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nir: Add SYSTEM_VALUE_FRAG_COORD_Z/W.

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Intel's going to use these.

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25190>
This commit is contained in:
Emma Anholt 2025-02-20 21:42:40 -08:00 • committed by Marge Bot
parent 7db62e6dad
commit 8fa6d473e7
4 changed files with 9 additions and 0 deletions
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2
src/compiler/nir/nir_gather_info.c
View file

@ -680,6 +680,8 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader,
case nir_intrinsic_load_invocation_id:
case nir_intrinsic_load_frag_coord:
case nir_intrinsic_load_pixel_coord:
case nir_intrinsic_load_frag_coord_z:
case nir_intrinsic_load_frag_coord_w:
case nir_intrinsic_load_frag_shading_rate:
case nir_intrinsic_load_fully_covered:
case nir_intrinsic_load_point_coord:

3
src/compiler/nir/nir_lower_frag_coord_to_pixel_coord.c
View file

@ -18,9 +18,12 @@ lower(nir_builder *b, nir_intrinsic_instr *intr, UNUSED void *data)
*/
b->cursor = nir_before_instr(&intr->instr);
nir_def *xy = nir_u2f32(b, nir_load_pixel_coord(b));
BITSET_SET(b->shader->info.system_values_read, SYSTEM_VALUE_PIXEL_COORD);
nir_def *vec = nir_vec4(b, nir_channel(b, xy, 0), nir_channel(b, xy, 1),
nir_load_frag_coord_z(b),
nir_load_frag_coord_w(b));
BITSET_SET(b->shader->info.system_values_read, SYSTEM_VALUE_FRAG_COORD_Z);
BITSET_SET(b->shader->info.system_values_read, SYSTEM_VALUE_FRAG_COORD_W);
nir_def_rewrite_uses(&intr->def, vec);
return true;
}

2
src/compiler/shader_enums.c
View file

@ -328,6 +328,8 @@ gl_system_value_name(gl_system_value sysval)
ENUM(SYSTEM_VALUE_INVOCATION_ID),
ENUM(SYSTEM_VALUE_FRAG_COORD),
ENUM(SYSTEM_VALUE_PIXEL_COORD),
ENUM(SYSTEM_VALUE_FRAG_COORD_Z),
ENUM(SYSTEM_VALUE_FRAG_COORD_W),
ENUM(SYSTEM_VALUE_POINT_COORD),
ENUM(SYSTEM_VALUE_LINE_COORD),
ENUM(SYSTEM_VALUE_FRONT_FACE),

2
src/compiler/shader_enums.h
View file

@ -783,6 +783,8 @@ typedef enum
/*@{*/
SYSTEM_VALUE_FRAG_COORD,
SYSTEM_VALUE_PIXEL_COORD,
SYSTEM_VALUE_FRAG_COORD_Z,
SYSTEM_VALUE_FRAG_COORD_W,
SYSTEM_VALUE_POINT_COORD,
SYSTEM_VALUE_LINE_COORD, /**< Coord along axis perpendicular to line */
SYSTEM_VALUE_FRONT_FACE,