Sven Tennie pushed to branch wip/supersven/fix_MO_S_Shr at Glasgow Haskell Compiler / GHC Commits: 500024be by Sven Tennie at 2025-07-31T20:05:44+02:00 WIP: Cleanup shift emitting cases/code - - - - - 1 changed file: - compiler/GHC/CmmToAsm/RV64/CodeGen.hs Changes: ===================================== compiler/GHC/CmmToAsm/RV64/CodeGen.hs ===================================== @@ -874,47 +874,18 @@ getRegister' config plat expr = ) -- 2. Shifts. x << n, x >> n. - CmmMachOp (MO_Shl w) [x, CmmLit (CmmInt n _)] - | w == W32, - 0 <= n, - n < 32 -> do - (reg_x, _format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `snocOL` annExpr expr (SLL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - `appOL` truncateReg w w dst - ) - CmmMachOp (MO_Shl w) [x, CmmLit (CmmInt n _)] - | w == W64, - 0 <= n, - n < 64 -> do - (reg_x, _format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `snocOL` annExpr expr (SLL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - `appOL` truncateReg w w dst - ) - CmmMachOp (MO_S_Shr w) [x, CmmLit (CmmInt n _)] | fitsIn12bitImm n -> do - (reg_x, format_x, code_x) <- getSomeReg x - (reg_x', code_x') <- signExtendReg (formatToWidth format_x) w reg_x + CmmMachOp (MO_Shl w) [x, CmmLit (CmmInt n _)] | fitsIn12bitImm n -> do + (reg_x, _format_x, code_x) <- getSomeReg x return $ Any (intFormat w) ( \dst -> code_x - `appOL` code_x' - `snocOL` annExpr expr (SRA (OpReg w dst) (OpReg w reg_x') (OpImm (ImmInteger n))) + `snocOL` annExpr expr (SLL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) `appOL` truncateReg w w dst ) - CmmMachOp (MO_S_Shr w) [x, y] -> do + CmmMachOp (MO_S_Shr w) [x, CmmLit (CmmInt n _)] | fitsIn12bitImm n -> do (reg_x, format_x, code_x) <- getSomeReg x - (reg_y, _format_y, code_y) <- getSomeReg y (reg_x', code_x') <- signExtendReg (formatToWidth format_x) w reg_x return $ Any @@ -922,73 +893,20 @@ getRegister' config plat expr = ( \dst -> code_x `appOL` code_x' - `appOL` code_y - `snocOL` annExpr expr (SRA (OpReg w dst) (OpReg w reg_x') (OpReg w reg_y)) + `snocOL` annExpr expr (SRA (OpReg w dst) (OpReg w reg_x') (OpImm (ImmInteger n))) `appOL` truncateReg w w dst ) - CmmMachOp (MO_U_Shr w) [x, CmmLit (CmmInt n _)] - | w == W8, - 0 <= n, - n < 8 -> do - (reg_x, format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `appOL` truncateReg (formatToWidth format_x) w reg_x - `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - ) - CmmMachOp (MO_U_Shr w) [x, CmmLit (CmmInt n _)] - | w == W16, - 0 <= n, - n < 16 -> do - (reg_x, format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `appOL` truncateReg (formatToWidth format_x) w reg_x - `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - ) - CmmMachOp (MO_U_Shr w) [x, y] | w == W8 || w == W16 -> do + CmmMachOp (MO_U_Shr w) [x, CmmLit (CmmInt n _)] | fitsIn12bitImm n -> do (reg_x, format_x, code_x) <- getSomeReg x - (reg_y, _format_y, code_y) <- getSomeReg y return $ Any (intFormat w) ( \dst -> code_x - `appOL` code_y `appOL` truncateReg (formatToWidth format_x) w reg_x - `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpReg w reg_y)) + `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) + `appOL` truncateReg w w dst ) - CmmMachOp (MO_U_Shr w) [x, CmmLit (CmmInt n _)] - | w == W32, - 0 <= n, - n < 32 -> do - (reg_x, _format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - ) - CmmMachOp (MO_U_Shr w) [x, CmmLit (CmmInt n _)] - | w == W64, - 0 <= n, - n < 64 -> do - (reg_x, _format_x, code_x) <- getSomeReg x - return - $ Any - (intFormat w) - ( \dst -> - code_x - `snocOL` annExpr expr (SRL (OpReg w dst) (OpReg w reg_x) (OpImm (ImmInteger n))) - ) - -- 3. Logic &&, || CmmMachOp (MO_And w) [CmmReg reg, CmmLit (CmmInt n _)] | fitsIn12bitImm n -> View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/500024be3f9e0f543c46af4b28a80137... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/500024be3f9e0f543c46af4b28a80137... You're receiving this email because of your account on gitlab.haskell.org.