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From: Kito Cheng <kito@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-2329] RISC-V: Add csrr vlenb instruction. Date: Thu, 1 Sep 2022 02:04:18 +0000 (GMT) [thread overview] Message-ID: <20220901020418.D4E96383601C@sourceware.org> (raw) https://gcc.gnu.org/g:8fe75147a948ceab6fb9afbe0ee698517ce1dda0 commit r13-2329-g8fe75147a948ceab6fb9afbe0ee698517ce1dda0 Author: zhongjuzhe <juzhe.zhong@rivai.ai> Date: Tue Aug 30 14:20:27 2022 +0800 RISC-V: Add csrr vlenb instruction. gcc/ChangeLog: * config/riscv/riscv.cc (riscv_const_insns): Add cost of poly_int. (riscv_output_move): Add csrr vlenb assembly. * config/riscv/riscv.md (move_type): Add csrr vlenb type. (ext): New attribute. (ext_enabled): Ditto. (enabled): Ditto. Diff: --- gcc/config/riscv/riscv.cc | 12 +++++++ gcc/config/riscv/riscv.md | 79 ++++++++++++++++++++++++++++++++++------------- 2 files changed, 69 insertions(+), 22 deletions(-) diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc index 5e68fccbb9e..30cbf00542e 100644 --- a/gcc/config/riscv/riscv.cc +++ b/gcc/config/riscv/riscv.cc @@ -1136,6 +1136,12 @@ riscv_const_insns (rtx x) case LABEL_REF: return riscv_symbol_insns (riscv_classify_symbol (x)); + /* TODO: In RVV, we get CONST_POLY_INT by using csrr VLENB + instruction and several scalar shift or mult instructions, + it is so far unknown. We set it to 4 temporarily. */ + case CONST_POLY_INT: + return 4; + default: return 0; } @@ -2507,6 +2513,12 @@ riscv_output_move (rtx dest, rtx src) return "fld\t%0,%1"; } } + if (dest_code == REG && GP_REG_P (REGNO (dest)) && src_code == CONST_POLY_INT) + { + /* We only want a single full vector register VLEN read after reload. */ + gcc_assert (known_eq (rtx_to_poly_int64 (src), BYTES_PER_RISCV_VECTOR)); + return "csrr\t%0,vlenb"; + } gcc_unreachable (); } diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md index 63bb3c8debc..2bfab198370 100644 --- a/gcc/config/riscv/riscv.md +++ b/gcc/config/riscv/riscv.md @@ -148,7 +148,7 @@ ;; scheduling type to be "multi" instead. (define_attr "move_type" "unknown,load,fpload,store,fpstore,mtc,mfc,move,fmove, - const,logical,arith,andi,shift_shift" + const,logical,arith,andi,shift_shift,rdvlenb" (const_string "unknown")) ;; Main data type used by the insn @@ -166,6 +166,35 @@ (const_string "yes")] (const_string "no"))) +;; ISA attributes. +(define_attr "ext" "base,f,d,vector" + (const_string "base")) + +;; True if the extension is enabled. +(define_attr "ext_enabled" "no,yes" + (cond [(eq_attr "ext" "base") + (const_string "yes") + + (and (eq_attr "ext" "f") + (match_test "TARGET_HARD_FLOAT")) + (const_string "yes") + + (and (eq_attr "ext" "d") + (match_test "TARGET_DOUBLE_FLOAT")) + (const_string "yes") + + (and (eq_attr "ext" "vector") + (match_test "TARGET_VECTOR")) + (const_string "yes") + ] + (const_string "no"))) + +;; Attribute to control enable or disable instructions. +(define_attr "enabled" "no,yes" + (cond [(eq_attr "ext_enabled" "no") + (const_string "no")] + (const_string "yes"))) + ;; Classification of each insn. ;; branch conditional branch ;; jump unconditional jump @@ -326,7 +355,8 @@ (eq_attr "dword_mode" "yes")) (const_string "multi") (eq_attr "move_type" "move") (const_string "move") - (eq_attr "move_type" "const") (const_string "const")] + (eq_attr "move_type" "const") (const_string "const") + (eq_attr "move_type" "rdvlenb") (const_string "rdvlenb")] (const_string "unknown"))) ;; Length of instruction in bytes. @@ -1633,24 +1663,26 @@ }) (define_insn "*movdi_32bit" - [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r,m, *f,*f,*r,*f,*m") - (match_operand:DI 1 "move_operand" " r,i,m,r,*J*r,*m,*f,*f,*f"))] + [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r,m, *f,*f,*r,*f,*m,r") + (match_operand:DI 1 "move_operand" " r,i,m,r,*J*r,*m,*f,*f,*f,vp"))] "!TARGET_64BIT && (register_operand (operands[0], DImode) || reg_or_0_operand (operands[1], DImode))" { return riscv_output_move (operands[0], operands[1]); } - [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore") - (set_attr "mode" "DI")]) + [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore,rdvlenb") + (set_attr "mode" "DI") + (set_attr "ext" "base,base,base,base,d,d,d,d,d,vector")]) (define_insn "*movdi_64bit" - [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*f,*m") - (match_operand:DI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f,*f"))] + [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*f,*m,r") + (match_operand:DI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f,*f,vp"))] "TARGET_64BIT && (register_operand (operands[0], DImode) || reg_or_0_operand (operands[1], DImode))" { return riscv_output_move (operands[0], operands[1]); } - [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore") - (set_attr "mode" "DI")]) + [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore,rdvlenb") + (set_attr "mode" "DI") + (set_attr "ext" "base,base,base,base,d,d,d,d,d,vector")]) ;; 32-bit Integer moves @@ -1664,13 +1696,14 @@ }) (define_insn "*movsi_internal" - [(set (match_operand:SI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*m") - (match_operand:SI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f"))] + [(set (match_operand:SI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*m,r") + (match_operand:SI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f,vp"))] "(register_operand (operands[0], SImode) || reg_or_0_operand (operands[1], SImode))" { return riscv_output_move (operands[0], operands[1]); } - [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fpstore") - (set_attr "mode" "SI")]) + [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fpstore,rdvlenb") + (set_attr "mode" "SI") + (set_attr "ext" "base,base,base,base,f,f,f,f,vector")]) ;; 16-bit Integer moves @@ -1689,13 +1722,14 @@ }) (define_insn "*movhi_internal" - [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r") - (match_operand:HI 1 "move_operand" " r,T,m,rJ,*r*J,*f"))] + [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r,r") + (match_operand:HI 1 "move_operand" " r,T,m,rJ,*r*J,*f,vp"))] "(register_operand (operands[0], HImode) || reg_or_0_operand (operands[1], HImode))" { return riscv_output_move (operands[0], operands[1]); } - [(set_attr "move_type" "move,const,load,store,mtc,mfc") - (set_attr "mode" "HI")]) + [(set_attr "move_type" "move,const,load,store,mtc,mfc,rdvlenb") + (set_attr "mode" "HI") + (set_attr "ext" "base,base,base,base,f,f,vector")]) ;; HImode constant generation; see riscv_move_integer for details. ;; si+si->hi without truncation is legal because of @@ -1731,13 +1765,14 @@ }) (define_insn "*movqi_internal" - [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r") - (match_operand:QI 1 "move_operand" " r,I,m,rJ,*r*J,*f"))] + [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r,r") + (match_operand:QI 1 "move_operand" " r,I,m,rJ,*r*J,*f,vp"))] "(register_operand (operands[0], QImode) || reg_or_0_operand (operands[1], QImode))" { return riscv_output_move (operands[0], operands[1]); } - [(set_attr "move_type" "move,const,load,store,mtc,mfc") - (set_attr "mode" "QI")]) + [(set_attr "move_type" "move,const,load,store,mtc,mfc,rdvlenb") + (set_attr "mode" "QI") + (set_attr "ext" "base,base,base,base,f,f,vector")]) ;; 32-bit floating point moves
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