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nir: Add builder helpers for MOVs with ALU sources and swizzling MOVs. 

These will be useful for prog->nir and tgsi->nir.

v2: Don't forget to mark nir_swizzle as inline (Eric).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke 2015-03-25 14:51:02 -07:00
parent 75c922e0fe
commit 06f7bea96a
1 changed files with 44 additions and 0 deletions
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44
src/glsl/nir/nir_builder.h
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@ -162,4 +162,48 @@ nir_##op(nir_builder *build, nir_ssa_def *src0, \
#include "nir_builder_opcodes.h"
/**
* Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
*/
static inline nir_ssa_def *
nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_instr_insert_after_cf_list(build->cf_node_list, &mov->instr);
return &mov->dest.dest.ssa;
}
static inline nir_ssa_def *
nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_instr_insert_after_cf_list(build->cf_node_list, &mov->instr);
return &mov->dest.dest.ssa;
}
/**
* Construct an fmov or imov that reswizzles the source's components.
*/
static inline nir_ssa_def *
nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
unsigned num_components, bool use_fmov)
{
nir_alu_src alu_src;
memset(&alu_src, 0, sizeof(alu_src));
alu_src.src = nir_src_for_ssa(src);
for (int i = 0; i < 4; i++)
alu_src.swizzle[i] = swiz[i];
return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
nir_imov_alu(build, alu_src, num_components);
}
#endif /* NIR_BUILDER_H */