diff options
| author | Caio Marcelo de Oliveira Filho <[email protected]> | 2019-05-17 13:46:38 -0700 |
|---|---|---|
| committer | Caio Marcelo de Oliveira Filho <[email protected]> | 2019-06-26 14:13:02 -0700 |
| commit | ae37237713681121d7fa83489ef9370e3fdcce2a (patch) | |
| tree | dff2088713308310e7d2ec9390a62d3d28866987 /src/compiler/nir/nir_clone.c | |
| parent | f97dcb7a55bac650e55bb58182d0af16ba384305 (diff) | |
nir: Add a no wrapping bits to nir_alu_instr
They indicate the operation does not cause overflow or underflow.
This is motivated by SPIR-V decorations NoSignedWrap and
NoUnsignedWrap.
Change the storage of `exact` to be a single bit, so they pack
together.
v2: Handle no_wrap in nir_instr_set. (Karol)
v3: Use two separate flags, since the NIR SSA values and certain
instructions are typeless, so just no_wrap would be insufficient
to know which one was referred to. (Connor)
v4: Don't use nir_instr_set to propagate the flags, unlike `exact`,
consider the instructions different if the flags have different
values. Fix hashing/comparing. (Jason)
Reviewed-by: Karol Herbst <[email protected]> [v1]
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src/compiler/nir/nir_clone.c')
| -rw-r--r-- | src/compiler/nir/nir_clone.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_clone.c b/src/compiler/nir/nir_clone.c index 803923e2578..71303086db7 100644 --- a/src/compiler/nir/nir_clone.c +++ b/src/compiler/nir/nir_clone.c @@ -290,6 +290,8 @@ clone_alu(clone_state *state, const nir_alu_instr *alu) { nir_alu_instr *nalu = nir_alu_instr_create(state->ns, alu->op); nalu->exact = alu->exact; + nalu->no_signed_wrap = alu->no_signed_wrap; + nalu->no_unsigned_wrap = alu->no_unsigned_wrap; __clone_dst(state, &nalu->instr, &nalu->dest.dest, &alu->dest.dest); nalu->dest.saturate = alu->dest.saturate; |