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mesa/bptc: Use util_sign_extend 

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17214>
This commit is contained in:
Jason Ekstrand 2022-06-23 12:52:27 -05:00 committed by Marge Bot
parent 1df29825e7
commit a307bc8556
1 changed files with 4 additions and 14 deletions
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18
src/mesa/main/texcompress_bptc_tmp.h
View File

@ -818,16 +818,6 @@ decompress_rgba_unorm(int width, int height,
}
#endif // BPTC_BLOCK_DECODE
static int32_t
sign_extend(int32_t value,
int n_bits)
{
assert(n_bits > 0 && n_bits < 32);
const unsigned n = 32 - n_bits;
return (int32_t)((uint32_t)value << n) >> n;
}
static int
signed_unquantize(int value, int n_endpoint_bits)
{
@ -912,8 +902,8 @@ extract_float_endpoints(const struct bptc_float_mode *mode,
/* The endpoints are specified as signed offsets from e0 */
for (endpoint = 1; endpoint < n_endpoints; endpoint++) {
for (component = 0; component < 3; component++) {
value = sign_extend(endpoints[endpoint][component],
mode->n_delta_bits[component]);
value = util_sign_extend(endpoints[endpoint][component],
mode->n_delta_bits[component]);
endpoints[endpoint][component] =
((endpoints[0][component] + value) &
((1 << mode->n_endpoint_bits) - 1));
@ -924,8 +914,8 @@ extract_float_endpoints(const struct bptc_float_mode *mode,
if (is_signed) {
for (endpoint = 0; endpoint < n_endpoints; endpoint++) {
for (component = 0; component < 3; component++) {
value = sign_extend(endpoints[endpoint][component],
mode->n_endpoint_bits);
value = util_sign_extend(endpoints[endpoint][component],
mode->n_endpoint_bits);
endpoints[endpoint][component] =
signed_unquantize(value, mode->n_endpoint_bits);
}