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intel/mi_builder: Short-circuit shifts in more cases

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Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9116>
This commit is contained in:
Jason Ekstrand 2021-02-18 09:34:34 -06:00 • committed by Marge Bot
parent c64d7aa8e3
commit dbcbb321ad
1 changed files with 10 additions and 1 deletions
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11
src/intel/common/gen_mi_builder.h
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@ -855,6 +855,12 @@ static inline struct gen_mi_value
gen_mi_ishl_imm(struct gen_mi_builder *b,
struct gen_mi_value src, uint32_t shift)
{
if (shift == 0)
return src;
if (shift >= 64)
return gen_mi_imm(0);
struct gen_mi_value res = gen_mi_value_to_gpr(b, src);
for (unsigned i = 0; i < shift; i++)
@ -867,10 +873,13 @@ static inline struct gen_mi_value
gen_mi_ushr32_imm(struct gen_mi_builder *b,
struct gen_mi_value src, uint32_t shift)
{
if (shift == 0)
return src;
/* We right-shift by left-shifting by 32 - shift and taking the top 32 bits
* of the result.
*/
if (shift > 64)
if (shift >= 64)
return gen_mi_imm(0);
if (shift > 32) {