diff options
| author | Joel Sing <joel@sing.id.au> | 2025-09-12 20:54:49 +1000 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2025-09-16 08:43:10 -0700 |
| commit | e2cfc1eb3affe8bcdfeca4a9f0a2d7902dbb940f (patch) | |
| tree | 81de0c326310136913139790ec9f144c6288e6bd /src/cmd/asm | |
| parent | 281c632e6e3df290d4b0f92440cba10903a0295f (diff) | |
| download | go-e2cfc1eb3affe8bcdfeca4a9f0a2d7902dbb940f.tar.xz | |
cmd/internal/obj/riscv: improve handling of float point moves
Translate moves from an integer register to a floating point register, or
from a floating point register to an integer register, to the appropriate
move instruction (i.e. FMVXW/FMVWX/FMVXD/FMVDX).
Add support for MOVF with a constant - we previously added support for MOVD
but not for MOVF. Add special handling for 0.0, which we can translate to
a move from the zero register to a floating point register (leveraging the
above mentioned change).
Change-Id: If8df2f5610e69b4ec0af85efb884951024685f5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/703216
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Diffstat (limited to 'src/cmd/asm')
| -rw-r--r-- | src/cmd/asm/internal/asm/testdata/riscv64.s | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/cmd/asm/internal/asm/testdata/riscv64.s b/src/cmd/asm/internal/asm/testdata/riscv64.s index 4f7e7acd77..39d2faac25 100644 --- a/src/cmd/asm/internal/asm/testdata/riscv64.s +++ b/src/cmd/asm/internal/asm/testdata/riscv64.s @@ -1952,12 +1952,23 @@ start: MOVF 4(X5), F0 // 07a04200 MOVF F0, 4(X5) // 27a20200 MOVF F0, F1 // d3000020 + MOVF X1, F3 // d38100f0 + MOVF F3, X1 // d38001e0 + MOVF X0, F3 // d30100f0 + MOVF $(0.0), F3 // d30100f0 + + // Converted to load of symbol (AUIPC + FLW) + MOVF $(709.78271289338397), F3 // 970f000087a10f00 MOVD 4(X5), F0 // 07b04200 MOVD F0, 4(X5) // 27b20200 MOVD F0, F1 // d3000022 + MOVD F3, X1 // d38001e2 + MOVD X1, F3 // d38100f2 + MOVD X0, F3 // d30100f2 + MOVD $(0.0), F3 // d30100f2 - // Convert to load of symbol (AUIPC + FLD) + // Converted to load of symbol (AUIPC + FLD) MOVD $(709.78271289338397), F3 // 970f000087b10f00 // TLS load with local-exec (LUI + ADDIW + ADD of TP + load) |