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panfrost: Add padded type for instance fields

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Mali has a special 5:3 encoding representing a subset of the natural
numbers, of the form:

   a * (2^b)

for a odd and b natural/zero. It is used for padding out instance sizes,
as well as in attribute records so it's worth representing as a native
type as opposed to having manual packs/unpacks in various places.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6476>
This commit is contained in:
Alyssa Rosenzweig 2020-08-24 13:36:22 -04:00 • committed by Marge Bot
parent 45c59db732
commit e213a864e5
1 changed files with 33 additions and 1 deletions
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34
src/panfrost/lib/gen_pack.py
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@ -81,6 +81,23 @@ __gen_sint(int32_t v, uint32_t start, uint32_t end)
return ((uint32_t) v) << start;
}
static inline uint32_t
__gen_padded(uint32_t v, uint32_t start, uint32_t end)
{
unsigned shift = __builtin_ctz(v);
unsigned odd = v >> (shift + 1);
#ifndef NDEBUG
assert((v >> shift) & 1);
assert(shift <= 31);
assert(odd <= 7);
assert((end - start + 1) == 8);
#endif
return __gen_uint(shift | (odd << 5), start, end);
}
static inline uint64_t
__gen_unpack_uint(const uint8_t *restrict cl, uint32_t start, uint32_t end)
{
@ -105,6 +122,16 @@ __gen_unpack_sint(const uint8_t *restrict cl, uint32_t start, uint32_t end)
return (val << (64 - size)) >> (64 - size);
}
static inline uint64_t
__gen_unpack_padded(const uint8_t *restrict cl, uint32_t start, uint32_t end)
{
unsigned val = __gen_unpack_uint(cl, start, end);
unsigned shift = val & 0b11111;
unsigned odd = val >> 5;
return (2*odd + 1) << shift;
}
#define pan_pack(dst, T, name) \
for (struct MALI_ ## T name = { MALI_ ## T ## _header }, \
*_loop_terminate = (void *) (dst); \
@ -224,7 +251,7 @@ class Field(object):
type = 'uint64_t'
elif self.type == 'int':
type = 'int32_t'
elif self.type == 'uint':
elif self.type in ['uint', 'padded']:
type = 'uint32_t'
elif self.type in self.parser.structs:
type = 'struct ' + self.parser.gen_prefix(safe_name(self.type.upper()))
@ -358,6 +385,9 @@ class Group(object):
if field.type == "uint" or field.type == "address":
s = "__gen_uint(%s, %d, %d)" % \
(value, start, end)
elif field.type == "padded":
s = "__gen_padded(%s, %d, %d)" % \
(value, start, end)
elif field.type in self.parser.enums:
s = "__gen_uint(%s, %d, %d)" % \
(value, start, end)
@ -437,6 +467,8 @@ class Group(object):
convert = "__gen_unpack_uint"
elif field.type == "int":
convert = "__gen_unpack_sint"
elif field.type == "padded":
convert = "__gen_unpack_padded"
elif field.type == "bool":
convert = "__gen_unpack_uint"
elif field.type == "float":