static nir_ssa_def *
build_frexp(nir_builder *b, nir_ssa_def *x, nir_ssa_def **exponent)
{
nir_ssa_def *abs_x = nir_fabs(b, x);
nir_ssa_def *zero = nir_imm_float(b, 0.0f);
/* Single-precision floating-point values are stored as
* 1 sign bit;
* 8 exponent bits;
* 23 mantissa bits.
*
* An exponent shift of 23 will shift the mantissa out, leaving only the
* exponent and sign bit (which itself may be zero, if the absolute value
* was taken before the bitcast and shift.
*/
nir_ssa_def *exponent_shift = nir_imm_int(b, 23);
nir_ssa_def *exponent_bias = nir_imm_int(b, -126);
nir_ssa_def *sign_mantissa_mask = nir_imm_int(b, 0x807fffffu);
/* Exponent of floating-point values in the range [0.5, 1.0). */
nir_ssa_def *exponent_value = nir_imm_int(b, 0x3f000000u);
nir_ssa_def *is_not_zero = nir_fne(b, abs_x, zero);
*exponent =
nir_iadd(b, nir_ushr(b, abs_x, exponent_shift),
nir_bcsel(b, is_not_zero, exponent_bias, zero));
return nir_ior(b, nir_iand(b, x, sign_mantissa_mask),
nir_bcsel(b, is_not_zero, exponent_value, zero));
}
void
vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
const uint32_t *w, unsigned count)
{
struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
const struct glsl_type *type =
vtn_value(b, w[1], vtn_value_type_type)->type->type;
vtn_foreach_decoration(b, val, handle_no_contraction, NULL);
/* Collect the various SSA sources */
const unsigned num_inputs = count - 3;
struct vtn_ssa_value *vtn_src[4] = { NULL, };
for (unsigned i = 0; i < num_inputs; i++)
vtn_src[i] = vtn_ssa_value(b, w[i + 3]);
if (glsl_type_is_matrix(vtn_src[0]->type) ||
(num_inputs >= 2 && glsl_type_is_matrix(vtn_src[1]->type))) {
vtn_handle_matrix_alu(b, opcode, val, vtn_src[0], vtn_src[1]);
b->nb.exact = false;
return;
}
val->ssa = vtn_create_ssa_value(b, type);
nir_ssa_def *src[4] = { NULL, };
for (unsigned i = 0; i < num_inputs; i++) {
assert(glsl_type_is_vector_or_scalar(vtn_src[i]->type));
src[i] = vtn_src[i]->def;
}
switch (opcode) {
case SpvOpAny:
if (src[0]->num_components == 1) {
val->ssa->def = nir_imov(&b->nb, src[0]);
} else {
nir_op op;
switch (src[0]->num_components) {
case 2: op = nir_op_bany_inequal2; break;
case 3: op = nir_op_bany_inequal3; break;
case 4: op = nir_op_bany_inequal4; break;
default: unreachable("invalid number of components");
}
val->ssa->def = nir_build_alu(&b->nb, op, src[0],
nir_imm_int(&b->nb, NIR_FALSE),
NULL, NULL);
}
break;
case SpvOpAll:
if (src[0]->num_components == 1) {
val->ssa->def = nir_imov(&b->nb, src[0]);
} else {
nir_op op;
switch (src[0]->num_components) {
case 2: op = nir_op_ball_iequal2; break;
case 3: op = nir_op_ball_iequal3; break;
case 4: op = nir_op_ball_iequal4; break;
default: unreachable("invalid number of components");
}
val->ssa->def = nir_build_alu(&b->nb, op, src[0],
nir_imm_int(&b->nb, NIR_TRUE),
NULL, NULL);
}
break;
case SpvOpOuterProduct: {
for (unsigned i = 0; i < src[1]->num_components; i++) {
val->ssa->elems[i]->def =
nir_fmul(&b->nb, src[0], nir_channel(&b->nb, src[1], i));
}
break;
}
case SpvOpDot:
val->ssa->def = nir_fdot(&b->nb, src[0], src[1]);
break;
case SpvOpIAddCarry:
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = nir_iadd(&b->nb, src[0], src[1]);
val->ssa->elems[1]->def = nir_uadd_carry(&b->nb, src[0], src[1]);
break;
case SpvOpISubBorrow:
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = nir_isub(&b->nb, src[0], src[1]);
val->ssa->elems[1]->def = nir_usub_borrow(&b->nb, src[0], src[1]);
break;
case SpvOpUMulExtended:
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = nir_imul(&b->nb, src[0], src[1]);
val->ssa->elems[1]->def = nir_umul_high(&b->nb, src[0], src[1]);
break;
case SpvOpSMulExtended:
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = nir_imul(&b->nb, src[0], src[1]);
val->ssa->elems[1]->def = nir_imul_high(&b->nb, src[0], src[1]);
break;
case SpvOpFwidth:
val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddy(&b->nb, src[0])));
break;
case SpvOpFwidthFine:
val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddy_fine(&b->nb, src[0])));
break;
case SpvOpFwidthCoarse:
val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddy_coarse(&b->nb, src[0])));
break;
case SpvOpVectorTimesScalar:
/* The builder will take care of splatting for us. */
val->ssa->def = nir_fmul(&b->nb, src[0], src[1]);
break;
case SpvOpIsNan:
val->ssa->def = nir_fne(&b->nb, src[0], src[0]);
break;
case SpvOpIsInf:
val->ssa->def = nir_feq(&b->nb, nir_fabs(&b->nb, src[0]),
nir_imm_float(&b->nb, INFINITY));
break;
case SpvOpFUnordEqual:
case SpvOpFUnordNotEqual:
case SpvOpFUnordLessThan:
case SpvOpFUnordGreaterThan:
case SpvOpFUnordLessThanEqual:
case SpvOpFUnordGreaterThanEqual: {
bool swap;
nir_alu_type src_alu_type = nir_get_nir_type_for_glsl_type(vtn_src[0]->type);
nir_alu_type dst_alu_type = nir_get_nir_type_for_glsl_type(type);
nir_op op = vtn_nir_alu_op_for_spirv_opcode(opcode, &swap, src_alu_type, dst_alu_type);
if (swap) {
nir_ssa_def *tmp = src[0];
src[0] = src[1];
src[1] = tmp;
}
val->ssa->def =
nir_ior(&b->nb,
nir_build_alu(&b->nb, op, src[0], src[1], NULL, NULL),
nir_ior(&b->nb,
nir_fne(&b->nb, src[0], src[0]),
nir_fne(&b->nb, src[1], src[1])));
break;
}
case SpvOpFOrdEqual:
case SpvOpFOrdNotEqual:
case SpvOpFOrdLessThan:
case SpvOpFOrdGreaterThan:
case SpvOpFOrdLessThanEqual:
case SpvOpFOrdGreaterThanEqual: {
bool swap;
nir_alu_type src_alu_type = nir_get_nir_type_for_glsl_type(vtn_src[0]->type);
nir_alu_type dst_alu_type = nir_get_nir_type_for_glsl_type(type);
nir_op op = vtn_nir_alu_op_for_spirv_opcode(opcode, &swap, src_alu_type, dst_alu_type);
if (swap) {
nir_ssa_def *tmp = src[0];
src[0] = src[1];
src[1] = tmp;
}
val->ssa->def =
nir_iand(&b->nb,
nir_build_alu(&b->nb, op, src[0], src[1], NULL, NULL),
nir_iand(&b->nb,
nir_feq(&b->nb, src[0], src[0]),
nir_feq(&b->nb, src[1], src[1])));
break;
}
default: {
bool swap;
nir_alu_type src_alu_type = nir_get_nir_type_for_glsl_type(vtn_src[0]->type);
nir_alu_type dst_alu_type = nir_get_nir_type_for_glsl_type(type);
nir_op op = vtn_nir_alu_op_for_spirv_opcode(opcode, &swap, src_alu_type, dst_alu_type);
if (swap) {
nir_ssa_def *tmp = src[0];
src[0] = src[1];
src[1] = tmp;
}
val->ssa->def = nir_build_alu(&b->nb, op, src[0], src[1], src[2], src[3]);
break;
} /* default */
}
b->nb.exact = false;
}
