sh.h (TARGET_DYNSHIFT): New macro.
* config/sh/sh.h (TARGET_DYNSHIFT): New macro. (SH_DYNAMIC_SHIFT_COST): Use it. * config/sh/sh.c (expand_ashiftrt, shl_sext_kind): Likewise. (sh_dynamicalize_shift_p): Add TARGET_DYNSHIFT condition. Add sanity check for input value. Add function description. * config/sh/sh.md (ashlsi3, ashlsi3_std, ashrsi3_d, lshrsi3, lshrsi3_d): Use TARGET_DYNSHIFT. From-SVN: r189760
This commit is contained in:
Oleg Endo
parent
7222fdd830
commit
a594120bfe
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@ -1,3 +1,13 @@
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2012-07-22 Oleg Endo <olegendo@gcc.gnu.org>
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* config/sh/sh.h (TARGET_DYNSHIFT): New macro.
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(SH_DYNAMIC_SHIFT_COST): Use it.
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* config/sh/sh.c (expand_ashiftrt, shl_sext_kind): Likewise.
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(sh_dynamicalize_shift_p): Add TARGET_DYNSHIFT condition.
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Add sanity check for input value. Add function description.
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* config/sh/sh.md (ashlsi3, ashlsi3_std, ashrsi3_d, lshrsi3,
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lshrsi3_d): Use TARGET_DYNSHIFT.
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2012-07-22 Oleg Endo <olegendo@gcc.gnu.org>
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* config/sh/sh.md (negc): Delete expander.
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@ -3437,7 +3437,7 @@ expand_ashiftrt (rtx *operands)
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char func[18];
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int value;
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if (TARGET_SH3 || TARGET_SH2A)
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if (TARGET_DYNSHIFT)
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{
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if (!CONST_INT_P (operands[2]))
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{
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@ -3507,10 +3507,16 @@ expand_ashiftrt (rtx *operands)
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return true;
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}
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/* Return true if it is potentially beneficial to use a dynamic shift
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instruction (shad / shar) instead of a combination of 1/2/8/16
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shift instructions for the specified shift count.
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If dynamic shifts are not available, always return false. */
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bool
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sh_dynamicalize_shift_p (rtx count)
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{
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return shift_insns[INTVAL (count) & 31] > 1 + SH_DYNAMIC_SHIFT_COST;
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gcc_assert (CONST_INT_P (count));
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return TARGET_DYNSHIFT
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&& (shift_insns[INTVAL (count) & 31] > 1 + SH_DYNAMIC_SHIFT_COST);
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}
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/* Try to find a good way to implement the combiner pattern
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@ -3886,7 +3892,7 @@ shl_sext_kind (rtx left_rtx, rtx size_rtx, int *costp)
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}
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}
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}
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if (TARGET_SH3 || TARGET_SH2A)
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if (TARGET_DYNSHIFT)
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{
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/* Try to use a dynamic shift. */
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cost = shift_insns[32 - insize] + 1 + SH_DYNAMIC_SHIFT_COST;
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@ -1928,6 +1928,13 @@ struct sh_args {
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/* Nonzero if access to memory by bytes is no faster than for words. */
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#define SLOW_BYTE_ACCESS 1
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/* Nonzero if the target supports dynamic shift instructions
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like shad and shld. */
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#define TARGET_DYNSHIFT (TARGET_SH3 || TARGET_SH2A)
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#define SH_DYNAMIC_SHIFT_COST \
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(TARGET_HARD_SH4 ? 1 : TARGET_DYNSHIFT ? (optimize_size ? 1 : 2) : 20)
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/* Immediate shift counts are truncated by the output routines (or was it
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the assembler?). Shift counts in a register are truncated by SH. Note
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that the native compiler puts too large (> 32) immediate shift counts
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@ -2317,11 +2324,6 @@ extern int current_function_interrupt;
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prologue rather than duplicate around each call. */
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#define ACCUMULATE_OUTGOING_ARGS TARGET_ACCUMULATE_OUTGOING_ARGS
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#define SH_DYNAMIC_SHIFT_COST \
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(TARGET_HARD_SH4 ? 1 \
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: (TARGET_SH3 || TARGET_SH2A) ? (optimize_size ? 1 : 2) : 20)
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#define NUM_MODES_FOR_MODE_SWITCHING { FP_MODE_NONE }
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#define OPTIMIZE_MODE_SWITCHING(ENTITY) (TARGET_SH4 || TARGET_SH2A_DOUBLE)
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@ -3514,7 +3514,7 @@ label:
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if (CONST_INT_P (operands[2])
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&& sh_dynamicalize_shift_p (operands[2]))
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operands[2] = force_reg (SImode, operands[2]);
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if (TARGET_SH3 || TARGET_SH2A)
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if (TARGET_DYNSHIFT)
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{
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emit_insn (gen_ashlsi3_std (operands[0], operands[1], operands[2]));
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DONE;
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@ -3530,14 +3530,13 @@ label:
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(ashift:SI (match_operand:SI 1 "arith_reg_operand" "0,0,0,0")
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(match_operand:SI 2 "nonmemory_operand" "r,M,P27,?ri")))
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(clobber (match_scratch:SI 3 "=X,X,X,&r"))]
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"(TARGET_SH3 || TARGET_SH2A)
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|| (TARGET_SH1 && satisfies_constraint_P27 (operands[2]))"
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"TARGET_DYNSHIFT || (TARGET_SH1 && satisfies_constraint_P27 (operands[2]))"
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"@
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shld %2,%0
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add %0,%0
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shll%O2 %0
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#"
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"(TARGET_SH3 || TARGET_SH2A)
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"TARGET_DYNSHIFT
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&& reload_completed
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&& CONST_INT_P (operands[2])
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&& ! satisfies_constraint_P27 (operands[2])"
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@ -3797,7 +3796,7 @@ label:
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[(set (match_operand:SI 0 "arith_reg_dest" "=r")
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(ashiftrt:SI (match_operand:SI 1 "arith_reg_operand" "0")
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(neg:SI (match_operand:SI 2 "arith_reg_operand" "r"))))]
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"TARGET_SH3 || TARGET_SH2A"
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"TARGET_DYNSHIFT"
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"shad %2,%0"
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[(set_attr "type" "dyn_shift")])
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@ -3912,7 +3911,7 @@ label:
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if (CONST_INT_P (operands[2])
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&& sh_dynamicalize_shift_p (operands[2]))
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operands[2] = force_reg (SImode, operands[2]);
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if ((TARGET_SH3 || TARGET_SH2A)
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if (TARGET_DYNSHIFT
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&& arith_reg_operand (operands[2], GET_MODE (operands[2])))
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{
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rtx count = copy_to_mode_reg (SImode, operands[2]);
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@ -3928,7 +3927,7 @@ label:
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[(set (match_operand:SI 0 "arith_reg_dest" "=r")
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(lshiftrt:SI (match_operand:SI 1 "arith_reg_operand" "0")
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(neg:SI (match_operand:SI 2 "arith_reg_operand" "r"))))]
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"TARGET_SH3 || TARGET_SH2A"
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"TARGET_DYNSHIFT"
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"shld %2,%0"
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[(set_attr "type" "dyn_shift")])
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