https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66369
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-06-03
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Ever confirmed|0 |1
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 35693
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35693&action=edit
Patch to add zero-extended MOVMSK patterns
This patch adds zero-extended MOVMSK patterns.
However, one more cast from (int) to (unsigned int) is needed in the source,
due to the definition of the intrinsic:
long v;
regchx256 = _mm256_set1_epi8( ch );
regset256 = _mm256_loadu_si256( (__m256i const *) set );
v = (unsigned int) _mm256_movemask_epi8
( _mm256_cmpeq_epi8(regchx256,regset256) );
Using patched gcc, the code compiles to:
lookup32:
vmovdqu charset32(%rip), %ymm0 # 10 *avx_loaddquv32qi
vmovd %edi, %xmm1 # 54 vec_setv4si_0/4
movl $11141307, %eax # 5 *movdi_internal/3
vpbroadcastb %xmm1, %ymm1 # 55 avx2_pbroadcastv32qi
vpcmpeqb %ymm0, %ymm1, %ymm0 # 13 *avx2_eqv32qi3
vpmovmskb %ymm0, %edx # 16 *avx2_pmovmskb_zext
testl %edx, %edx # 19 *cmpsi_ccno_1/1
je .L5 # 20 *jcc_1
tzcntq %rdx, %rdx # 53 *ctzdi2_falsedep
movq mytable+32(,%rdx,8), %rax # 28 *movdi_internal/4
.L5:
vzeroupper # 51 avx_vzeroupper
ret # 58 simple_return_internal
