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cmd/asm: add rotr/drotr for mips64

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This CL encodes:

ROTR rd, rt, sa
ROTRV rd, rt, rs

=> ROTR (SCON|REG), (REG,)? REG

DROTR rd, rt, sa
DROTR32 rd, rt, sa
DROTRV rd, rt, rs

=> ROTRV (SCON|REG), (REG,)? REG

Note: ROTRV will handle const over 32
Ref: The MIPS64® Instruction Set Reference Manual Revision 6.05
Change-Id: Ibe69f999b83eb43843d088cf1ac5a13c995269a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/280114
Trust: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Meng Zhuo 2021-03-16 18:51:41 +08:00
parent bd0fc0b9c3
commit e31e84010e
4 changed files with 26 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

8
src/cmd/asm/internal/asm/testdata/mips64.s vendored
View file

@ -407,6 +407,8 @@ label4:
SRLV R27, R6, R17 // 03668816
SRA R11, R19, R20 // 0173a007
SRAV R20, R19, R19 // 02939817
ROTR R19, R18, R20 // 0272a046
ROTRV R9, R13, R16 // 012d8056
// LSHW rreg ',' rreg
// {
@ -418,6 +420,8 @@ label4:
SRLV R27, R6 // 03663016
SRA R11, R19 // 01739807
SRAV R20, R19 // 02939817
ROTR R20, R19 // 02939846
ROTRV R16, R9 // 02094856
// LSHW imm ',' sreg ',' rreg
// {
@ -429,6 +433,8 @@ label4:
SRLV $31, R6, R17 // 00068ffa
SRA $8, R8, R19 // 00089a03
SRAV $19, R8, R7 // 00083cfb
ROTR $12, R8, R3 // 00281b02
ROTRV $8, R22, R22 // 0036b23a
// LSHW imm ',' rreg
// {
@ -440,6 +446,8 @@ label4:
SRLV $31, R17 // 00118ffa
SRA $3, R12 // 000c60c3
SRAV $12, R3 // 00031b3b
ROTR $12, R8 // 00284302
ROTRV $63, R22 // 0036b7fe
// LAND/LXOR/LNOR/LOR rreg ',' rreg

2
src/cmd/internal/obj/mips/a.out.go
View file

@ -390,6 +390,8 @@ const (
AREM
AREMU
ARFE
AROTR
AROTRV
ASC
ASCV
ASGT

2
src/cmd/internal/obj/mips/anames.go
View file

@ -78,6 +78,8 @@ var Anames = []string{
"REM",
"REMU",
"RFE",
"ROTR",
"ROTRV",
"SC",
"SCV",
"SGT",

15
src/cmd/internal/obj/mips/asm0.go
View file

@ -1022,10 +1022,12 @@ func buildop(ctxt *obj.Link) {
case ASLL:
opset(ASRL, r0)
opset(ASRA, r0)
opset(AROTR, r0)
case ASLLV:
opset(ASRAV, r0)
opset(ASRLV, r0)
opset(AROTRV, r0)
case ASUB:
opset(ASUBU, r0)
@ -1732,12 +1734,16 @@ func (c *ctxt0) oprrr(a obj.As) uint32 {
return OP(0, 6)
case ASRA:
return OP(0, 7)
case AROTR:
return OP(8, 6)
case ASLLV:
return OP(2, 4)
case ASRLV:
return OP(2, 6)
case ASRAV:
return OP(2, 7)
case AROTRV:
return OP(10, 6)
case AADDV:
return OP(5, 4)
case AADDVU:
@ -1916,6 +1922,8 @@ func (c *ctxt0) opirr(a obj.As) uint32 {
return OP(0, 2)
case ASRA:
return OP(0, 3)
case AROTR:
return OP(0, 2) | 1<<21
case AADDV:
return SP(3, 0)
case AADDVU:
@ -2028,12 +2036,16 @@ func (c *ctxt0) opirr(a obj.As) uint32 {
return OP(7, 2)
case ASRAV:
return OP(7, 3)
case AROTRV:
return OP(7, 2) | 1<<21
case -ASLLV:
return OP(7, 4)
case -ASRLV:
return OP(7, 6)
case -ASRAV:
return OP(7, 7)
case -AROTRV:
return OP(7, 6) | 1<<21
case ATEQ:
return OP(6, 4)
@ -2061,7 +2073,8 @@ func vshift(a obj.As) bool {
switch a {
case ASLLV,
ASRLV,
ASRAV:
ASRAV,
AROTRV:
return true
}
return false