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nir: add support for round to zero rounding mode to nir_op_f2f32 

f2f16's rounding modes are already handled and f2f64 don't need it
as there is not a floating point type with higher bit size than 64 for
now.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Samuel Iglesias Gonsálvez 2019-02-13 10:31:37 +01:00 committed by Andres Gomez
parent 5308333e78
commit 0ac07c7ca7
2 changed files with 11 additions and 0 deletions
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1
src/compiler/nir/nir_constant_expressions.py
View File

@ -63,6 +63,7 @@ template = """\
#include <math.h>
#include "util/rounding.h" /* for _mesa_roundeven */
#include "util/half_float.h"
#include "util/double.h"
#include "util/bigmath.h"
#include "nir_constant_expressions.h"

10
src/compiler/nir/nir_opcodes.py
View File

@ -224,6 +224,16 @@ for src_t in [tint, tuint, tfloat, tbool]:
unop_numeric_convert("{0}2{1}{2}{3}".format(src_t[0], dst_t[0],
bit_size, rnd_mode),
dst_t + str(bit_size), src_t, "src0")
elif bit_size == 32 and dst_t == tfloat and src_t == tfloat:
conv_expr = """
if (bit_size > 32 && nir_is_rounding_mode_rtz(execution_mode, 32)) {
dst = _mesa_double_to_float_rtz(src0);
} else {
dst = src0;
}
"""
unop_numeric_convert("{0}2{1}{2}".format(src_t[0], dst_t[0], bit_size),
dst_t + str(bit_size), src_t, conv_expr)
else:
conv_expr = "src0 != 0" if dst_t == tbool else "src0"
unop_numeric_convert("{0}2{1}{2}".format(src_t[0], dst_t[0], bit_size),