VCVTPD2QQ (Intel x86/64 assembly instruction)

모두의 코드
VCVTPD2QQ (Intel x86/64 assembly instruction)

작성일 : 2020-09-01 이 글은 496 번 읽혔습니다.

VCVTPD2QQ

Convert Packed Double-Precision Floating-Point Values to Packed Quadword Integers

참고 사항

아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.

Opcode/ Instruction	Op / En	64/32 bit Mode Support	CPUID Feature Flag	Description
`EVEX.128.66.0F.W1 7B /r` VCVTPD2QQ xmm1 {k1}{z} xmm2/m128/m64bcst	FV	V/V	AVX512VL AVX512DQ	Convert two packed double-precision floating-point values from xmm2/m128/m64bcst to two packed quadword integers in xmm1 with writemask k1.
`EVEX.256.66.0F.W1 7B /r` VCVTPD2QQ ymm1 {k1}{z} ymm2/m256/m64bcst	FV	V/V	AVX512VL AVX512DQ	Convert four packed double-precision floating-point values from ymm2/m256/m64bcst to four packed quadword integers in ymm1 with writemask k1.
`EVEX.512.66.0F.W1 7B /r` VCVTPD2QQ zmm1 {k1}{z} zmm2/m512/m64bcst{er}	FV	V/V	AVX512DQ	Convert eight packed double-precision floating-point values from zmm2/m512/m64bcst to eight packed quadword integers in zmm1 with writemask k1.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3 Operand 4

FV ModRM:reg (w) ModRM:r/m (r) NA NA

Description

Converts packed double-precision floating-point values in the source operand (second operand) to packed quad-word integers in the destination operand (first operand).

EVEX encoded versions: The source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operation is a ZMM/YMM/XMM register conditionally updated with writemask k1.

When a conversion is inexact, the value returned is rounded according to the rounding control bits in the MXCSR register or the embedded rounding control bits. If a converted result cannot be represented in the destination format, the floating-point invalid exception is raised, and if this exception is masked, the indefinite integer value (2^w-1 , where w represents the number of bits in the destination format) is returned.

EVEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.

Operation

VCVTPD2QQ (EVEX encoded version) when src operand is a register

(KL, VL) = (2, 128), (4, 256), (8, 512)
IF (VL == 512) AND (EVEX.b == 1) 
    THEN
          SET_RM(EVEX.RC);
    ELSE 
          SET_RM(MXCSR.RM);
FI;
FOR j <-  0 TO KL-1
    i <-  j * 64
    IF k1[j] OR *no writemask*
          THEN DEST[i+63:i] <-
                Convert_Double_Precision_Floating_Point_To_QuadInteger(SRC[i+63:i])
          ELSE 
                IF *merging-masking* ; merging-masking
                      THEN *DEST[i+63:i] remains unchanged*
                      ELSE  ; zeroing-masking
                            DEST[i+63:i] <-  0
                FI
    FI;
ENDFOR
DEST[MAX_VL-1:VL] <-  0

VCVTPD2QQ (EVEX encoded version) when src operand is a memory source

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j <-  0 TO KL-1
    i <-  j * 64
    IF k1[j] OR *no writemask*
          THEN 
                IF (EVEX.b == 1) 
                      THEN
                            DEST[i+63:i] <- Convert_Double_Precision_Floating_Point_To_QuadInteger(SRC[63:0])
                      ELSE 
                            DEST[i+63:i] <-  Convert_Double_Precision_Floating_Point_To_QuadInteger(SRC[i+63:i])
                FI;
          ELSE 
                IF *merging-masking* ; merging-masking
                      THEN *DEST[i+63:i] remains unchanged*
                      ELSE  ; zeroing-masking
                            DEST[i+63:i] <-  0
                FI
    FI;
ENDFOR
DEST[MAX_VL-1:VL] <-  0

Intel C/C++ Compiler Intrinsic Equivalent

VCVTPD2QQ __m512i _mm512_cvtpd_epi64(__m512d a);
VCVTPD2QQ __m512i _mm512_mask_cvtpd_epi64(__m512i s, __mmask8 k, __m512d a);
VCVTPD2QQ __m512i _mm512_maskz_cvtpd_epi64(__mmask8 k, __m512d a);
VCVTPD2QQ __m512i _mm512_cvt_roundpd_epi64(__m512d a, int r);
VCVTPD2QQ __m512i _mm512_mask_cvt_roundpd_epi64(__m512i s, __mmask8 k,
                                                __m512d a, int r);
VCVTPD2QQ __m512i _mm512_maskz_cvt_roundpd_epi64(__mmask8 k, __m512d a, int r);
VCVTPD2QQ __m256i _mm256_mask_cvtpd_epi64(__m256i s, __mmask8 k, __m256d a);
VCVTPD2QQ __m256i _mm256_maskz_cvtpd_epi64(__mmask8 k, __m256d a);
VCVTPD2QQ __m128i _mm_mask_cvtpd_epi64(__m128i s, __mmask8 k, __m128d a);
VCVTPD2QQ __m128i _mm_maskz_cvtpd_epi64(__mmask8 k, __m128d a);
VCVTPD2QQ __m256i _mm256_cvtpd_epi64(__m256d src) VCVTPD2QQ __m128i
    _mm_cvtpd_epi64(__m128d src)

SIMD Floating-Point Exceptions

Invalid, Precision

Other Exceptions

EVEX-encoded instructions, see Exceptions Type E2

#UD If EVEX.vvvv != 1111B.

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모두의 코드 VCVTPD2QQ (Intel x86/64 assembly instruction)