From f47faa431616b36ad0d3811d0bcdd24f8b77cef9 Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Mon, 2 May 2016 17:28:38 -0700 Subject: [PATCH] nir: Add texture opcodes and source types for multisample compression Intel hardware does a form of multisample compression that involves an auxilary surface called the MCS. When an MCS is in use, you have to first sample from the MCS with a special opcode and then pass the result of that operation into the next sample instrucion. Normally, we just do this ourselves in the back-end, but we want to expose that functionality to NIR so that we can use MCS values directly in NIR-based blorp. Reviewed-by: Kenneth Graunke --- src/compiler/nir/nir.h | 6 ++++++ src/compiler/nir/nir_print.c | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index d3934fb7916..dd919945e02 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -1068,6 +1068,7 @@ typedef enum { nir_tex_src_bias, nir_tex_src_lod, nir_tex_src_ms_index, /* MSAA sample index */ + nir_tex_src_ms_mcs, /* MSAA compression value */ nir_tex_src_ddx, nir_tex_src_ddy, nir_tex_src_texture_offset, /* < dynamically uniform indirect offset */ @@ -1087,6 +1088,7 @@ typedef enum { nir_texop_txd, /**< Texture look-up with partial derivatvies */ nir_texop_txf, /**< Texel fetch with explicit LOD */ nir_texop_txf_ms, /**< Multisample texture fetch */ + nir_texop_txf_ms_mcs, /**< Multisample compression value fetch */ nir_texop_txs, /**< Texture size */ nir_texop_lod, /**< Texture lod query */ nir_texop_tg4, /**< Texture gather */ @@ -1215,6 +1217,7 @@ nir_tex_instr_is_query(nir_tex_instr *instr) case nir_texop_lod: case nir_texop_texture_samples: case nir_texop_query_levels: + case nir_texop_txf_ms_mcs: return true; case nir_texop_tex: case nir_texop_txb: @@ -1235,6 +1238,9 @@ nir_tex_instr_src_size(nir_tex_instr *instr, unsigned src) if (instr->src[src].src_type == nir_tex_src_coord) return instr->coord_components; + /* The MCS value is expected to be a vec4 returned by a txf_ms_mcs */ + if (instr->src[src].src_type == nir_tex_src_ms_mcs) + return 4; if (instr->src[src].src_type == nir_tex_src_offset || instr->src[src].src_type == nir_tex_src_ddx || diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c index a36561e39c5..583f66c2b08 100644 --- a/src/compiler/nir/nir_print.c +++ b/src/compiler/nir/nir_print.c @@ -626,6 +626,9 @@ print_tex_instr(nir_tex_instr *instr, print_state *state) case nir_texop_txf_ms: fprintf(fp, "txf_ms "); break; + case nir_texop_txf_ms_mcs: + fprintf(fp, "txf_ms_mcs "); + break; case nir_texop_txs: fprintf(fp, "txs "); break; @@ -676,6 +679,9 @@ print_tex_instr(nir_tex_instr *instr, print_state *state) case nir_tex_src_ms_index: fprintf(fp, "(ms_index)"); break; + case nir_tex_src_ms_mcs: + fprintf(fp, "(ms_mcs)"); + break; case nir_tex_src_ddx: fprintf(fp, "(ddx)"); break; -- 2.30.2