#include "nir_builder.h"
+#include "util/format_rgb9e5.h"
+
static inline nir_ssa_def *
nir_shift(nir_builder *b, nir_ssa_def *value, int left_shift)
{
}
static inline nir_ssa_def *
-nir_format_unpack_uint(nir_builder *b, nir_ssa_def *packed,
- const unsigned *bits, unsigned num_components)
+nir_format_mask_uvec(nir_builder *b, nir_ssa_def *src, const unsigned *bits)
+{
+ nir_const_value mask[NIR_MAX_VEC_COMPONENTS];
+ memset(mask, 0, sizeof(mask));
+ for (unsigned i = 0; i < src->num_components; i++) {
+ assert(bits[i] < 32);
+ mask[i].u32 = (1u << bits[i]) - 1;
+ }
+ return nir_iand(b, src, nir_build_imm(b, src->num_components, 32, mask));
+}
+
+static inline nir_ssa_def *
+nir_format_sign_extend_ivec(nir_builder *b, nir_ssa_def *src,
+ const unsigned *bits)
+{
+ assert(src->num_components <= 4);
+ nir_ssa_def *comps[4];
+ for (unsigned i = 0; i < src->num_components; i++) {
+ nir_ssa_def *shift = nir_imm_int(b, src->bit_size - bits[i]);
+ comps[i] = nir_ishr(b, nir_ishl(b, nir_channel(b, src, i), shift), shift);
+ }
+ return nir_vec(b, comps, src->num_components);
+}
+
+
+static inline nir_ssa_def *
+nir_format_unpack_int(nir_builder *b, nir_ssa_def *packed,
+ const unsigned *bits, unsigned num_components,
+ bool sign_extend)
{
assert(num_components >= 1 && num_components <= 4);
+ const unsigned bit_size = packed->bit_size;
nir_ssa_def *comps[4];
- if (bits[0] >= packed->bit_size) {
- assert(bits[0] == packed->bit_size);
+ if (bits[0] >= bit_size) {
+ assert(bits[0] == bit_size);
assert(num_components == 1);
return packed;
}
+ unsigned next_chan = 0;
unsigned offset = 0;
for (unsigned i = 0; i < num_components; i++) {
- assert(bits[i] < 32);
- nir_ssa_def *mask = nir_imm_int(b, (1u << bits[i]) - 1);
- comps[i] = nir_iand(b, nir_shift(b, packed, -offset), mask);
+ assert(bits[i] < bit_size);
+ assert(offset + bits[i] <= bit_size);
+ nir_ssa_def *chan = nir_channel(b, packed, next_chan);
+ nir_ssa_def *lshift = nir_imm_int(b, bit_size - (offset + bits[i]));
+ nir_ssa_def *rshift = nir_imm_int(b, bit_size - bits[i]);
+ if (sign_extend)
+ comps[i] = nir_ishr(b, nir_ishl(b, chan, lshift), rshift);
+ else
+ comps[i] = nir_ushr(b, nir_ishl(b, chan, lshift), rshift);
offset += bits[i];
+ if (offset >= bit_size) {
+ next_chan++;
+ offset -= bit_size;
+ }
}
- assert(offset <= packed->bit_size);
return nir_vec(b, comps, num_components);
}
+static inline nir_ssa_def *
+nir_format_unpack_uint(nir_builder *b, nir_ssa_def *packed,
+ const unsigned *bits, unsigned num_components)
+{
+ return nir_format_unpack_int(b, packed, bits, num_components, false);
+}
+
+static inline nir_ssa_def *
+nir_format_unpack_sint(nir_builder *b, nir_ssa_def *packed,
+ const unsigned *bits, unsigned num_components)
+{
+ return nir_format_unpack_int(b, packed, bits, num_components, true);
+}
+
static inline nir_ssa_def *
nir_format_pack_uint_unmasked(nir_builder *b, nir_ssa_def *color,
const unsigned *bits, unsigned num_components)
nir_format_pack_uint(nir_builder *b, nir_ssa_def *color,
const unsigned *bits, unsigned num_components)
{
- nir_const_value mask;
+ return nir_format_pack_uint_unmasked(b, nir_format_mask_uvec(b, color, bits),
+ bits, num_components);
+}
+
+static inline nir_ssa_def *
+nir_format_bitcast_uvec_unmasked(nir_builder *b, nir_ssa_def *src,
+ unsigned src_bits, unsigned dst_bits)
+{
+ assert(src->bit_size >= src_bits && src->bit_size >= dst_bits);
+ assert(src_bits == 8 || src_bits == 16 || src_bits == 32);
+ assert(dst_bits == 8 || dst_bits == 16 || dst_bits == 32);
+
+ if (src_bits == dst_bits)
+ return src;
+
+ const unsigned dst_components =
+ DIV_ROUND_UP(src->num_components * src_bits, dst_bits);
+ assert(dst_components <= 4);
+
+ nir_ssa_def *dst_chan[4] = {0};
+ if (dst_bits > src_bits) {
+ unsigned shift = 0;
+ unsigned dst_idx = 0;
+ for (unsigned i = 0; i < src->num_components; i++) {
+ nir_ssa_def *shifted = nir_ishl(b, nir_channel(b, src, i),
+ nir_imm_int(b, shift));
+ if (shift == 0) {
+ dst_chan[dst_idx] = shifted;
+ } else {
+ dst_chan[dst_idx] = nir_ior(b, dst_chan[dst_idx], shifted);
+ }
+
+ shift += src_bits;
+ if (shift >= dst_bits) {
+ dst_idx++;
+ shift = 0;
+ }
+ }
+ } else {
+ nir_ssa_def *mask = nir_imm_int(b, ~0u >> (32 - dst_bits));
+
+ unsigned src_idx = 0;
+ unsigned shift = 0;
+ for (unsigned i = 0; i < dst_components; i++) {
+ dst_chan[i] = nir_iand(b, nir_ushr(b, nir_channel(b, src, src_idx),
+ nir_imm_int(b, shift)),
+ mask);
+ shift += dst_bits;
+ if (shift >= src_bits) {
+ src_idx++;
+ shift = 0;
+ }
+ }
+ }
+
+ return nir_vec(b, dst_chan, dst_components);
+}
+
+static inline nir_ssa_def *
+_nir_format_norm_factor(nir_builder *b, const unsigned *bits,
+ unsigned num_components,
+ bool is_signed)
+{
+ nir_const_value factor[NIR_MAX_VEC_COMPONENTS];
+ memset(factor, 0, sizeof(factor));
for (unsigned i = 0; i < num_components; i++) {
assert(bits[i] < 32);
- mask.u32[i] = (1u << bits[i]) - 1;
+ factor[i].f32 = (1ul << (bits[i] - is_signed)) - 1;
}
- nir_ssa_def *mask_imm = nir_build_imm(b, num_components, 32, mask);
+ return nir_build_imm(b, num_components, 32, factor);
+}
- return nir_format_pack_uint_unmasked(b, nir_iand(b, color, mask_imm),
- bits, num_components);
+static inline nir_ssa_def *
+nir_format_unorm_to_float(nir_builder *b, nir_ssa_def *u, const unsigned *bits)
+{
+ nir_ssa_def *factor =
+ _nir_format_norm_factor(b, bits, u->num_components, false);
+
+ return nir_fdiv(b, nir_u2f32(b, u), factor);
+}
+
+static inline nir_ssa_def *
+nir_format_snorm_to_float(nir_builder *b, nir_ssa_def *s, const unsigned *bits)
+{
+ nir_ssa_def *factor =
+ _nir_format_norm_factor(b, bits, s->num_components, true);
+
+ return nir_fmax(b, nir_fdiv(b, nir_i2f32(b, s), factor),
+ nir_imm_float(b, -1.0f));
+}
+
+static inline nir_ssa_def *
+nir_format_float_to_unorm(nir_builder *b, nir_ssa_def *f, const unsigned *bits)
+{
+ nir_ssa_def *factor =
+ _nir_format_norm_factor(b, bits, f->num_components, false);
+
+ /* Clamp to the range [0, 1] */
+ f = nir_fsat(b, f);
+
+ return nir_f2u32(b, nir_fround_even(b, nir_fmul(b, f, factor)));
+}
+
+static inline nir_ssa_def *
+nir_format_float_to_snorm(nir_builder *b, nir_ssa_def *f, const unsigned *bits)
+{
+ nir_ssa_def *factor =
+ _nir_format_norm_factor(b, bits, f->num_components, true);
+
+ /* Clamp to the range [-1, 1] */
+ f = nir_fmin(b, nir_fmax(b, f, nir_imm_float(b, -1)), nir_imm_float(b, 1));
+
+ return nir_f2i32(b, nir_fround_even(b, nir_fmul(b, f, factor)));
+}
+
+/* Converts a vector of floats to a vector of half-floats packed in the low 16
+ * bits.
+ */
+static inline nir_ssa_def *
+nir_format_float_to_half(nir_builder *b, nir_ssa_def *f)
+{
+ nir_ssa_def *zero = nir_imm_float(b, 0);
+ nir_ssa_def *f16comps[4];
+ for (unsigned i = 0; i < f->num_components; i++)
+ f16comps[i] = nir_pack_half_2x16_split(b, nir_channel(b, f, i), zero);
+ return nir_vec(b, f16comps, f->num_components);
+}
+
+static inline nir_ssa_def *
+nir_format_linear_to_srgb(nir_builder *b, nir_ssa_def *c)
+{
+ nir_ssa_def *linear = nir_fmul(b, c, nir_imm_float(b, 12.92f));
+ nir_ssa_def *curved =
+ nir_fsub(b, nir_fmul(b, nir_imm_float(b, 1.055f),
+ nir_fpow(b, c, nir_imm_float(b, 1.0 / 2.4))),
+ nir_imm_float(b, 0.055f));
+
+ return nir_fsat(b, nir_bcsel(b, nir_flt(b, c, nir_imm_float(b, 0.0031308f)),
+ linear, curved));
+}
+
+static inline nir_ssa_def *
+nir_format_srgb_to_linear(nir_builder *b, nir_ssa_def *c)
+{
+ nir_ssa_def *linear = nir_fdiv(b, c, nir_imm_float(b, 12.92f));
+ nir_ssa_def *curved =
+ nir_fpow(b, nir_fdiv(b, nir_fadd(b, c, nir_imm_float(b, 0.055f)),
+ nir_imm_float(b, 1.055f)),
+ nir_imm_float(b, 2.4f));
+
+ return nir_fsat(b, nir_bcsel(b, nir_fge(b, nir_imm_float(b, 0.04045f), c),
+ linear, curved));
+}
+
+/* Clamps a vector of uints so they don't extend beyond the given number of
+ * bits per channel.
+ */
+static inline nir_ssa_def *
+nir_format_clamp_uint(nir_builder *b, nir_ssa_def *f, const unsigned *bits)
+{
+ if (bits[0] == 32)
+ return f;
+
+ nir_const_value max[NIR_MAX_VEC_COMPONENTS];
+ memset(max, 0, sizeof(max));
+ for (unsigned i = 0; i < f->num_components; i++) {
+ assert(bits[i] < 32);
+ max[i].u32 = (1 << bits[i]) - 1;
+ }
+ return nir_umin(b, f, nir_build_imm(b, f->num_components, 32, max));
+}
+
+/* Clamps a vector of sints so they don't extend beyond the given number of
+ * bits per channel.
+ */
+static inline nir_ssa_def *
+nir_format_clamp_sint(nir_builder *b, nir_ssa_def *f, const unsigned *bits)
+{
+ if (bits[0] == 32)
+ return f;
+
+ nir_const_value min[NIR_MAX_VEC_COMPONENTS], max[NIR_MAX_VEC_COMPONENTS];
+ memset(min, 0, sizeof(min));
+ memset(max, 0, sizeof(max));
+ for (unsigned i = 0; i < f->num_components; i++) {
+ assert(bits[i] < 32);
+ max[i].i32 = (1 << (bits[i] - 1)) - 1;
+ min[i].i32 = -(1 << (bits[i] - 1));
+ }
+ f = nir_imin(b, f, nir_build_imm(b, f->num_components, 32, max));
+ f = nir_imax(b, f, nir_build_imm(b, f->num_components, 32, min));
+
+ return f;
+}
+
+static inline nir_ssa_def *
+nir_format_unpack_11f11f10f(nir_builder *b, nir_ssa_def *packed)
+{
+ nir_ssa_def *chans[3];
+ chans[0] = nir_mask_shift(b, packed, 0x000007ff, 4);
+ chans[1] = nir_mask_shift(b, packed, 0x003ff800, -7);
+ chans[2] = nir_mask_shift(b, packed, 0xffc00000, -17);
+
+ for (unsigned i = 0; i < 3; i++)
+ chans[i] = nir_unpack_half_2x16_split_x(b, chans[i]);
+
+ return nir_vec(b, chans, 3);
+}
+
+static inline nir_ssa_def *
+nir_format_pack_11f11f10f(nir_builder *b, nir_ssa_def *color)
+{
+ /* 10 and 11-bit floats are unsigned. Clamp to non-negative */
+ nir_ssa_def *clamped = nir_fmax(b, color, nir_imm_float(b, 0));
+
+ nir_ssa_def *undef = nir_ssa_undef(b, 1, color->bit_size);
+ nir_ssa_def *p1 = nir_pack_half_2x16_split(b, nir_channel(b, clamped, 0),
+ nir_channel(b, clamped, 1));
+ nir_ssa_def *p2 = nir_pack_half_2x16_split(b, nir_channel(b, clamped, 2),
+ undef);
+
+ /* A 10 or 11-bit float has the same exponent as a 16-bit float but with
+ * fewer mantissa bits and no sign bit. All we have to do is throw away
+ * the sign bit and the bottom mantissa bits and shift it into place.
+ */
+ nir_ssa_def *packed = nir_imm_int(b, 0);
+ packed = nir_mask_shift_or(b, packed, p1, 0x00007ff0, -4);
+ packed = nir_mask_shift_or(b, packed, p1, 0x7ff00000, -9);
+ packed = nir_mask_shift_or(b, packed, p2, 0x00007fe0, 17);
+
+ return packed;
+}
+
+static inline nir_ssa_def *
+nir_format_pack_r9g9b9e5(nir_builder *b, nir_ssa_def *color)
+{
+ /* See also float3_to_rgb9e5 */
+
+ /* First, we need to clamp it to range. */
+ nir_ssa_def *clamped = nir_fmin(b, color, nir_imm_float(b, MAX_RGB9E5));
+
+ /* Get rid of negatives and NaN */
+ clamped = nir_bcsel(b, nir_ult(b, nir_imm_int(b, 0x7f800000), color),
+ nir_imm_float(b, 0), clamped);
+
+ /* maxrgb.u = MAX3(rc.u, gc.u, bc.u); */
+ nir_ssa_def *maxu = nir_umax(b, nir_channel(b, clamped, 0),
+ nir_umax(b, nir_channel(b, clamped, 1),
+ nir_channel(b, clamped, 2)));
+
+ /* maxrgb.u += maxrgb.u & (1 << (23-9)); */
+ maxu = nir_iadd(b, maxu, nir_iand(b, maxu, nir_imm_int(b, 1 << 14)));
+
+ /* exp_shared = MAX2((maxrgb.u >> 23), -RGB9E5_EXP_BIAS - 1 + 127) +
+ * 1 + RGB9E5_EXP_BIAS - 127;
+ */
+ nir_ssa_def *exp_shared =
+ nir_iadd(b, nir_umax(b, nir_ushr(b, maxu, nir_imm_int(b, 23)),
+ nir_imm_int(b, -RGB9E5_EXP_BIAS - 1 + 127)),
+ nir_imm_int(b, 1 + RGB9E5_EXP_BIAS - 127));
+
+ /* revdenom_biasedexp = 127 - (exp_shared - RGB9E5_EXP_BIAS -
+ * RGB9E5_MANTISSA_BITS) + 1;
+ */
+ nir_ssa_def *revdenom_biasedexp =
+ nir_isub(b, nir_imm_int(b, 127 + RGB9E5_EXP_BIAS +
+ RGB9E5_MANTISSA_BITS + 1),
+ exp_shared);
+
+ /* revdenom.u = revdenom_biasedexp << 23; */
+ nir_ssa_def *revdenom =
+ nir_ishl(b, revdenom_biasedexp, nir_imm_int(b, 23));
+
+ /* rm = (int) (rc.f * revdenom.f);
+ * gm = (int) (gc.f * revdenom.f);
+ * bm = (int) (bc.f * revdenom.f);
+ */
+ nir_ssa_def *mantissa =
+ nir_f2i32(b, nir_fmul(b, clamped, revdenom));
+
+ /* rm = (rm & 1) + (rm >> 1);
+ * gm = (gm & 1) + (gm >> 1);
+ * bm = (bm & 1) + (bm >> 1);
+ */
+ mantissa = nir_iadd(b, nir_iand(b, mantissa, nir_imm_int(b, 1)),
+ nir_ushr(b, mantissa, nir_imm_int(b, 1)));
+
+ nir_ssa_def *packed = nir_channel(b, mantissa, 0);
+ packed = nir_mask_shift_or(b, packed, nir_channel(b, mantissa, 1), ~0, 9);
+ packed = nir_mask_shift_or(b, packed, nir_channel(b, mantissa, 2), ~0, 18);
+ packed = nir_mask_shift_or(b, packed, exp_shared, ~0, 27);
+
+ return packed;
}
projects / mesa.git / blobdiff