diff options
Diffstat (limited to 'gcc/config/arm/arm.c')
| -rw-r--r-- | gcc/config/arm/arm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 870e56e..cc023c1 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -6228,6 +6228,15 @@ thumb1_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer) else if ((outer == IOR || outer == XOR || outer == AND) && INTVAL (x) < 256 && INTVAL (x) >= -256) return COSTS_N_INSNS (1); + else if (outer == AND) + { + int i; + /* This duplicates the tests in the andsi3 expander. */ + for (i = 9; i <= 31; i++) + if ((((HOST_WIDE_INT) 1) << i) - 1 == INTVAL (x) + || (((HOST_WIDE_INT) 1) << i) - 1 == ~INTVAL (x)) + return COSTS_N_INSNS (2); + } else if (outer == ASHIFT || outer == ASHIFTRT || outer == LSHIFTRT) return 0; |