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re PR target/89071 (AVX vcvtsd2ss lets us avoid PXOR dependency breaking for scalar float<->double and other scalar xmm,xmm instructions)

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PR target/89071
	* config/i386/i386.md (*sqrt<mode>2_sse): Add (v,0) alternative.
	Do not prefer (v,v) alternative for non-AVX targets and (m,v)
	alternative for speed when TARGET_SSE_PARTIAL_REG_DEPENDENCY is set.
	(*rcpsf2_sse): Ditto.
	(*rsqrtsf2_sse): Ditto.
	(sse4_1_round<mode<2): Ditto.

From-SVN: r268496
This commit is contained in:
Uros Bizjak 2019-02-03 17:48:41 +01:00 committed by Uros Bizjak
parent c8eaf058ed
commit d31fd1e8ab
2 changed files with 67 additions and 27 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2019-02-03 Uroš Bizjak <ubizjak@gmail.com>
PR target/89071
* config/i386/i386.md (*sqrt<mode>2_sse): Add (v,0) alternative.
Do not prefer (v,v) alternative for non-AVX targets and (m,v)
alternative for speed when TARGET_SSE_PARTIAL_REG_DEPENDENCY is set.
(*rcpsf2_sse): Ditto.
(*rsqrtsf2_sse): Ditto.
(sse4_1_round<mode<2): Ditto.
2019-02-03 Richard Biener <rguenther@suse.de>
PR debug/87295

84
gcc/config/i386/i386.md
View File

@ -4472,9 +4472,9 @@
(set (match_dup 0) (float_extend:DF (match_dup 2)))]
"operands[2] = lowpart_subreg (SFmode, operands[0], DFmode);")
;; Break partial reg stall for cvtss2sd. This splitter should split
;; late in the pass sequence (after register rename pass),
;; so allocated registers won't change anymore.
;; Break partial SSE register dependency stall. This splitter should split
;; late in the pass sequence (after register rename pass), so allocated
;; registers won't change anymore
(define_split
[(set (match_operand:DF 0 "sse_reg_operand")
@ -4632,9 +4632,9 @@
(set (match_dup 0) (float_truncate:SF (match_dup 2)))]
"operands[2] = lowpart_subreg (DFmode, operands[0], SFmode);")
;; Break partial reg stall for cvtsd2ss. This splitter should split
;; late in the pass sequence (after register rename pass),
;; so allocated registers won't change anymore.
;; Break partial SSE register dependency stall. This splitter should split
;; late in the pass sequence (after register rename pass), so allocated
;; registers won't change anymore
(define_split
[(set (match_operand:SF 0 "sse_reg_operand")
@ -5137,7 +5137,7 @@
(set_attr "unit" "i387")
(set_attr "fp_int_src" "true")])
;; Avoid partial SSE register dependency stalls. This splitter should split
;; Break partial SSE register dependency stall. This splitter should split
;; late in the pass sequence (after register rename pass), so allocated
;; registers won't change anymore
@ -14765,18 +14765,26 @@
(symbol_ref "false"))))])
(define_insn "*rcpsf2_sse"
[(set (match_operand:SF 0 "register_operand" "=x,x")
(unspec:SF [(match_operand:SF 1 "nonimmediate_operand" "x,m")]
[(set (match_operand:SF 0 "register_operand" "=x,x,x")
(unspec:SF [(match_operand:SF 1 "nonimmediate_operand" "0,x,m")]
UNSPEC_RCP))]
"TARGET_SSE && TARGET_SSE_MATH"
"@
%vrcpss\t{%d1, %0|%0, %d1}
%vrcpss\t{%d1, %0|%0, %d1}
%vrcpss\t{%1, %d0|%d0, %1}"
[(set_attr "type" "sse")
(set_attr "atom_sse_attr" "rcp")
(set_attr "btver2_sse_attr" "rcp")
(set_attr "prefix" "maybe_vex")
(set_attr "mode" "SF")])
(set_attr "mode" "SF")
(set (attr "preferred_for_speed")
(cond [(eq_attr "alternative" "1")
(symbol_ref "TARGET_AVX || !TARGET_SSE_PARTIAL_REG_DEPENDENCY")
(eq_attr "alternative" "2")
(symbol_ref "!TARGET_SSE_PARTIAL_REG_DEPENDENCY")
]
(symbol_ref "true")))])
(define_insn "*fop_xf_1_i387"
[(set (match_operand:XF 0 "register_operand" "=f,f")
@ -15003,18 +15011,26 @@
(set_attr "bdver1_decode" "direct")])
(define_insn "*rsqrtsf2_sse"
[(set (match_operand:SF 0 "register_operand" "=x,x")
(unspec:SF [(match_operand:SF 1 "nonimmediate_operand" "x,m")]
[(set (match_operand:SF 0 "register_operand" "=x,x,x")
(unspec:SF [(match_operand:SF 1 "nonimmediate_operand" "0,x,m")]
UNSPEC_RSQRT))]
"TARGET_SSE && TARGET_SSE_MATH"
"@
%vrsqrtss\t{%d1, %0|%0, %d1}
%vrsqrtss\t{%d1, %0|%0, %d1}
%vrsqrtss\t{%1, %d0|%d0, %1}"
[(set_attr "type" "sse")
(set_attr "atom_sse_attr" "rcp")
(set_attr "btver2_sse_attr" "rcp")
(set_attr "prefix" "maybe_vex")
(set_attr "mode" "SF")])
(set_attr "mode" "SF")
(set (attr "preferred_for_speed")
(cond [(eq_attr "alternative" "1")
(symbol_ref "TARGET_AVX || !TARGET_SSE_PARTIAL_REG_DEPENDENCY")
(eq_attr "alternative" "2")
(symbol_ref "!TARGET_SSE_PARTIAL_REG_DEPENDENCY")
]
(symbol_ref "true")))])
(define_expand "rsqrtsf2"
[(set (match_operand:SF 0 "register_operand")
@ -15027,11 +15043,12 @@
})
(define_insn "*sqrt<mode>2_sse"
[(set (match_operand:MODEF 0 "register_operand" "=v,v")
[(set (match_operand:MODEF 0 "register_operand" "=v,v,v")
(sqrt:MODEF
(match_operand:MODEF 1 "nonimmediate_operand" "v,m")))]
(match_operand:MODEF 1 "nonimmediate_operand" "0,v,m")))]
"SSE_FLOAT_MODE_P (<MODE>mode) && TARGET_SSE_MATH"
"@
%vsqrt<ssemodesuffix>\t{%d1, %0|%0, %d1}
%vsqrt<ssemodesuffix>\t{%d1, %0|%0, %d1}
%vsqrt<ssemodesuffix>\t{%1, %d0|%d0, %1}"
[(set_attr "type" "sse")
@ -15039,9 +15056,13 @@
(set_attr "btver2_sse_attr" "sqrt")
(set_attr "prefix" "maybe_vex")
(set_attr "mode" "<MODE>")
(set_attr "athlon_decode" "*")
(set_attr "amdfam10_decode" "*")
(set_attr "bdver1_decode" "*")])
(set (attr "preferred_for_speed")
(cond [(eq_attr "alternative" "1")
(symbol_ref "TARGET_AVX || !TARGET_SSE_PARTIAL_REG_DEPENDENCY")
(eq_attr "alternative" "2")
(symbol_ref "!TARGET_SSE_PARTIAL_REG_DEPENDENCY")
]
(symbol_ref "true")))])
(define_expand "sqrt<mode>2"
[(set (match_operand:MODEF 0 "register_operand")
@ -16175,21 +16196,30 @@
(define_insn "sse4_1_round<mode>2"
[(set (match_operand:MODEF 0 "register_operand" "=x,x,v")
(unspec:MODEF [(match_operand:MODEF 1 "nonimmediate_operand" "x,m,vm")
(match_operand:SI 2 "const_0_to_15_operand" "n,n,n")]
UNSPEC_ROUND))]
[(set (match_operand:MODEF 0 "register_operand" "=x,x,x,v")
(unspec:MODEF
[(match_operand:MODEF 1 "nonimmediate_operand" "0,x,m,vm")
(match_operand:SI 2 "const_0_to_15_operand" "n,n,n,n")]
UNSPEC_ROUND))]
"TARGET_SSE4_1"
"@
%vround<ssemodesuffix>\t{%2, %d1, %0|%0, %d1, %2}
%vround<ssemodesuffix>\t{%2, %d1, %0|%0, %d1, %2}
%vround<ssemodesuffix>\t{%2, %1, %d0|%d0, %1, %2}
vrndscale<ssemodesuffix>\t{%2, %1, %d0|%d0, %1, %2}"
[(set_attr "type" "ssecvt")
(set_attr "prefix_extra" "1,1,*")
(set_attr "length_immediate" "*,*,1")
(set_attr "prefix" "maybe_vex,maybe_vex,evex")
(set_attr "isa" "noavx512f,noavx512f,avx512f")
(set_attr "mode" "<MODE>")])
(set_attr "prefix_extra" "1,1,1,*")
(set_attr "length_immediate" "*,*,*,1")
(set_attr "prefix" "maybe_vex,maybe_vex,maybe_vex,evex")
(set_attr "isa" "noavx512f,noavx512f,noavx512f,avx512f")
(set_attr "mode" "<MODE>")
(set (attr "preferred_for_speed")
(cond [(eq_attr "alternative" "1")
(symbol_ref "TARGET_AVX || !TARGET_SSE_PARTIAL_REG_DEPENDENCY")
(eq_attr "alternative" "2")
(symbol_ref "!TARGET_SSE_PARTIAL_REG_DEPENDENCY")
]
(symbol_ref "true")))])
(define_insn "rintxf2"
[(set (match_operand:XF 0 "register_operand" "=f")