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sse.md (reduc_plus_scal_v4df): Avoid the use of haddv4df... 

2018-10-02  Richard Biener  <rguenther@suse.de>

	* config/i386/sse.md (reduc_plus_scal_v4df): Avoid the use
	of haddv4df, first reduce to SSE width and exploit the fact
	that we only need element zero with the reduction result.
	(reduc_plus_scal_v2df): Likewise.

From-SVN: r264785
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Richard Biener 2018-10-02 13:06:54 +00:00 committed by Richard Biener
parent 1c02928295
commit f512bf3ee9
2 changed files with 21 additions and 10 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2018-10-02 Richard Biener <rguenther@suse.de>
* config/i386/sse.md (reduc_plus_scal_v4df): Avoid the use
of haddv4df, first reduce to SSE width and exploit the fact
that we only need element zero with the reduction result.
(reduc_plus_scal_v2df): Likewise.
2018-10-02 Eric Botcazou <ebotcazou@adacore.com>
* dojump.h (do_jump): Delete.

24
gcc/config/i386/sse.md
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@ -2473,24 +2473,28 @@
(match_operand:V4DF 1 "register_operand")]
"TARGET_AVX"
{
rtx tmp = gen_reg_rtx (V4DFmode);
rtx tmp2 = gen_reg_rtx (V4DFmode);
rtx vec_res = gen_reg_rtx (V4DFmode);
emit_insn (gen_avx_haddv4df3 (tmp, operands[1], operands[1]));
emit_insn (gen_avx_vperm2f128v4df3 (tmp2, tmp, tmp, GEN_INT (1)));
emit_insn (gen_addv4df3 (vec_res, tmp, tmp2));
emit_insn (gen_vec_extractv4dfdf (operands[0], vec_res, const0_rtx));
rtx tmp = gen_reg_rtx (V2DFmode);
emit_insn (gen_vec_extract_hi_v4df (tmp, operands[1]));
rtx tmp2 = gen_reg_rtx (V2DFmode);
emit_insn (gen_addv2df3 (tmp2, tmp, gen_lowpart (V2DFmode, operands[1])));
rtx tmp3 = gen_reg_rtx (V2DFmode);
emit_insn (gen_vec_interleave_highv2df (tmp3, tmp2, tmp2));
emit_insn (gen_adddf3 (operands[0],
gen_lowpart (DFmode, tmp2),
gen_lowpart (DFmode, tmp3)));
DONE;
})
(define_expand "reduc_plus_scal_v2df"
[(match_operand:DF 0 "register_operand")
(match_operand:V2DF 1 "register_operand")]
"TARGET_SSE3"
"TARGET_SSE2"
{
rtx tmp = gen_reg_rtx (V2DFmode);
emit_insn (gen_sse3_haddv2df3 (tmp, operands[1], operands[1]));
emit_insn (gen_vec_extractv2dfdf (operands[0], tmp, const0_rtx));
emit_insn (gen_vec_interleave_highv2df (tmp, operands[1], operands[1]));
emit_insn (gen_adddf3 (operands[0],
gen_lowpart (DFmode, tmp),
gen_lowpart (DFmode, operands[1])));
DONE;
})