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zink: only emit SpvCapabilityDerivativeControl when needed

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Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8832>
This commit is contained in:
Erik Faye-Lund 2021-02-02 12:24:33 +01:00 • committed by Marge Bot
parent 36a4b423fe
commit b6da248c0e
1 changed files with 18 additions and 1 deletions
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19
src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
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@ -1519,6 +1519,21 @@ get_dest_type(struct ntv_context *ctx, nir_dest *dest, nir_alu_type type)
}
}
static bool
needs_derivative_control(nir_alu_instr *alu)
{
switch (alu->op) {
case nir_op_fddx_coarse:
case nir_op_fddx_fine:
case nir_op_fddy_coarse:
case nir_op_fddy_fine:
return true;
default:
return false;
}
}
static void
emit_alu(struct ntv_context *ctx, nir_alu_instr *alu)
{
@ -1534,6 +1549,9 @@ emit_alu(struct ntv_context *ctx, nir_alu_instr *alu)
unsigned bit_size = nir_dest_bit_size(alu->dest.dest);
unsigned num_components = nir_dest_num_components(alu->dest.dest);
if (needs_derivative_control(alu))
spirv_builder_emit_cap(&ctx->builder, SpvCapabilityDerivativeControl);
SpvId result = 0;
switch (alu->op) {
case nir_op_mov:
@ -3326,7 +3344,6 @@ nir_to_spirv(struct nir_shader *s, const struct zink_so_info *so_info,
// TODO: only enable when needed
if (s->info.stage == MESA_SHADER_FRAGMENT) {
spirv_builder_emit_cap(&ctx.builder, SpvCapabilityDerivativeControl);
spirv_builder_emit_cap(&ctx.builder, SpvCapabilitySampleRateShading);
}
if (s->info.stage == MESA_SHADER_FRAGMENT || s->info.num_images) {