Module: Mesa Branch: master Commit: 816f0515a2ca2dbacada24f7f79d65daf5c0fcf5 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=816f0515a2ca2dbacada24f7f79d65daf5c0fcf5
Author: Connor Abbott <[email protected]> Date: Sun Jan 25 11:42:34 2015 -0500 nir: add a helper function for getting the number of source components Unlike with non-SSA ALU instructions, where if they're per-component you have to look at the writemask to know which source channels are being used, SSA ALU instructions always have all the possible channels enabled so we can just look at the number of components in the SSA definition for per-component instructions to say how many source components are being used. v2: use new name nir_ssa_alu_instr_src_components() Reviewed-by: Jason Ekstrand <[email protected]> Signed-off-by: Connor Abbott <[email protected]> --- src/glsl/nir/nir.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h index 3fb9d3b..980fdd0 100644 --- a/src/glsl/nir/nir.h +++ b/src/glsl/nir/nir.h @@ -652,6 +652,21 @@ nir_alu_instr_channel_used(nir_alu_instr *instr, unsigned src, unsigned channel) return (instr->dest.write_mask >> channel) & 1; } +/* + * For instructions whose destinations are SSA, get the number of channels + * used for a source + */ +static inline unsigned +nir_ssa_alu_instr_src_components(nir_alu_instr *instr, unsigned src) +{ + assert(instr->dest.dest.is_ssa); + + if (nir_op_infos[instr->op].input_sizes[src] > 0) + return nir_op_infos[instr->op].input_sizes[src]; + + return instr->dest.dest.ssa.num_components; +} + typedef enum { nir_deref_type_var, nir_deref_type_array, _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
