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cmd/internal/obj/loong64: add aliases to 32-bit arithmetic instructions

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Both the MULW and MUL instructions point to the mul.w instruction
in the loong64 ISA. Previously, MULW was not encoded; now it is
encoded and used as an alias for MUL.
The same applies to the following instructions: ADD, SUB, DIV.
For consistency, we have added additional aliases for DIVU, REM and REMU.

Change-Id: Iba201a3c4c2893ff7d301ef877fad9c81e54291b
Reviewed-on: https://go-review.googlesource.com/c/go/+/721523
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Xiaolin Zhao 2025-11-18 16:00:35 +08:00 • committed by Gopher Robot
parent 37ce4adcd4
commit c0f02c11ff
6 changed files with 45 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

23
src/cmd/internal/obj/loong64/asm.go
View file

@ -1428,6 +1428,7 @@ func buildop(ctxt *obj.Link) {
opset(AFTINTRNEVD, r0)
case AADD:
opset(AADDW, r0)
opset(ASGT, r0)
opset(ASGTU, r0)
opset(AADDU, r0)
@ -1512,18 +1513,24 @@ func buildop(ctxt *obj.Link) {
opset(ABSTRINSV, r0)
case ASUB:
opset(ASUBW, r0)
opset(ASUBU, r0)
opset(ANOR, r0)
opset(ASUBV, r0)
opset(ASUBVU, r0)
opset(AMUL, r0)
opset(AMULW, r0)
opset(AMULU, r0)
opset(AMULH, r0)
opset(AMULHU, r0)
opset(AREM, r0)
opset(AREMW, r0)
opset(AREMU, r0)
opset(AREMWU, r0)
opset(ADIV, r0)
opset(ADIVW, r0)
opset(ADIVU, r0)
opset(ADIVWU, r0)
opset(AMULV, r0)
opset(AMULVU, r0)
opset(AMULHV, r0)
@ -3244,7 +3251,7 @@ func (c *ctxt0) oprrrr(a obj.As) uint32 {
func (c *ctxt0) oprrr(a obj.As) uint32 {
switch a {
case AADD:
case AADD, AADDW:
return 0x20 << 15
case AADDU:
return 0x20 << 15
@ -3266,7 +3273,7 @@ func (c *ctxt0) oprrr(a obj.As) uint32 {
return 0x2c << 15 // orn
case AANDN:
return 0x2d << 15 // andn
case ASUB:
case ASUB, ASUBW:
return 0x22 << 15
case ASUBU, ANEGW:
return 0x22 << 15
@ -3297,7 +3304,7 @@ func (c *ctxt0) oprrr(a obj.As) uint32 {
case ASUBVU, ANEGV:
return 0x23 << 15
case AMUL:
case AMUL, AMULW:
return 0x38 << 15 // mul.w
case AMULU:
return 0x38 << 15 // mul.w
@ -3317,17 +3324,17 @@ func (c *ctxt0) oprrr(a obj.As) uint32 {
return 0x3e << 15 // mulw.d.w
case AMULWVWU:
return 0x3f << 15 // mulw.d.wu
case ADIV:
case ADIV, ADIVW:
return 0x40 << 15 // div.w
case ADIVU:
case ADIVU, ADIVWU:
return 0x42 << 15 // div.wu
case ADIVV:
return 0x44 << 15 // div.d
case ADIVVU:
return 0x46 << 15 // div.du
case AREM:
case AREM, AREMW:
return 0x41 << 15 // mod.w
case AREMU:
case AREMU, AREMWU:
return 0x43 << 15 // mod.wu
case AREMV:
return 0x45 << 15 // mod.d
@ -4485,7 +4492,7 @@ func (c *ctxt0) opir(a obj.As) uint32 {
func (c *ctxt0) opirr(a obj.As) uint32 {
switch a {
case AADD, AADDU:
case AADD, AADDW, AADDU:
return 0x00a << 22
case ASGT:
return 0x008 << 22