diff options
| author | Wayne Zuo <wdvxdr@golangcn.org> | 2022-11-08 15:39:27 +0800 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2023-02-21 18:34:13 +0000 |
| commit | 481a6beba5a76403cd1c4be2fe7a6662439984c7 (patch) | |
| tree | 21a9e386b2efd5093dddc47dfb7d74c550540761 /src/cmd/asm | |
| parent | 51225f6fc648ba3e833f3493700c2996a816bdaa (diff) | |
| download | go-481a6beba5a76403cd1c4be2fe7a6662439984c7.tar.xz | |
cmd/internal/obj/riscv: optimize loading large immediate with trailing zeros
This CL can avoid a memory load for some immediate.
Reduce binary size slightly.
compilecmp HEAD~1 -> HEAD
HEAD~1 (9860faa512): math/big: remove underscores from Binomial docs
HEAD (ac85312f10): cmd/internal/obj/riscv: optimize loading large immediate with many trailing zeros
platform: linux/riscv64
file before after Δ %
addr2line 3892904 3889844 -3060 -0.079%
api 5558527 5555073 -3454 -0.062%
asm 5191725 5187853 -3872 -0.075%
buildid 2631958 2629356 -2602 -0.099%
cgo 4722642 4718516 -4126 -0.087%
compile 25579930 25564496 -15434 -0.060%
cover 4989560 4985580 -3980 -0.080%
dist 3538991 3536299 -2692 -0.076%
doc 3990845 3987605 -3240 -0.081%
fix 3410945 3407097 -3848 -0.113%
link 6701702 6697926 -3776 -0.056%
nm 3802030 3798664 -3366 -0.089%
objdump 4211373 4207651 -3722 -0.088%
pack 2423248 2421048 -2200 -0.091%
pprof 14302052 14296714 -5338 -0.037%
test2json 2724359 2721881 -2478 -0.091%
trace 13598607 13590879 -7728 -0.057%
vet 7612108 7607722 -4386 -0.058%
go 15092773 15087323 -5450 -0.036%
total 133976279 133891527 -84752 -0.063%
Change-Id: I8615c7830ebfee0386f95d0c0fc4d29dc0b4c7fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/448635
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Diffstat (limited to 'src/cmd/asm')
| -rw-r--r-- | src/cmd/asm/internal/asm/testdata/riscv64.s | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/cmd/asm/internal/asm/testdata/riscv64.s b/src/cmd/asm/internal/asm/testdata/riscv64.s index 79d6054869..6f303858b4 100644 --- a/src/cmd/asm/internal/asm/testdata/riscv64.s +++ b/src/cmd/asm/internal/asm/testdata/riscv64.s @@ -318,7 +318,9 @@ start: MOV $-2147483647, X5 // b70200809b821200 // Converted to load of symbol (AUIPC + LD) - MOV $4294967296, X5 // 9702000083b20200 + MOV $4294967295, X5 // 9702000083b20200 + // Converted to MOV $1, X5 + SLLI $32, X5 + MOV $4294967296, X5 // 9302100093920202 MOV (X5), X6 // 03b30200 MOV 4(X5), X6 // 03b34200 |