모두의 코드
VCVTPS2QQ (Intel x86/64 assembly instruction)

작성일 : 2020-09-01 이 글은 527 번 읽혔습니다.

VCVTPS2QQ

Convert Packed Single Precision Floating-Point Values to Packed Singed Quadword Integer Values

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.W0 7B /r
VCVTPS2QQ xmm1 {k1}{z} xmm2/m64/m32bcst

HV

V/V

AVX512VL
AVX512DQ

Convert two packed single precision floating-point values from xmm2/m64/m32bcst to two packed signed quadword values in xmm1 subject to writemask k1.

EVEX.256.66.0F.W0 7B /r
VCVTPS2QQ ymm1 {k1}{z} xmm2/m128/m32bcst

HV

V/V

AVX512VL
AVX512DQ

Convert four packed single precision floating-point values from xmm2/m128/m32bcst to four packed signed quadword values in ymm1 subject to writemask k1.

EVEX.512.66.0F.W0 7B /r
VCVTPS2QQ zmm1 {k1}{z} ymm2/m256/m32bcst{er}

HV

V/V

AVX512DQ

Convert eight packed single precision floating-point values from ymm2/m256/m32bcst to eight packed signed quadword values in zmm1 subject to writemask k1.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3 Operand 4

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

Description

Converts eight packed single-precision floating-point values in the source operand to eight signed quadword inte-gers in the destination operand.

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 (2w-1 , where w represents the number of bits in the destination format) is returned.

The source operand is a YMM/XMM/XMM (low 64- bits) register or a 256/128/64-bit memory location. The destina-tion operation is a ZMM/YMM/XMM register conditionally updated with writemask k1.

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

Operation

VCVTPS2QQ (EVEX encoded versions) 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
    k <-  j * 32
    IF k1[j] OR *no writemask*
          THEN DEST[i+63:i] <-
                Convert_Single_Precision_To_QuadInteger(SRC[k+31:k])
          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

VCVTPS2QQ (EVEX encoded versions) when src operand is a memory source

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j <-  0 TO KL-1
    i <-  j * 64
    k <-  j * 32
    IF k1[j] OR *no writemask*
          THEN 
                IF (EVEX.b == 1) 
                      THEN
                            DEST[i+63:i] <-
                Convert_Single_Precision_To_QuadInteger(SRC[31:0])
                      ELSE 
                            DEST[i+63:i] <-
                Convert_Single_Precision_To_QuadInteger(SRC[k+31:k])
                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

VCVTPS2QQ __m512i _mm512_cvtps_epi64(__m512 a);
VCVTPS2QQ __m512i _mm512_mask_cvtps_epi64(__m512i s, __mmask16 k, __m512 a);
VCVTPS2QQ __m512i _mm512_maskz_cvtps_epi64(__mmask16 k, __m512 a);
VCVTPS2QQ __m512i _mm512_cvt_roundps_epi64(__m512 a, int r);
VCVTPS2QQ __m512i _mm512_mask_cvt_roundps_epi64(__m512i s, __mmask16 k,
                                                __m512 a, int r);
VCVTPS2QQ __m512i _mm512_maskz_cvt_roundps_epi64(__mmask16 k, __m512 a, int r);
VCVTPS2QQ __m256i _mm256_cvtps_epi64(__m256 a);
VCVTPS2QQ __m256i _mm256_mask_cvtps_epi64(__m256i s, __mmask8 k, __m256 a);
VCVTPS2QQ __m256i _mm256_maskz_cvtps_epi64(__mmask8 k, __m256 a);
VCVTPS2QQ __m128i _mm_cvtps_epi64(__m128 a);
VCVTPS2QQ __m128i _mm_mask_cvtps_epi64(__m128i s, __mmask8 k, __m128 a);
VCVTPS2QQ __m128i _mm_maskz_cvtps_epi64(__mmask8 k, __m128 a);

SIMD Floating-Point Exceptions

Invalid, Precision

Other Exceptions

EVEX-encoded instructions, see Exceptions Type E3

#UD If EVEX.vvvv != 1111B.

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