gnu /
gcc /
d4cc7a8c4a623b62dd0d486d7780d91b58eb6f1f i386: correct x87&SSE multiplication modeling in znver.md
All multiplication instructions are fully pipelined, except AVX256
instructions on Zen 1, which issue over two cycles on a 128-bit unit.
Correct the model accordingly to reduce combinatorial explosion in
automaton tables.
Top znver table sizes in insn-automata.o:
Before:
30056 r znver1_fp_min_issue_delay
120224 r znver1_fp_transitions
After:
6720 r znver1_fp_min_issue_delay
53760 r znver1_fp_transitions
gcc/ChangeLog:
PR target/87832
* config/i386/znver.md: (znver1_fp_op_mul): Correct cycles in
the reservation.
(znver1_fp_op_mul_load): Ditto.
(znver1_mmx_mul): Ditto.
(znver1_mmx_load): Ditto.
(znver1_ssemul_ss_ps): Ditto.
(znver1_ssemul_ss_ps_load): Ditto.
(znver1_ssemul_avx256_ps): Ditto.
(znver1_ssemul_avx256_ps_load): Ditto.
(znver1_ssemul_sd_pd): Ditto.
(znver1_ssemul_sd_pd_load): Ditto.
(znver2_ssemul_sd_pd): Ditto.
(znver2_ssemul_sd_pd_load): Ditto.
(znver1_ssemul_avx256_pd): Ditto.
(znver1_ssemul_avx256_pd_load): Ditto.
(znver1_sseimul): Ditto.
(znver1_sseimul_avx256): Ditto.
(znver1_sseimul_load): Ditto.
(znver1_sseimul_avx256_load): Ditto.
(znver1_sseimul_di): Ditto.
(znver1_sseimul_load_di): Ditto.
1 file changed
