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| author | limeidan <limeidan@loongson.cn> | 2024-01-11 15:12:50 +0800 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2024-07-31 15:39:35 +0000 |
| commit | b53809d75dced5729f30d247d8694bfc2940da18 (patch) | |
| tree | dcd8bb728f76c26d5d15f8573832ca3fcad835eb /src | |
| parent | 5ca7d4645ffcb01c9a8497ced818b25911ab3cbf (diff) | |
| download | go-b53809d75dced5729f30d247d8694bfc2940da18.tar.xz | |
cmd/internal/obj/loong64: optimize instruction implementation
The plan9 instructions ASLLV and -ASLLV are translated into the same assembly
instructions, so -ASLLV can be removed and replaced with ASLLV in the
corresponding position.
ASRLV and -ASRLV have the same reason as the above two instructions.
Change-Id: I4bd79ca7bb070f7a924a0205ef2f19cf2b9ae2c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/565623
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Qiqi Huang <huangqiqi@loongson.cn>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cmd/internal/obj/loong64/asm.go | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/src/cmd/internal/obj/loong64/asm.go b/src/cmd/internal/obj/loong64/asm.go index fe71b90e88..ee4a8bb8cb 100644 --- a/src/cmd/internal/obj/loong64/asm.go +++ b/src/cmd/internal/obj/loong64/asm.go @@ -1453,8 +1453,8 @@ func (c *ctxt0) asmout(p *obj.Prog, o *Optab, out []uint32) { case 14: // movwu r,r // NOTE: this case does not use REGTMP. If it ever does, // remove the NOTUSETMP flag in optab. - o1 = OP_16IRR(c.opirr(-ASLLV), uint32(32)&0x3f, uint32(p.From.Reg), uint32(p.To.Reg)) - o2 = OP_16IRR(c.opirr(-ASRLV), uint32(32)&0x3f, uint32(p.To.Reg), uint32(p.To.Reg)) + o1 = OP_16IRR(c.opirr(ASLLV), uint32(32)&0x3f, uint32(p.From.Reg), uint32(p.To.Reg)) + o2 = OP_16IRR(c.opirr(ASRLV), uint32(32)&0x3f, uint32(p.To.Reg), uint32(p.To.Reg)) case 15: // teq $c r,r v := c.regoff(&p.From) @@ -2169,17 +2169,13 @@ func (c *ctxt0) opirr(a obj.As) uint32 { case -AMOVD: return 0x0ae << 22 - case ASLLV, - -ASLLV: + case ASLLV: return 0x0041 << 16 - case ASRLV, - -ASRLV: + case ASRLV: return 0x0045 << 16 - case ASRAV, - -ASRAV: + case ASRAV: return 0x0049 << 16 - case AROTRV, - -AROTRV: + case AROTRV: return 0x004d << 16 case -ALL: return 0x020 << 24 |