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[dev.simd] cmd/compile, simd: added methods for "float" GetElem

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This also required a "always use operation with least
OverrideBase" filter in choosing the machine instructions.

The order of generated HW operations is slightly
modified because the Float version of GetElem
appears earlier in the sorted operations list,
though it is not chosen to generate the HW Op.

Change-Id: I95fa67afca9c8b6f4f18941fdcaf69afdad8055b
Reviewed-on: https://go-review.googlesource.com/c/go/+/696375
Reviewed-by: Junyang Shao <shaojunyang@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
David Chase 2025-08-14 17:26:15 -04:00
parent 7380213a4e
commit 9a934d5080
11 changed files with 122 additions and 43 deletions
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14
src/simd/ops_amd64.go
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@ -3470,6 +3470,20 @@ func (x Uint8x64) GaloisFieldMulMasked(y Uint8x64, mask Mask8x64) Uint8x64
/* GetElem */
// GetElem retrieves a single constant-indexed element's value.
//
// index results in better performance when it's a constant, a non-constant value will be translated into a jump table.
//
// Asm: VPEXTRD, CPU Feature: AVX
func (x Float32x4) GetElem(index uint8) float32
// GetElem retrieves a single constant-indexed element's value.
//
// index results in better performance when it's a constant, a non-constant value will be translated into a jump table.
//
// Asm: VPEXTRQ, CPU Feature: AVX
func (x Float64x2) GetElem(index uint8) float64
// GetElem retrieves a single constant-indexed element's value.
//
// index results in better performance when it's a constant, a non-constant value will be translated into a jump table.