[PATCH 16/21] etnaviv: compiler: generate texture loads

[Philipp Zabel]

Emit TEXLD, TEXLDB, and TEXLDL instructions from nir_texop_tex,
nir_texop_txb, and nir_texop_txl texture loads, respectively.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
Signed-off-by: Michael Tretter <m.tretter at pengutronix.de>
---
 .../drivers/etnaviv/etnaviv_compiler.c        | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_compiler.c b/src/gallium/drivers/etnaviv/etnaviv_compiler.c
index f17b9979b705..b2499a7e2f6c 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_compiler.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_compiler.c
@@ -2186,6 +2186,68 @@ etna_emit_intr(struct etna_compile *c, nir_intrinsic_instr *intr)
    }
 }
 
+static void
+etna_emit_tex(struct etna_compile *c, nir_tex_instr *instr)
+{
+   struct etna_inst_dst dst;
+   struct etna_inst_tex tex;
+   struct etna_inst_src src;
+
+   dst.use = 1;
+   dst.amode = 0;
+   dst.reg = instr->dest.is_ssa ? 0 : instr->dest.reg.reg->index;
+   /* nir_tex_instr does not support write mask */
+   dst.comps = INST_COMPS_X | INST_COMPS_Y | INST_COMPS_Z | INST_COMPS_W;
+
+   assert(!instr->texture);
+   assert(nir_tex_instr_src_index(instr, nir_tex_src_texture_offset) == -1);
+   tex.id = instr->texture_index;
+   tex.amode = 0;
+   tex.swiz = INST_SWIZ_IDENTITY;
+
+   src.use = 1;
+   src.reg = instr->src[0].src.is_ssa ? 0 : instr->src[0].src.reg.reg->index;
+   src.swiz = INST_SWIZ_IDENTITY;
+   src.neg = 0;
+   src.abs = 0;
+   src.amode = 0;
+   src.rgroup = 0;
+
+   switch (instr->op) {
+   case nir_texop_tex:
+      emit_inst(c, &(struct etna_inst) {
+         .opcode = INST_OPCODE_TEXLD,
+         .sat = 0,
+         .dst = dst,
+         .tex = tex,
+         .src[0] = src,
+      });
+      break;
+   case nir_texop_txb:
+      emit_inst(c, &(struct etna_inst) {
+         .opcode = INST_OPCODE_TEXLDB,
+         .sat = 0,
+         .dst = dst,
+         .tex = tex,
+         .src[0] = src,
+      });
+      break;
+   case nir_texop_txl:
+      emit_inst(c, &(struct etna_inst) {
+         .opcode = INST_OPCODE_TEXLDL,
+         .sat = 0,
+         .dst = dst,
+         .tex = tex,
+         .src[0] = src,
+      });
+      break;
+   default:
+      BUG("Unhandled nir_tex_instr: %d\n", instr->op);
+      assert(0);
+      break;
+   }
+}
+
 static void
 etna_emit_instr(struct etna_compile *c, nir_instr *instr)
 {
@@ -2193,6 +2255,9 @@ etna_emit_instr(struct etna_compile *c, nir_instr *instr)
    case nir_instr_type_alu:
       etna_emit_alu(c, nir_instr_as_alu(instr));
       break;
+   case nir_instr_type_tex:
+      etna_emit_tex(c, nir_instr_as_tex(instr));
+      break;
    case nir_instr_type_intrinsic:
       etna_emit_intr(c, nir_instr_as_intrinsic(instr));
       break;
-- 
2.17.1