From: Alyssa Rosenzweig Date: Fri, 28 Aug 2020 13:48:38 +0000 (-0400) Subject: pan/mdg: Implement texture gathers X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7dab5749c89181bc71b8d1635ab1a9b1a7928163;p=mesa.git pan/mdg: Implement texture gathers As previously shown, it is a mode on top of textureLod. The main gotcha is the results are swizzled; we reuse the Broadcom lowering for that. Also, there's a pretty significant erratum affecting gathers of cubemaps which can be dealt with... eventually. Fixes: dEQP-GLES31.functional.texture.gather.basic.2d.* dEQP-GLES31.functional.texture.gather.basic.2d_array.* Signed-off-by: Alyssa Rosenzweig Part-of: --- diff --git a/src/panfrost/midgard/midgard_compile.c b/src/panfrost/midgard/midgard_compile.c index 5dcb9c55c74..1f54cfdcf39 100644 --- a/src/panfrost/midgard/midgard_compile.c +++ b/src/panfrost/midgard/midgard_compile.c @@ -497,6 +497,7 @@ optimise_nir(nir_shader *nir, unsigned quirks, bool is_blend) .lower_txp = ~0, .lower_tex_without_implicit_lod = (quirks & MIDGARD_EXPLICIT_LOD), + .lower_tg4_broadcom_swizzle = true, /* TODO: we have native gradient.. */ .lower_txd = true, @@ -2068,7 +2069,11 @@ pan_attach_constant_bias( static enum mali_texture_mode mdg_texture_mode(nir_tex_instr *instr) { - if (instr->is_shadow) + if (instr->op == nir_texop_tg4 && instr->is_shadow) + return TEXTURE_GATHER_SHADOW; + else if (instr->op == nir_texop_tg4) + return TEXTURE_GATHER_X + instr->component; + else if (instr->is_shadow) return TEXTURE_SHADOW; else return TEXTURE_NORMAL; @@ -2112,7 +2117,7 @@ emit_texop_native(compiler_context *ctx, nir_tex_instr *instr, } }; - if (instr->is_shadow && !instr->is_new_style_shadow) + if (instr->is_shadow && !instr->is_new_style_shadow && instr->op != nir_texop_tg4) for (int i = 0; i < 4; ++i) ins.swizzle[0][i] = COMPONENT_X; @@ -2282,6 +2287,7 @@ emit_tex(compiler_context *ctx, nir_tex_instr *instr) emit_texop_native(ctx, instr, TEXTURE_OP_NORMAL); break; case nir_texop_txl: + case nir_texop_tg4: emit_texop_native(ctx, instr, TEXTURE_OP_LOD); break; case nir_texop_txf: