diff options
| author | Joel Sing <joel@sing.id.au> | 2023-08-26 04:19:40 +1000 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2023-11-07 10:37:24 +0000 |
| commit | dc74a3dd4f30c4a3df235aac8a9e84575767ba69 (patch) | |
| tree | 94b7cca8caf61a35fae614984edcf627d86dd73c /src/cmd/asm/internal | |
| parent | 1d9040bf08cf8cda30b203c21de12a4b6ab66153 (diff) | |
| download | go-dc74a3dd4f30c4a3df235aac8a9e84575767ba69.tar.xz | |
cmd/internal/obj/riscv: support subtraction with a constant
Allow SUB and SUBW to be specified with a constant, which are mapped
to ADDI and ADDIW with negated values.
Change-Id: I7dc55692febc81ea87393b0a3a7d23a43c30313b
Reviewed-on: https://go-review.googlesource.com/c/go/+/538915
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: M Zhuo <mzh@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Wang Yaduo <wangyaduo@linux.alibaba.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Diffstat (limited to 'src/cmd/asm/internal')
| -rw-r--r-- | src/cmd/asm/internal/asm/testdata/riscv64.s | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cmd/asm/internal/asm/testdata/riscv64.s b/src/cmd/asm/internal/asm/testdata/riscv64.s index 2afa457105..072302b225 100644 --- a/src/cmd/asm/internal/asm/testdata/riscv64.s +++ b/src/cmd/asm/internal/asm/testdata/riscv64.s @@ -94,6 +94,10 @@ start: SUB X6, X5, X7 // b3836240 SUB X5, X6 // 33035340 + SUB $-2047, X5, X6 // 1383f27f + SUB $2048, X5, X6 // 13830280 + SUB $-2047, X5 // 9382f27f + SUB $2048, X5 // 93820280 SRA X6, X5, X7 // b3d36240 SRA X5, X6 // 33535340 @@ -157,6 +161,7 @@ start: ADDW $1, X6 // 1b031300 SLLW $1, X6 // 1b131300 SRLW $1, X6 // 1b531300 + SUBW $1, X6 // 1b03f3ff SRAW $1, X6 // 1b531340 // 5.3: Load and Store Instructions (RV64I) |