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[fpmp] Single-limb kernels for wide constants that fit one limb; 6-operation single-limb product at high - #12640

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[fpmp] Single-limb kernels for wide constants that fit one limb; 6-operation single-limb product at high#12640
rmlarsen wants to merge 5 commits into
NVIDIA:mainfrom
rmlarsen:fpmp-wide-scalar-operands

Commits on Nov 13, 2026
- [fpmp] Single-limb kernels for wide constants that fit one limb
  
  rmlarsen
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- [fpmp] Docs: a one-limb product at high costs one instruction more than the pair's
  
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- [fpmp] Docs: say that only constants of integer type stay cheaper at high
  
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- [fpmp] Use the 6-operation single-limb product at high too
  
  rmlarsen
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Commits on Nov 14, 2026
- [fpmp] Docs: 1.5 is a double whose value a float holds
  
  rmlarsen
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  claude
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  dfdb1f1