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Source code

VFMADD132SD, VFMADD213SD, VFMADD231SD

Fused Multiply-Add of Scalar Double

stableVMJITAOTinstruction

Encodings

OpcodeInstructionOp/En64-bitCompat/LegacyDescription
VEX.LIG.66.0F38.W1 99 /rVFMADD132SD xmm1, xmm2, xmm3/m64AValidValidMultiply scalar double precision floating-point value from xmm1 and xmm3/m64, add to xmm2 and put result in xmm1.
VEX.LIG.66.0F38.W1 A9 /rVFMADD213SD xmm1, xmm2, xmm3/m64AValidValidMultiply scalar double precision floating-point value from xmm1 and xmm2, add to xmm3/m64 and put result in xmm1.
VEX.LIG.66.0F38.W1 B9 /rVFMADD231SD xmm1, xmm2, xmm3/m64AValidValidMultiply scalar double precision floating-point value from xmm2 and xmm3/m64, add to xmm1 and put result in xmm1.
EVEX.LLIG.66.0F38.W1 99 /rVFMADD132SD xmm1 {k1}{z}, xmm2, xmm3/m64{er}BValidValidMultiply scalar double precision floating-point OR AVX10.1 value from xmm1 and xmm3/m64, add to xmm2 and put result in xmm1.
EVEX.LLIG.66.0F38.W1 A9 /rVFMADD213SD xmm1 {k1}{z}, xmm2, xmm3/m64{er}BValidValidMultiply scalar double precision floating-point OR AVX10.1 value from xmm1 and xmm2, add to xmm3/m64 and put result in xmm1.
EVEX.LLIG.66.0F38.W1 B9 /rVFMADD231SD xmm1 {k1}{z}, xmm2, xmm3/m64{er}BValidValidMultiply scalar double precision floating-point OR AVX10.1 value from xmm2 and xmm3/m64, add to xmm1 and put result in xmm1.

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

  1. modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
  2. vex.vvvv lecturaVEX prefix, vvvv field (inverted)
  3. 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

  1. modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
  2. evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
  3. 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: Tuple1 Scalar

Measured cost

Loading measurements from arch-data...

Description

Performs a SIMD multiply-add computation on the low double precision floating-point values using three source operands and writes the multiply-add result in the destination operand. The destination operand is also the first source operand. The first and second operand are XMM registers. The third source operand can be an XMM register or a 64-bit memory location.

VFMADD132SD: Multiplies the low double precision floating-point value from the first source operand to the low double precision floating-point value in the third source operand, adds the infinite precision intermediate result to the low double precision floating-point values in the second source operand, performs rounding and stores the resulting double precision floating-point value to the destination operand (first source operand).

VFMADD213SD: Multiplies the low double precision floating-point value from the second source operand to the low double precision floating-point value in the first source operand, adds the infinite precision intermediate result to the low double precision floating-point value in the third source operand, performs rounding and stores the resulting double precision floating-point value to the destination operand (first source operand).

VFMADD231SD: Multiplies the low double precision floating-point value from the second source to the low double precision floating-point value in the third source operand, adds the infinite precision intermediate result to the low double precision floating-point value in the first source operand, performs rounding and stores the resulting double precision floating-point value to the destination operand (first source operand).

VEX.128 and EVEX encoded version: The destination operand (also first source operand) is encoded in reg_field. The second source operand is encoded in VEX.vvvv/EVEX.vvvv. The third source operand is encoded in rm_field. Bits 127:64 of the destination are unchanged. Bits MAXVL-1:128 of the destination register are zeroed.

EVEX encoded version: The low quadword element of the destination is updated according to the writemask.

Operation

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

VFMADD132SD DEST, SRC2, SRC3 (EVEX encoded version)

IF (EVEX.b = 1) and SRC3 *is a register*

     THEN

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

     ELSE

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

IF k1[0] or *no writemask*

     THEN DEST[63:0] := RoundFPControl(DEST[63:0]*SRC3[63:0] + SRC2[63:0])

     ELSE

     IF *merging-masking*                 ; merging-masking

           THEN *DEST[63:0] remains unchanged*

           ELSE                           ; zeroing-masking

           THEN DEST[63:0] := 0

     FI;

FI;

DEST[127:64] := DEST[127:64]

DEST[MAXVL-1:128] := 0

VFMADD213SD DEST, SRC2, SRC3 (EVEX encoded version)

IF (EVEX.b = 1) and SRC3 *is a register*

     THEN

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

     ELSE

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

IF k1[0] or *no writemask*

     THEN DEST[63:0] := RoundFPControl(SRC2[63:0]*DEST[63:0] + SRC3[63:0])

     ELSE

     IF *merging-masking*                 ; merging-masking

           THEN *DEST[63:0] remains unchanged*

           ELSE                           ; zeroing-masking

           THEN DEST[63:0] := 0

     FI;

FI;

DEST[127:64] := DEST[127:64]

DEST[MAXVL-1:128] := 0


VFMADD231SD DEST, SRC2, SRC3 (EVEX encoded version)

IF (EVEX.b = 1) and SRC3 *is a register*

     THEN

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

     ELSE

     SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

IF k1[0] or *no writemask*

     THEN DEST[63:0] := RoundFPControl(SRC2[63:0]*SRC3[63:0] + DEST[63:0])

     ELSE

     IF *merging-masking*                 ; merging-masking

           THEN *DEST[63:0] remains unchanged*

           ELSE                           ; zeroing-masking

           THEN DEST[63:0] := 0

     FI;

FI;

DEST[127:64] := DEST[127:64]

DEST[MAXVL-1:128] := 0

VFMADD132SD DEST, SRC2, SRC3 (VEX encoded version)
DEST[63:0] := MAXVL-1:128RoundFPControl_MXCSR(DEST[63:0]*SRC3[63:0] + SRC2[63:0])
DEST[127:63] := DEST[127:63]
DEST[MAXVL-1:128] := 0

VFMADD213SD DEST, SRC2, SRC3 (VEX encoded version)
DEST[63:0] := RoundFPControl_MXCSR(SRC2[63:0]*DEST[63:0] + SRC3[63:0])
DEST[127:63] := DEST[127:63]
DEST[MAXVL-1:128] := 0

VFMADD231SD DEST, SRC2, SRC3 (VEX encoded version)
DEST[63:0] := RoundFPControl_MXCSR(SRC2[63:0]*SRC3[63:0] + DEST[63:0])
DEST[127:63] := DEST[127:63]
DEST[MAXVL-1:128] := 0

Intel C/C++ compiler intrinsics

VFMADDxxxSD __m128d _mm_fmadd_round_sd(__m128d a, __m128d b, __m128d c, int r);
VFMADDxxxSD __m128d _mm_mask_fmadd_sd(__m128d a, __mmask8 k, __m128d b, __m128d c);
VFMADDxxxSD __m128d _mm_maskz_fmadd_sd(__mmask8 k, __m128d a, __m128d b, __m128d c);
VFMADDxxxSD __m128d _mm_mask3_fmadd_sd(__m128d a, __m128d b, __m128d c, __mmask8 k);
VFMADDxxxSD __m128d _mm_mask_fmadd_round_sd(__m128d a, __mmask8 k, __m128d b, __m128d c, int r);
VFMADDxxxSD __m128d _mm_maskz_fmadd_round_sd(__mmask8 k, __m128d a, __m128d b, __m128d c, int r);
VFMADDxxxSD __m128d _mm_mask3_fmadd_round_sd(__m128d a, __m128d b, __m128d c, __mmask8 k, int r);
VFMADDxxxSD __m128d _mm_fmadd_sd (__m128d a, __m128d b, __m128d c);

SIMD Floating-Point Exceptions

Overflow, Underflow, Invalid, Precision, Denormal

Other Exceptions

VEX-encoded instructions, see Table 2-20, "Type 3 Class Exception Conditions." EVEX-encoded instructions, see Table 2-49, "Type E3 Class Exception Conditions."

Sources