#include "nir.h"
#include "nir_builder.h"
+#define COND_LOWER_OP(b, name, ...) \
+ (b->shader->options->lower_int64_options & \
+ nir_lower_int64_op_to_options_mask(nir_op_##name)) ? \
+ lower_##name##64(b, __VA_ARGS__) : nir_##name(b, __VA_ARGS__)
+
+#define COND_LOWER_CMP(b, name, ...) \
+ (b->shader->options->lower_int64_options & \
+ nir_lower_int64_op_to_options_mask(nir_op_##name)) ? \
+ lower_int64_compare(b, nir_op_##name, __VA_ARGS__) : \
+ nir_##name(b, __VA_ARGS__)
+
+#define COND_LOWER_CAST(b, name, ...) \
+ (b->shader->options->lower_int64_options & \
+ nir_lower_int64_op_to_options_mask(nir_op_##name)) ? \
+ lower_##name(b, __VA_ARGS__) : \
+ nir_##name(b, __VA_ARGS__)
+
+static nir_ssa_def *
+lower_b2i64(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_pack_64_2x32_split(b, nir_b2i32(b, x), nir_imm_int(b, 0));
+}
+
+static nir_ssa_def *
+lower_i2b(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_ine(b, nir_ior(b, nir_unpack_64_2x32_split_x(b, x),
+ nir_unpack_64_2x32_split_y(b, x)),
+ nir_imm_int(b, 0));
+}
+
+static nir_ssa_def *
+lower_i2i8(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_i2i8(b, nir_unpack_64_2x32_split_x(b, x));
+}
+
+static nir_ssa_def *
+lower_i2i16(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_i2i16(b, nir_unpack_64_2x32_split_x(b, x));
+}
+
+
+static nir_ssa_def *
+lower_i2i32(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_unpack_64_2x32_split_x(b, x);
+}
+
+static nir_ssa_def *
+lower_i2i64(nir_builder *b, nir_ssa_def *x)
+{
+ nir_ssa_def *x32 = x->bit_size == 32 ? x : nir_i2i32(b, x);
+ return nir_pack_64_2x32_split(b, x32, nir_ishr_imm(b, x32, 31));
+}
+
+static nir_ssa_def *
+lower_u2u8(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_u2u8(b, nir_unpack_64_2x32_split_x(b, x));
+}
+
+static nir_ssa_def *
+lower_u2u16(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_u2u16(b, nir_unpack_64_2x32_split_x(b, x));
+}
+
+static nir_ssa_def *
+lower_u2u32(nir_builder *b, nir_ssa_def *x)
+{
+ return nir_unpack_64_2x32_split_x(b, x);
+}
+
+static nir_ssa_def *
+lower_u2u64(nir_builder *b, nir_ssa_def *x)
+{
+ nir_ssa_def *x32 = x->bit_size == 32 ? x : nir_u2u32(b, x);
+ return nir_pack_64_2x32_split(b, x32, nir_imm_int(b, 0));
+}
+
+static nir_ssa_def *
+lower_bcsel64(nir_builder *b, nir_ssa_def *cond, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ return nir_pack_64_2x32_split(b, nir_bcsel(b, cond, x_lo, y_lo),
+ nir_bcsel(b, cond, x_hi, y_hi));
+}
+
+static nir_ssa_def *
+lower_inot64(nir_builder *b, nir_ssa_def *x)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+
+ return nir_pack_64_2x32_split(b, nir_inot(b, x_lo), nir_inot(b, x_hi));
+}
+
+static nir_ssa_def *
+lower_iand64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ return nir_pack_64_2x32_split(b, nir_iand(b, x_lo, y_lo),
+ nir_iand(b, x_hi, y_hi));
+}
+
+static nir_ssa_def *
+lower_ior64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ return nir_pack_64_2x32_split(b, nir_ior(b, x_lo, y_lo),
+ nir_ior(b, x_hi, y_hi));
+}
+
+static nir_ssa_def *
+lower_ixor64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ return nir_pack_64_2x32_split(b, nir_ixor(b, x_lo, y_lo),
+ nir_ixor(b, x_hi, y_hi));
+}
+
+static nir_ssa_def *
+lower_ishl64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ /* Implemented as
+ *
+ * uint64_t lshift(uint64_t x, int c)
+ * {
+ * if (c == 0) return x;
+ *
+ * uint32_t lo = LO(x), hi = HI(x);
+ *
+ * if (c < 32) {
+ * uint32_t lo_shifted = lo << c;
+ * uint32_t hi_shifted = hi << c;
+ * uint32_t lo_shifted_hi = lo >> abs(32 - c);
+ * return pack_64(lo_shifted, hi_shifted | lo_shifted_hi);
+ * } else {
+ * uint32_t lo_shifted_hi = lo << abs(32 - c);
+ * return pack_64(0, lo_shifted_hi);
+ * }
+ * }
+ */
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+
+ nir_ssa_def *reverse_count = nir_iabs(b, nir_iadd(b, y, nir_imm_int(b, -32)));
+ nir_ssa_def *lo_shifted = nir_ishl(b, x_lo, y);
+ nir_ssa_def *hi_shifted = nir_ishl(b, x_hi, y);
+ nir_ssa_def *lo_shifted_hi = nir_ushr(b, x_lo, reverse_count);
+
+ nir_ssa_def *res_if_lt_32 =
+ nir_pack_64_2x32_split(b, lo_shifted,
+ nir_ior(b, hi_shifted, lo_shifted_hi));
+ nir_ssa_def *res_if_ge_32 =
+ nir_pack_64_2x32_split(b, nir_imm_int(b, 0),
+ nir_ishl(b, x_lo, reverse_count));
+
+ return nir_bcsel(b,
+ nir_ieq(b, y, nir_imm_int(b, 0)), x,
+ nir_bcsel(b, nir_uge(b, y, nir_imm_int(b, 32)),
+ res_if_ge_32, res_if_lt_32));
+}
+
+static nir_ssa_def *
+lower_ishr64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ /* Implemented as
+ *
+ * uint64_t arshift(uint64_t x, int c)
+ * {
+ * if (c == 0) return x;
+ *
+ * uint32_t lo = LO(x);
+ * int32_t hi = HI(x);
+ *
+ * if (c < 32) {
+ * uint32_t lo_shifted = lo >> c;
+ * uint32_t hi_shifted = hi >> c;
+ * uint32_t hi_shifted_lo = hi << abs(32 - c);
+ * return pack_64(hi_shifted, hi_shifted_lo | lo_shifted);
+ * } else {
+ * uint32_t hi_shifted = hi >> 31;
+ * uint32_t hi_shifted_lo = hi >> abs(32 - c);
+ * return pack_64(hi_shifted, hi_shifted_lo);
+ * }
+ * }
+ */
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+
+ nir_ssa_def *reverse_count = nir_iabs(b, nir_iadd(b, y, nir_imm_int(b, -32)));
+ nir_ssa_def *lo_shifted = nir_ushr(b, x_lo, y);
+ nir_ssa_def *hi_shifted = nir_ishr(b, x_hi, y);
+ nir_ssa_def *hi_shifted_lo = nir_ishl(b, x_hi, reverse_count);
+
+ nir_ssa_def *res_if_lt_32 =
+ nir_pack_64_2x32_split(b, nir_ior(b, lo_shifted, hi_shifted_lo),
+ hi_shifted);
+ nir_ssa_def *res_if_ge_32 =
+ nir_pack_64_2x32_split(b, nir_ishr(b, x_hi, reverse_count),
+ nir_ishr(b, x_hi, nir_imm_int(b, 31)));
+
+ return nir_bcsel(b,
+ nir_ieq(b, y, nir_imm_int(b, 0)), x,
+ nir_bcsel(b, nir_uge(b, y, nir_imm_int(b, 32)),
+ res_if_ge_32, res_if_lt_32));
+}
+
+static nir_ssa_def *
+lower_ushr64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ /* Implemented as
+ *
+ * uint64_t rshift(uint64_t x, int c)
+ * {
+ * if (c == 0) return x;
+ *
+ * uint32_t lo = LO(x), hi = HI(x);
+ *
+ * if (c < 32) {
+ * uint32_t lo_shifted = lo >> c;
+ * uint32_t hi_shifted = hi >> c;
+ * uint32_t hi_shifted_lo = hi << abs(32 - c);
+ * return pack_64(hi_shifted, hi_shifted_lo | lo_shifted);
+ * } else {
+ * uint32_t hi_shifted_lo = hi >> abs(32 - c);
+ * return pack_64(0, hi_shifted_lo);
+ * }
+ * }
+ */
+
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+
+ nir_ssa_def *reverse_count = nir_iabs(b, nir_iadd(b, y, nir_imm_int(b, -32)));
+ nir_ssa_def *lo_shifted = nir_ushr(b, x_lo, y);
+ nir_ssa_def *hi_shifted = nir_ushr(b, x_hi, y);
+ nir_ssa_def *hi_shifted_lo = nir_ishl(b, x_hi, reverse_count);
+
+ nir_ssa_def *res_if_lt_32 =
+ nir_pack_64_2x32_split(b, nir_ior(b, lo_shifted, hi_shifted_lo),
+ hi_shifted);
+ nir_ssa_def *res_if_ge_32 =
+ nir_pack_64_2x32_split(b, nir_ushr(b, x_hi, reverse_count),
+ nir_imm_int(b, 0));
+
+ return nir_bcsel(b,
+ nir_ieq(b, y, nir_imm_int(b, 0)), x,
+ nir_bcsel(b, nir_uge(b, y, nir_imm_int(b, 32)),
+ res_if_ge_32, res_if_lt_32));
+}
+
+static nir_ssa_def *
+lower_iadd64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ nir_ssa_def *res_lo = nir_iadd(b, x_lo, y_lo);
+ nir_ssa_def *carry = nir_b2i32(b, nir_ult(b, res_lo, x_lo));
+ nir_ssa_def *res_hi = nir_iadd(b, carry, nir_iadd(b, x_hi, y_hi));
+
+ return nir_pack_64_2x32_split(b, res_lo, res_hi);
+}
+
+static nir_ssa_def *
+lower_isub64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ nir_ssa_def *res_lo = nir_isub(b, x_lo, y_lo);
+ nir_ssa_def *borrow = nir_ineg(b, nir_b2i32(b, nir_ult(b, x_lo, y_lo)));
+ nir_ssa_def *res_hi = nir_iadd(b, nir_isub(b, x_hi, y_hi), borrow);
+
+ return nir_pack_64_2x32_split(b, res_lo, res_hi);
+}
+
+static nir_ssa_def *
+lower_ineg64(nir_builder *b, nir_ssa_def *x)
+{
+ /* Since isub is the same number of instructions (with better dependencies)
+ * as iadd, subtraction is actually more efficient for ineg than the usual
+ * 2's complement "flip the bits and add one".
+ */
+ return lower_isub64(b, nir_imm_int64(b, 0), x);
+}
+
+static nir_ssa_def *
+lower_iabs64(nir_builder *b, nir_ssa_def *x)
+{
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *x_is_neg = nir_ilt(b, x_hi, nir_imm_int(b, 0));
+ return nir_bcsel(b, x_is_neg, nir_ineg(b, x), x);
+}
+
static nir_ssa_def *
-lower_umul64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+lower_int64_compare(nir_builder *b, nir_op op, nir_ssa_def *x, nir_ssa_def *y)
{
nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
- nir_ssa_def *res_lo = nir_imul(b, x_lo, y_lo);
- nir_ssa_def *res_hi = nir_iadd(b, nir_umul_high(b, x_lo, y_lo),
+ switch (op) {
+ case nir_op_ieq:
+ return nir_iand(b, nir_ieq(b, x_hi, y_hi), nir_ieq(b, x_lo, y_lo));
+ case nir_op_ine:
+ return nir_ior(b, nir_ine(b, x_hi, y_hi), nir_ine(b, x_lo, y_lo));
+ case nir_op_ult:
+ return nir_ior(b, nir_ult(b, x_hi, y_hi),
+ nir_iand(b, nir_ieq(b, x_hi, y_hi),
+ nir_ult(b, x_lo, y_lo)));
+ case nir_op_ilt:
+ return nir_ior(b, nir_ilt(b, x_hi, y_hi),
+ nir_iand(b, nir_ieq(b, x_hi, y_hi),
+ nir_ult(b, x_lo, y_lo)));
+ break;
+ case nir_op_uge:
+ /* Lower as !(x < y) in the hopes of better CSE */
+ return nir_inot(b, lower_int64_compare(b, nir_op_ult, x, y));
+ case nir_op_ige:
+ /* Lower as !(x < y) in the hopes of better CSE */
+ return nir_inot(b, lower_int64_compare(b, nir_op_ilt, x, y));
+ default:
+ unreachable("Invalid comparison");
+ }
+}
+
+static nir_ssa_def *
+lower_umax64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ return nir_bcsel(b, lower_int64_compare(b, nir_op_ult, x, y), y, x);
+}
+
+static nir_ssa_def *
+lower_imax64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ return nir_bcsel(b, lower_int64_compare(b, nir_op_ilt, x, y), y, x);
+}
+
+static nir_ssa_def *
+lower_umin64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ return nir_bcsel(b, lower_int64_compare(b, nir_op_ult, x, y), x, y);
+}
+
+static nir_ssa_def *
+lower_imin64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ return nir_bcsel(b, lower_int64_compare(b, nir_op_ilt, x, y), x, y);
+}
+
+static nir_ssa_def *
+lower_mul_2x32_64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y,
+ bool sign_extend)
+{
+ nir_ssa_def *res_hi = sign_extend ? nir_imul_high(b, x, y)
+ : nir_umul_high(b, x, y);
+
+ return nir_pack_64_2x32_split(b, nir_imul(b, x, y), res_hi);
+}
+
+static nir_ssa_def *
+lower_imul64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *y_lo = nir_unpack_64_2x32_split_x(b, y);
+ nir_ssa_def *y_hi = nir_unpack_64_2x32_split_y(b, y);
+
+ nir_ssa_def *mul_lo = nir_umul_2x32_64(b, x_lo, y_lo);
+ nir_ssa_def *res_hi = nir_iadd(b, nir_unpack_64_2x32_split_y(b, mul_lo),
nir_iadd(b, nir_imul(b, x_lo, y_hi),
nir_imul(b, x_hi, y_lo)));
- return nir_pack_64_2x32_split(b, res_lo, res_hi);
+ return nir_pack_64_2x32_split(b, nir_unpack_64_2x32_split_x(b, mul_lo),
+ res_hi);
+}
+
+static nir_ssa_def *
+lower_mul_high64(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y,
+ bool sign_extend)
+{
+ nir_ssa_def *x32[4], *y32[4];
+ x32[0] = nir_unpack_64_2x32_split_x(b, x);
+ x32[1] = nir_unpack_64_2x32_split_y(b, x);
+ if (sign_extend) {
+ x32[2] = x32[3] = nir_ishr_imm(b, x32[1], 31);
+ } else {
+ x32[2] = x32[3] = nir_imm_int(b, 0);
+ }
+
+ y32[0] = nir_unpack_64_2x32_split_x(b, y);
+ y32[1] = nir_unpack_64_2x32_split_y(b, y);
+ if (sign_extend) {
+ y32[2] = y32[3] = nir_ishr_imm(b, y32[1], 31);
+ } else {
+ y32[2] = y32[3] = nir_imm_int(b, 0);
+ }
+
+ nir_ssa_def *res[8] = { NULL, };
+
+ /* Yes, the following generates a pile of code. However, we throw res[0]
+ * and res[1] away in the end and, if we're in the umul case, four of our
+ * eight dword operands will be constant zero and opt_algebraic will clean
+ * this up nicely.
+ */
+ for (unsigned i = 0; i < 4; i++) {
+ nir_ssa_def *carry = NULL;
+ for (unsigned j = 0; j < 4; j++) {
+ /* The maximum values of x32[i] and y32[i] are UINT32_MAX so the
+ * maximum value of tmp is UINT32_MAX * UINT32_MAX. The maximum
+ * value that will fit in tmp is
+ *
+ * UINT64_MAX = UINT32_MAX << 32 + UINT32_MAX
+ * = UINT32_MAX * (UINT32_MAX + 1) + UINT32_MAX
+ * = UINT32_MAX * UINT32_MAX + 2 * UINT32_MAX
+ *
+ * so we're guaranteed that we can add in two more 32-bit values
+ * without overflowing tmp.
+ */
+ nir_ssa_def *tmp = nir_umul_2x32_64(b, x32[i], y32[i]);
+
+ if (res[i + j])
+ tmp = nir_iadd(b, tmp, nir_u2u64(b, res[i + j]));
+ if (carry)
+ tmp = nir_iadd(b, tmp, carry);
+ res[i + j] = nir_u2u32(b, tmp);
+ carry = nir_ushr_imm(b, tmp, 32);
+ }
+ res[i + 4] = nir_u2u32(b, carry);
+ }
+
+ return nir_pack_64_2x32_split(b, res[2], res[3]);
}
static nir_ssa_def *
nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
nir_ssa_def *is_non_zero = nir_i2b(b, nir_ior(b, x_lo, x_hi));
- nir_ssa_def *res_hi = nir_ishr(b, x_hi, nir_imm_int(b, 31));
- nir_ssa_def *res_lo = nir_ior(b, res_hi, nir_b2i(b, is_non_zero));
+ nir_ssa_def *res_hi = nir_ishr_imm(b, x_hi, 31);
+ nir_ssa_def *res_lo = nir_ior(b, res_hi, nir_b2i32(b, is_non_zero));
return nir_pack_64_2x32_split(b, res_lo, res_hi);
}
nir_ssa_def *d_lo = nir_unpack_64_2x32_split_x(b, d);
nir_ssa_def *d_hi = nir_unpack_64_2x32_split_y(b, d);
- nir_const_value v = { .u32 = { 0, 0, 0, 0 } };
- nir_ssa_def *q_lo = nir_build_imm(b, n->num_components, 32, v);
- nir_ssa_def *q_hi = nir_build_imm(b, n->num_components, 32, v);
+ nir_ssa_def *q_lo = nir_imm_zero(b, n->num_components, 32);
+ nir_ssa_def *q_hi = nir_imm_zero(b, n->num_components, 32);
nir_ssa_def *n_hi_before_if = n_hi;
nir_ssa_def *q_hi_before_if = q_hi;
* this is always true within the if statement.
*/
if (n->num_components == 1)
- need_high_div = nir_imm_int(b, NIR_TRUE);
+ need_high_div = nir_imm_true(b);
nir_ssa_def *log2_d_lo = nir_ufind_msb(b, d_lo);
{
nir_ssa_def *n_hi = nir_unpack_64_2x32_split_y(b, n);
nir_ssa_def *d_hi = nir_unpack_64_2x32_split_y(b, d);
+ nir_ssa_def *n_is_neg = nir_ilt(b, n_hi, nir_imm_int(b, 0));
+ nir_ssa_def *d_is_neg = nir_ilt(b, d_hi, nir_imm_int(b, 0));
- nir_ssa_def *negate = nir_ine(b, nir_ilt(b, n_hi, nir_imm_int(b, 0)),
- nir_ilt(b, d_hi, nir_imm_int(b, 0)));
nir_ssa_def *q, *r;
lower_udiv64_mod64(b, nir_iabs(b, n), nir_iabs(b, d), &q, &r);
- return nir_bcsel(b, negate, nir_ineg(b, r), r);
+
+ nir_ssa_def *rem = nir_bcsel(b, n_is_neg, nir_ineg(b, r), r);
+
+ return nir_bcsel(b, nir_ieq(b, r, nir_imm_int64(b, 0)), nir_imm_int64(b, 0),
+ nir_bcsel(b, nir_ieq(b, n_is_neg, d_is_neg), rem,
+ nir_iadd(b, rem, d)));
}
-static bool
-lower_int64_impl(nir_function_impl *impl, nir_lower_int64_options options)
-{
- nir_builder b;
- nir_builder_init(&b, impl);
-
- bool progress = false;
- nir_foreach_block(block, impl) {
- nir_foreach_instr_safe(instr, block) {
- if (instr->type != nir_instr_type_alu)
- continue;
-
- nir_alu_instr *alu = nir_instr_as_alu(instr);
- assert(alu->dest.dest.is_ssa);
- if (alu->dest.dest.ssa.bit_size != 64)
- continue;
-
- b.cursor = nir_before_instr(instr);
-
- nir_ssa_def *new_def = NULL;
- switch (alu->op) {
- case nir_op_imul:
- if (options & nir_lower_imul64) {
- new_def = lower_umul64(&b, nir_ssa_for_alu_src(&b, alu, 0),
- nir_ssa_for_alu_src(&b, alu, 1));
- }
- break;
-
- case nir_op_isign:
- if (options & nir_lower_isign64)
- new_def = lower_isign64(&b, nir_ssa_for_alu_src(&b, alu, 0));
- break;
-
- case nir_op_udiv:
- if (options & nir_lower_divmod64) {
- new_def = lower_udiv64(&b, nir_ssa_for_alu_src(&b, alu, 0),
- nir_ssa_for_alu_src(&b, alu, 1));
- }
- break;
-
- case nir_op_idiv:
- if (options & nir_lower_divmod64) {
- new_def = lower_idiv64(&b, nir_ssa_for_alu_src(&b, alu, 0),
- nir_ssa_for_alu_src(&b, alu, 1));
- }
- break;
-
- case nir_op_umod:
- if (options & nir_lower_divmod64) {
- new_def = lower_umod64(&b, nir_ssa_for_alu_src(&b, alu, 0),
- nir_ssa_for_alu_src(&b, alu, 1));
- }
- break;
-
- case nir_op_imod:
- if (options & nir_lower_divmod64) {
- new_def = lower_imod64(&b, nir_ssa_for_alu_src(&b, alu, 0),
- nir_ssa_for_alu_src(&b, alu, 1));
- }
- break;
-
- default:
- /* Not lowered */
- continue;
- }
+static nir_ssa_def *
+lower_irem64(nir_builder *b, nir_ssa_def *n, nir_ssa_def *d)
+{
+ nir_ssa_def *n_hi = nir_unpack_64_2x32_split_y(b, n);
+ nir_ssa_def *n_is_neg = nir_ilt(b, n_hi, nir_imm_int(b, 0));
- if (new_def) {
- nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa,
- nir_src_for_ssa(new_def));
- nir_instr_remove(&alu->instr);
- progress = true;
- }
- }
+ nir_ssa_def *q, *r;
+ lower_udiv64_mod64(b, nir_iabs(b, n), nir_iabs(b, d), &q, &r);
+ return nir_bcsel(b, n_is_neg, nir_ineg(b, r), r);
+}
+
+static nir_ssa_def *
+lower_extract(nir_builder *b, nir_op op, nir_ssa_def *x, nir_ssa_def *c)
+{
+ assert(op == nir_op_extract_u8 || op == nir_op_extract_i8 ||
+ op == nir_op_extract_u16 || op == nir_op_extract_i16);
+
+ const int chunk = nir_src_as_uint(nir_src_for_ssa(c));
+ const int chunk_bits =
+ (op == nir_op_extract_u8 || op == nir_op_extract_i8) ? 8 : 16;
+ const int num_chunks_in_32 = 32 / chunk_bits;
+
+ nir_ssa_def *extract32;
+ if (chunk < num_chunks_in_32) {
+ extract32 = nir_build_alu(b, op, nir_unpack_64_2x32_split_x(b, x),
+ nir_imm_int(b, chunk),
+ NULL, NULL);
+ } else {
+ extract32 = nir_build_alu(b, op, nir_unpack_64_2x32_split_y(b, x),
+ nir_imm_int(b, chunk - num_chunks_in_32),
+ NULL, NULL);
}
- return progress;
+ if (op == nir_op_extract_i8 || op == nir_op_extract_i16)
+ return lower_i2i64(b, extract32);
+ else
+ return lower_u2u64(b, extract32);
}
-bool
-nir_lower_int64(nir_shader *shader, nir_lower_int64_options options)
+static nir_ssa_def *
+lower_ufind_msb64(nir_builder *b, nir_ssa_def *x)
+{
+
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *lo_count = nir_ufind_msb(b, x_lo);
+ nir_ssa_def *hi_count = nir_ufind_msb(b, x_hi);
+ nir_ssa_def *valid_hi_bits = nir_ine(b, x_hi, nir_imm_int(b, 0));
+ nir_ssa_def *hi_res = nir_iadd(b, nir_imm_intN_t(b, 32, 32), hi_count);
+ return nir_bcsel(b, valid_hi_bits, hi_res, lo_count);
+}
+
+static nir_ssa_def *
+lower_2f(nir_builder *b, nir_ssa_def *x, unsigned dest_bit_size,
+ bool src_is_signed)
{
- bool progress = false;
+ nir_ssa_def *x_sign = NULL;
- nir_foreach_function(function, shader) {
- if (function->impl)
- progress |= lower_int64_impl(function->impl, options);
+ if (src_is_signed) {
+ x_sign = nir_bcsel(b, COND_LOWER_CMP(b, ilt, x, nir_imm_int64(b, 0)),
+ nir_imm_floatN_t(b, -1, dest_bit_size),
+ nir_imm_floatN_t(b, 1, dest_bit_size));
+ x = COND_LOWER_OP(b, iabs, x);
}
- return progress;
+ nir_ssa_def *exp = COND_LOWER_OP(b, ufind_msb, x);
+ unsigned significand_bits;
+
+ switch (dest_bit_size) {
+ case 32:
+ significand_bits = 23;
+ break;
+ case 16:
+ significand_bits = 10;
+ break;
+ default:
+ unreachable("Invalid dest_bit_size");
+ }
+
+ nir_ssa_def *discard =
+ nir_imax(b, nir_isub(b, exp, nir_imm_int(b, significand_bits)),
+ nir_imm_int(b, 0));
+ nir_ssa_def *significand =
+ COND_LOWER_CAST(b, u2u32, COND_LOWER_OP(b, ushr, x, discard));
+
+ /* Round-to-nearest-even implementation:
+ * - if the non-representable part of the significand is higher than half
+ * the minimum representable significand, we round-up
+ * - if the non-representable part of the significand is equal to half the
+ * minimum representable significand and the representable part of the
+ * significand is odd, we round-up
+ * - in any other case, we round-down
+ */
+ nir_ssa_def *lsb_mask = COND_LOWER_OP(b, ishl, nir_imm_int64(b, 1), discard);
+ nir_ssa_def *rem_mask = COND_LOWER_OP(b, isub, lsb_mask, nir_imm_int64(b, 1));
+ nir_ssa_def *half = COND_LOWER_OP(b, ishr, lsb_mask, nir_imm_int(b, 1));
+ nir_ssa_def *rem = COND_LOWER_OP(b, iand, x, rem_mask);
+ nir_ssa_def *halfway = nir_iand(b, COND_LOWER_CMP(b, ieq, rem, half),
+ nir_ine(b, discard, nir_imm_int(b, 0)));
+ nir_ssa_def *is_odd = nir_i2b(b, nir_iand(b, significand, nir_imm_int(b, 1)));
+ nir_ssa_def *round_up = nir_ior(b, COND_LOWER_CMP(b, ilt, half, rem),
+ nir_iand(b, halfway, is_odd));
+ significand = nir_iadd(b, significand, nir_b2i32(b, round_up));
+
+ nir_ssa_def *res;
+
+ if (dest_bit_size == 32)
+ res = nir_fmul(b, nir_u2f32(b, significand),
+ nir_fexp2(b, nir_u2f32(b, discard)));
+ else
+ res = nir_fmul(b, nir_u2f16(b, significand),
+ nir_fexp2(b, nir_u2f16(b, discard)));
+
+ if (src_is_signed)
+ res = nir_fmul(b, res, x_sign);
+
+ return res;
+}
+
+static nir_ssa_def *
+lower_f2(nir_builder *b, nir_ssa_def *x, bool dst_is_signed)
+{
+ assert(x->bit_size == 16 || x->bit_size == 32);
+ nir_ssa_def *x_sign = NULL;
+
+ if (dst_is_signed)
+ x_sign = nir_fsign(b, x);
+ else
+ x = nir_fmin(b, x, nir_imm_floatN_t(b, UINT64_MAX, x->bit_size));
+
+ x = nir_ftrunc(b, x);
+
+ if (dst_is_signed) {
+ x = nir_fmin(b, x, nir_imm_floatN_t(b, INT64_MAX, x->bit_size));
+ x = nir_fmax(b, x, nir_imm_floatN_t(b, INT64_MIN, x->bit_size));
+ x = nir_fabs(b, x);
+ }
+
+ nir_ssa_def *div = nir_imm_floatN_t(b, 1ULL << 32, x->bit_size);
+ nir_ssa_def *res_hi = nir_f2u32(b, nir_fdiv(b, x, div));
+ nir_ssa_def *res_lo = nir_f2u32(b, nir_frem(b, x, div));
+ nir_ssa_def *res = nir_pack_64_2x32_split(b, res_lo, res_hi);
+
+ if (dst_is_signed)
+ res = nir_bcsel(b, nir_flt(b, x_sign, nir_imm_float(b, 0)),
+ nir_ineg(b, res), res);
+
+ return res;
+}
+
+static nir_ssa_def *
+lower_bit_count64(nir_builder *b, nir_ssa_def *x)
+{
+ nir_ssa_def *x_lo = nir_unpack_64_2x32_split_x(b, x);
+ nir_ssa_def *x_hi = nir_unpack_64_2x32_split_y(b, x);
+ nir_ssa_def *lo_count = nir_bit_count(b, x_lo);
+ nir_ssa_def *hi_count = nir_bit_count(b, x_hi);
+ return nir_iadd(b, lo_count, hi_count);
+}
+
+nir_lower_int64_options
+nir_lower_int64_op_to_options_mask(nir_op opcode)
+{
+ switch (opcode) {
+ case nir_op_imul:
+ case nir_op_amul:
+ return nir_lower_imul64;
+ case nir_op_imul_2x32_64:
+ case nir_op_umul_2x32_64:
+ return nir_lower_imul_2x32_64;
+ case nir_op_imul_high:
+ case nir_op_umul_high:
+ return nir_lower_imul_high64;
+ case nir_op_isign:
+ return nir_lower_isign64;
+ case nir_op_udiv:
+ case nir_op_idiv:
+ case nir_op_umod:
+ case nir_op_imod:
+ case nir_op_irem:
+ return nir_lower_divmod64;
+ case nir_op_b2i64:
+ case nir_op_i2b1:
+ case nir_op_i2i8:
+ case nir_op_i2i16:
+ case nir_op_i2i32:
+ case nir_op_i2i64:
+ case nir_op_u2u8:
+ case nir_op_u2u16:
+ case nir_op_u2u32:
+ case nir_op_u2u64:
+ case nir_op_i2f32:
+ case nir_op_u2f32:
+ case nir_op_i2f16:
+ case nir_op_u2f16:
+ case nir_op_f2i64:
+ case nir_op_f2u64:
+ case nir_op_bcsel:
+ return nir_lower_mov64;
+ case nir_op_ieq:
+ case nir_op_ine:
+ case nir_op_ult:
+ case nir_op_ilt:
+ case nir_op_uge:
+ case nir_op_ige:
+ return nir_lower_icmp64;
+ case nir_op_iadd:
+ case nir_op_isub:
+ return nir_lower_iadd64;
+ case nir_op_imin:
+ case nir_op_imax:
+ case nir_op_umin:
+ case nir_op_umax:
+ return nir_lower_minmax64;
+ case nir_op_iabs:
+ return nir_lower_iabs64;
+ case nir_op_ineg:
+ return nir_lower_ineg64;
+ case nir_op_iand:
+ case nir_op_ior:
+ case nir_op_ixor:
+ case nir_op_inot:
+ return nir_lower_logic64;
+ case nir_op_ishl:
+ case nir_op_ishr:
+ case nir_op_ushr:
+ return nir_lower_shift64;
+ case nir_op_extract_u8:
+ case nir_op_extract_i8:
+ case nir_op_extract_u16:
+ case nir_op_extract_i16:
+ return nir_lower_extract64;
+ case nir_op_ufind_msb:
+ return nir_lower_ufind_msb64;
+ case nir_op_bit_count:
+ return nir_lower_bit_count64;
+ default:
+ return 0;
+ }
+}
+
+static nir_ssa_def *
+lower_int64_alu_instr(nir_builder *b, nir_instr *instr, void *_state)
+{
+ nir_alu_instr *alu = nir_instr_as_alu(instr);
+
+ nir_ssa_def *src[4];
+ for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++)
+ src[i] = nir_ssa_for_alu_src(b, alu, i);
+
+ switch (alu->op) {
+ case nir_op_imul:
+ case nir_op_amul:
+ return lower_imul64(b, src[0], src[1]);
+ case nir_op_imul_2x32_64:
+ return lower_mul_2x32_64(b, src[0], src[1], true);
+ case nir_op_umul_2x32_64:
+ return lower_mul_2x32_64(b, src[0], src[1], false);
+ case nir_op_imul_high:
+ return lower_mul_high64(b, src[0], src[1], true);
+ case nir_op_umul_high:
+ return lower_mul_high64(b, src[0], src[1], false);
+ case nir_op_isign:
+ return lower_isign64(b, src[0]);
+ case nir_op_udiv:
+ return lower_udiv64(b, src[0], src[1]);
+ case nir_op_idiv:
+ return lower_idiv64(b, src[0], src[1]);
+ case nir_op_umod:
+ return lower_umod64(b, src[0], src[1]);
+ case nir_op_imod:
+ return lower_imod64(b, src[0], src[1]);
+ case nir_op_irem:
+ return lower_irem64(b, src[0], src[1]);
+ case nir_op_b2i64:
+ return lower_b2i64(b, src[0]);
+ case nir_op_i2b1:
+ return lower_i2b(b, src[0]);
+ case nir_op_i2i8:
+ return lower_i2i8(b, src[0]);
+ case nir_op_i2i16:
+ return lower_i2i16(b, src[0]);
+ case nir_op_i2i32:
+ return lower_i2i32(b, src[0]);
+ case nir_op_i2i64:
+ return lower_i2i64(b, src[0]);
+ case nir_op_u2u8:
+ return lower_u2u8(b, src[0]);
+ case nir_op_u2u16:
+ return lower_u2u16(b, src[0]);
+ case nir_op_u2u32:
+ return lower_u2u32(b, src[0]);
+ case nir_op_u2u64:
+ return lower_u2u64(b, src[0]);
+ case nir_op_bcsel:
+ return lower_bcsel64(b, src[0], src[1], src[2]);
+ case nir_op_ieq:
+ case nir_op_ine:
+ case nir_op_ult:
+ case nir_op_ilt:
+ case nir_op_uge:
+ case nir_op_ige:
+ return lower_int64_compare(b, alu->op, src[0], src[1]);
+ case nir_op_iadd:
+ return lower_iadd64(b, src[0], src[1]);
+ case nir_op_isub:
+ return lower_isub64(b, src[0], src[1]);
+ case nir_op_imin:
+ return lower_imin64(b, src[0], src[1]);
+ case nir_op_imax:
+ return lower_imax64(b, src[0], src[1]);
+ case nir_op_umin:
+ return lower_umin64(b, src[0], src[1]);
+ case nir_op_umax:
+ return lower_umax64(b, src[0], src[1]);
+ case nir_op_iabs:
+ return lower_iabs64(b, src[0]);
+ case nir_op_ineg:
+ return lower_ineg64(b, src[0]);
+ case nir_op_iand:
+ return lower_iand64(b, src[0], src[1]);
+ case nir_op_ior:
+ return lower_ior64(b, src[0], src[1]);
+ case nir_op_ixor:
+ return lower_ixor64(b, src[0], src[1]);
+ case nir_op_inot:
+ return lower_inot64(b, src[0]);
+ case nir_op_ishl:
+ return lower_ishl64(b, src[0], src[1]);
+ case nir_op_ishr:
+ return lower_ishr64(b, src[0], src[1]);
+ case nir_op_ushr:
+ return lower_ushr64(b, src[0], src[1]);
+ case nir_op_extract_u8:
+ case nir_op_extract_i8:
+ case nir_op_extract_u16:
+ case nir_op_extract_i16:
+ return lower_extract(b, alu->op, src[0], src[1]);
+ case nir_op_ufind_msb:
+ return lower_ufind_msb64(b, src[0]);
+ case nir_op_bit_count:
+ return lower_bit_count64(b, src[0]);
+ case nir_op_i2f64:
+ case nir_op_i2f32:
+ case nir_op_i2f16:
+ return lower_2f(b, src[0], nir_dest_bit_size(alu->dest.dest), true);
+ case nir_op_u2f64:
+ case nir_op_u2f32:
+ case nir_op_u2f16:
+ return lower_2f(b, src[0], nir_dest_bit_size(alu->dest.dest), false);
+ case nir_op_f2i64:
+ case nir_op_f2u64:
+ /* We don't support f64toi64 (yet?). */
+ if (src[0]->bit_size > 32)
+ return false;
+
+ return lower_f2(b, src[0], alu->op == nir_op_f2i64);
+ default:
+ unreachable("Invalid ALU opcode to lower");
+ }
+}
+
+static bool
+should_lower_int64_alu_instr(const nir_instr *instr, const void *_data)
+{
+ const nir_shader_compiler_options *options =
+ (const nir_shader_compiler_options *)_data;
+
+ if (instr->type != nir_instr_type_alu)
+ return false;
+
+ const nir_alu_instr *alu = nir_instr_as_alu(instr);
+
+ switch (alu->op) {
+ case nir_op_i2b1:
+ case nir_op_i2i8:
+ case nir_op_i2i16:
+ case nir_op_i2i32:
+ case nir_op_u2u8:
+ case nir_op_u2u16:
+ case nir_op_u2u32:
+ assert(alu->src[0].src.is_ssa);
+ if (alu->src[0].src.ssa->bit_size != 64)
+ return false;
+ break;
+ case nir_op_bcsel:
+ assert(alu->src[1].src.is_ssa);
+ assert(alu->src[2].src.is_ssa);
+ assert(alu->src[1].src.ssa->bit_size ==
+ alu->src[2].src.ssa->bit_size);
+ if (alu->src[1].src.ssa->bit_size != 64)
+ return false;
+ break;
+ case nir_op_ieq:
+ case nir_op_ine:
+ case nir_op_ult:
+ case nir_op_ilt:
+ case nir_op_uge:
+ case nir_op_ige:
+ assert(alu->src[0].src.is_ssa);
+ assert(alu->src[1].src.is_ssa);
+ assert(alu->src[0].src.ssa->bit_size ==
+ alu->src[1].src.ssa->bit_size);
+ if (alu->src[0].src.ssa->bit_size != 64)
+ return false;
+ break;
+ case nir_op_ufind_msb:
+ case nir_op_bit_count:
+ assert(alu->src[0].src.is_ssa);
+ if (alu->src[0].src.ssa->bit_size != 64)
+ return false;
+ break;
+ case nir_op_amul:
+ assert(alu->dest.dest.is_ssa);
+ if (options->has_imul24)
+ return false;
+ if (alu->dest.dest.ssa.bit_size != 64)
+ return false;
+ break;
+ case nir_op_i2f64:
+ case nir_op_u2f64:
+ case nir_op_i2f32:
+ case nir_op_u2f32:
+ case nir_op_i2f16:
+ case nir_op_u2f16:
+ assert(alu->src[0].src.is_ssa);
+ if (alu->src[0].src.ssa->bit_size != 64)
+ return false;
+ break;
+ case nir_op_f2u64:
+ case nir_op_f2i64:
+ /* fall-through */
+ default:
+ assert(alu->dest.dest.is_ssa);
+ if (alu->dest.dest.ssa.bit_size != 64)
+ return false;
+ break;
+ }
+
+ unsigned mask = nir_lower_int64_op_to_options_mask(alu->op);
+ return (options->lower_int64_options & mask) != 0;
+}
+
+bool
+nir_lower_int64(nir_shader *shader)
+{
+ return nir_shader_lower_instructions(shader,
+ should_lower_int64_alu_instr,
+ lower_int64_alu_instr,
+ (void *)shader->options);
}
projects / mesa.git / blobdiff