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| author | Stan Cox <coxs@gnu.org> | 1996-06-09 02:13:52 +0000 |
|---|---|---|
| committer | Stan Cox <coxs@gnu.org> | 1996-06-09 02:13:52 +0000 |
| commit | 76565a249e558a9c9ddde2da934929becd8d293e (patch) | |
| tree | 87b515251459294eb2813c4f7729c2733bea7ef2 /gcc | |
| parent | 2d49677f9c86b2daf35e3cef2e3ff4635fb15dfc (diff) | |
| download | gcc-76565a249e558a9c9ddde2da934929becd8d293e.zip gcc-76565a249e558a9c9ddde2da934929becd8d293e.tar.gz gcc-76565a249e558a9c9ddde2da934929becd8d293e.tar.bz2 | |
i386.h (CONST_COSTS): even integer constants have a cost.
From-SVN: r12255
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.h | 55 |
1 files changed, 44 insertions, 11 deletions
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index 2e60d4d..c30b16d 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -1804,7 +1804,7 @@ while (0) case CONST: \ case LABEL_REF: \ case SYMBOL_REF: \ - return flag_pic && SYMBOLIC_CONST (RTX) ? 2 : 0; \ + return flag_pic && SYMBOLIC_CONST (RTX) ? 2 : 1; \ \ case CONST_DOUBLE: \ { \ @@ -1818,6 +1818,9 @@ while (0) 2; \ } +/* Delete the definition here when TOPLEVEL_COSTS_N_INSNS gets added to cse.c */ +#define TOPLEVEL_COSTS_N_INSNS(N) {total = COSTS_N_INSNS (N); break;} + /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be used, for example, to indicate how costly a multiply instruction is. In writing this macro, you can use the construct @@ -1836,10 +1839,10 @@ while (0) HOST_WIDE_INT value = INTVAL (XEXP (X, 1)); \ \ if (value == 1) \ - return COSTS_N_INSNS (ix86_cost->add); \ + return COSTS_N_INSNS (ix86_cost->add) + rtx_cost(XEXP (X, 0));\ \ if (value == 2 || value == 3) \ - return COSTS_N_INSNS (ix86_cost->lea); \ + return COSTS_N_INSNS (ix86_cost->lea) + rtx_cost(XEXP (X, 0));\ } \ /* fall through */ \ \ @@ -1847,9 +1850,22 @@ while (0) case ASHIFTRT: \ case LSHIFTRT: \ case ROTATERT: \ - return COSTS_N_INSNS ((GET_CODE (XEXP (X, 1)) == CONST_INT) \ - ? ix86_cost->shift_const \ - : ix86_cost->shift_var); \ + if (GET_MODE (XEXP (X, 0)) == DImode) \ + { \ + if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ + if (INTVAL (XEXP (X, 1)) > 32) \ + return COSTS_N_INSNS(ix86_cost->shift_const + 2); \ + else \ + return COSTS_N_INSNS(ix86_cost->shift_const * 2); \ + return ((GET_CODE (XEXP (X, 1)) == AND \ + ? COSTS_N_INSNS(ix86_cost->shift_var * 2) \ + : COSTS_N_INSNS(ix86_cost->shift_var * 6 + 2)) \ + + rtx_cost(XEXP (X, 0))); \ + } \ + return COSTS_N_INSNS (GET_CODE (XEXP (X, 1)) == CONST_INT \ + ? ix86_cost->shift_const \ + : ix86_cost->shift_var) \ + + rtx_cost(XEXP (X, 0)); \ \ case MULT: \ if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ @@ -1857,25 +1873,36 @@ while (0) unsigned HOST_WIDE_INT value = INTVAL (XEXP (X, 1)); \ int nbits = 0; \ \ + if (value == 2) \ + return COSTS_N_INSNS (ix86_cost->add) + rtx_cost(XEXP (X, 0));\ + \ + if (value == 4 || value == 8) \ + return COSTS_N_INSNS (ix86_cost->lea) + rtx_cost(XEXP (X, 0));\ + \ while (value != 0) \ { \ nbits++; \ value >>= 1; \ } \ \ + if (nbits == 1) \ + return COSTS_N_INSNS (ix86_cost->shift_const) \ + + rtx_cost(XEXP (X, 0)); \ + \ return COSTS_N_INSNS (ix86_cost->mult_init \ - + nbits * ix86_cost->mult_bit); \ + + nbits * ix86_cost->mult_bit) \ + + rtx_cost(XEXP (X, 0)); \ } \ \ else /* This is arbitrary */ \ - return COSTS_N_INSNS (ix86_cost->mult_init \ - + 7 * ix86_cost->mult_bit); \ + TOPLEVEL_COSTS_N_INSNS (ix86_cost->mult_init \ + + 7 * ix86_cost->mult_bit); \ \ case DIV: \ case UDIV: \ case MOD: \ case UMOD: \ - return COSTS_N_INSNS (ix86_cost->divide); \ + TOPLEVEL_COSTS_N_INSNS (ix86_cost->divide); \ \ case PLUS: \ if (GET_CODE (XEXP (X, 0)) == REG \ @@ -1888,9 +1915,15 @@ while (0) case IOR: \ case XOR: \ case MINUS: \ + if (GET_MODE (X) == DImode) \ + return COSTS_N_INSNS (ix86_cost->add) * 2 \ + + (rtx_cost (XEXP (X, 0)) << (GET_MODE (XEXP (X, 0)) != DImode))\ + + (rtx_cost (XEXP (X, 1)) << (GET_MODE (XEXP (X, 1)) != DImode));\ case NEG: \ case NOT: \ - return COSTS_N_INSNS (ix86_cost->add); + if (GET_MODE (X) == DImode) \ + TOPLEVEL_COSTS_N_INSNS (ix86_cost->add * 2) \ + TOPLEVEL_COSTS_N_INSNS (ix86_cost->add) /* An expression giving the cost of an addressing mode that contains |