| commit | fa04d488bd54b8fdd78cc9bcc6d90de4bf5f8efb | [log] [tgz] |
|---|---|---|
| author | fanzha02 <fannie.zhang@arm.com> | Wed Sep 16 14:05:18 2020 +0800 |
| committer | fannie zhang <Fannie.Zhang@arm.com> | Fri Sep 25 01:47:40 2020 +0000 |
| tree | ef0b7d4890d7d108565c388868765d3cbdd4009f | |
| parent | ea106cc07ac73110a8a25fcc5aef07b283159db0 [diff] |
cmd/asm: fix the issue of moving 128-bit integers to vector registers on arm64 The CL 249758 added `FMOVQ $vcon, Vd` instruction and assembler used 128-bit simd literal-loading to load `$vcon` from pool into 128-bit vector register `Vd`. Because Go does not have 128-bit integers for now, the assembler will report an error of `immediate out of range` when assembleing `FMOVQ $0x123456789abcdef0123456789abcdef, V0` instruction. This patch lets 128-bit integers take two 64-bit operands, for the high and low parts separately and adds `VMOVQ $hi, $lo, Vd` instruction to move `$hi<<64+$lo' into 128-bit register `Vd`. In addition, this patch renames `FMOVQ/FMOVD/FMOVS` ops to 'VMOVQ/VMOVD/VMOVS' and uses them to move 128-bit, 64-bit and 32-bit constants into vector registers, respectively Update the go doc. Fixes #40725 Change-Id: Ia3c83bb6463f104d2bee960905053a97299e0a3a Reviewed-on: https://go-review.googlesource.com/c/go/+/255900 Trust: fannie zhang <Fannie.Zhang@arm.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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