모두의 코드
VFNMSUB132PS, VFNMSUB213PS, VFNMSUB231PSs (Intel x86/64 assembly instruction)

작성일 : 2020-09-01 이 글은 554 번 읽혔습니다.

VFNMSUB132PS, VFNMSUB213PS, VFNMSUB231PS

Fused Negative Multiply-Subtract of Packed Single-Precision Floating-Point 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

VEX.NDS.128.66.0F38.W0 9E /r
VFNMSUB132PS xmm1 xmm2 xmm3/m128

RVM

V/V

FMA

Multiply packed single-precision floating-point values from xmm1 and xmm3/mem, negate the multiplication result and subtract xmm2 and put result in xmm1.

VEX.NDS.128.66.0F38.W0 AE /r
VFNMSUB213PS xmm1 xmm2 xmm3/m128

RVM

V/V

FMA

Multiply packed single-precision floating-point values from xmm1 and xmm2, negate the multiplication result and subtract xmm3/mem and put result in xmm1.

VEX.NDS.128.66.0F38.W0 BE /r
VFNMSUB231PS xmm1 xmm2 xmm3/m128

RVM

V/V

FMA

Multiply packed single-precision floating-point values from xmm2 and xmm3/mem, negate the multiplication result and subtract xmm1 and put result in xmm1.

VEX.NDS.256.66.0F38.W0 9E /r
VFNMSUB132PS ymm1 ymm2 ymm3/m256

RVM

V/V

FMA

Multiply packed single-precision floating-point values from ymm1 and ymm3/mem, negate the multiplication result and subtract ymm2 and put result in ymm1.

VEX.NDS.256.66.0F38.W0 AE /r
VFNMSUB213PS ymm1 ymm2 ymm3/m256

RVM

V/V

FMA

Multiply packed single-precision floating-point values from ymm1 and ymm2, negate the multiplication result and subtract ymm3/mem and put result in ymm1.

VEX.NDS.256.66.0F38.0 BE /r
VFNMSUB231PS ymm1 ymm2 ymm3/m256

RVM

V/V

FMA

Multiply packed single-precision floating-point values from ymm2 and ymm3/mem, negate the multiplication result and subtract ymm1 and put result in ymm1.

EVEX.NDS.128.66.0F38.W0 9E /r
VFNMSUB132PS xmm1 {k1}{z} xmm2 xmm3/m128/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from xmm1 and xmm3/m128/m32bcst, negate the multiplication result and subtract xmm2 and put result in xmm1.

EVEX.NDS.128.66.0F38.W0 AE /r
VFNMSUB213PS xmm1 {k1}{z} xmm2 xmm3/m128/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from xmm1 and xmm2, negate the multiplication result and subtract xmm3/m128/m32bcst and put result in xmm1.

EVEX.NDS.128.66.0F38.W0 BE /r
VFNMSUB231PS xmm1 {k1}{z} xmm2 xmm3/m128/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from xmm2 and xmm3/m128/m32bcst, negate the multiplication result subtract add to xmm1 and put result in xmm1.

EVEX.NDS.256.66.0F38.W0 9E /r
VFNMSUB132PS ymm1 {k1}{z} ymm2 ymm3/m256/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from ymm1 and ymm3/m256/m32bcst, negate the multiplication result and subtract ymm2 and put result in ymm1.

EVEX.NDS.256.66.0F38.W0 AE /r
VFNMSUB213PS ymm1 {k1}{z} ymm2 ymm3/m256/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from ymm1 and ymm2, negate the multiplication result and subtract ymm3/m256/m32bcst and put result in ymm1.

EVEX.NDS.256.66.0F38.W0 BE /r
VFNMSUB231PS ymm1 {k1}{z} ymm2 ymm3/m256/m32bcst

FV

V/V

AVX512VL
AVX512F

Multiply packed single-precision floating-point values from ymm2 and ymm3/m256/m32bcst, negate the multiplication result subtract add to ymm1 and put result in ymm1.

EVEX.NDS.512.66.0F38.W0 9E /r
VFNMSUB132PS zmm1 {k1}{z} zmm2 zmm3/m512/m32bcst{er}

FV

V/V

AVX512F

Multiply packed single-precision floating-point values from zmm1 and zmm3/m512/m32bcst, negate the multiplication result and subtract zmm2 and put result in zmm1.

EVEX.NDS.512.66.0F38.W0 AE /r
VFNMSUB213PS zmm1 {k1}{z} zmm2 zmm3/m512/m32bcst{er}

FV

V/V

AVX512F

Multiply packed single-precision floating-point values from zmm1 and zmm2, negate the multiplication result and subtract zmm3/m512/m32bcst and put result in zmm1.

EVEX.NDS.512.66.0F38.W0 BE /r
VFNMSUB231PS zmm1 {k1}{z} zmm2 zmm3/m512/m32bcst{er}

FV

V/V

AVX512F

Multiply packed single-precision floating-point values from zmm2 and zmm3/m512/m32bcst, negate the multiplication result subtract add to zmm1 and put result in zmm1.

Instruction Operand Encoding

Op/En

Operand 1

Operand 2

Operand 3

Operand 4

RVM

ModRM:reg (r, w)

VEX.vvvv (r)

ModRM:r/m (r)

NA

FV

ModRM:reg (r, w)

EVEX.vvvv (r)

ModRM:r/m (r)

NA

Description

VFNMSUB132PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the first source operand to the four, eight or sixteen packed single-precision floating-point values in the third source operand. From negated infinite precision intermediate results, subtracts the four, eight or sixteen packed single-precision floating-point values in the second source operand, performs rounding and stores the resulting four, eight or sixteen packed single-precision floating-point values to the destination operand (first source operand).

VFNMSUB213PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the second source operand to the four, eight or sixteen packed single-precision floating-point values in the first source operand. From negated infinite precision intermediate results, subtracts the four, eight or sixteen packed single-precision floating-point values in the third source operand, performs rounding and stores the resulting four, eight or sixteen packed single-precision floating-point values to the destination operand (first source operand).

VFNMSUB231PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the second source to the four, eight or sixteen packed single-precision floating-point values in the third source operand. From negated infinite precision intermediate results, subtracts the four, eight or sixteen packed single-precision floating-point values in the first source operand, performs rounding and stores the resulting four, eight or sixteen packed single-precision floating-point values to the destination operand (first source operand).

EVEX encoded versions: The destination operand (also first source operand) and the second source operand are ZMM/YMM/XMM register. The third source operand is a ZMM/YMM/XMM register, a 512/256/128-bit memory loca-tion or a 512/256/128-bit vector broadcasted from a 32-bit memory location. The destination operand is condition-ally updated with write mask k1.

VEX.256 encoded version: The destination operand (also first source operand) is a YMM register and encoded in regfield. The second source operand is a YMM register and encoded in VEX.vvvv. The third source operand is a YMM register or a 256-bit memory location and encoded in rmfield.

VEX.128 encoded version: The destination operand (also first source operand) is a XMM register and encoded in regfield. The second source operand is a XMM register and encoded in VEX.vvvv. The third source operand is a XMM register or a 128-bit memory location and encoded in rmfield. The upper 128 bits of the YMM destination register are zeroed.

Operation

VFNMSUB132PS DEST, SRC2, SRC3 (VEX encoded version)

IF (VEX.128) THEN 
    MAXNUM <- 2
ELSEIF (VEX.256)
    MAXNUM <-  4
FI
For i = 0 to MAXNUM-1 {
    n <-  32*i;
    DEST[n+31:n] <-  RoundFPControl_MXCSR( - (DEST[n+31:n]*SRC3[n+31:n]) - SRC2[n+31:n])
}
IF (VEX.128) THEN
    DEST[MAX_VL-1:128] <-  0
ELSEIF (VEX.256)
    DEST[MAX_VL-1:256] <-  0
FI

VFNMSUB213PS DEST, SRC2, SRC3 (VEX encoded version)

IF (VEX.128) THEN 
    MAXNUM <- 2
ELSEIF (VEX.256)
    MAXNUM <-  4
FI
For i = 0 to MAXNUM-1 {
    n <-  32*i;
    DEST[n+31:n] <-  RoundFPControl_MXCSR( - (SRC2[n+31:n]*DEST[n+31:n]) - SRC3[n+31:n])
}
IF (VEX.128) THEN
    DEST[MAX_VL-1:128] <-  0
ELSEIF (VEX.256)
    DEST[MAX_VL-1:256] <-  0
FI

VFNMSUB231PS DEST, SRC2, SRC3 (VEX encoded version)

IF (VEX.128) THEN 
    MAXNUM <- 2
ELSEIF (VEX.256)
    MAXNUM <-  4
FI
For i = 0 to MAXNUM-1 {
    n <-  32*i;
    DEST[n+31:n] <-  RoundFPControl_MXCSR( - (SRC2[n+31:n]*SRC3[n+31:n]) - DEST[n+31:n])
}
IF (VEX.128) THEN
    DEST[MAX_VL-1:128] <-  0
ELSEIF (VEX.256)
    DEST[MAX_VL-1:256] <-  0
FI

VFNMSUB132PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a register)

(KL, VL) = (4, 128), (8, 256), (16, 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 * 32
    IF k1[j] OR *no writemask*
          THEN DEST[i+31:i] <-  
                RoundFPControl(-(DEST[i+31:i]*SRC3[i+31:i]) - SRC2[i+31:i])
          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[MAX_VL-1:VL] <-  0

VFNMSUB132PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a memory source)

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j <-  0 TO KL-1
    i <-  j * 32
    IF k1[j] OR *no writemask*
          THEN 
                IF (EVEX.b = 1) 
                      THEN
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(DEST[i+31:i]*SRC3[31:0]) - SRC2[i+31:i])
                      ELSE 
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(DEST[i+31:i]*SRC3[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[MAX_VL-1:VL] <-  0

VFNMSUB213PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a register)

(KL, VL) = (4, 128), (8, 256), (16, 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 * 32
    IF k1[j] OR *no writemask*
          THEN DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*DEST[i+31:i]) - SRC3[i+31:i])
          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[MAX_VL-1:VL] <-  0

VFNMSUB213PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a memory source)

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j <-  0 TO KL-1
    i <-  j * 32
    IF k1[j] OR *no writemask*
          THEN 
                IF (EVEX.b = 1) 
                      THEN
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*DEST[i+31:i]) - SRC3[31:0])
                      ELSE 
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*DEST[i+31:i]) - SRC3[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[MAX_VL-1:VL] <-  0

VFNMSUB231PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a register)

(KL, VL) = (4, 128), (8, 256), (16, 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 * 32
    IF k1[j] OR *no writemask*
          THEN DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*SRC3[i+31:i]) - DEST[i+31:i])
          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[MAX_VL-1:VL] <-  0

VFNMSUB231PS DEST, SRC2, SRC3 (EVEX encoded version, when src3 operand is a memory source)

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j <-  0 TO KL-1
    i <-  j * 32
    IF k1[j] OR *no writemask*
THEN 
                IF (EVEX.b = 1) 
                      THEN
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*SRC3[31:0]) - DEST[i+31:i])
                      ELSE 
                            DEST[i+31:i] <-  
                RoundFPControl_MXCSR(-(SRC2[i+31:i]*SRC3[i+31:i]) - DEST[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[MAX_VL-1:VL] <-  0

Intel C/C++ Compiler Intrinsic Equivalent

VFNMSUBxxxPS __m512 _mm512_fnmsub_ps(__m512 a, __m512 b, __m512 c);
VFNMSUBxxxPS __m512 _mm512_fnmsub_round_ps(__m512 a, __m512 b, __m512 c, int r);
VFNMSUBxxxPS __m512 _mm512_mask_fnmsub_ps(__m512 a, __mmask16 k, __m512 b,
                                          __m512 c);
VFNMSUBxxxPS __m512 _mm512_maskz_fnmsub_ps(__mmask16 k, __m512 a, __m512 b,
                                           __m512 c);
VFNMSUBxxxPS __m512 _mm512_mask3_fnmsub_ps(__m512 a, __m512 b, __m512 c,
                                           __mmask16 k);
VFNMSUBxxxPS __m512 _mm512_mask_fnmsub_round_ps(__m512 a, __mmask16 k, __m512 b,
                                                __m512 c, int r);
VFNMSUBxxxPS __m512 _mm512_maskz_fnmsub_round_ps(__mmask16 k, __m512 a,
                                                 __m512 b, __m512 c, int r);
VFNMSUBxxxPS __m512 _mm512_mask3_fnmsub_round_ps(__m512 a, __m512 b, __m512 c,
                                                 __mmask16 k, int r);
VFNMSUBxxxPS __m256 _mm256_mask_fnmsub_ps(__m256 a, __mmask8 k, __m256 b,
                                          __m256 c);
VFNMSUBxxxPS __m256 _mm256_maskz_fnmsub_ps(__mmask8 k, __m256 a, __m256 b,
                                           __m256 c);
VFNMSUBxxxPS __m256 _mm256_mask3_fnmsub_ps(__m256 a, __m256 b, __m256 c,
                                           __mmask8 k);
VFNMSUBxxxPS __m128 _mm_mask_fnmsub_ps(__m128 a, __mmask8 k, __m128 b,
                                       __m128 c);
VFNMSUBxxxPS __m128 _mm_maskz_fnmsub_ps(__mmask8 k, __m128 a, __m128 b,
                                        __m128 c);
VFNMSUBxxxPS __m128 _mm_mask3_fnmsub_ps(__m128 a, __m128 b, __m128 c,
                                        __mmask8 k);
VFNMSUBxxxPS __m128 _mm_fnmsub_ps(__m128 a, __m128 b, __m128 c);
VFNMSUBxxxPS __m256 _mm256_fnmsub_ps(__m256 a, __m256 b, __m256 c);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal

Other Exceptions

VEX-encoded instructions, see Exceptions Type 2.

EVEX-encoded instructions, see Exceptions Type E2.

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