From 2fd157813c4964033e156ccb7df8889cd2afee99 Mon Sep 17 00:00:00 2001 From: John David Anglin Date: Sun, 13 Sep 2020 18:47:59 +0000 Subject: [PATCH] Improve costs for DImode shifts of interger constants. 2020-09-13 Roger Sayle gcc/ChangeLog * config/pa/pa.c (hppa_rtx_costs) [ASHIFT, ASHIFTRT, LSHIFTRT]: Provide accurate costs for DImode shifts of integer constants. --- gcc/config/pa/pa.c | 33 +++++++++++++++++++++------------ 1 file changed, 21 insertions(+), 12 deletions(-) diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c index a9223ab3fe9..210e44f7660 100644 --- a/gcc/config/pa/pa.c +++ b/gcc/config/pa/pa.c @@ -1630,13 +1630,16 @@ hppa_rtx_costs (rtx x, machine_mode mode, int outer_code, case ASHIFT: if (mode == DImode) { - if (TARGET_64BIT) - *total = COSTS_N_INSNS (3); - else if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) + if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) { - *total = COSTS_N_INSNS (2); + if (TARGET_64BIT) + *total = COSTS_N_INSNS (1); + else + *total = COSTS_N_INSNS (2); return true; } + else if (TARGET_64BIT) + *total = COSTS_N_INSNS (3); else if (speed) *total = COSTS_N_INSNS (13); else @@ -1661,13 +1664,16 @@ hppa_rtx_costs (rtx x, machine_mode mode, int outer_code, case ASHIFTRT: if (mode == DImode) { - if (TARGET_64BIT) - *total = COSTS_N_INSNS (3); - else if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) + if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) { - *total = COSTS_N_INSNS (2); + if (TARGET_64BIT) + *total = COSTS_N_INSNS (1); + else + *total = COSTS_N_INSNS (2); return true; } + else if (TARGET_64BIT) + *total = COSTS_N_INSNS (3); else if (speed) *total = COSTS_N_INSNS (14); else @@ -1692,13 +1698,16 @@ hppa_rtx_costs (rtx x, machine_mode mode, int outer_code, case LSHIFTRT: if (mode == DImode) { - if (TARGET_64BIT) - *total = COSTS_N_INSNS (2); - else if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) + if (REG_P (XEXP (x, 0)) && CONST_INT_P (XEXP (x, 1))) { - *total = COSTS_N_INSNS (2); + if (TARGET_64BIT) + *total = COSTS_N_INSNS (1); + else + *total = COSTS_N_INSNS (2); return true; } + else if (TARGET_64BIT) + *total = COSTS_N_INSNS (2); else if (speed) *total = COSTS_N_INSNS (12); else -- 2.30.2