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cmd/asm: refactor some operands that are not special registers on arm64

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The previous code treats some operands such as EQ, LT, etc. as special
registers. However, they are not. This CL adds a new AddrType TYPE_SPOPD
and a new class C_SPOPD to support this kind of special operands, and
refactors the relevant code.

This patch is a copy of CL 260861, contributed by Junchen Li(junchen.li@arm.com).

Co-authored-by: Junchen Li(junchen.li@arm.com)
Change-Id: I57b28da458ee3332f610602632e7eda03af435f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/302849
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Eric Fang <eric.fang@arm.com>
Run-TryBot: Eric Fang <eric.fang@arm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
erifan01 2020-08-12 17:41:54 +08:00 • committed by Eric Fang
parent bb2b16d15e
commit f5290ef947
14 changed files with 330 additions and 219 deletions
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7
src/cmd/internal/obj/link.go
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@ -94,6 +94,12 @@ import (
// type = TYPE_SCONST
// val = string
//
// <symbolic constant name>
// Special symbolic constants for ARM64, such as conditional flags, tlbi_op and so on.
// Encoding:
// type = TYPE_SPECIAL
// offset = The constant value corresponding to this symbol
//
// <register name>
// Any register: integer, floating point, control, segment, and so on.
// If looking for specific register kind, must check type and reg value range.
@ -236,6 +242,7 @@ const (
TYPE_REGREG2
TYPE_INDIR
TYPE_REGLIST
TYPE_SPECIAL
)
func (a *Addr) Target() *Prog {