

Pseudocode Operation

for i in 0..7:
  dest[i*16 + 15:i*16] ← min_signed(dest[i*16 + 15:i*16], src[i*16 + 15:i*16])

Example

PMINSW xmm1, xmm2/m128

Encoding

Binary Layout
66
+0
0F
+1
EA
+2
 
Format SSE2
Opcode 66 0F EA
Extension SSE2

Operands

  • dest
    XMM
  • src
    XMM/Mem

Reference (Intel® SDM)

Instruction Forms

Opcode Instruction Op/En 64/32-bit Mode CPUID Description
NP 0F EA /r1 PMINSW mm1, mm2/m64 A V/V SSE Compare signed word integers in mm2/m64 and mm1 and return minimum values.
66 0F 38 38 /r PMINSB xmm1, xmm2/m128 A V/V SSE4_1 Compare packed signed byte integers in xmm1 and xmm2/m128 and store packed minimum values in xmm1.
66 0F EA /r PMINSW xmm1, xmm2/m128 A V/V SSE2 Compare packed signed word integers in xmm2/m128 and xmm1 and store packed minimum values in xmm1.
VEX.128.66.0F38 38 /r VPMINSB xmm1, xmm2, xmm3/m128 B V/V AVX Compare packed signed byte integers in xmm2 and xmm3/m128 and store packed minimum values in xmm1.
VEX.128.66.0F EA /r VPMINSW xmm1, xmm2, xmm3/m128 B V/V AVX Compare packed signed word integers in xmm3/m128 and xmm2 and return packed minimum values in xmm1.
VEX.256.66.0F38 38 /r VPMINSB ymm1, ymm2, ymm3/m256 B V/V AVX2 Compare packed signed byte integers in ymm2 and ymm3/m256 and store packed minimum values in ymm1.
VEX.256.66.0F EA /r VPMINSW ymm1, ymm2, ymm3/m256 B V/V AVX2 Compare packed signed word integers in ymm3/m256 and ymm2 and return packed minimum values in ymm1.
EVEX.128.66.0F38.WIG 38 /r VPMINSB xmm1{k1}{z}, xmm2, xmm3/m128 C V/V (AVX512VL AND AVX512BW) OR AVX10.1 Compare packed signed byte integers in xmm2 and xmm3/m128 and store packed minimum values in xmm1 under writemask k1.
EVEX.256.66.0F38.WIG 38 /r VPMINSB ymm1{k1}{z}, ymm2, ymm3/m256 C V/V (AVX512VL AND AVX512BW) OR AVX10.1 Compare packed signed byte integers in ymm2 and ymm3/m256 and store packed minimum values in ymm1 under writemask k1.
EVEX.512.66.0F38.WIG 38 /r VPMINSB zmm1{k1}{z}, zmm2, zmm3/m512 C V/V AVX512BW OR AVX10.1 Compare packed signed byte integers in zmm2 and zmm3/m512 and store packed minimum values in zmm1 under writemask k1.
EVEX.128.66.0F.WIG EA /r VPMINSW xmm1{k1}{z}, xmm2, xmm3/m128 C V/V (AVX512VL AND AVX512BW) OR AVX10.1 Compare packed signed word integers in xmm2 and xmm3/m128 and store packed minimum values in xmm1 under writemask k1.
EVEX.256.66.0F.WIG EA /r VPMINSW ymm1{k1}{z}, ymm2, ymm3/m256 C V/V (AVX512VL AND AVX512BW) OR AVX10.1 Compare packed signed word integers in ymm2 and ymm3/m256 and store packed minimum values in ymm1 under writemask k1.
EVEX.512.66.0F.WIG EA /r VPMINSW zmm1{k1}{z}, zmm2, zmm3/m512 C V/V AVX512BW OR AVX10.1 Compare packed signed word integers in zmm2 and zmm3/m512 and store packed minimum values in zmm1 under writemask k1.

Instruction Operand Encoding

Op/En Tuple Type Operand 1 Operand 2 Operand 3 Operand 4
A N/A ModRM:reg (r, w) ModRM:r/m (r) N/A N/A
B N/A ModRM:reg (w) VEX.vvvv (r) ModRM:r/m (r) N/A
C Full Mem ModRM:reg (w) EVEX.vvvv (r) ModRM:r/m (r) N/A

Description

Performs a SIMD compare of the packed signed byte, word, or dword integers in the second source operand and the first source operand and returns the minimum value for each pair of integers to the destination operand. Legacy SSE version PMINSW: The source operand can be an MMX technology register or a 64-bit memory location. The destination operand can be an MMX technology register. 128-bit Legacy SSE version: The first source and destination operands are XMM registers. The second source operand is an XMM register or a 128-bit memory location. Bits (MAXVL-1:128) of the corresponding destination register remain unchanged. VEX.128 encoded version: The first source and destination operands are XMM registers. The second source operand is an XMM register or a 128-bit memory location. Bits (MAXVL-1:128) of the corresponding destination register are zeroed. VEX.256 encoded version: The second source operand can be an YMM register or a 256-bit memory location. The first source and destination operands are YMM registers. EVEX encoded versions: The first source operand is a ZMM/YMM/XMM register; The second source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operand is conditionally updated based on writemask k1.

Operation

PMINSW (64-bit Operands)
IF DEST[15:0] < SRC[15:0] THEN
DEST[15:0] := DEST[15:0];
ELSE
DEST[15:0] := SRC[15:0]; FI;
(* Repeat operation for 2nd and 3rd words in source and destination operands *)
IF DEST[63:48] < SRC[63:48] THEN
DEST[63:48] := DEST[63:48];
ELSE
DEST[63:48] := SRC[63:48]; FI;

PMINSB (128-bit Legacy SSE Version)
IF DEST[7:0] < SRC[7:0] THEN
DEST[7:0] := DEST[7:0];
ELSE
DEST[15:0] := SRC[7:0]; FI;
(* Repeat operation for 2nd through 15th bytes in source and destination operands *)
IF DEST[127:120] < SRC[127:120] THEN
DEST[127:120] := DEST[127:120];
ELSE
DEST[127:120] := SRC[127:120]; FI;
DEST[MAXVL-1:128] (Unmodified)





PMINSB/PMINSW—Minimum of Packed Signed Integers                                                                                          Vol. 2B 4-333
VPMINSB (VEX.128 Encoded Version)
IF SRC1[7:0] < SRC2[7:0] THEN
DEST[7:0] := SRC1[7:0];
ELSE
DEST[7:0] := SRC2[7:0]; FI;
(* Repeat operation for 2nd through 15th bytes in source and destination operands *)
IF SRC1[127:120] < SRC2[127:120] THEN
DEST[127:120] := SRC1[127:120];
ELSE
DEST[127:120] := SRC2[127:120]; FI;
DEST[MAXVL-1:128] := 0

VPMINSB (VEX.256 Encoded Version)
IF SRC1[7:0] < SRC2[7:0] THEN
DEST[7:0] := SRC1[7:0];
ELSE
DEST[15:0] := SRC2[7:0]; FI;
(* Repeat operation for 2nd through 31st bytes in source and destination operands *)
IF SRC1[255:248] < SRC2[255:248] THEN
DEST[255:248] := SRC1[255:248];
ELSE
DEST[255:248] := SRC2[255:248]; FI;
DEST[MAXVL-1:256] := 0

VPMINSB (EVEX Encoded Versions)
(KL, VL) = (16, 128), (32, 256), (64, 512)
FOR j := 0 TO KL-1
i := j * 8
IF k1[j] OR *no writemask* THEN
IF SRC1[i+7:i] < SRC2[i+7:i]
THEN DEST[i+7:i] := SRC1[i+7:i];
ELSE DEST[i+7:i] := SRC2[i+7:i];
FI;
ELSE
IF *merging-masking*                                 ; merging-masking
THEN *DEST[i+7:i] remains unchanged*
ELSE                                                         ; zeroing-masking
DEST[i+7:i] := 0
FI
FI;
ENDFOR;
DEST[MAXVL-1:VL] := 0

PMINSW (128-bit Legacy SSE Version)
IF DEST[15:0] < SRC[15:0] THEN
DEST[15:0] := DEST[15:0];
ELSE
DEST[15:0] := SRC[15:0]; FI;
(* Repeat operation for 2nd through 7th words in source and destination operands *)
IF DEST[127:112] < SRC[127:112] THEN
DEST[127:112] := DEST[127:112];
ELSE
DEST[127:112] := SRC[127:112]; FI;
DEST[MAXVL-1:128] (Unmodified)


PMINSB/PMINSW—Minimum of Packed Signed Integers                                                                                          Vol. 2B 4-334
VPMINSW (VEX.128 Encoded Version)
IF SRC1[15:0] < SRC2[15:0] THEN
DEST[15:0] := SRC1[15:0];
ELSE
DEST[15:0] := SRC2[15:0]; FI;
(* Repeat operation for 2nd through 7th words in source and destination operands *)
IF SRC1[127:112] < SRC2[127:112] THEN
DEST[127:112] := SRC1[127:112];
ELSE
DEST[127:112] := SRC2[127:112]; FI;
DEST[MAXVL-1:128] := 0

VPMINSW (VEX.256 Encoded Version)
IF SRC1[15:0] < SRC2[15:0] THEN
DEST[15:0] := SRC1[15:0];
ELSE
DEST[15:0] := SRC2[15:0]; FI;
(* Repeat operation for 2nd through 15th words in source and destination operands *)
IF SRC1[255:240] < SRC2[255:240] THEN
DEST[255:240] := SRC1[255:240];
ELSE
DEST[255:240] := SRC2[255:240]; FI;
DEST[MAXVL-1:256] := 0

VPMINSW (EVEX Encoded Versions)
(KL, VL) = (8, 128), (16, 256), (32, 512)
FOR j := 0 TO KL-1
i := j * 16
IF k1[j] OR *no writemask* THEN
IF SRC1[i+15:i] < SRC2[i+15:i]
THEN DEST[i+15:i] := SRC1[i+15:i];
ELSE DEST[i+15:i] := SRC2[i+15:i];
FI;
ELSE
IF *merging-masking*                                 ; merging-masking
THEN *DEST[i+15:i] remains unchanged*
ELSE                                                         ; zeroing-masking
DEST[i+15:i] := 0
FI
FI;
ENDFOR;
DEST[MAXVL-1:VL] := 0





PMINSB/PMINSW—Minimum of Packed Signed Integers                                                                                          Vol. 2B 4-335

Intel C/C++ Compiler Intrinsic Equivalent

VPMINSB __m512i _mm512_min_epi8( __m512i a, __m512i b);
VPMINSB __m512i _mm512_mask_min_epi8(__m512i s, __mmask64 k, __m512i a, __m512i b);
VPMINSB __m512i _mm512_maskz_min_epi8( __mmask64 k, __m512i a, __m512i b);
VPMINSW __m512i _mm512_min_epi16( __m512i a, __m512i b);
VPMINSW __m512i _mm512_mask_min_epi16(__m512i s, __mmask32 k, __m512i a, __m512i b);
VPMINSW __m512i _mm512_maskz_min_epi16( __mmask32 k, __m512i a, __m512i b);
VPMINSB __m256i _mm256_mask_min_epi8(__m256i s, __mmask32 k, __m256i a, __m256i b);
VPMINSB __m256i _mm256_maskz_min_epi8( __mmask32 k, __m256i a, __m256i b);
VPMINSW __m256i _mm256_mask_min_epi16(__m256i s, __mmask16 k, __m256i a, __m256i b);
VPMINSW __m256i _mm256_maskz_min_epi16( __mmask16 k, __m256i a, __m256i b);
VPMINSB __m128i _mm_mask_min_epi8(__m128i s, __mmask16 k, __m128i a, __m128i b);
VPMINSB __m128i _mm_maskz_min_epi8( __mmask16 k, __m128i a, __m128i b);
VPMINSW __m128i _mm_mask_min_epi16(__m128i s, __mmask8 k, __m128i a, __m128i b);
VPMINSW __m128i _mm_maskz_min_epi16( __mmask8 k, __m128i a, __m128i b);
(V)PMINSB __m128i _mm_min_epi8 ( __m128i a, __m128i b);
(V)PMINSW __m128i _mm_min_epi16 ( __m128i a, __m128i b)
VPMINSB __m256i _mm256_min_epi8 ( __m256i a, __m256i b);
VPMINSW __m256i _mm256_min_epi16 ( __m256i a, __m256i b)
PMINSW__m64 _mm_min_pi16 (__m64 a, __m64 b)

Exceptions

SIMD Floating-Point Exceptions

None.

Other Exceptions

Non-EVEX-encoded instruction, see Table 2-21, “Type 4 Class Exception Conditions.” EVEX-encoded instruction, see Exceptions Type E4.nb in Table 2-51, “Type E4 Class Exception Conditions.” Additionally: #MF (64-bit operations only) If there is a pending x87 FPU exception. PMINSB/PMINSW—Minimum of Packed Signed Integers Vol. 2B 4-336