Module core::core_arch::x86::fma

🔬This is a nightly-only experimental API. (stdsimd #48556)

Available on x86 or x86-64 only.

Fused Multiply-Add instruction set (FMA)

The FMA instruction set is an extension to the 128 and 256-bit SSE instructions in the x86 microprocessor instruction set to perform fused multiply–add (FMA) operations.

The references are:

• Intel 64 and IA-32 Architectures Software Developer’s Manual Volume 2: Instruction Set Reference, A-Z.
• AMD64 Architecture Programmer’s Manual, Volume 3: General-Purpose and System Instructions.

Wikipedia’s FMA page provides a quick overview of the instructions available.

Functions

• vfmaddsd 🔒 ^⚠Experimental
• vfmaddss 🔒 ^⚠Experimental
• vfmaddsubpd 🔒 ^⚠Experimental
• vfmaddsubpd256 🔒 ^⚠Experimental
• vfmaddsubps 🔒 ^⚠Experimental
• vfmaddsubps256 🔒 ^⚠Experimental
• vfmsubaddpd 🔒 ^⚠Experimental
• vfmsubaddpd256 🔒 ^⚠Experimental
• vfmsubaddps 🔒 ^⚠Experimental
• vfmsubaddps256 🔒 ^⚠Experimental
• vfmsubpd 🔒 ^⚠Experimental
• vfmsubpd256 🔒 ^⚠Experimental
• vfmsubps 🔒 ^⚠Experimental
• vfmsubps256 🔒 ^⚠Experimental
• vfmsubsd 🔒 ^⚠Experimental
• vfmsubss 🔒 ^⚠Experimental
• vfnmaddpd 🔒 ^⚠Experimental
• vfnmaddpd256 🔒 ^⚠Experimental
• vfnmaddps 🔒 ^⚠Experimental
• vfnmaddps256 🔒 ^⚠Experimental
• vfnmaddsd 🔒 ^⚠Experimental
• vfnmaddss 🔒 ^⚠Experimental
• vfnmsubpd 🔒 ^⚠Experimental
• vfnmsubpd256 🔒 ^⚠Experimental
• vfnmsubps 🔒 ^⚠Experimental
• vfnmsubps256 🔒 ^⚠Experimental
• vfnmsubsd 🔒 ^⚠Experimental
• vfnmsubss 🔒 ^⚠Experimental
• _mm256_fmadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and add the intermediate result to packed elements in c.
• _mm256_fmadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and add the intermediate result to packed elements in c.
• _mm256_fmaddsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and alternatively add and subtract packed elements in c to/from the intermediate result.
• _mm256_fmaddsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and alternatively add and subtract packed elements in c to/from the intermediate result.
• _mm256_fmsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and subtract packed elements in c from the intermediate result.
• _mm256_fmsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the intermediate result.
• _mm256_fmsubadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and alternatively subtract and add packed elements in c from/to the intermediate result.
• _mm256_fmsubadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and alternatively subtract and add packed elements in c from/to the intermediate result.
• _mm256_fnmadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and add the negated intermediate result to packed elements in c.
• _mm256_fnmadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and add the negated intermediate result to packed elements in c.
• _mm256_fnmsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result.
• _mm256_fnmsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result.
• _mm_fmadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and add the intermediate result to packed elements in c.
• _mm_fmadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and add the intermediate result to packed elements in c.
• _mm_fmadd_sd^⚠fma
  Multiplies the lower double-precision (64-bit) floating-point elements in a and b, and add the intermediate result to the lower element in c. Stores the result in the lower element of the returned value, and copy the upper element from a to the upper elements of the result.
• _mm_fmadd_ss^⚠fma
  Multiplies the lower single-precision (32-bit) floating-point elements in a and b, and add the intermediate result to the lower element in c. Stores the result in the lower element of the returned value, and copy the 3 upper elements from a to the upper elements of the result.
• _mm_fmaddsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and alternatively add and subtract packed elements in c to/from the intermediate result.
• _mm_fmaddsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and alternatively add and subtract packed elements in c to/from the intermediate result.
• _mm_fmsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and subtract packed elements in c from the intermediate result.
• _mm_fmsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the intermediate result.
• _mm_fmsub_sd^⚠fma
  Multiplies the lower double-precision (64-bit) floating-point elements in a and b, and subtract the lower element in c from the intermediate result. Store the result in the lower element of the returned value, and copy the upper element from a to the upper elements of the result.
• _mm_fmsub_ss^⚠fma
  Multiplies the lower single-precision (32-bit) floating-point elements in a and b, and subtract the lower element in c from the intermediate result. Store the result in the lower element of the returned value, and copy the 3 upper elements from a to the upper elements of the result.
• _mm_fmsubadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and alternatively subtract and add packed elements in c from/to the intermediate result.
• _mm_fmsubadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and alternatively subtract and add packed elements in c from/to the intermediate result.
• _mm_fnmadd_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and add the negated intermediate result to packed elements in c.
• _mm_fnmadd_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and add the negated intermediate result to packed elements in c.
• _mm_fnmadd_sd^⚠fma
  Multiplies the lower double-precision (64-bit) floating-point elements in a and b, and add the negated intermediate result to the lower element in c. Store the result in the lower element of the returned value, and copy the upper element from a to the upper elements of the result.
• _mm_fnmadd_ss^⚠fma
  Multiplies the lower single-precision (32-bit) floating-point elements in a and b, and add the negated intermediate result to the lower element in c. Store the result in the lower element of the returned value, and copy the 3 upper elements from a to the upper elements of the result.
• _mm_fnmsub_pd^⚠fma
  Multiplies packed double-precision (64-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result.
• _mm_fnmsub_ps^⚠fma
  Multiplies packed single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result.
• _mm_fnmsub_sd^⚠fma
  Multiplies the lower double-precision (64-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result. Store the result in the lower element of the returned value, and copy the upper element from a to the upper elements of the result.
• _mm_fnmsub_ss^⚠fma
  Multiplies the lower single-precision (32-bit) floating-point elements in a and b, and subtract packed elements in c from the negated intermediate result. Store the result in the lower element of the returned value, and copy the 3 upper elements from a to the upper elements of the result.