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cmd/internal/obj{,/loong64}: instructions and registers for loong64

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Implemented an assembler for LoongArch64(loong64 is short name) -
this provides register definitions and instruction encoding as
defined in the LoongArch Instruction Set Manual.

LoongArch Instruction Set Manual:
  https://github.com/loongson/LoongArch-Documentation/releases

Contributors to the linux/loong64 port are:
  Weining Lu <luweining@loongson.cn>
  Lei Wang <wanglei@loongson.cn>
  Lingqin Gong <gonglingqin@loongson.cn>
  Xiaolin Zhao <zhaoxiaolin@loongson.cn>
  Meidan Li <limeidan@loongson.cn>
  Xiaojuan Zhai <zhaixiaojuan@loongson.cn>
  Qiyuan Pu <puqiyuan@loongson.cn>
  Guoqi Chen <chenguoqi@loongson.cn>

This port has been updated to Go 1.15.6:
  https://github.com/loongson/go

Updates #46229

Change-Id: I930d2a19246496e3ca36d55539183c0f9f650ad9
Reviewed-on: https://go-review.googlesource.com/c/go/+/342309
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Xiaodong Liu 2021-08-15 16:01:31 +08:00 • committed by Gopher Robot
parent 857cda4625
commit c1105cfd43
8 changed files with 3305 additions and 9 deletions
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19
src/cmd/internal/obj/util.go
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@ -507,15 +507,16 @@ var regSpace []regSet
const (
// Because of masking operations in the encodings, each register
// space should start at 0 modulo some power of 2.
RBase386 = 1 * 1024
RBaseAMD64 = 2 * 1024
RBaseARM = 3 * 1024
RBasePPC64 = 4 * 1024 // range [4k, 8k)
RBaseARM64 = 8 * 1024 // range [8k, 13k)
RBaseMIPS = 13 * 1024 // range [13k, 14k)
RBaseS390X = 14 * 1024 // range [14k, 15k)
RBaseRISCV = 15 * 1024 // range [15k, 16k)
RBaseWasm = 16 * 1024
RBase386 = 1 * 1024
RBaseAMD64 = 2 * 1024
RBaseARM = 3 * 1024
RBasePPC64 = 4 * 1024 // range [4k, 8k)
RBaseARM64 = 8 * 1024 // range [8k, 13k)
RBaseMIPS = 13 * 1024 // range [13k, 14k)
RBaseS390X = 14 * 1024 // range [14k, 15k)
RBaseRISCV = 15 * 1024 // range [15k, 16k)
RBaseWasm = 16 * 1024
RBaseLOONG64 = 17 * 1024
)
// RegisterRegister binds a pretty-printer (Rconv) for register