| Opcode/Instruction | Op /En | 64/32 bit Mode Support | CPUID Feature Flag | Description |
|---|---|---|---|---|
|
EVEX.128.0F.W1 5B /r VCVTQQ2PS xmm1 {k1}{z}, xmm2/m128/m64bcst |
FV | V/V |
AVX512VL AVX512DQ |
Convert two packed quadword integers from xmm2/mem to packed single-precision floating-point values in xmm1 with writemask k1. |
|
EVEX.256.0F.W1 5B /r VCVTQQ2PS xmm1 {k1}{z}, ymm2/m256/m64bcst |
FV | V/V |
AVX512VL AVX512DQ |
Convert four packed quadword integers from ymm2/mem to packed single-precision floating-point values in xmm1 with writemask k1. |
|
EVEX.512.0F.W1 5B /r VCVTQQ2PS ymm1 {k1}{z}, zmm2/m512/m64bcst{er} |
FV | V/V | AVX512DQ | Convert eight packed quadword integers from zmm2/mem to eight packed single-precision floating-point values in ymm1 with writemask k1. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| FV | ModRM:reg (w) | ModRM:r/m (r) | NA | NA |
Description
Converts packed quadword integers in the source operand (second operand) to packed single-precision floating-point values in the destination operand (first operand).
The source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operation is a YMM/XMM/XMM (lower 64 bits) register conditionally updated with writemask k1.
EVEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.
Operation
VCVTQQ2PS (EVEX encoded versions) when src operand is a register
(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
i (cid:197) j * 64
k (cid:197) j * 32
IF k1[j] OR *no writemask*
THEN DEST[k+31:k] (cid:197)
Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[i+63:i])
ELSE
IF *merging-masking*
; merging-masking
THEN *DEST[k+31:k] remains unchanged*
ELSE
; zeroing-masking
DEST[k+31:k] (cid:197) 0
FI
FI;
ENDFOR
DEST[MAX_VL-1:VL/2] (cid:197) 0
VCVTQQ2PS (EVEX encoded versions) when src operand is a memory source
(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
i (cid:197) j * 64
k (cid:197) j * 32
IF k1[j] OR *no writemask*
THEN
IF (EVEX.b == 1)
THEN
DEST[k+31:k] (cid:197)
Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[63:0])
ELSE
DEST[k+31:k] (cid:197)
Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[i+63:i])
FI;
ELSE
IF *merging-masking*
; merging-masking
THEN *DEST[k+31:k] remains unchanged*
ELSE
; zeroing-masking
DEST[k+31:k] (cid:197) 0
FI
FI;
ENDFOR
DEST[MAX_VL-1:VL/2] (cid:197) 0
Intel C/C++ Compiler Intrinsic Equivalent
VCVTQQ2PS __m256 _mm512_cvtepi64_ps( __m512i a);
VCVTQQ2PS __m256 _mm512_mask_cvtepi64_ps( __m256 s, __mmask16 k, __m512i a);
VCVTQQ2PS __m256 _mm512_maskz_cvtepi64_ps( __mmask16 k, __m512i a);
VCVTQQ2PS __m256 _mm512_cvt_roundepi64_ps( __m512i a, int r);
VCVTQQ2PS __m256 _mm512_mask_cvt_roundepi_ps( __m256 s, __mmask8 k, __m512i a, int r);
VCVTQQ2PS __m256 _mm512_maskz_cvt_roundepi64_ps( __mmask8 k, __m512i a, int r);
VCVTQQ2PS __m128 _mm256_cvtepi64_ps( __m256i a);
VCVTQQ2PS __m128 _mm256_mask_cvtepi64_ps( __m128 s, __mmask8 k, __m256i a);
VCVTQQ2PS __m128 _mm256_maskz_cvtepi64_ps( __mmask8 k, __m256i a);
VCVTQQ2PS __m128 _mm_cvtepi64_ps( __m128i a);
VCVTQQ2PS __m128 _mm_mask_cvtepi64_ps( __m128 s, __mmask8 k, __m128i a);
VCVTQQ2PS __m128 _mm_maskz_cvtepi64_ps( __mmask8 k, __m128i a);
SIMD Floating-Point Exceptions
Precision
Other Exceptions
| EVEX-encoded instructions, see Exceptions Type E2 |
| If EVEX.vvvv != 1111B. |