image/svg+xmlVFMADDSUB132PS/VFMADDSUB213PS/VFMADDSUB231PS—Fused Multiply-Alternating Add/Subtract of Packed Single-Precision Floating-Point ValuesOpcode/InstructionOp / En64/32 bit Mode SupportCPUID Feature FlagDescriptionVEX.128.66.0F38.W0 96 /r VFMADDSUB132PS xmm1, xmm2, xmm3/m128AV/VFMAMultiply packed single-precision floating-point values from xmm1 and xmm3/mem, add/subtract elements in xmm2 and put result in xmm1.VEX.128.66.0F38.W0 A6 /r VFMADDSUB213PS xmm1, xmm2, xmm3/m128 AV/VFMAMultiply packed single-precision floating-point values from xmm1 and xmm2, add/subtract elements in xmm3/mem and put result in xmm1.VEX.128.66.0F38.W0 B6 /r VFMADDSUB231PS xmm1, xmm2, xmm3/m128AV/VFMAMultiply packed single-precision floating-point values from xmm2 and xmm3/mem, add/subtract elements in xmm1 and put result in xmm1.VEX.256.66.0F38.W0 96 /r VFMADDSUB132PS ymm1, ymm2, ymm3/m256AV/VFMAMultiply packed single-precision floating-point values from ymm1 and ymm3/mem, add/subtract elements in ymm2 and put result in ymm1.VEX.256.66.0F38.W0 A6 /r VFMADDSUB213PS ymm1, ymm2, ymm3/m256AV/VFMAMultiply packed single-precision floating-point values from ymm1 and ymm2, add/subtract elements in ymm3/mem and put result in ymm1.VEX.256.66.0F38.W0 B6 /r VFMADDSUB231PS ymm1, ymm2, ymm3/m256AV/VFMAMultiply packed single-precision floating-point values from ymm2 and ymm3/mem, add/subtract elements in ymm1 and put result in ymm1.EVEX.128.66.0F38.W0 A6 /r VFMADDSUB213PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from xmm1 and xmm2, add/subtract elements in xmm3/m128/m32bcst and put result in xmm1 subject to writemask k1.EVEX.128.66.0F38.W0 B6 /r VFMADDSUB231PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from xmm2 and xmm3/m128/m32bcst, add/subtract elements in xmm1 and put result in xmm1 subject to writemask k1.EVEX.128.66.0F38.W0 96 /rVFMADDSUB132PS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from xmm1 and xmm3/m128/m32bcst, add/subtract elements in zmm2 and put result in xmm1 subject to writemask k1.EVEX.256.66.0F38.W0 A6 /r VFMADDSUB213PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from ymm1 and ymm2, add/subtract elements in ymm3/m256/m32bcst and put result in ymm1 subject to writemask k1.EVEX.256.66.0F38.W0 B6 /rVFMADDSUB231PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from ymm2 and ymm3/m256/m32bcst, add/subtract elements in ymm1 and put result in ymm1 subject to writemask k1.EVEX.256.66.0F38.W0 96 /r VFMADDSUB132PS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcstBV/VAVX512VLAVX512FMultiply packed single-precision floating-point values from ymm1 and ymm3/m256/m32bcst, add/subtract elements in ymm2 and put result in ymm1 subject to writemask k1.EVEX.512.66.0F38.W0 A6 /r VFMADDSUB213PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}BV/VAVX512FMultiply packed single-precision floating-point values from zmm1 and zmm2, add/subtract elements in zmm3/m512/m32bcst and put result in zmm1 subject to writemask k1.EVEX.512.66.0F38.W0 B6 /r VFMADDSUB231PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}BV/VAVX512FMultiply packed single-precision floating-point values from zmm2 and zmm3/m512/m32bcst, add/subtract elements in zmm1 and put result in zmm1 subject to writemask k1.EVEX.512.66.0F38.W0 96 /r VFMADDSUB132PS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}BV/VAVX512FMultiply packed single-precision floating-point values from zmm1 and zmm3/m512/m32bcst, add/subtract elements in zmm2 and put result in zmm1 subject to writemask k1.

image/svg+xmlInstruction Operand EncodingDescriptionVFMADDSUB132PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the first source operand to the corresponding packed single-precision floating-point values in the third source operand. From the infinite precision intermediate result, adds the odd single-precision floating-point elements and subtracts the even single-precision floating-point values in the second source operand, performs rounding and stores the resulting packed single-precision floating-point values to the destination operand (first source operand).VFMADDSUB213PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the second source operand to the corresponding packed single-precision floating-point values in the first source operand. From the infinite precision intermediate result, adds the odd single-precision floating-point elements and subtracts the even single-precision floating-point values in the third source operand, performs rounding and stores the resulting packed single-precision floating-point values to the destination operand (first source operand).VFMADDSUB231PS: Multiplies the four, eight or sixteen packed single-precision floating-point values from the second source operand to the corresponding packed single-precision floating-point values in the third source operand. From the infinite precision intermediate result, adds the odd single-precision floating-point elements and subtracts the even single-precision floating-point values in the first source operand, performs rounding and stores the resulting 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 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.Compiler tools may optionally support a complementary mnemonic for each instruction mnemonic listed in the opcode/instruction column of the summary table. The behavior of the complementary mnemonic in situations involving NANs are governed by the definition of the instruction mnemonic defined in the opcode/instruction column.Op/EnTuple TypeOperand 1Operand 2Operand 3Operand 4ANAModRM:reg (r, w)VEX.vvvv (r)ModRM:r/m (r)NABFullModRM:reg (r, w)EVEX.vvvv (r)ModRM:r/m (r)NA

image/svg+xmlOperationIn the operations below, “*” and “+” symbols represent multiplication and addition with infinite precision inputs and outputs (no rounding).VFMADDSUB132PS DEST, SRC2, SRC3 IF (VEX.128) THEN MAXNUM :=2ELSEIF (VEX.256)MAXNUM := 4FIFor i = 0 to MAXNUM -1{n := 64*i;DEST[n+31:n] := RoundFPControl_MXCSR(DEST[n+31:n]*SRC3[n+31:n] - SRC2[n+31:n])DEST[n+63:n+32] := RoundFPControl_MXCSR(DEST[n+63:n+32]*SRC3[n+63:n+32] + SRC2[n+63:n+32])}IF (VEX.128) THENDEST[MAXVL-1:128] := 0ELSEIF (VEX.256)DEST[MAXVL-1:256] := 0FIVFMADDSUB213PS DEST, SRC2, SRC3 IF (VEX.128) THEN MAXNUM := 2ELSEIF (VEX.256)MAXNUM := 4FIFor i = 0 to MAXNUM -1{n := 64*i;DEST[n+31:n] := RoundFPControl_MXCSR(SRC2[n+31:n]*DEST[n+31:n] - SRC3[n+31:n])DEST[n+63:n+32] := RoundFPControl_MXCSR(SRC2[n+63:n+32]*DEST[n+63:n+32] + SRC3[n+63:n+32])}IF (VEX.128) THENDEST[MAXVL-1:128] := 0ELSEIF (VEX.256)DEST[MAXVL-1:256] := 0FI

image/svg+xmlVFMADDSUB231PS DEST, SRC2, SRC3 IF (VEX.128) THEN MAXNUM := 2ELSEIF (VEX.256)MAXNUM := 4FIFor i = 0 to MAXNUM -1{n := 64*i;DEST[n+31:n] := RoundFPControl_MXCSR(SRC2[n+31:n]*SRC3[n+31:n] - DEST[n+31:n])DEST[n+63:n+32] :=RoundFPControl_MXCSR(SRC2[n+63:n+32]*SRC3[n+63:n+32] + DEST[n+63:n+32])}IF (VEX.128) THENDEST[MAXVL-1:128] := 0ELSEIF (VEX.256)DEST[MAXVL-1:256] := 0FIVFMADDSUB132PS 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)THENSET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);ELSE SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);FI;FOR j := 0 TO KL-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN DEST[i+31:i] := RoundFPControl(DEST[i+31:i]*SRC3[i+31:i] - SRC2[i+31:i])ELSE DEST[i+31:i] := RoundFPControl(DEST[i+31:i]*SRC3[i+31:i] + SRC2[i+31:i])FIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0

image/svg+xmlVFMADDSUB132PS 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-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN IF (EVEX.b = 1) THENDEST[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 (EVEX.b = 1) THENDEST[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;FIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0

image/svg+xmlVFMADDSUB213PS 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)THENSET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);ELSE SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);FI;FOR j := 0 TO KL-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN DEST[i+31:i] := RoundFPControl(SRC2[i+31:i]*DEST[i+31:i] - SRC3[i+31:i])ELSE DEST[i+31:i] := RoundFPControl(SRC2[i+31:i]*DEST[i+31:i] + SRC3[i+31:i])FIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0VFMADDSUB213PS 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-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN IF (EVEX.b = 1) THENDEST[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 (EVEX.b = 1) THENDEST[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;

image/svg+xmlFIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0VFMADDSUB231PS 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)THENSET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);ELSE SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);FI;FOR j := 0 TO KL-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN DEST[i+31:i] := RoundFPControl(SRC2[i+31:i]*SRC3[i+31:i] - DEST[i+31:i])ELSE DEST[i+31:i] := RoundFPControl(SRC2[i+31:i]*SRC3[i+31:i] + DEST[i+31:i])FIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0

image/svg+xmlVFMADDSUB231PS 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-1i := j * 32IF k1[j] OR *no writemask*THEN IF j *is even*THEN IF (EVEX.b = 1) THENDEST[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 (EVEX.b = 1) THENDEST[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;FIELSE IF *merging-masking*; merging-maskingTHEN *DEST[i+31:i] remains unchanged*ELSE ; zeroing-maskingDEST[i+31:i] := 0FIFI;ENDFORDEST[MAXVL-1:VL] := 0

image/svg+xmlIntel C/C++ Compiler Intrinsic EquivalentVFMADDSUBxxxPS __m512 _mm512_fmaddsub_ps(__m512 a, __m512 b, __m512 c);VFMADDSUBxxxPS __m512 _mm512_fmaddsub_round_ps(__m512 a, __m512 b, __m512 c, int r);VFMADDSUBxxxPS __m512 _mm512_mask_fmaddsub_ps(__m512 a, __mmask16 k, __m512 b, __m512 c);VFMADDSUBxxxPS __m512 _mm512_maskz_fmaddsub_ps(__mmask16 k, __m512 a, __m512 b, __m512 c);VFMADDSUBxxxPS __m512 _mm512_mask3_fmaddsub_ps(__m512 a, __m512 b, __m512 c, __mmask16 k);VFMADDSUBxxxPS __m512 _mm512_mask_fmaddsub_round_ps(__m512 a, __mmask16 k, __m512 b, __m512 c, int r);VFMADDSUBxxxPS __m512 _mm512_maskz_fmaddsub_round_ps(__mmask16 k, __m512 a, __m512 b, __m512 c, int r);VFMADDSUBxxxPS __m512 _mm512_mask3_fmaddsub_round_ps(__m512 a, __m512 b, __m512 c, __mmask16 k, int r);VFMADDSUBxxxPS __m256 _mm256_mask_fmaddsub_ps(__m256 a, __mmask8 k, __m256 b, __m256 c);VFMADDSUBxxxPS __m256 _mm256_maskz_fmaddsub_ps(__mmask8 k, __m256 a, __m256 b, __m256 c);VFMADDSUBxxxPS __m256 _mm256_mask3_fmaddsub_ps(__m256 a, __m256 b, __m256 c, __mmask8 k);VFMADDSUBxxxPS __m128 _mm_mask_fmaddsub_ps(__m128 a, __mmask8 k, __m128 b, __m128 c);VFMADDSUBxxxPS __m128 _mm_maskz_fmaddsub_ps(__mmask8 k, __m128 a, __m128 b, __m128 c);VFMADDSUBxxxPS __m128 _mm_mask3_fmaddsub_ps(__m128 a, __m128 b, __m128 c, __mmask8 k);VFMADDSUBxxxPS __m128 _mm_fmaddsub_ps (__m128 a, __m128 b, __m128 c);VFMADDSUBxxxPS __m256 _mm256_fmaddsub_ps (__m256 a, __m256 b, __m256 c);SIMD Floating-Point ExceptionsOverflow, Underflow, Invalid, Precision, DenormalOther ExceptionsVEX-encoded instructions, see Table2-19, “Type 2 Class Exception Conditions”.EVEX-encoded instructions, see Table2-46, “Type E2 Class Exception Conditions”.

This UNOFFICIAL reference was generated from the official Intel® 64 and IA-32 Architectures Software Developer’s Manual by a dumb script. There is no guarantee that some parts aren't mangled or broken and is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.