| commit | 355c3a037edd8107bc4f1918d7a84764039ac6d1 | [log] [tgz] |
|---|---|---|
| author | eric fang <eric.fang@arm.com> | Mon Feb 01 07:47:06 2021 +0000 |
| committer | eric fang <eric.fang@arm.com> | Thu Mar 04 01:28:21 2021 +0000 |
| tree | f6b900de933826cf6ee6a3e30c582916ff727385 | |
| parent | 726d704c32acf99a9ed44d81c99adb22d4759241 [diff] |
cmd/internal/obj/asm64: add support for moving BITCON to RSP Constant of BITCON type can be moved into RSP by MOVD or MOVW instructions directly, this CL enables this format of these two instructions. For 32-bit ADDWop instructions with constant, rewrite the high 32-bit to be a repetition of the low 32-bit, just as ANDWop instructions do, so that we can optimize ADDW $bitcon, Rn, Rt as: MOVW $bitcon, Rtmp ADDW Rtmp, Rn, Rt The original code is: MOVZ $bitcon_low, Rtmp MOVK $bitcon_high,Rtmp ADDW Rtmp, Rn, Rt Change-Id: I30e71972bcfd6470a8b6e6ffbacaee79d523805a Reviewed-on: https://go-review.googlesource.com/c/go/+/289649 Trust: eric fang <eric.fang@arm.com> Run-TryBot: eric fang <eric.fang@arm.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: eric fang <eric.fang@arm.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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