static bool
lower_offset(nir_builder *b, nir_tex_instr *tex)
{
int offset_index = nir_tex_instr_src_index(tex, nir_tex_src_offset);
if (offset_index < 0)
return false;
int coord_index = nir_tex_instr_src_index(tex, nir_tex_src_coord);
assert(coord_index >= 0);
assert(tex->src[offset_index].src.is_ssa);
assert(tex->src[coord_index].src.is_ssa);
nir_ssa_def *offset = tex->src[offset_index].src.ssa;
nir_ssa_def *coord = tex->src[coord_index].src.ssa;
b->cursor = nir_before_instr(&tex->instr);
nir_ssa_def *offset_coord;
if (nir_tex_instr_src_type(tex, coord_index) == nir_type_float) {
if (tex->sampler_dim == GLSL_SAMPLER_DIM_RECT) {
offset_coord = nir_fadd(b, coord, nir_i2f32(b, offset));
} else {
nir_ssa_def *txs = get_texture_size(b, tex);
nir_ssa_def *scale = nir_frcp(b, txs);
offset_coord = nir_fadd(b, coord,
nir_fmul(b,
nir_i2f32(b, offset),
scale));
}
} else {
offset_coord = nir_iadd(b, coord, offset);
}
if (tex->is_array) {
/* The offset is not applied to the array index */
if (tex->coord_components == 2) {
offset_coord = nir_vec2(b, nir_channel(b, offset_coord, 0),
nir_channel(b, coord, 1));
} else if (tex->coord_components == 3) {
offset_coord = nir_vec3(b, nir_channel(b, offset_coord, 0),
nir_channel(b, offset_coord, 1),
nir_channel(b, coord, 2));
} else {
unreachable("Invalid number of components");
}
}
nir_instr_rewrite_src(&tex->instr, &tex->src[coord_index].src,
nir_src_for_ssa(offset_coord));
nir_tex_instr_remove_src(tex, offset_index);
return true;
}
static nir_ssa_def *
build_atan(nir_builder *b, nir_ssa_def *y_over_x)
{
nir_ssa_def *abs_y_over_x = nir_fabs(b, y_over_x);
nir_ssa_def *one = nir_imm_float(b, 1.0f);
/*
* range-reduction, first step:
*
* / y_over_x if |y_over_x| <= 1.0;
* x = <
* \ 1.0 / y_over_x otherwise
*/
nir_ssa_def *x = nir_fdiv(b, nir_fmin(b, abs_y_over_x, one),
nir_fmax(b, abs_y_over_x, one));
/*
* approximate atan by evaluating polynomial:
*
* x * 0.9999793128310355 - x^3 * 0.3326756418091246 +
* x^5 * 0.1938924977115610 - x^7 * 0.1173503194786851 +
* x^9 * 0.0536813784310406 - x^11 * 0.0121323213173444
*/
nir_ssa_def *x_2 = nir_fmul(b, x, x);
nir_ssa_def *x_3 = nir_fmul(b, x_2, x);
nir_ssa_def *x_5 = nir_fmul(b, x_3, x_2);
nir_ssa_def *x_7 = nir_fmul(b, x_5, x_2);
nir_ssa_def *x_9 = nir_fmul(b, x_7, x_2);
nir_ssa_def *x_11 = nir_fmul(b, x_9, x_2);
nir_ssa_def *polynomial_terms[] = {
nir_fmul(b, x, nir_imm_float(b, 0.9999793128310355f)),
nir_fmul(b, x_3, nir_imm_float(b, -0.3326756418091246f)),
nir_fmul(b, x_5, nir_imm_float(b, 0.1938924977115610f)),
nir_fmul(b, x_7, nir_imm_float(b, -0.1173503194786851f)),
nir_fmul(b, x_9, nir_imm_float(b, 0.0536813784310406f)),
nir_fmul(b, x_11, nir_imm_float(b, -0.0121323213173444f)),
};
nir_ssa_def *tmp =
build_fsum(b, polynomial_terms, ARRAY_SIZE(polynomial_terms));
/* range-reduction fixup */
tmp = nir_fadd(b, tmp,
nir_fmul(b,
nir_b2f(b, nir_flt(b, one, abs_y_over_x)),
nir_fadd(b, nir_fmul(b, tmp,
nir_imm_float(b, -2.0f)),
nir_imm_float(b, M_PI_2f))));
/* sign fixup */
return nir_fmul(b, tmp, nir_fsign(b, y_over_x));
}
/**
* Approximate asin(x) by the formula:
* asin~(x) = sign(x) * (pi/2 - sqrt(1 - |x|) * (pi/2 + |x|(pi/4 - 1 + |x|(p0 + |x|p1))))
*
* which is correct to first order at x=0 and x=±1 regardless of the p
* coefficients but can be made second-order correct at both ends by selecting
* the fit coefficients appropriately. Different p coefficients can be used
* in the asin and acos implementation to minimize some relative error metric
* in each case.
*/
static nir_ssa_def *
build_asin(nir_builder *b, nir_ssa_def *x, float p0, float p1)
{
nir_ssa_def *abs_x = nir_fabs(b, x);
return nir_fmul(b, nir_fsign(b, x),
nir_fsub(b, nir_imm_float(b, M_PI_2f),
nir_fmul(b, nir_fsqrt(b, nir_fsub(b, nir_imm_float(b, 1.0f), abs_x)),
nir_fadd(b, nir_imm_float(b, M_PI_2f),
nir_fmul(b, abs_x,
nir_fadd(b, nir_imm_float(b, M_PI_4f - 1.0f),
nir_fmul(b, abs_x,
nir_fadd(b, nir_imm_float(b, p0),
nir_fmul(b, abs_x,
nir_imm_float(b, p1))))))))));
}
static nir_ssa_def *
build_atan2(nir_builder *b, nir_ssa_def *y, nir_ssa_def *x)
{
nir_ssa_def *zero = nir_imm_float(b, 0.0f);
/* If |x| >= 1.0e-8 * |y|: */
nir_ssa_def *condition =
nir_fge(b, nir_fabs(b, x),
nir_fmul(b, nir_imm_float(b, 1.0e-8f), nir_fabs(b, y)));
/* Then...call atan(y/x) and fix it up: */
nir_ssa_def *atan1 = build_atan(b, nir_fdiv(b, y, x));
nir_ssa_def *r_then =
nir_bcsel(b, nir_flt(b, x, zero),
nir_fadd(b, atan1,
nir_bcsel(b, nir_fge(b, y, zero),
nir_imm_float(b, M_PIf),
nir_imm_float(b, -M_PIf))),
atan1);
/* Else... */
nir_ssa_def *r_else =
nir_fmul(b, nir_fsign(b, y), nir_imm_float(b, M_PI_2f));
return nir_bcsel(b, condition, r_then, r_else);
}
static void
lower_implicit_lod(nir_builder *b, nir_tex_instr *tex)
{
assert(tex->op == nir_texop_tex || tex->op == nir_texop_txb);
assert(nir_tex_instr_src_index(tex, nir_tex_src_lod) < 0);
assert(nir_tex_instr_src_index(tex, nir_tex_src_ddx) < 0);
assert(nir_tex_instr_src_index(tex, nir_tex_src_ddy) < 0);
b->cursor = nir_before_instr(&tex->instr);
nir_ssa_def *lod = get_texture_lod(b, tex);
int bias_idx = nir_tex_instr_src_index(tex, nir_tex_src_bias);
if (bias_idx >= 0) {
/* If we have a bias, add it in */
lod = nir_fadd(b, lod, nir_ssa_for_src(b, tex->src[bias_idx].src, 1));
nir_tex_instr_remove_src(tex, bias_idx);
}
int min_lod_idx = nir_tex_instr_src_index(tex, nir_tex_src_min_lod);
if (min_lod_idx >= 0) {
/* If we have a minimum LOD, clamp LOD accordingly */
lod = nir_fmax(b, lod, nir_ssa_for_src(b, tex->src[min_lod_idx].src, 1));
nir_tex_instr_remove_src(tex, min_lod_idx);
}
nir_tex_instr_add_src(tex, nir_tex_src_lod, nir_src_for_ssa(lod));
tex->op = nir_texop_txl;
}
static void
vtn_handle_matrix_alu(struct vtn_builder *b, SpvOp opcode,
struct vtn_value *dest,
struct vtn_ssa_value *src0, struct vtn_ssa_value *src1)
{
switch (opcode) {
case SpvOpFNegate: {
dest->ssa = vtn_create_ssa_value(b, src0->type);
unsigned cols = glsl_get_matrix_columns(src0->type);
for (unsigned i = 0; i < cols; i++)
dest->ssa->elems[i]->def = nir_fneg(&b->nb, src0->elems[i]->def);
break;
}
case SpvOpFAdd: {
dest->ssa = vtn_create_ssa_value(b, src0->type);
unsigned cols = glsl_get_matrix_columns(src0->type);
for (unsigned i = 0; i < cols; i++)
dest->ssa->elems[i]->def =
nir_fadd(&b->nb, src0->elems[i]->def, src1->elems[i]->def);
break;
}
case SpvOpFSub: {
dest->ssa = vtn_create_ssa_value(b, src0->type);
unsigned cols = glsl_get_matrix_columns(src0->type);
for (unsigned i = 0; i < cols; i++)
dest->ssa->elems[i]->def =
nir_fsub(&b->nb, src0->elems[i]->def, src1->elems[i]->def);
break;
}
case SpvOpTranspose:
dest->ssa = vtn_ssa_transpose(b, src0);
break;
case SpvOpMatrixTimesScalar:
if (src0->transposed) {
dest->ssa = vtn_ssa_transpose(b, mat_times_scalar(b, src0->transposed,
src1->def));
} else {
dest->ssa = mat_times_scalar(b, src0, src1->def);
}
break;
case SpvOpVectorTimesMatrix:
case SpvOpMatrixTimesVector:
case SpvOpMatrixTimesMatrix:
if (opcode == SpvOpVectorTimesMatrix) {
dest->ssa = matrix_multiply(b, vtn_ssa_transpose(b, src1), src0);
} else {
dest->ssa = matrix_multiply(b, src0, src1);
}
break;
default: unreachable("unknown matrix opcode");
}
}
/**
* Compute xs[0] + xs[1] + xs[2] + ... using fadd.
*/
static nir_ssa_def *
build_fsum(nir_builder *b, nir_ssa_def **xs, int terms)
{
nir_ssa_def *accum = xs[0];
for (int i = 1; i < terms; i++)
accum = nir_fadd(b, accum, xs[i]);
return accum;
}
static nir_ssa_def *
build_mat3_det(nir_builder *b, nir_ssa_def *col[3])
{
unsigned yzx[4] = {1, 2, 0, 0};
unsigned zxy[4] = {2, 0, 1, 0};
nir_ssa_def *prod0 =
nir_fmul(b, col[0],
nir_fmul(b, nir_swizzle(b, col[1], yzx, 3, true),
nir_swizzle(b, col[2], zxy, 3, true)));
nir_ssa_def *prod1 =
nir_fmul(b, col[0],
nir_fmul(b, nir_swizzle(b, col[1], zxy, 3, true),
nir_swizzle(b, col[2], yzx, 3, true)));
nir_ssa_def *diff = nir_fsub(b, prod0, prod1);
return nir_fadd(b, nir_channel(b, diff, 0),
nir_fadd(b, nir_channel(b, diff, 1),
nir_channel(b, diff, 2)));
}
static void
lower_load_sample_pos(lower_wpos_ytransform_state *state,
nir_intrinsic_instr *intr)
{
nir_builder *b = &state->b;
b->cursor = nir_after_instr(&intr->instr);
nir_ssa_def *pos = &intr->dest.ssa;
nir_ssa_def *scale = nir_channel(b, get_transform(state), 0);
nir_ssa_def *neg_scale = nir_channel(b, get_transform(state), 2);
/* Either y or 1-y for scale equal to 1 or -1 respectively. */
nir_ssa_def *flipped_y =
nir_fadd(b, nir_fmax(b, neg_scale, nir_imm_float(b, 0.0)),
nir_fmul(b, nir_channel(b, pos, 1), scale));
nir_ssa_def *flipped_pos = nir_vec2(b, nir_channel(b, pos, 0), flipped_y);
nir_ssa_def_rewrite_uses_after(&intr->dest.ssa, nir_src_for_ssa(flipped_pos),
flipped_pos->parent_instr);
}
static nir_ssa_def *
build_mat4_det(nir_builder *b, nir_ssa_def **col)
{
nir_ssa_def *subdet[4];
for (unsigned i = 0; i < 4; i++) {
unsigned swiz[3];
for (unsigned j = 0; j < 3; j++)
swiz[j] = j + (j >= i);
nir_ssa_def *subcol[3];
subcol[0] = nir_swizzle(b, col[1], swiz, 3, true);
subcol[1] = nir_swizzle(b, col[2], swiz, 3, true);
subcol[2] = nir_swizzle(b, col[3], swiz, 3, true);
subdet[i] = build_mat3_det(b, subcol);
}
nir_ssa_def *prod = nir_fmul(b, col[0], nir_vec(b, subdet, 4));
return nir_fadd(b, nir_fsub(b, nir_channel(b, prod, 0),
nir_channel(b, prod, 1)),
nir_fsub(b, nir_channel(b, prod, 2),
nir_channel(b, prod, 3)));
}
static void
lower_load_pointcoord(lower_wpos_ytransform_state *state,
nir_intrinsic_instr *intr)
{
nir_builder *b = &state->b;
b->cursor = nir_after_instr(&intr->instr);
nir_ssa_def *pntc = &intr->dest.ssa;
nir_ssa_def *transform = get_transform(state);
nir_ssa_def *y = nir_channel(b, pntc, 1);
/* The offset is 1 if we're flipping, 0 otherwise. */
nir_ssa_def *offset = nir_fmax(b, nir_channel(b, transform, 2),
nir_imm_float(b, 0.0));
/* Flip the sign of y if we're flipping. */
nir_ssa_def *scaled = nir_fmul(b, y, nir_channel(b, transform, 0));
/* Reassemble the vector. */
nir_ssa_def *flipped_pntc = nir_vec2(b,
nir_channel(b, pntc, 0),
nir_fadd(b, offset, scaled));
nir_ssa_def_rewrite_uses_after(&intr->dest.ssa, nir_src_for_ssa(flipped_pntc),
flipped_pntc->parent_instr);
}
/* see emit_wpos_adjustment() in st_mesa_to_tgsi.c */
static void
emit_wpos_adjustment(lower_wpos_ytransform_state *state,
nir_intrinsic_instr *intr,
bool invert, float adjX, float adjY[2])
{
nir_builder *b = &state->b;
nir_variable *fragcoord = intr->variables[0]->var;
nir_ssa_def *wpostrans, *wpos_temp, *wpos_temp_y, *wpos_input;
assert(intr->dest.is_ssa);
b->cursor = nir_before_instr(&intr->instr);
wpostrans = get_transform(state);
wpos_input = nir_load_var(b, fragcoord);
/* First, apply the coordinate shift: */
if (adjX || adjY[0] || adjY[1]) {
if (adjY[0] != adjY[1]) {
/* Adjust the y coordinate by adjY[1] or adjY[0] respectively
* depending on whether inversion is actually going to be applied
* or not, which is determined by testing against the inversion
* state variable used below, which will be either +1 or -1.
*/
nir_ssa_def *adj_temp;
adj_temp = nir_cmp(b,
nir_channel(b, wpostrans, invert ? 2 : 0),
nir_imm_vec4(b, adjX, adjY[0], 0.0f, 0.0f),
nir_imm_vec4(b, adjX, adjY[1], 0.0f, 0.0f));
wpos_temp = nir_fadd(b, wpos_input, adj_temp);
} else {
wpos_temp = nir_fadd(b,
wpos_input,
nir_imm_vec4(b, adjX, adjY[0], 0.0f, 0.0f));
}
wpos_input = wpos_temp;
} else {
/* MOV wpos_temp, input[wpos]
*/
wpos_temp = wpos_input;
}
/* Now the conditional y flip: STATE_FB_WPOS_Y_TRANSFORM.xy/zw will be
* inversion/identity, or the other way around if we're drawing to an FBO.
*/
if (invert) {
/* wpos_temp.y = wpos_input * wpostrans.xxxx + wpostrans.yyyy */
wpos_temp_y = nir_fadd(b, nir_fmul(b, nir_channel(b, wpos_temp, 1),
nir_channel(b, wpostrans, 0)),
nir_channel(b, wpostrans, 1));
} else {
/* wpos_temp.y = wpos_input * wpostrans.zzzz + wpostrans.wwww */
wpos_temp_y = nir_fadd(b, nir_fmul(b, nir_channel(b, wpos_temp, 1),
nir_channel(b, wpostrans, 2)),
nir_channel(b, wpostrans, 3));
}
wpos_temp = nir_vec4(b,
nir_channel(b, wpos_temp, 0),
wpos_temp_y,
nir_channel(b, wpos_temp, 2),
nir_channel(b, wpos_temp, 3));
nir_ssa_def_rewrite_uses(&intr->dest.ssa, nir_src_for_ssa(wpos_temp));
}
static struct vtn_ssa_value *
matrix_multiply(struct vtn_builder *b,
struct vtn_ssa_value *_src0, struct vtn_ssa_value *_src1)
{
struct vtn_ssa_value *src0 = wrap_matrix(b, _src0);
struct vtn_ssa_value *src1 = wrap_matrix(b, _src1);
struct vtn_ssa_value *src0_transpose = wrap_matrix(b, _src0->transposed);
struct vtn_ssa_value *src1_transpose = wrap_matrix(b, _src1->transposed);
unsigned src0_rows = glsl_get_vector_elements(src0->type);
unsigned src0_columns = glsl_get_matrix_columns(src0->type);
unsigned src1_columns = glsl_get_matrix_columns(src1->type);
const struct glsl_type *dest_type;
if (src1_columns > 1) {
dest_type = glsl_matrix_type(glsl_get_base_type(src0->type),
src0_rows, src1_columns);
} else {
dest_type = glsl_vector_type(glsl_get_base_type(src0->type), src0_rows);
}
struct vtn_ssa_value *dest = vtn_create_ssa_value(b, dest_type);
dest = wrap_matrix(b, dest);
bool transpose_result = false;
if (src0_transpose && src1_transpose) {
/* transpose(A) * transpose(B) = transpose(B * A) */
src1 = src0_transpose;
src0 = src1_transpose;
src0_transpose = NULL;
src1_transpose = NULL;
transpose_result = true;
}
if (src0_transpose && !src1_transpose &&
glsl_get_base_type(src0->type) == GLSL_TYPE_FLOAT) {
/* We already have the rows of src0 and the columns of src1 available,
* so we can just take the dot product of each row with each column to
* get the result.
*/
for (unsigned i = 0; i < src1_columns; i++) {
nir_ssa_def *vec_src[4];
for (unsigned j = 0; j < src0_rows; j++) {
vec_src[j] = nir_fdot(&b->nb, src0_transpose->elems[j]->def,
src1->elems[i]->def);
}
dest->elems[i]->def = nir_vec(&b->nb, vec_src, src0_rows);
}
} else {
/* We don't handle the case where src1 is transposed but not src0, since
* the general case only uses individual components of src1 so the
* optimizer should chew through the transpose we emitted for src1.
*/
for (unsigned i = 0; i < src1_columns; i++) {
/* dest[i] = sum(src0[j] * src1[i][j] for all j) */
dest->elems[i]->def =
nir_fmul(&b->nb, src0->elems[0]->def,
nir_channel(&b->nb, src1->elems[i]->def, 0));
for (unsigned j = 1; j < src0_columns; j++) {
dest->elems[i]->def =
nir_fadd(&b->nb, dest->elems[i]->def,
nir_fmul(&b->nb, src0->elems[j]->def,
nir_channel(&b->nb, src1->elems[i]->def, j)));
}
}
}
dest = unwrap_matrix(dest);
if (transpose_result)
dest = vtn_ssa_transpose(b, dest);
return dest;
}
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;
}
static void
convert_yuv_to_rgb(nir_builder *b, nir_tex_instr *tex,
nir_ssa_def *y, nir_ssa_def *u, nir_ssa_def *v,
nir_ssa_def *a)
{
nir_const_value m[3] = {
{ .f32 = { 1.0f, 0.0f, 1.59602678f, 0.0f } },
{ .f32 = { 1.0f, -0.39176229f, -0.81296764f, 0.0f } },
{ .f32 = { 1.0f, 2.01723214f, 0.0f, 0.0f } }
};
nir_ssa_def *yuv =
nir_vec4(b,
nir_fmul(b, nir_imm_float(b, 1.16438356f),
nir_fadd(b, y, nir_imm_float(b, -16.0f / 255.0f))),
nir_channel(b, nir_fadd(b, u, nir_imm_float(b, -128.0f / 255.0f)), 0),
nir_channel(b, nir_fadd(b, v, nir_imm_float(b, -128.0f / 255.0f)), 0),
nir_imm_float(b, 0.0));
nir_ssa_def *red = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[0]));
nir_ssa_def *green = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[1]));
nir_ssa_def *blue = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[2]));
nir_ssa_def *result = nir_vec4(b, red, green, blue, a);
nir_ssa_def_rewrite_uses(&tex->dest.ssa, nir_src_for_ssa(result));
}
static void
lower_y_uv_external(nir_builder *b, nir_tex_instr *tex)
static void
handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
const uint32_t *w, unsigned count)
{
struct nir_builder *nb = &b->nb;
const struct glsl_type *dest_type =
vtn_value(b, w[1], vtn_value_type_type)->type->type;
struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
val->ssa = vtn_create_ssa_value(b, dest_type);
/* Collect the various SSA sources */
unsigned num_inputs = count - 5;
nir_ssa_def *src[3] = { NULL, };
for (unsigned i = 0; i < num_inputs; i++)
src[i] = vtn_ssa_value(b, w[i + 5])->def;
switch (entrypoint) {
case GLSLstd450Radians:
val->ssa->def = nir_fmul(nb, src[0], nir_imm_float(nb, 0.01745329251));
return;
case GLSLstd450Degrees:
val->ssa->def = nir_fmul(nb, src[0], nir_imm_float(nb, 57.2957795131));
return;
case GLSLstd450Tan:
val->ssa->def = nir_fdiv(nb, nir_fsin(nb, src[0]),
nir_fcos(nb, src[0]));
return;
case GLSLstd450Modf: {
nir_ssa_def *sign = nir_fsign(nb, src[0]);
nir_ssa_def *abs = nir_fabs(nb, src[0]);
val->ssa->def = nir_fmul(nb, sign, nir_ffract(nb, abs));
nir_store_deref_var(nb, vtn_nir_deref(b, w[6]),
nir_fmul(nb, sign, nir_ffloor(nb, abs)), 0xf);
return;
}
case GLSLstd450ModfStruct: {
nir_ssa_def *sign = nir_fsign(nb, src[0]);
nir_ssa_def *abs = nir_fabs(nb, src[0]);
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = nir_fmul(nb, sign, nir_ffract(nb, abs));
val->ssa->elems[1]->def = nir_fmul(nb, sign, nir_ffloor(nb, abs));
return;
}
case GLSLstd450Step:
val->ssa->def = nir_sge(nb, src[1], src[0]);
return;
case GLSLstd450Length:
val->ssa->def = build_length(nb, src[0]);
return;
case GLSLstd450Distance:
val->ssa->def = build_length(nb, nir_fsub(nb, src[0], src[1]));
return;
case GLSLstd450Normalize:
val->ssa->def = nir_fdiv(nb, src[0], build_length(nb, src[0]));
return;
case GLSLstd450Exp:
val->ssa->def = build_exp(nb, src[0]);
return;
case GLSLstd450Log:
val->ssa->def = build_log(nb, src[0]);
return;
case GLSLstd450FClamp:
val->ssa->def = build_fclamp(nb, src[0], src[1], src[2]);
return;
case GLSLstd450UClamp:
val->ssa->def = nir_umin(nb, nir_umax(nb, src[0], src[1]), src[2]);
return;
case GLSLstd450SClamp:
val->ssa->def = nir_imin(nb, nir_imax(nb, src[0], src[1]), src[2]);
return;
case GLSLstd450Cross: {
unsigned yzx[4] = { 1, 2, 0, 0 };
unsigned zxy[4] = { 2, 0, 1, 0 };
val->ssa->def =
nir_fsub(nb, nir_fmul(nb, nir_swizzle(nb, src[0], yzx, 3, true),
nir_swizzle(nb, src[1], zxy, 3, true)),
nir_fmul(nb, nir_swizzle(nb, src[0], zxy, 3, true),
nir_swizzle(nb, src[1], yzx, 3, true)));
return;
}
case GLSLstd450SmoothStep: {
/* t = clamp((x - edge0) / (edge1 - edge0), 0, 1) */
nir_ssa_def *t =
build_fclamp(nb, nir_fdiv(nb, nir_fsub(nb, src[2], src[0]),
nir_fsub(nb, src[1], src[0])),
nir_imm_float(nb, 0.0), nir_imm_float(nb, 1.0));
/* result = t * t * (3 - 2 * t) */
val->ssa->def =
nir_fmul(nb, t, nir_fmul(nb, t,
nir_fsub(nb, nir_imm_float(nb, 3.0),
nir_fmul(nb, nir_imm_float(nb, 2.0), t))));
return;
}
case GLSLstd450FaceForward:
val->ssa->def =
nir_bcsel(nb, nir_flt(nb, nir_fdot(nb, src[2], src[1]),
nir_imm_float(nb, 0.0)),
src[0], nir_fneg(nb, src[0]));
return;
case GLSLstd450Reflect:
/* I - 2 * dot(N, I) * N */
val->ssa->def =
nir_fsub(nb, src[0], nir_fmul(nb, nir_imm_float(nb, 2.0),
nir_fmul(nb, nir_fdot(nb, src[0], src[1]),
src[1])));
return;
case GLSLstd450Refract: {
nir_ssa_def *I = src[0];
nir_ssa_def *N = src[1];
nir_ssa_def *eta = src[2];
nir_ssa_def *n_dot_i = nir_fdot(nb, N, I);
nir_ssa_def *one = nir_imm_float(nb, 1.0);
nir_ssa_def *zero = nir_imm_float(nb, 0.0);
/* k = 1.0 - eta * eta * (1.0 - dot(N, I) * dot(N, I)) */
nir_ssa_def *k =
nir_fsub(nb, one, nir_fmul(nb, eta, nir_fmul(nb, eta,
nir_fsub(nb, one, nir_fmul(nb, n_dot_i, n_dot_i)))));
nir_ssa_def *result =
nir_fsub(nb, nir_fmul(nb, eta, I),
nir_fmul(nb, nir_fadd(nb, nir_fmul(nb, eta, n_dot_i),
nir_fsqrt(nb, k)), N));
/* XXX: bcsel, or if statement? */
val->ssa->def = nir_bcsel(nb, nir_flt(nb, k, zero), zero, result);
return;
}
case GLSLstd450Sinh:
/* 0.5 * (e^x - e^(-x)) */
val->ssa->def =
nir_fmul(nb, nir_imm_float(nb, 0.5f),
nir_fsub(nb, build_exp(nb, src[0]),
build_exp(nb, nir_fneg(nb, src[0]))));
return;
case GLSLstd450Cosh:
/* 0.5 * (e^x + e^(-x)) */
val->ssa->def =
nir_fmul(nb, nir_imm_float(nb, 0.5f),
nir_fadd(nb, build_exp(nb, src[0]),
build_exp(nb, nir_fneg(nb, src[0]))));
return;
case GLSLstd450Tanh:
/* (0.5 * (e^x - e^(-x))) / (0.5 * (e^x + e^(-x))) */
val->ssa->def =
nir_fdiv(nb, nir_fmul(nb, nir_imm_float(nb, 0.5f),
nir_fsub(nb, build_exp(nb, src[0]),
build_exp(nb, nir_fneg(nb, src[0])))),
nir_fmul(nb, nir_imm_float(nb, 0.5f),
nir_fadd(nb, build_exp(nb, src[0]),
build_exp(nb, nir_fneg(nb, src[0])))));
return;
case GLSLstd450Asinh:
val->ssa->def = nir_fmul(nb, nir_fsign(nb, src[0]),
build_log(nb, nir_fadd(nb, nir_fabs(nb, src[0]),
nir_fsqrt(nb, nir_fadd(nb, nir_fmul(nb, src[0], src[0]),
nir_imm_float(nb, 1.0f))))));
return;
case GLSLstd450Acosh:
val->ssa->def = build_log(nb, nir_fadd(nb, src[0],
nir_fsqrt(nb, nir_fsub(nb, nir_fmul(nb, src[0], src[0]),
nir_imm_float(nb, 1.0f)))));
return;
case GLSLstd450Atanh: {
nir_ssa_def *one = nir_imm_float(nb, 1.0);
val->ssa->def = nir_fmul(nb, nir_imm_float(nb, 0.5f),
build_log(nb, nir_fdiv(nb, nir_fadd(nb, one, src[0]),
nir_fsub(nb, one, src[0]))));
return;
}
case GLSLstd450Asin:
val->ssa->def = build_asin(nb, src[0], 0.086566724, -0.03102955);
return;
case GLSLstd450Acos:
val->ssa->def = nir_fsub(nb, nir_imm_float(nb, M_PI_2f),
build_asin(nb, src[0], 0.08132463, -0.02363318));
return;
case GLSLstd450Atan:
val->ssa->def = build_atan(nb, src[0]);
return;
case GLSLstd450Atan2:
val->ssa->def = build_atan2(nb, src[0], src[1]);
return;
case GLSLstd450Frexp: {
nir_ssa_def *exponent;
val->ssa->def = build_frexp(nb, src[0], &exponent);
nir_store_deref_var(nb, vtn_nir_deref(b, w[6]), exponent, 0xf);
return;
}
case GLSLstd450FrexpStruct: {
assert(glsl_type_is_struct(val->ssa->type));
val->ssa->elems[0]->def = build_frexp(nb, src[0],
&val->ssa->elems[1]->def);
return;
}
default:
val->ssa->def =
nir_build_alu(&b->nb, vtn_nir_alu_op_for_spirv_glsl_opcode(entrypoint),
src[0], src[1], src[2], NULL);
return;
}
}
static nir_shader *
build_resolve_compute_shader(struct radv_device *dev, bool is_integer, int samples)
{
nir_builder b;
char name[64];
nir_if *outer_if = NULL;
const struct glsl_type *sampler_type = glsl_sampler_type(GLSL_SAMPLER_DIM_MS,
false,
false,
GLSL_TYPE_FLOAT);
const struct glsl_type *img_type = glsl_sampler_type(GLSL_SAMPLER_DIM_2D,
false,
false,
GLSL_TYPE_FLOAT);
snprintf(name, 64, "meta_resolve_cs-%d-%s", samples, is_integer ? "int" : "float");
nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_COMPUTE, NULL);
b.shader->info->name = ralloc_strdup(b.shader, name);
b.shader->info->cs.local_size[0] = 16;
b.shader->info->cs.local_size[1] = 16;
b.shader->info->cs.local_size[2] = 1;
nir_variable *input_img = nir_variable_create(b.shader, nir_var_uniform,
sampler_type, "s_tex");
input_img->data.descriptor_set = 0;
input_img->data.binding = 0;
nir_variable *output_img = nir_variable_create(b.shader, nir_var_uniform,
img_type, "out_img");
output_img->data.descriptor_set = 0;
output_img->data.binding = 1;
nir_ssa_def *invoc_id = nir_load_system_value(&b, nir_intrinsic_load_local_invocation_id, 0);
nir_ssa_def *wg_id = nir_load_system_value(&b, nir_intrinsic_load_work_group_id, 0);
nir_ssa_def *block_size = nir_imm_ivec4(&b,
b.shader->info->cs.local_size[0],
b.shader->info->cs.local_size[1],
b.shader->info->cs.local_size[2], 0);
nir_ssa_def *global_id = nir_iadd(&b, nir_imul(&b, wg_id, block_size), invoc_id);
nir_intrinsic_instr *src_offset = nir_intrinsic_instr_create(b.shader, nir_intrinsic_load_push_constant);
src_offset->src[0] = nir_src_for_ssa(nir_imm_int(&b, 0));
src_offset->num_components = 2;
nir_ssa_dest_init(&src_offset->instr, &src_offset->dest, 2, 32, "src_offset");
nir_builder_instr_insert(&b, &src_offset->instr);
nir_intrinsic_instr *dst_offset = nir_intrinsic_instr_create(b.shader, nir_intrinsic_load_push_constant);
dst_offset->src[0] = nir_src_for_ssa(nir_imm_int(&b, 8));
dst_offset->num_components = 2;
nir_ssa_dest_init(&dst_offset->instr, &dst_offset->dest, 2, 32, "dst_offset");
nir_builder_instr_insert(&b, &dst_offset->instr);
nir_ssa_def *img_coord = nir_iadd(&b, global_id, &src_offset->dest.ssa);
/* do a txf_ms on each sample */
nir_ssa_def *tmp;
nir_tex_instr *tex = nir_tex_instr_create(b.shader, 2);
tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
tex->op = nir_texop_txf_ms;
tex->src[0].src_type = nir_tex_src_coord;
tex->src[0].src = nir_src_for_ssa(img_coord);
tex->src[1].src_type = nir_tex_src_ms_index;
tex->src[1].src = nir_src_for_ssa(nir_imm_int(&b, 0));
tex->dest_type = nir_type_float;
tex->is_array = false;
tex->coord_components = 2;
tex->texture = nir_deref_var_create(tex, input_img);
tex->sampler = NULL;
nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, "tex");
nir_builder_instr_insert(&b, &tex->instr);
tmp = &tex->dest.ssa;
nir_variable *color =
nir_local_variable_create(b.impl, glsl_vec4_type(), "color");
if (!is_integer && samples > 1) {
nir_tex_instr *tex_all_same = nir_tex_instr_create(b.shader, 1);
tex_all_same->sampler_dim = GLSL_SAMPLER_DIM_MS;
tex_all_same->op = nir_texop_samples_identical;
tex_all_same->src[0].src_type = nir_tex_src_coord;
tex_all_same->src[0].src = nir_src_for_ssa(img_coord);
tex_all_same->dest_type = nir_type_float;
tex_all_same->is_array = false;
tex_all_same->coord_components = 2;
tex_all_same->texture = nir_deref_var_create(tex_all_same, input_img);
tex_all_same->sampler = NULL;
nir_ssa_dest_init(&tex_all_same->instr, &tex_all_same->dest, 1, 32, "tex");
nir_builder_instr_insert(&b, &tex_all_same->instr);
nir_ssa_def *all_same = nir_ine(&b, &tex_all_same->dest.ssa, nir_imm_int(&b, 0));
nir_if *if_stmt = nir_if_create(b.shader);
if_stmt->condition = nir_src_for_ssa(all_same);
nir_cf_node_insert(b.cursor, &if_stmt->cf_node);
b.cursor = nir_after_cf_list(&if_stmt->then_list);
for (int i = 1; i < samples; i++) {
nir_tex_instr *tex_add = nir_tex_instr_create(b.shader, 2);
tex_add->sampler_dim = GLSL_SAMPLER_DIM_MS;
tex_add->op = nir_texop_txf_ms;
tex_add->src[0].src_type = nir_tex_src_coord;
tex_add->src[0].src = nir_src_for_ssa(img_coord);
tex_add->src[1].src_type = nir_tex_src_ms_index;
tex_add->src[1].src = nir_src_for_ssa(nir_imm_int(&b, i));
tex_add->dest_type = nir_type_float;
tex_add->is_array = false;
tex_add->coord_components = 2;
tex_add->texture = nir_deref_var_create(tex_add, input_img);
tex_add->sampler = NULL;
nir_ssa_dest_init(&tex_add->instr, &tex_add->dest, 4, 32, "tex");
nir_builder_instr_insert(&b, &tex_add->instr);
tmp = nir_fadd(&b, tmp, &tex_add->dest.ssa);
}
tmp = nir_fdiv(&b, tmp, nir_imm_float(&b, samples));
nir_store_var(&b, color, tmp, 0xf);
b.cursor = nir_after_cf_list(&if_stmt->else_list);
outer_if = if_stmt;
}
nir_store_var(&b, color, &tex->dest.ssa, 0xf);
if (outer_if)
b.cursor = nir_after_cf_node(&outer_if->cf_node);
nir_ssa_def *newv = nir_load_var(&b, color);
nir_ssa_def *coord = nir_iadd(&b, global_id, &dst_offset->dest.ssa);
nir_intrinsic_instr *store = nir_intrinsic_instr_create(b.shader, nir_intrinsic_image_store);
store->src[0] = nir_src_for_ssa(coord);
store->src[1] = nir_src_for_ssa(nir_ssa_undef(&b, 1, 32));
store->src[2] = nir_src_for_ssa(newv);
store->variables[0] = nir_deref_var_create(store, output_img);
nir_builder_instr_insert(&b, &store->instr);
return b.shader;
}
}
static void
convert_yuv_to_rgb(nir_builder *b, nir_tex_instr *tex,
nir_ssa_def *y, nir_ssa_def *u, nir_ssa_def *v)
{
nir_const_value m[3] = {
{ .f32 = { 1.0f, 0.0f, 1.59602678f, 0.0f } },
{ .f32 = { 1.0f, -0.39176229f, -0.81296764f, 0.0f } },
{ .f32 = { 1.0f, 2.01723214f, 0.0f, 0.0f } }
};
nir_ssa_def *yuv =
nir_vec4(b,
nir_fmul(b, nir_imm_float(b, 1.16438356f),
nir_fadd(b, y, nir_imm_float(b, -0.0625f))),
nir_channel(b, nir_fadd(b, u, nir_imm_float(b, -0.5f)), 0),
nir_channel(b, nir_fadd(b, v, nir_imm_float(b, -0.5f)), 0),
nir_imm_float(b, 0.0));
nir_ssa_def *red = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[0]));
nir_ssa_def *green = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[1]));
nir_ssa_def *blue = nir_fdot4(b, yuv, nir_build_imm(b, 4, 32, m[2]));
nir_ssa_def *result = nir_vec4(b, red, green, blue, nir_imm_float(b, 1.0f));
nir_ssa_def_rewrite_uses(&tex->dest.ssa, nir_src_for_ssa(result));
}
static void
lower_y_uv_external(nir_builder *b, nir_tex_instr *tex)
