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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/ia64/ia64.c | 12 |
2 files changed, 17 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 91e2631..ea8a5ae 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-06-29 Richard Henderson <rth@redhat.com> + + * config/ia64/ia64.c (ia64_expand_vecint_minmax): Use us_minus and + plus for V4HImode UMAX. + 2005-06-29 Joseph S. Myers <joseph@codesourcery.com> * c-tree.h (default_function_array_conversion): Take and return diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c index 85d0bd2..f8f3463 100644 --- a/gcc/config/ia64/ia64.c +++ b/gcc/config/ia64/ia64.c @@ -1689,6 +1689,18 @@ ia64_expand_vecint_minmax (enum rtx_code code, enum machine_mode mode, if (mode == V4HImode && (code == SMIN || code == SMAX)) return false; + /* This combination can be implemented with only saturating subtraction. */ + if (mode == V4HImode && code == UMAX) + { + rtx x, tmp = gen_reg_rtx (mode); + + x = gen_rtx_US_MINUS (mode, operands[1], operands[2]); + emit_insn (gen_rtx_SET (VOIDmode, tmp, x)); + + emit_insn (gen_addv4hi3 (operands[0], tmp, operands[2])); + return true; + } + /* Everything else implemented via vector comparisons. */ xops[0] = operands[0]; xops[4] = xops[1] = operands[1]; |