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cmd/internal/obj/riscv: add two-operand form to more instructions 

Add two-operand form "op rs, rd" to
ADDW/SUBW/SLLW/SRLW/SRAW/SLLIW/SRLIW/SRAIW.

Do the following map:
"ADDW $imm, rd" -> "ADDIW $imm, rd"
"SLLW $imm, rd" -> "SLLIW $imm, rd"
"SRLW $imm, rd" -> "SRLIW $imm, rd"
"SRAW $imm, rd" -> "SRAIW $imm, rd"

Change-Id: Ie9632ba198ba8c05faac91504e4b97fc45ca1196
GitHub-Last-Rev: c6ccc9d5d0
GitHub-Pull-Request: golang/go#51984
Reviewed-on: https://go-review.googlesource.com/c/go/+/396134
Run-TryBot: Ben Shi <powerman1st@163.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
This commit is contained in:
Ben Shi 2022-03-28 11:40:02 +00:00 committed by Ben Shi
parent 9a9bd10290
commit 94727bed02
2 changed files with 22 additions and 0 deletions
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13
src/cmd/asm/internal/asm/testdata/riscv64.s vendored
View File

@ -145,6 +145,19 @@ start:
SRLW X5, X6, X7 // bb535300
SUBW X5, X6, X7 // bb035340
SRAW X5, X6, X7 // bb535340
ADDIW $1, X6 // 1b031300
SLLIW $1, X6 // 1b131300
SRLIW $1, X6 // 1b531300
SRAIW $1, X6 // 1b531340
ADDW X5, X7 // bb835300
SLLW X5, X7 // bb935300
SRLW X5, X7 // bbd35300
SUBW X5, X7 // bb835340
SRAW X5, X7 // bbd35340
ADDW $1, X6 // 1b031300
SLLW $1, X6 // 1b131300
SRLW $1, X6 // 1b531300
SRAW $1, X6 // 1b531340
// 5.3: Load and Store Instructions (RV64I)
LD (X5), X6 // 03b30200

9
src/cmd/internal/obj/riscv/obj.go
View File

@ -53,6 +53,7 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
if p.Reg == obj.REG_NONE {
switch p.As {
case AADDI, ASLTI, ASLTIU, AANDI, AORI, AXORI, ASLLI, ASRLI, ASRAI,
AADDIW, ASLLIW, ASRLIW, ASRAIW, AADDW, ASUBW, ASLLW, ASRLW, ASRAW,
AADD, AAND, AOR, AXOR, ASLL, ASRL, ASUB, ASRA,
AMUL, AMULH, AMULHU, AMULHSU, AMULW, ADIV, ADIVU, ADIVW, ADIVUW,
AREM, AREMU, AREMW, AREMUW:
@ -82,6 +83,14 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
p.As = ASRLI
case ASRA:
p.As = ASRAI
case AADDW:
p.As = AADDIW
case ASLLW:
p.As = ASLLIW
case ASRLW:
p.As = ASRLIW
case ASRAW:
p.As = ASRAIW
}
}