nir: add d2i, d2u, d2b opcodes

[mesa.git] / src / compiler / nir / nir_lower_alu_to_scalar.c

diff --git a/src/compiler/nir/nir_lower_alu_to_scalar.c b/src/compiler/nir/nir_lower_alu_to_scalar.c
index 5372fbeed88403c6033477e208e24e2da8fa8bf3..e8ba640fe0baabc54cbd70d346a1230b8b15a0d4 100644 (file)
--- a/src/compiler/nir/nir_lower_alu_to_scalar.c
+++ b/src/compiler/nir/nir_lower_alu_to_scalar.c
@@ -31,9 +31,11 @@
  */
 
 static void
-nir_alu_ssa_dest_init(nir_alu_instr *instr, unsigned num_components)
+nir_alu_ssa_dest_init(nir_alu_instr *instr, unsigned num_components,
+                      unsigned bit_size)
 {
-   nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
+   nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components,
+                     bit_size, NULL);
    instr->dest.write_mask = (1 << num_components) - 1;
 }
 
@@ -46,7 +48,7 @@ lower_reduction(nir_alu_instr *instr, nir_op chan_op, nir_op merge_op,
    nir_ssa_def *last = NULL;
    for (unsigned i = 0; i < num_components; i++) {
       nir_alu_instr *chan = nir_alu_instr_create(builder->shader, chan_op);
-      nir_alu_ssa_dest_init(chan, 1);
+      nir_alu_ssa_dest_init(chan, 1, instr->dest.dest.ssa.bit_size);
       nir_alu_src_copy(&chan->src[0], &instr->src[0], chan);
       chan->src[0].swizzle[0] = chan->src[0].swizzle[i];
       if (nir_op_infos[chan_op].num_inputs > 1) {
@@ -80,6 +82,7 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
    assert(instr->dest.write_mask != 0);
 
    b->cursor = nir_before_instr(&instr->instr);
+   b->exact = instr->exact;
 
 #define LOWER_REDUCTION(name, chan, merge) \
    case name##2: \
@@ -134,6 +137,38 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
       return;
    }
 
+   case nir_op_pack_uvec2_to_uint: {
+      assert(b->shader->options->lower_pack_snorm_2x16 ||
+             b->shader->options->lower_pack_unorm_2x16);
+
+      nir_ssa_def *word =
+         nir_extract_u16(b, instr->src[0].src.ssa, nir_imm_int(b, 0));
+      nir_ssa_def *val =
+         nir_ior(b, nir_ishl(b, nir_channel(b, word, 1), nir_imm_int(b, 16)),
+                                nir_channel(b, word, 0));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      break;
+   }
+
+   case nir_op_pack_uvec4_to_uint: {
+      assert(b->shader->options->lower_pack_snorm_4x8 ||
+             b->shader->options->lower_pack_unorm_4x8);
+
+      nir_ssa_def *byte =
+         nir_extract_u8(b, instr->src[0].src.ssa, nir_imm_int(b, 0));
+      nir_ssa_def *val =
+         nir_ior(b, nir_ior(b, nir_ishl(b, nir_channel(b, byte, 3), nir_imm_int(b, 24)),
+                               nir_ishl(b, nir_channel(b, byte, 2), nir_imm_int(b, 16))),
+                    nir_ior(b, nir_ishl(b, nir_channel(b, byte, 1), nir_imm_int(b, 8)),
+                               nir_channel(b, byte, 0)));
+
+      nir_ssa_def_rewrite_uses(&instr->dest.dest.ssa, nir_src_for_ssa(val));
+      nir_instr_remove(&instr->instr);
+      break;
+   }
+
    case nir_op_fdph: {
       nir_ssa_def *sum[4];
       for (unsigned i = 0; i < 3; i++) {
@@ -188,7 +223,7 @@ lower_alu_instr_scalar(nir_alu_instr *instr, nir_builder *b)
             lower->src[i].swizzle[j] = instr->src[i].swizzle[src_chan];
       }
 
-      nir_alu_ssa_dest_init(lower, 1);
+      nir_alu_ssa_dest_init(lower, 1, instr->dest.dest.ssa.bit_size);
       lower->dest.saturate = instr->dest.saturate;
       comps[chan] = &lower->dest.dest.ssa;