From: Alyssa Rosenzweig Date: Fri, 28 Aug 2020 12:35:19 +0000 (-0400) Subject: pan/mdg: Refactor texture op/mode handling X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f6e19dd3f45de7bc9edfe0aa9254abc3412c2610;p=mesa.git pan/mdg: Refactor texture op/mode handling We reduce the op to 4-bits, such that the derivative mode becomes its own adjacent parameter. This cleans up handling of texture gathers, but does not affect functionality. Signed-off-by: Alyssa Rosenzweig Part-of: --- diff --git a/src/panfrost/midgard/disassemble.c b/src/panfrost/midgard/disassemble.c index ac5179edd35..5568fa03663 100644 --- a/src/panfrost/midgard/disassemble.c +++ b/src/panfrost/midgard/disassemble.c @@ -1293,15 +1293,11 @@ print_texture_format(FILE *fp, int format) } static bool -midgard_op_has_helpers(unsigned op, bool gather) +midgard_op_has_helpers(unsigned op) { - if (gather) - return true; - switch (op) { case TEXTURE_OP_NORMAL: - case TEXTURE_OP_DFDX: - case TEXTURE_OP_DFDY: + case TEXTURE_OP_DERIVATIVE: return true; default: return false; @@ -1309,30 +1305,14 @@ midgard_op_has_helpers(unsigned op, bool gather) } static void -print_texture_op(FILE *fp, unsigned op, bool gather) +print_texture_op(FILE *fp, unsigned op) { - /* Act like a bare name, like ESSL functions */ - - if (gather) { - fprintf(fp, "textureGather"); - - unsigned component = op >> 4; - unsigned bottom = op & 0xF; - - if (bottom != 0x2) - fprintf(fp, "_unk%u", bottom); - - fprintf(fp, ".%c", components[component]); - return; - } - switch (op) { DEFINE_CASE(TEXTURE_OP_NORMAL, "texture"); DEFINE_CASE(TEXTURE_OP_LOD, "textureLod"); DEFINE_CASE(TEXTURE_OP_TEXEL_FETCH, "texelFetch"); DEFINE_CASE(TEXTURE_OP_BARRIER, "barrier"); - DEFINE_CASE(TEXTURE_OP_DFDX, "dFdx"); - DEFINE_CASE(TEXTURE_OP_DFDY, "dFdy"); + DEFINE_CASE(TEXTURE_OP_DERIVATIVE, "derivative"); default: fprintf(fp, "tex_%X", op); @@ -1399,16 +1379,38 @@ print_texture_barrier(FILE *fp, uint32_t *word) #undef DEFINE_CASE +static const char * +texture_mode(enum mali_texture_mode mode) +{ + switch (mode) { + case TEXTURE_NORMAL: return ""; + case TEXTURE_SHADOW: return ".shadow"; + case TEXTURE_GATHER_X: return ".gatherX"; + case TEXTURE_GATHER_Y: return ".gatherY"; + case TEXTURE_GATHER_Z: return ".gatherZ"; + case TEXTURE_GATHER_W: return ".gatherW"; + default: return "unk"; + } +} + +static const char * +derivative_mode(enum mali_derivative_mode mode) +{ + switch (mode) { + case TEXTURE_DFDX: return ".x"; + case TEXTURE_DFDY: return ".y"; + default: return "unk"; + } +} + static void print_texture_word(FILE *fp, uint32_t *word, unsigned tabs, unsigned in_reg_base, unsigned out_reg_base) { midgard_texture_word *texture = (midgard_texture_word *) word; - - midg_stats.helper_invocations |= - midgard_op_has_helpers(texture->op, texture->is_gather); + midg_stats.helper_invocations |= midgard_op_has_helpers(texture->op); /* Broad category of texture operation in question */ - print_texture_op(fp, texture->op, texture->is_gather); + print_texture_op(fp, texture->op); /* Barriers use a dramatically different code path */ if (texture->op == TEXTURE_OP_BARRIER) { @@ -1419,14 +1421,16 @@ print_texture_word(FILE *fp, uint32_t *word, unsigned tabs, unsigned in_reg_base else if (texture->type == TAG_TEXTURE_4_VTX) fprintf (fp, ".vtx"); + if (texture->op == TEXTURE_OP_DERIVATIVE) + fprintf(fp, "%s", derivative_mode(texture->mode)); + else + fprintf(fp, "%s", texture_mode(texture->mode)); + /* Specific format in question */ print_texture_format(fp, texture->format); /* Instruction "modifiers" parallel the ALU instructions. */ - if (texture->shadow) - fprintf(fp, ".shadow"); - if (texture->cont) fprintf(fp, ".cont"); diff --git a/src/panfrost/midgard/helpers.h b/src/panfrost/midgard/helpers.h index 73f82a5aaaf..e0a595c2c3d 100644 --- a/src/panfrost/midgard/helpers.h +++ b/src/panfrost/midgard/helpers.h @@ -65,11 +65,6 @@ op == midgard_alu_op_fcsel \ ) -#define OP_IS_DERIVATIVE(op) ( \ - op == TEXTURE_OP_DFDX || \ - op == TEXTURE_OP_DFDY \ - ) - #define OP_IS_UNSIGNED_CMP(op) ( \ op == midgard_alu_op_ult || \ op == midgard_alu_op_ule \ diff --git a/src/panfrost/midgard/midgard.h b/src/panfrost/midgard/midgard.h index 7d9e7e13614..6308e89e916 100644 --- a/src/panfrost/midgard/midgard.h +++ b/src/panfrost/midgard/midgard.h @@ -632,23 +632,13 @@ midgard_tex_register_select; /* Texture pipeline results are in r28-r29 */ #define REG_TEX_BASE 28 -/* Texture opcodes... maybe? */ -#define TEXTURE_OP_NORMAL 0x11 /* texture */ -#define TEXTURE_OP_LOD 0x12 /* textureLod */ -#define TEXTURE_OP_TEXEL_FETCH 0x14 /* texelFetch */ - -/* Implements barrier() */ -#define TEXTURE_OP_BARRIER 0x0B - -/* Computes horizontal and vertical derivatives respectively. Use with a float - * sampler and a "2D" texture. Leave texture/sampler IDs as zero; they ought - * to be ignored. Only works for fp32 on 64-bit at a time, so derivatives of a - * vec4 require 2 texture ops. For some reason, the blob computes both X and Y - * derivatives at the same time and just throws out whichever is unused; it's - * not known if this is a quirk of the hardware or just of the blob. */ - -#define TEXTURE_OP_DFDX 0x0D -#define TEXTURE_OP_DFDY 0x1D +enum mali_texture_op { + TEXTURE_OP_NORMAL = 1, /* texture */ + TEXTURE_OP_LOD = 2, /* textureLod */ + TEXTURE_OP_TEXEL_FETCH = 4, + TEXTURE_OP_BARRIER = 11, + TEXTURE_OP_DERIVATIVE = 13 +}; enum mali_sampler_type { MALI_SAMPLER_UNK = 0x0, @@ -657,15 +647,29 @@ enum mali_sampler_type { MALI_SAMPLER_SIGNED = 0x3, /* isampler */ }; +/* Texture modes */ +enum mali_texture_mode { + TEXTURE_NORMAL = 1, + TEXTURE_SHADOW = 5, + TEXTURE_GATHER_X = 8, + TEXTURE_GATHER_Y = 9, + TEXTURE_GATHER_Z = 10, + TEXTURE_GATHER_W = 11, +}; + +enum mali_derivative_mode { + TEXTURE_DFDX = 0, + TEXTURE_DFDY = 1, +}; + typedef struct __attribute__((__packed__)) { unsigned type : 4; unsigned next_type : 4; - unsigned op : 6; - unsigned shadow : 1; - unsigned is_gather : 1; + enum mali_texture_op op : 4; + unsigned mode : 4; /* A little obscure, but last is set for the last texture operation in * a shader. cont appears to just be last's opposite (?). Yeah, I know, diff --git a/src/panfrost/midgard/midgard_compile.c b/src/panfrost/midgard/midgard_compile.c index 544a707453f..5dcb9c55c74 100644 --- a/src/panfrost/midgard/midgard_compile.c +++ b/src/panfrost/midgard/midgard_compile.c @@ -2065,6 +2065,15 @@ pan_attach_constant_bias( return true; } +static enum mali_texture_mode +mdg_texture_mode(nir_tex_instr *instr) +{ + if (instr->is_shadow) + return TEXTURE_SHADOW; + else + return TEXTURE_NORMAL; +} + static void emit_texop_native(compiler_context *ctx, nir_tex_instr *instr, unsigned midgard_texop) @@ -2099,7 +2108,7 @@ emit_texop_native(compiler_context *ctx, nir_tex_instr *instr, .format = midgard_tex_format(instr->sampler_dim), .texture_handle = texture_index, .sampler_handle = sampler_index, - .shadow = instr->is_shadow, + .mode = mdg_texture_mode(instr) } }; diff --git a/src/panfrost/midgard/midgard_derivatives.c b/src/panfrost/midgard/midgard_derivatives.c index 29f459418e1..181759e2ceb 100644 --- a/src/panfrost/midgard/midgard_derivatives.c +++ b/src/panfrost/midgard/midgard_derivatives.c @@ -50,18 +50,18 @@ */ static unsigned -mir_derivative_op(nir_op op) +mir_derivative_mode(nir_op op) { switch (op) { case nir_op_fddx: case nir_op_fddx_fine: case nir_op_fddx_coarse: - return TEXTURE_OP_DFDX; + return TEXTURE_DFDX; case nir_op_fddy: case nir_op_fddy_fine: case nir_op_fddy_coarse: - return TEXTURE_OP_DFDY; + return TEXTURE_DFDY; default: unreachable("Invalid derivative op"); @@ -82,8 +82,7 @@ mir_op_computes_derivatives(gl_shader_stage stage, unsigned op) switch (op) { case TEXTURE_OP_NORMAL: - case TEXTURE_OP_DFDX: - case TEXTURE_OP_DFDY: + case TEXTURE_OP_DERIVATIVE: assert(stage == MESA_SHADER_FRAGMENT); return true; default: @@ -106,8 +105,9 @@ midgard_emit_derivatives(compiler_context *ctx, nir_alu_instr *instr) .src = { ~0, nir_src_index(ctx, &instr->src[0].src), ~0, ~0 }, .swizzle = SWIZZLE_IDENTITY_4, .src_types = { nir_type_float32, nir_type_float32 }, - .op = mir_derivative_op(instr->op), + .op = TEXTURE_OP_DERIVATIVE, .texture = { + .mode = mir_derivative_mode(instr->op), .format = 2, .in_reg_full = 1, .out_full = 1, @@ -126,7 +126,7 @@ midgard_lower_derivatives(compiler_context *ctx, midgard_block *block) { mir_foreach_instr_in_block_safe(block, ins) { if (ins->type != TAG_TEXTURE_4) continue; - if (!OP_IS_DERIVATIVE(ins->op)) continue; + if (ins->op != TEXTURE_OP_DERIVATIVE) continue; /* Check if we need to split */