MULPS—Multiply Packed Single-Precision Floating-Point Values

Opcode/Instruction Op /En 64/32 bit Mode Support CPUID Feature Flag Description
NP 0F 59 /r MULPS xmm1, xmm2/m128 A V/V SSE Multiply packed single-precision floating-point values in xmm2/m128 with xmm1 and store result in xmm1.
VEX.128.0F.WIG 59 /r VMULPS xmm1,xmm2, xmm3/m128 B V/V AVX Multiply packed single-precision floating-point values in xmm3/m128 with xmm2 and store result in xmm1.
VEX.256.0F.WIG 59 /r VMULPS ymm1, ymm2, ymm3/m256 B V/V AVX Multiply packed single-precision floating-point values in ymm3/m256 with ymm2 and store result in ymm1.
EVEX.128.0F.W0 59 /r VMULPS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst C V/V AVX512VL AVX512F Multiply packed single-precision floating-point values from xmm3/m128/m32bcst to xmm2 and store result in xmm1.
EVEX.256.0F.W0 59 /r VMULPS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst C V/V AVX512VL AVX512F Multiply packed single-precision floating-point values from ymm3/m256/m32bcst to ymm2 and store result in ymm1.
EVEX.512.0F.W0 59 /r VMULPS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst {er} C V/V AVX512F Multiply packed single-precision floating-point values in zmm3/m512/m32bcst with zmm2 and store result in zmm1.

Instruction Operand Encoding

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

Description

Multiply the packed single-precision floating-point values from the first source operand with the corresponding values in the second source operand, and stores the packed double-precision floating-point results in the destina-tion operand.

EVEX encoded versions: The first source operand (the second operand) is a ZMM/YMM/XMM register. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location or a 512/256/128-bit vector broadcasted from a 32-bit memory location. The destination operand is a ZMM/YMM/XMM register conditionally updated with writemask k1.

VEX.256 encoded version: The first source operand is a YMM register. The second source operand can be a YMM register or a 256-bit memory location. The destination operand is a YMM register. Bits (MAXVL-1:256) of the corre-sponding destination ZMM register are zeroed.

VEX.128 encoded version: The first source operand is a XMM register. The second source operand can be a XMM register or a 128-bit memory location. The destination operand is a XMM register. The upper bits (MAXVL-1:128) of the destination YMM register destination are zeroed.

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The desti-nation is not distinct from the first source XMM register and the upper bits (MAXVL-1:128) of the corresponding ZMM register destination are unmodified.

Operation

VMULPS (EVEX encoded version)

(KL, VL) = (4, 128), (8, 256), (16, 512)

IF (VL = 512) AND (EVEX.b = 1) AND SRC2 *is a register*

THEN

SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

ELSE

SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

FOR j := 0 TO KL-1

i := j * 32

IF k1[j] OR *no writemask*

THEN

IF (EVEX.b = 1) AND (SRC2 *is memory*)

THEN

DEST[i+31:i] := SRC1[i+31:i] * SRC2[31:0]

ELSE

DEST[i+31:i] := SRC1[i+31:i] * SRC2[i+31:i]

FI;

ELSE

IF *merging-masking*

; merging-masking

THEN *DEST[i+31:i] remains unchanged*

ELSE

; zeroing-masking

DEST[i+31:i] := 0

FI

FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VMULPS (VEX.256 encoded version)

DEST[31:0] := SRC1[31:0] * SRC2[31:0]

DEST[63:32] := SRC1[63:32] * SRC2[63:32]

DEST[95:64] := SRC1[95:64] * SRC2[95:64]

DEST[127:96] := SRC1[127:96] * SRC2[127:96]

DEST[159:128] := SRC1[159:128] * SRC2[159:128]

DEST[191:160] := SRC1[191:160] * SRC2[191:160]

DEST[223:192] := SRC1[223:192] * SRC2[223:192]

DEST[255:224] := SRC1[255:224] * SRC2[255:224].

DEST[MAXVL-1:256] := 0;

VMULPS (VEX.128 encoded version)

DEST[31:0] := SRC1[31:0] * SRC2[31:0]

DEST[63:32] := SRC1[63:32] * SRC2[63:32]

DEST[95:64] := SRC1[95:64] * SRC2[95:64]

DEST[127:96] := SRC1[127:96] * SRC2[127:96]

DEST[MAXVL-1:128] := 0

MULPS (128-bit Legacy SSE version)

DEST[31:0] := SRC1[31:0] * SRC2[31:0]

DEST[63:32] := SRC1[63:32] * SRC2[63:32]

DEST[95:64] := SRC1[95:64] * SRC2[95:64]

DEST[127:96] := SRC1[127:96] * SRC2[127:96]

DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ Compiler Intrinsic Equivalent

VMULPS __m512 _mm512_mul_ps( __m512 a, __m512 b);

VMULPS __m512 _mm512_mask_mul_ps(__m512 s, __mmask16 k, __m512 a, __m512 b);

VMULPS __m512 _mm512_maskz_mul_ps(__mmask16 k, __m512 a, __m512 b);

VMULPS __m512 _mm512_mul_round_ps( __m512 a, __m512 b, int);

VMULPS __m512 _mm512_mask_mul_round_ps(__m512 s, __mmask16 k, __m512 a, __m512 b, int);

VMULPS __m512 _mm512_maskz_mul_round_ps(__mmask16 k, __m512 a, __m512 b, int);

VMULPS __m256 _mm256_mask_mul_ps(__m256 s, __mmask8 k, __m256 a, __m256 b);

VMULPS __m256 _mm256_maskz_mul_ps(__mmask8 k, __m256 a, __m256 b);

VMULPS __m128 _mm_mask_mul_ps(__m128 s, __mmask8 k, __m128 a, __m128 b);

VMULPS __m128 _mm_maskz_mul_ps(__mmask8 k, __m128 a, __m128 b);

VMULPS __m256 _mm256_mul_ps (__m256 a, __m256 b);

MULPS __m128 _mm_mul_ps (__m128 a, __m128 b);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal

Other Exceptions

Non-EVEX-encoded instruction, see Table 2-19, “Type 2 Class Exception Conditions”.

EVEX-encoded instruction, see Table 2-46, “Type E2 Class Exception Conditions”.