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nir: Add functions to subtract and compare addresses

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v2: Fix comparing addresses from formats that have more than one
    component by using nir_ball_iequal().  (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Caio Marcelo de Oliveira Filho
2019-05-16 15:11:07 -07:00
parent 09cc3389b9
commit ca164ab495
2 changed files with 54 additions and 0 deletions
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6
src/compiler/nir/nir.h
View File

@@ -3198,6 +3198,12 @@ nir_address_format_to_glsl_type(nir_address_format addr_format)
const nir_const_value *nir_address_format_null_value(nir_address_format addr_format);
nir_ssa_def *nir_build_addr_ieq(struct nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
nir_address_format addr_format);
nir_ssa_def *nir_build_addr_isub(struct nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
nir_address_format addr_format);
nir_ssa_def * nir_explicit_io_address_from_deref(struct nir_builder *b,
nir_deref_instr *deref,
nir_ssa_def *base_addr,

48
src/compiler/nir/nir_lower_io.c
View File

@@ -1258,3 +1258,51 @@ nir_address_format_null_value(nir_address_format addr_format)
assert(addr_format < ARRAY_SIZE(null_values));
return null_values[addr_format];
}
nir_ssa_def *
nir_build_addr_ieq(nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
nir_address_format addr_format)
{
switch (addr_format) {
case nir_address_format_32bit_global:
case nir_address_format_64bit_global:
case nir_address_format_64bit_bounded_global:
case nir_address_format_32bit_index_offset:
case nir_address_format_32bit_offset:
return nir_ball_iequal(b, addr0, addr1);
case nir_address_format_logical:
unreachable("Unsupported address format");
}
unreachable("Invalid address format");
}
nir_ssa_def *
nir_build_addr_isub(nir_builder *b, nir_ssa_def *addr0, nir_ssa_def *addr1,
nir_address_format addr_format)
{
switch (addr_format) {
case nir_address_format_32bit_global:
case nir_address_format_64bit_global:
case nir_address_format_32bit_offset:
assert(addr0->num_components == 1);
assert(addr1->num_components == 1);
return nir_isub(b, addr0, addr1);
case nir_address_format_64bit_bounded_global:
return nir_isub(b, addr_to_global(b, addr0, addr_format),
addr_to_global(b, addr1, addr_format));
case nir_address_format_32bit_index_offset:
assert(addr0->num_components == 2);
assert(addr1->num_components == 2);
/* Assume the same buffer index. */
return nir_isub(b, nir_channel(b, addr0, 1), nir_channel(b, addr1, 1));
case nir_address_format_logical:
unreachable("Unsupported address format");
}
unreachable("Invalid address format");
}