VFMSUB132PS, VFMSUB213PS, VFMSUB231PS

Fused Multiply-Subtract of Packed Single

stableVMJITAOTinstruction

Encodings

Opcode	Instruction	Op/En	64-bit	Compat/Legacy	Description
`VEX.128.66.0F38.W0 9A /r`	`VFMSUB132PS xmm1, xmm2, xmm3/m128`	A	Valid	Valid	Multiply packed single precision floating-point values from xmm1 and xmm3/mem, subtract xmm2 and put result in xmm1.
`VEX.128.66.0F38.W0 AA /r`	`VFMSUB213PS xmm1, xmm2, xmm3/m128`	A	Valid	Valid	Multiply packed single precision floating-point values from xmm1 and xmm2, subtract xmm3/mem and put result in xmm1.
`VEX.128.66.0F38.W0 BA /r`	`VFMSUB231PS xmm1, xmm2, xmm3/m128`	A	Valid	Valid	Multiply packed single precision floating-point values from xmm2 and xmm3/mem, subtract xmm1 and put result in xmm1.
`VEX.256.66.0F38.W0 9A /r`	`VFMSUB132PS ymm1, ymm2, ymm3/m256`	A	Valid	Valid	Multiply packed single precision floating-point values from ymm1 and ymm3/mem, subtract ymm2 and put result in ymm1.
`VEX.256.66.0F38.W0 AA /r`	`VFMSUB213PS ymm1, ymm2, ymm3/m256`	A	Valid	Valid	Multiply packed single precision floating-point values from ymm1 and ymm2, subtract ymm3/mem and put result in ymm1.
`VEX.256.66.0F38.0 BA /r`	`VFMSUB231PS ymm1, ymm2, ymm3/m256`	A	Valid	Valid	Multiply packed single precision floating-point values from ymm2 and ymm3/mem, subtract ymm1 and put result in ymm1.
`EVEX.128.66.0F38.W0 9A /r`	`VFMSUB132PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from xmm1 and xmm3/m128/m32bcst, AVX10.1 subtract xmm2 and put result in xmm1.
`EVEX.128.66.0F38.W0 AA /r`	`VFMSUB213PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from xmm1 and xmm2, subtract AVX10.1 xmm3/m128/m32bcst and put result in xmm1.
`EVEX.128.66.0F38.W0 BA /r`	`VFMSUB231PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from xmm2 and xmm3/m128/m32bcst, AVX10.1 subtract xmm1 and put result in xmm1.
`EVEX.256.66.0F38.W0 9A /r`	`VFMSUB132PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from ymm1 and ymm3/m256/m32bcst, AVX10.1 subtract ymm2 and put result in ymm1.
`EVEX.256.66.0F38.W0 AA /r`	`VFMSUB213PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from ymm1 and ymm2, subtract AVX10.1 ymm3/m256/m32bcst and put result in ymm1.
`EVEX.256.66.0F38.W0 BA /r`	`VFMSUB231PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst`	B	Valid	Valid	Multiply packed single precision floating-point AVX512F) OR values from ymm2 and ymm3/m256/m32bcst, AVX10.1 subtract ymm1 and put result in ymm1.
`EVEX.512.66.0F38.W0 9A /r`	`VFMSUB132PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}`	B	Valid	Valid	Multiply packed single precision floating-point AVX10.1 values from zmm1 and zmm3/m512/m32bcst, subtract zmm2 and put result in zmm1.
`EVEX.512.66.0F38.W0 AA /r`	`VFMSUB213PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}`	B	Valid	Valid	Multiply packed single precision floating-point AVX10.1 values from zmm1 and zmm2, subtract zmm3/m512/m32bcst and put result in zmm1.
`EVEX.512.66.0F38.W0 BA /r`	`VFMSUB231PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}`	B	Valid	Valid	Multiply packed single precision floating-point AVX10.1 values from zmm2 and zmm3/m512/m32bcst, subtract zmm1 and put result in zmm1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
vex.vvvv lecturaVEX prefix, vvvv field (inverted)
modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

B

modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

Tupla: Full

Measured cost

Loading measurements from arch-data...

Description

Performs a set of SIMD multiply-subtract computation on packed single precision floating-point values using three source operands and writes the multiply-subtract results in the destination operand. The destination operand is also the first source operand. The second operand must be a SIMD register. The third source operand can be a SIMD register or a memory location.

VFMSUB132PS: 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 the infinite precision intermediate result, 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).

VFMSUB213PS: 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 the infinite precision intermediate result, 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).

VFMSUB231PS: 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 the infinite precision intermediate result, 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 location or a 512/256/128-bit vector broadcasted from a 32-bit memory location. The destination operand is conditionally updated with write mask k1.

VEX.256 encoded version: The destination operand (also first source operand) is a YMM register and encoded in reg_field. 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 rm_field.

VEX.128 encoded version: The destination operand (also first source operand) is a XMM register and encoded in reg_field. 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 rm_field. The upper 128 bits of the YMM destination register are zeroed.

Operation

In the operations below, "*" and "-" symbols represent multiplication and subtraction with infinite precision inputs and outputs (no
rounding).


VFMSUB132PS 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[MAXVL-1:128] := 0
ELSEIF (VEX.256)
    DEST[MAXVL-1:256] := 0
FI

VFMSUB213PS 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[MAXVL-1:128] := 0
ELSEIF (VEX.256)
    DEST[MAXVL-1:256] := 0
FI

VFMSUB231PS 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[MAXVL-1:128] := 0
ELSEIF (VEX.256)
    DEST[MAXVL-1:256] := 0
FI


VFMSUB132PS 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_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 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[MAXVL-1:VL] := 0

VFMSUB132PS 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[MAXVL-1:VL] := 0


VFMSUB213PS 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_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 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[MAXVL-1:VL] := 0

VFMSUB213PS 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[MAXVL-1:VL] := 0


VFMSUB231PS 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_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 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[MAXVL-1:VL] := 0

VFMSUB231PS 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[MAXVL-1:VL] := 0

Intel C/C++ compiler intrinsics

VFMSUBxxxPS __m512 _mm512_fmsub_ps(__m512 a, __m512 b, __m512 c);
VFMSUBxxxPS __m512 _mm512_fmsub_round_ps(__m512 a, __m512 b, __m512 c, int r);
VFMSUBxxxPS __m512 _mm512_mask_fmsub_ps(__m512 a, __mmask16 k, __m512 b, __m512 c);
VFMSUBxxxPS __m512 _mm512_maskz_fmsub_ps(__mmask16 k, __m512 a, __m512 b, __m512 c);
VFMSUBxxxPS __m512 _mm512_mask3_fmsub_ps(__m512 a, __m512 b, __m512 c, __mmask16 k);
VFMSUBxxxPS __m512 _mm512_mask_fmsub_round_ps(__m512 a, __mmask16 k, __m512 b, __m512 c, int r);
VFMSUBxxxPS __m512 _mm512_maskz_fmsub_round_ps(__mmask16 k, __m512 a, __m512 b, __m512 c, int r);
VFMSUBxxxPS __m512 _mm512_mask3_fmsub_round_ps(__m512 a, __m512 b, __m512 c, __mmask16 k, int r);
VFMSUBxxxPS __m256 _mm256_mask_fmsub_ps(__m256 a, __mmask8 k, __m256 b, __m256 c);
VFMSUBxxxPS __m256 _mm256_maskz_fmsub_ps(__mmask8 k, __m256 a, __m256 b, __m256 c);
VFMSUBxxxPS __m256 _mm256_mask3_fmsub_ps(__m256 a, __m256 b, __m256 c, __mmask8 k);
VFMSUBxxxPS __m128 _mm_mask_fmsub_ps(__m128 a, __mmask8 k, __m128 b, __m128 c);
VFMSUBxxxPS __m128 _mm_maskz_fmsub_ps(__mmask8 k, __m128 a, __m128 b, __m128 c);
VFMSUBxxxPS __m128 _mm_mask3_fmsub_ps(__m128 a, __m128 b, __m128 c, __mmask8 k);
VFMSUBxxxPS __m128 _mm_fmsub_ps (__m128 a, __m128 b, __m128 c);
VFMSUBxxxPS __m256 _mm256_fmsub_ps (__m256 a, __m256 b, __m256 c);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal.

Other Exceptions

VEX-encoded instructions, see Table 2-19, "Type 2 Class Exception Conditions."

EVEX-encoded instructions, see Table 2-48, "Type E2 Class Exception Conditions."

VFMSUB132PS, VFMSUB213PS, VFMSUB231PS

Encodings

Operand encoding

A

B

Measured cost

Description#

Operation#

Intel C/C++ compiler intrinsics#

SIMD Floating-Point Exceptions#

Other Exceptions#

Sources

Description

Operation

Intel C/C++ compiler intrinsics

SIMD Floating-Point Exceptions

Other Exceptions