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| author | eric fang <eric.fang@arm.com> | 2021-06-21 08:17:35 +0000 |
|---|---|---|
| committer | eric fang <eric.fang@arm.com> | 2021-08-18 02:07:22 +0000 |
| commit | 8e18428e389c04f38c3b7e8f152d7f14077b7850 (patch) | |
| tree | d4ef448e83e59c0f6c60233ff0337b26b0c063bc /src/cmd/internal | |
| parent | aef24d8f7db4fb895055e4543af958d7dc2eb8cc (diff) | |
| download | go-8e18428e389c04f38c3b7e8f152d7f14077b7850.tar.gz go-8e18428e389c04f38c3b7e8f152d7f14077b7850.zip | |
cmd/internal/obj/arm64: don't use REGTMP when moving C_AACON2 to a register
MOVD $C_AACON2(Rf), Rt is encoded as ADD $C_AACON2_high_12_bits, Rf, REGTMP +
ADD $C_AACON2_low_12_bits, REGTMP, Rt. Actually REGTMP is not necessary here,
we can use Rt directly, so it becomes ADD $C_AACON2_high_12_bits, Rf, Rt +
ADD $C_AACON2_low_12_bits, Rt, Rt.
Change-Id: I90b7718b5fb0ab9f3ea28511f42946a6bdccfef3
Reviewed-on: https://go-review.googlesource.com/c/go/+/329751
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: eric fang <eric.fang@arm.com>
Run-TryBot: eric fang <eric.fang@arm.com>
Diffstat (limited to 'src/cmd/internal')
| -rw-r--r-- | src/cmd/internal/obj/arm64/asm7.go | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go index 02687ab162..050add9aac 100644 --- a/src/cmd/internal/obj/arm64/asm7.go +++ b/src/cmd/internal/obj/arm64/asm7.go @@ -417,7 +417,7 @@ var optab = []Optab{ {AMOVK, C_VCON, C_NONE, C_NONE, C_REG, 33, 4, 0, 0, 0}, {AMOVD, C_AACON, C_NONE, C_NONE, C_RSP, 4, 4, REGFROM, 0, 0}, - {AMOVD, C_AACON2, C_NONE, C_NONE, C_RSP, 4, 8, REGFROM, 0, 0}, + {AMOVD, C_AACON2, C_NONE, C_NONE, C_RSP, 4, 8, REGFROM, NOTUSETMP, 0}, /* load long effective stack address (load int32 offset and add) */ {AMOVD, C_LACON, C_NONE, C_NONE, C_RSP, 34, 8, REGSP, LFROM, 0}, @@ -3306,8 +3306,10 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) { } if int(o.size) == 8 { - o1 = c.oaddi(p, op, v&0xfff000, r, REGTMP) - o2 = c.oaddi(p, op, v&0x000fff, REGTMP, rt) + // NOTE: this case does not use REGTMP. If it ever does, + // remove the NOTUSETMP flag in optab. + o1 = c.oaddi(p, op, v&0xfff000, r, rt) + o2 = c.oaddi(p, op, v&0x000fff, rt, rt) break } |