1139501 - SIMD: optimize SIMD.float32.{min,max}{,Num} with one constant operand

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine: JIT, defect)

Description

[Benjamin Bouvier [:bbouvier] (inactive)]

When we have SIMD.float32x4.min/max/minNum/maxNum and one of the operands is a SIMD constant, we can try some optimization, with respect to the content of the SIMD constant:

- if there's a NaN in any lane, there's nothing we can do.
- if the operation is min and there's no 0 in any lane, we can emit a single minps. I think that if we swap operands to make sure the constant is at a given position, we can even optimize the case with -0...
- if the operation is max and there's no 0 in any lane, we can emit a single maxps.

I'll take care of it, unless somebody beats me to it.

Comment 1

[Benjamin Bouvier [:bbouvier] (inactive)]

Not on my radar right now, feel free to take.

Comment 2

[Benjamin Bouvier [:bbouvier] (inactive)]

SIMD.js is being removed.