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| author | Michael Munday <mike.munday@lowrisc.org> | 2021-02-17 15:00:34 +0000 |
|---|---|---|
| committer | Michael Munday <mike.munday@lowrisc.org> | 2021-09-01 21:17:04 +0000 |
| commit | ea51e223c28babc530df475497de0be4579b5e86 (patch) | |
| tree | 89b32b7b4577614d24cff4d7b8b5a206b14c9e99 /test/codegen | |
| parent | 711e1c8224f033ec1d95cdf84465b57b052e8948 (diff) | |
| download | go-ea51e223c28babc530df475497de0be4579b5e86.tar.xz | |
cmd/{asm,compile}: add fused multiply-add support on riscv64
Add support to the assembler for F[N]M{ADD,SUB}[SD] instructions.
Argument order is:
OP RS1, RS2, RS3, RD
Also, add support for the FMA intrinsic to the compiler. Automatic
FMA matching is left to a future CL.
Change-Id: I47166c7393b2ab6bfc2e42aa8c1a8997c3a071b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/293030
Trust: Michael Munday <mike.munday@lowrisc.org>
Run-TryBot: Michael Munday <mike.munday@lowrisc.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
Diffstat (limited to 'test/codegen')
| -rw-r--r-- | test/codegen/math.go | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/codegen/math.go b/test/codegen/math.go index 04cb4e577d..cd573db7b3 100644 --- a/test/codegen/math.go +++ b/test/codegen/math.go @@ -125,9 +125,25 @@ func fma(x, y, z float64) float64 { // s390x:"FMADD" // ppc64:"FMADD" // ppc64le:"FMADD" + // riscv64:"FMADDD" return math.FMA(x, y, z) } +func fms(x, y, z float64) float64 { + // riscv64:"FMSUBD" + return math.FMA(x, y, -z) +} + +func fnma(x, y, z float64) float64 { + // riscv64:"FNMADDD" + return math.FMA(-x, y, z) +} + +func fnms(x, y, z float64) float64 { + // riscv64:"FNMSUBD" + return math.FMA(x, -y, -z) +} + func fromFloat64(f64 float64) uint64 { // amd64:"MOVQ\tX.*, [^X].*" // arm64:"FMOVD\tF.*, R.*" |