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nir: add opcodes for 16-bit packing and unpacking

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Noitice that we don't need 'split' versions of the 64-bit to / from
16-bit opcodes which we require during pack lowering to implement these
operations. This is because these operations can be expressed as a
collection of 32-bit from / to 16-bit and 64-bit to / from 32-bit
operations, so we don't need new opcodes specifically for them.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Iago Toral Quiroga
2018-04-17 10:07:40 +02:00
parent 6318808a05
commit c9653cc14c
1 changed files with 19 additions and 0 deletions
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19
src/compiler/nir/nir_opcodes.py
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@@ -91,6 +91,7 @@ tfloat = "float"
tint = "int" tint = "int"
tbool = "bool32" tbool = "bool32"
tuint = "uint" tuint = "uint"
tuint16 = "uint16"
tfloat32 = "float32" tfloat32 = "float32"
tint32 = "int32" tint32 = "int32"
tuint32 = "uint32" tuint32 = "uint32"
@@ -282,12 +283,24 @@ dst.x = (src0.x << 0) |
(src0.w << 24); (src0.w << 24);
""") """)
unop_horiz("pack_32_2x16", 1, tuint32, 2, tuint16,
"dst.x = src0.x | ((uint32_t)src0.y << 16);")
unop_horiz("pack_64_2x32", 1, tuint64, 2, tuint32, unop_horiz("pack_64_2x32", 1, tuint64, 2, tuint32,
"dst.x = src0.x | ((uint64_t)src0.y << 32);") "dst.x = src0.x | ((uint64_t)src0.y << 32);")
unop_horiz("pack_64_4x16", 1, tuint64, 4, tuint16,
"dst.x = src0.x | ((uint64_t)src0.y << 16) | ((uint64_t)src0.z << 32) | ((uint64_t)src0.w << 48);")
unop_horiz("unpack_64_2x32", 2, tuint32, 1, tuint64, unop_horiz("unpack_64_2x32", 2, tuint32, 1, tuint64,
"dst.x = src0.x; dst.y = src0.x >> 32;") "dst.x = src0.x; dst.y = src0.x >> 32;")
unop_horiz("unpack_64_4x16", 4, tuint16, 1, tuint64,
"dst.x = src0.x; dst.y = src0.x >> 16; dst.z = src0.x >> 32; dst.w = src0.w >> 48;")
unop_horiz("unpack_32_2x16", 2, tuint16, 1, tuint32,
"dst.x = src0.x; dst.y = src0.x >> 16;")
# Lowered floating point unpacking operations. # Lowered floating point unpacking operations.
@@ -296,6 +309,9 @@ unop_horiz("unpack_half_2x16_split_x", 1, tfloat32, 1, tuint32,
unop_horiz("unpack_half_2x16_split_y", 1, tfloat32, 1, tuint32, unop_horiz("unpack_half_2x16_split_y", 1, tfloat32, 1, tuint32,
"unpack_half_1x16((uint16_t)(src0.x >> 16))") "unpack_half_1x16((uint16_t)(src0.x >> 16))")
unop_convert("unpack_32_2x16_split_x", tuint16, tuint32, "src0")
unop_convert("unpack_32_2x16_split_y", tuint16, tuint32, "src0 >> 16")
unop_convert("unpack_64_2x32_split_x", tuint32, tuint64, "src0") unop_convert("unpack_64_2x32_split_x", tuint32, tuint64, "src0")
unop_convert("unpack_64_2x32_split_y", tuint32, tuint64, "src0 >> 32") unop_convert("unpack_64_2x32_split_y", tuint32, tuint64, "src0 >> 32")
@@ -608,6 +624,9 @@ binop_horiz("pack_half_2x16_split", 1, tuint32, 1, tfloat32, 1, tfloat32,
binop_convert("pack_64_2x32_split", tuint64, tuint32, "", binop_convert("pack_64_2x32_split", tuint64, tuint32, "",
"src0 | ((uint64_t)src1 << 32)") "src0 | ((uint64_t)src1 << 32)")
binop_convert("pack_32_2x16_split", tuint32, tuint16, "",
"src0 | ((uint32_t)src1 << 16)")
# bfm implements the behavior of the first operation of the SM5 "bfi" assembly # bfm implements the behavior of the first operation of the SM5 "bfi" assembly
# and that of the "bfi1" i965 instruction. That is, it has undefined behavior # and that of the "bfi1" i965 instruction. That is, it has undefined behavior
# if either of its arguments are 32. # if either of its arguments are 32.