Mesa (main): util,nir: Move mask_sign_extend from opt_load_store_vectorize to util
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gitlab-mirror at kemper.freedesktop.org
Wed Jul 6 12:09:28 UTC 2022
Module: Mesa
Branch: main
Commit: efc63ea02df61c12b5e7719ecd3ab0cb510b4141
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=efc63ea02df61c12b5e7719ecd3ab0cb510b4141
Author: Jason Ekstrand <jason.ekstrand at collabora.com>
Date: Thu Jun 23 12:55:40 2022 -0500
util,nir: Move mask_sign_extend from opt_load_store_vectorize to util
While we're moving it, reformat a bit to make it match util_sign_extend
better.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg at gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17214>
---
src/compiler/nir/nir_opt_load_store_vectorize.c | 12 +++---------
src/util/u_math.h | 19 ++++++++++++++++---
2 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/src/compiler/nir/nir_opt_load_store_vectorize.c b/src/compiler/nir/nir_opt_load_store_vectorize.c
index 4b6dc71b224..067b2dea78c 100644
--- a/src/compiler/nir/nir_opt_load_store_vectorize.c
+++ b/src/compiler/nir/nir_opt_load_store_vectorize.c
@@ -360,17 +360,11 @@ type_scalar_size_bytes(const struct glsl_type *type)
return glsl_type_is_boolean(type) ? 4u : glsl_get_bit_size(type) / 8u;
}
-static uint64_t
-mask_sign_extend(uint64_t val, unsigned bit_size)
-{
- return (int64_t)(val << (64 - bit_size)) >> (64 - bit_size);
-}
-
static unsigned
add_to_entry_key(nir_ssa_scalar *offset_defs, uint64_t *offset_defs_mul,
unsigned offset_def_count, nir_ssa_scalar def, uint64_t mul)
{
- mul = mask_sign_extend(mul, def.def->bit_size);
+ mul = util_mask_sign_extend(mul, def.def->bit_size);
for (unsigned i = 0; i <= offset_def_count; i++) {
if (i == offset_def_count || def.def->index > offset_defs[i].def->index) {
@@ -437,7 +431,7 @@ create_entry_key_from_deref(void *mem_ctx,
nir_ssa_scalar base = {.def=index, .comp=0};
uint64_t offset = 0, base_mul = 1;
parse_offset(&base, &base_mul, &offset);
- offset = mask_sign_extend(offset, index->bit_size);
+ offset = util_mask_sign_extend(offset, index->bit_size);
*offset_base += offset * stride;
if (base.def) {
@@ -609,7 +603,7 @@ create_entry(struct vectorize_ctx *ctx,
entry->offset = offset;
if (base)
- entry->offset = mask_sign_extend(entry->offset, base->bit_size);
+ entry->offset = util_mask_sign_extend(entry->offset, base->bit_size);
}
if (entry->info->resource_src >= 0)
diff --git a/src/util/u_math.h b/src/util/u_math.h
index cf2e079cdcd..21037cb3a46 100644
--- a/src/util/u_math.h
+++ b/src/util/u_math.h
@@ -579,6 +579,21 @@ util_bswap16(uint16_t n)
(n << 8);
}
+/**
+ * Mask and sign-extend a number
+ *
+ * The bit at position `width - 1` is replicated to all the higher bits.
+ * This makes no assumptions about the high bits of the value and will
+ * overwrite them with the sign bit.
+ */
+static inline int64_t
+util_mask_sign_extend(uint64_t val, unsigned width)
+{
+ assert(width > 0 && width <= 64);
+ unsigned shift = 64 - width;
+ return (int64_t)(val << shift) >> shift;
+}
+
/**
* Sign-extend a number
*
@@ -588,10 +603,8 @@ util_bswap16(uint16_t n)
static inline int64_t
util_sign_extend(uint64_t val, unsigned width)
{
- assert(width > 0 && width <= 64);
assert(width == 64 || val < (UINT64_C(1) << width));
- unsigned shift = 64 - width;
- return (int64_t)(val << shift) >> shift;
+ return util_mask_sign_extend(val, width);
}
static inline void*
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