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| author | Junxian Zhu <zhujunxian@oss.cipunited.com> | 2023-08-03 14:44:01 +0800 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2023-08-08 12:17:12 +0000 |
| commit | 24f83ed4e29495d5b8b6375aeaa2d34d14629c7d (patch) | |
| tree | 932f6991ef81eecd665e8eadea98c4274c92463b /src/cmd/internal/obj/mips/asm0.go | |
| parent | 87fe5faffca1bce0db513a3c1bb640ccf6a04bc7 (diff) | |
| download | go-24f83ed4e29495d5b8b6375aeaa2d34d14629c7d.tar.xz | |
cmd/internal/obj/mips: add SEB/SEH instructions
Add support for SEB/SEH instructions, which are introduced in mips32r2.
SEB/SEH can be used to sign-extend byte/halfword in registers directly without passing through memory.
Ref: The MIPS32 Instruction Set, Revision 5.04: https://s3-eu-west-1.amazonaws.com/downloads-mips/documents/MD00086-2B-MIPS32BIS-AFP-05.04.pdf
Updates #60072
Change-Id: I33175ae9d943ead5983ac004bd2a158039046d65
Reviewed-on: https://go-review.googlesource.com/c/go/+/515475
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
Diffstat (limited to 'src/cmd/internal/obj/mips/asm0.go')
| -rw-r--r-- | src/cmd/internal/obj/mips/asm0.go | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/cmd/internal/obj/mips/asm0.go b/src/cmd/internal/obj/mips/asm0.go index 3a4dc5d185..f158b6688d 100644 --- a/src/cmd/internal/obj/mips/asm0.go +++ b/src/cmd/internal/obj/mips/asm0.go @@ -1084,7 +1084,6 @@ func buildop(ctxt *obj.Link) { ANEGW, ANEGV, AWORD, - AWSBH, obj.ANOP, obj.ATEXT, obj.AUNDEF, @@ -1106,6 +1105,10 @@ func buildop(ctxt *obj.Link) { case ATEQ: opset(ATNE, r0) + case AWSBH: + opset(ASEB, r0) + opset(ASEH, r0) + case ADSBH: opset(ADSHD, r0) } @@ -1899,6 +1902,10 @@ func (c *ctxt0) oprrr(a obj.As) uint32 { return SP(3, 7) | OP(20, 4) case ADSHD: return SP(3, 7) | OP(44, 4) + case ASEB: + return SP(3, 7) | OP(132, 0) + case ASEH: + return SP(3, 7) | OP(196, 0) } if a < 0 { |