i386: Emulate MMX vec_dupv2si with SSE

Emulate MMX vec_dupv2si with SSE.  Add the "Yw" constraint to allow
broadcast from integer register for AVX512BW with TARGET_AVX512VL.
Only SSE register source operand is allowed.

	PR target/89021
	* config/i386/constraints.md (Yw): New constraint.
	* config/i386/mmx.md (*vec_dupv2si): Changed to
	define_insn_and_split and also allow TARGET_MMX_WITH_SSE to
	support SSE emulation.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@271225 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 856ff3cab86b0905b9654edcd7a371714e447d23..4d2080fef9929f4ac22dcfd6f930cd01f2961bfb 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2019-05-15  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR target/89021
+       * config/i386/constraints.md (Yw): New constraint.
+       * config/i386/mmx.md (*vec_dupv2si): Changed to
+       define_insn_and_split and also allow TARGET_MMX_WITH_SSE to
+       support SSE emulation.
+
 2019-05-15  H.J. Lu  <hongjiu.lu@intel.com>
 
        PR target/89021

diff --git a/gcc/config/i386/constraints.md b/gcc/config/i386/constraints.md
index 16075b4acf36bd58ee5a52e9086b181ee59eabec..c546b20d9dcde1ec099db30e7a2b5ff99a3e2196 100644 (file)
--- a/gcc/config/i386/constraints.md
+++ b/gcc/config/i386/constraints.md
@@ -110,6 +110,8 @@
 ;;  v  any EVEX encodable SSE register for AVX512VL target,
 ;;     otherwise any SSE register
 ;;  h  EVEX encodable SSE register with number factor of four
+;;  w  any EVEX encodable SSE register for AVX512BW with TARGET_AVX512VL
+;;     target.
 
 (define_register_constraint "Yz" "TARGET_SSE ? SSE_FIRST_REG : NO_REGS"
  "First SSE register (@code{%xmm0}).")
@@ -146,6 +148,10 @@
  "TARGET_AVX512VL ? ALL_SSE_REGS : TARGET_SSE ? SSE_REGS : NO_REGS"
  "@internal For AVX512VL, any EVEX encodable SSE register (@code{%xmm0-%xmm31}), otherwise any SSE register.")
 
+(define_register_constraint "Yw"
+ "TARGET_AVX512BW && TARGET_AVX512VL ? ALL_SSE_REGS : NO_REGS"
+ "@internal Any EVEX encodable SSE register (@code{%xmm0-%xmm31}) for AVX512BW with TARGET_AVX512VL target.")
+
 ;; We use the B prefix to denote any number of internal operands:
 ;;  f  FLAGS_REG
 ;;  g  GOT memory operand.

diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index c1f0b0cfe3f109d79a4613f42082f3bdbfaa26e1..80859d59140b4befe6490fdf52b9626831ea5dae 100644 (file)
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -1406,14 +1406,24 @@
    (set_attr "length_immediate" "1")
    (set_attr "mode" "DI")])
 
-(define_insn "*vec_dupv2si"
-  [(set (match_operand:V2SI 0 "register_operand" "=y")
+(define_insn_and_split "*vec_dupv2si"
+  [(set (match_operand:V2SI 0 "register_operand" "=y,x,Yv,Yw")
        (vec_duplicate:V2SI
-         (match_operand:SI 1 "register_operand" "0")))]
-  "TARGET_MMX"
-  "punpckldq\t%0, %0"
-  [(set_attr "type" "mmxcvt")
-   (set_attr "mode" "DI")])
+         (match_operand:SI 1 "register_operand" "0,0,Yv,r")))]
+  "TARGET_MMX || TARGET_MMX_WITH_SSE"
+  "@
+   punpckldq\t%0, %0
+   #
+   #
+   #"
+  "TARGET_MMX_WITH_SSE && reload_completed"
+  [(set (match_dup 0)
+       (vec_duplicate:V4SI (match_dup 1)))]
+  "operands[0] = lowpart_subreg (V4SImode, operands[0],
+                                GET_MODE (operands[0]));"
+  [(set_attr "mmx_isa" "native,x64_noavx,x64_avx,x64_avx")
+   (set_attr "type" "mmxcvt,ssemov,ssemov,ssemov")
+   (set_attr "mode" "DI,TI,TI,TI")])
 
 (define_insn "*mmx_concatv2si"
   [(set (match_operand:V2SI 0 "register_operand"     "=y,y")