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authorJason Ekstrand <[email protected]>2017-02-23 21:40:55 -0800
committerMatt Turner <[email protected]>2019-01-09 16:42:40 -0800
commitadab27e741d27e0ba13102b27b6916011e6a9c07 (patch)
treeda86399b590d87352c802a45062f029697c1cb73
parentdde73e646fe22e50878783580d1707a2acceb054 (diff)
nir: Add some more int64 lowering helpers
[mattst88]: Found in an old branch of Jason's. Jason implemented: inot, iand, ior, iadd, isub, ineg, iabs, compare, imin, imax, umin, umax Matt implemented: ixor, bcsel, b2i, i2b, i2i8, i2i16, i2i32, i2i64, u2u8, u2u16, u2u32, u2u64, and fixed ilt Reviewed-by: Elie Tournier <[email protected]>
-rw-r--r--src/compiler/nir/nir_lower_int64.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_lower_int64.c b/src/compiler/nir/nir_lower_int64.c
index 2a9ea3e1bdd..575aa839581 100644
--- a/src/compiler/nir/nir_lower_int64.c
+++ b/src/compiler/nir/nir_lower_int64.c
@@ -25,6 +25,233 @@
#include "nir_builder.h"
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(b, x32, nir_imm_int(b, 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_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_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);
+
+ 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_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);