DIVPS—Divide Packed Single-Precision Floating-Point Values

Opcode/Instruction Op /En 64/32 bit Mode Support CPUID Feature Flag Description
NP 0F 5E /r DIVPS xmm1, xmm2/m128 A V/V SSE Divide packed single-precision floating-point values in xmm1 by packed single-precision floating-point values in xmm2/mem.
VEX.128.0F.WIG 5E /r VDIVPS xmm1, xmm2, xmm3/m128 B V/V AVX Divide packed single-precision floating-point values in xmm2 by packed single-precision floating-point values in xmm3/mem.
VEX.256.0F.WIG 5E /r VDIVPS ymm1, ymm2, ymm3/m256 B V/V AVX Divide packed single-precision floating-point values in ymm2 by packed single-precision floating-point values in ymm3/mem.
EVEX.128.0F.W0 5E /r VDIVPS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst C V/V AVX512VL AVX512F Divide packed single-precision floating-point values in xmm2 by packed single-precision floating-point values in xmm3/m128/m32bcst and write results to xmm1 subject to writemask k1.
EVEX.256.0F.W0 5E /r VDIVPS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst C V/V AVX512VL AVX512F Divide packed single-precision floating-point values in ymm2 by packed single-precision floating-point values in ymm3/m256/m32bcst and write results to ymm1 subject to writemask k1.
EVEX.512.0F.W0 5E /r VDIVPS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er} C V/V AVX512F Divide packed single-precision floating-point values in zmm2 by packed single-precision floating-point values in zmm3/m512/m32bcst and write results to zmm1 subject to writemask k1.

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

Performs a SIMD divide of the four, eight or sixteen packed single-precision floating-point values in the first source operand (the second operand) by the four, eight or sixteen packed single-precision floating-point values in the second source operand (the third operand). Results are written to the destination operand (the first 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.

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 corresponding ZMM 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

VDIVPS (EVEX encoded versions)

(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

VDIVPS (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;

VDIVPS (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

DIVPS (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

VDIVPS __m512 _mm512_div_ps( __m512 a, __m512 b);

VDIVPS __m512 _mm512_mask_div_ps(__m512 s, __mmask16 k, __m512 a, __m512 b);

VDIVPS __m512 _mm512_maskz_div_ps(__mmask16 k, __m512 a, __m512 b);

VDIVPD __m256d _mm256_mask_div_pd(__m256d s, __mmask8 k, __m256d a, __m256d b);

VDIVPD __m256d _mm256_maskz_div_pd( __mmask8 k, __m256d a, __m256d b);

VDIVPD __m128d _mm_mask_div_pd(__m128d s, __mmask8 k, __m128d a, __m128d b);

VDIVPD __m128d _mm_maskz_div_pd( __mmask8 k, __m128d a, __m128d b);

VDIVPS __m512 _mm512_div_round_ps( __m512 a, __m512 b, int);

VDIVPS __m512 _mm512_mask_div_round_ps(__m512 s, __mmask16 k, __m512 a, __m512 b, int);

VDIVPS __m512 _mm512_maskz_div_round_ps(__mmask16 k, __m512 a, __m512 b, int);

VDIVPS __m256 _mm256_div_ps (__m256 a, __m256 b);

DIVPS __m128 _mm_div_ps (__m128 a, __m128 b);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Divide-by-Zero, Precision, Denormal

Other Exceptions

VEX-encoded instructions, see Table 2-19, “Type 2 Class Exception Conditions”.
EVEX-encoded instructions, see Table 2-46, “Type E2 Class Exception Conditions”.