freedreno/ir3: remove half-precision output

This doesn't really work, we can't necessarily just change the outputs
to half-precision like this in anything but simple cases.

Keep the shader key entry around though, eventually with proper mediump
support we could use this with a nir pass to use lower precision frag
shader outputs when the render target format has <= 16b/component.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/freedreno/ir3/ir3_compiler_nir.c b/src/freedreno/ir3/ir3_compiler_nir.c
index 1bc89819dfb430f8aea505be5d65d153e3646915..daa073eb266ae1605e0a5a1485ec45964bfddb18 100644 (file)
--- a/src/freedreno/ir3/ir3_compiler_nir.c
+++ b/src/freedreno/ir3/ir3_compiler_nir.c
@@ -3282,36 +3282,6 @@ ir3_compile_shader_nir(struct ir3_compiler *compiler,
        if (so->binning_pass && (ctx->compiler->gpu_id < 600))
                fixup_binning_pass(ctx);
 
-       /* if we want half-precision outputs, mark the output registers
-        * as half:
-        */
-       if (so->key.half_precision) {
-               for (i = 0; i < ir->noutputs; i++) {
-                       struct ir3_instruction *out = ir->outputs[i];
-
-                       if (!out)
-                               continue;
-
-                       /* if frag shader writes z, that needs to be full precision: */
-                       if (so->outputs[i/4].slot == FRAG_RESULT_DEPTH)
-                               continue;
-
-                       out->regs[0]->flags |= IR3_REG_HALF;
-                       /* output could be a fanout (ie. texture fetch output)
-                        * in which case we need to propagate the half-reg flag
-                        * up to the definer so that RA sees it:
-                        */
-                       if (out->opc == OPC_META_FO) {
-                               out = out->regs[1]->instr;
-                               out->regs[0]->flags |= IR3_REG_HALF;
-                       }
-
-                       if (out->opc == OPC_MOV) {
-                               out->cat1.dst_type = half_type(out->cat1.dst_type);
-                       }
-               }
-       }
-
        if (ir3_shader_debug & IR3_DBG_OPTMSGS) {
                printf("BEFORE CP:\n");
                ir3_print(ir);