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| author | Richard Henderson <rth@redhat.com> | 2011-01-17 10:18:24 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2011-01-17 10:18:24 -0800 |
| commit | 784f69be19ef920218a7b05d6fb2569596864afb (patch) | |
| tree | 8681175cc31c180190b4eb6e6854f2044b49208b /gcc | |
| parent | f033541c61c4d7ca041a52c842d9358841334017 (diff) | |
| download | gcc-784f69be19ef920218a7b05d6fb2569596864afb.zip gcc-784f69be19ef920218a7b05d6fb2569596864afb.tar.gz gcc-784f69be19ef920218a7b05d6fb2569596864afb.tar.bz2 | |
rx: Replace sat builtin with ssaddsi3 pattern.
A standalone __builtin_rx_sat isn't implementable due to needing
to keep the flags live before reload. Instead provide a saturating
add pattern, which hopefully will be pattern-matched by high-level
optimizations.
From-SVN: r168928
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/rx/rx.c | 4 | ||||
| -rw-r--r-- | gcc/config/rx/rx.md | 41 |
3 files changed, 37 insertions, 14 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4b6aa41..8683ed3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2011-01-17 Richard Henderson <rth@redhat.com> + * config/rx/rx.c (RX_BUILTIN_SAT): Remove. + (rx_init_builtins): Remove sat builtin. + (rx_expand_builtin): Likewise. + * config/rx/rx.md (ssaddsi3): New. + (*sat): Rename from sat. Represent the CC_REG input. + * config/rx/predicates.md (rshift_operator): New. * config/rx/rx.c (rx_expand_insv): Remove. * config/rx/rx-protos.h: Update. diff --git a/gcc/config/rx/rx.c b/gcc/config/rx/rx.c index 8cc46e7..0179b1f 100644 --- a/gcc/config/rx/rx.c +++ b/gcc/config/rx/rx.c @@ -1847,7 +1847,6 @@ enum rx_builtin RX_BUILTIN_REVW, RX_BUILTIN_RMPA, RX_BUILTIN_ROUND, - RX_BUILTIN_SAT, RX_BUILTIN_SETPSW, RX_BUILTIN_WAIT, RX_BUILTIN_max @@ -1902,7 +1901,6 @@ rx_init_builtins (void) ADD_RX_BUILTIN1 (RACW, "racw", void, integer); ADD_RX_BUILTIN1 (ROUND, "round", intSI, float); ADD_RX_BUILTIN1 (REVW, "revw", intSI, intSI); - ADD_RX_BUILTIN1 (SAT, "sat", intSI, intSI); ADD_RX_BUILTIN1 (WAIT, "wait", void, void); } @@ -2100,8 +2098,6 @@ rx_expand_builtin (tree exp, case RX_BUILTIN_ROUND: return rx_expand_builtin_round (op, target); case RX_BUILTIN_REVW: return rx_expand_int_builtin_1_arg (op, target, gen_revw, false); - case RX_BUILTIN_SAT: return rx_expand_int_builtin_1_arg - (op, target, gen_sat, false); case RX_BUILTIN_WAIT: emit_insn (gen_wait ()); return NULL_RTX; default: diff --git a/gcc/config/rx/rx.md b/gcc/config/rx/rx.md index 7fa8668..a3db92c 100644 --- a/gcc/config/rx/rx.md +++ b/gcc/config/rx/rx.md @@ -1378,6 +1378,37 @@ [(set_attr "length" "3,2,3")] ) +;; Saturate to 32-bits +(define_insn_and_split "ssaddsi3" + [(set (match_operand:SI 0 "register_operand" "=r") + (ss_plus:SI (match_operand:SI 1 "register_operand" "r") + (match_operand:SI 2 "rx_source_operand" "riQ"))) + (clobber (reg:CC CC_REG))] + "" + "#" + "reload_completed" + [(parallel [(set (match_dup 0) + (plus:SI (match_dup 1) (match_dup 2))) + (set (reg:CC_ZSC CC_REG) + (compare:CC_ZSC + (plus:SI (match_dup 1) (match_dup 2)) + (const_int 0)))]) + (set (match_dup 0) + (unspec:SI [(match_dup 0) (reg:CC CC_REG)] + UNSPEC_BUILTIN_SAT))] + "" +) + +(define_insn "*sat" + [(set (match_operand:SI 0 "register_operand" "=r") + (unspec:SI [(match_operand:SI 1 "register_operand" "0") + (reg:CC CC_REG)] + UNSPEC_BUILTIN_SAT))] + "reload_completed" + "sat\t%0" + [(set_attr "length" "2")] +) + (define_insn "subsi3" [(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r") (minus:SI (match_operand:SI 1 "register_operand" "0,0,0,r,0") @@ -2068,16 +2099,6 @@ (set_attr "length" "3,5")] ) -;; Saturate to 32-bits -(define_insn "sat" - [(set (match_operand:SI 0 "register_operand" "=r") - (unspec:SI [(match_operand:SI 1 "register_operand" "0")] - UNSPEC_BUILTIN_SAT))] - "" - "sat\t%0" - [(set_attr "length" "2")] -) - ;;---------- Control Registers ------------------------ ;; Clear Processor Status Word |