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author | jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-07-25 13:31:44 +0000 |
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committer | jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-07-25 13:31:44 +0000 |
commit | 1a4cfc49c962e7e930fab6d37a116a7a410b322f (patch) | |
tree | 135369097b85f370b381fb571406c35476f36058 /gcc/config/aarch64 | |
parent | e3b21840e5b8231c0cfe1242248acedec174149f (diff) | |
download | gcc-1a4cfc49c962e7e930fab6d37a116a7a410b322f.tar.gz |
[AArch64][1/3] Migrate aarch64_add_constant to new interface & kill aarch64_build_constant
gcc/
* config/aarch64/aarch64.c (aarch64_add_constant): New parameter "mode".
Use aarch64_internal_mov_immediate instead of aarch64_build_constant.
(aarch64_output_mi_thunk): Pass Pmode when calling aarch64_add_constant.
(aarch64_build_constant): Delete.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238712 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/aarch64')
-rw-r--r-- | gcc/config/aarch64/aarch64.c | 103 |
1 files changed, 13 insertions, 90 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 5b1595c0756..92c4ae4777a 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -3412,98 +3412,20 @@ aarch64_final_eh_return_addr (void) - 2 * UNITS_PER_WORD)); } -/* Possibly output code to build up a constant in a register. For - the benefit of the costs infrastructure, returns the number of - instructions which would be emitted. GENERATE inhibits or - enables code generation. */ - -static int -aarch64_build_constant (int regnum, HOST_WIDE_INT val, bool generate) -{ - int insns = 0; - - if (aarch64_bitmask_imm (val, DImode)) - { - if (generate) - emit_move_insn (gen_rtx_REG (Pmode, regnum), GEN_INT (val)); - insns = 1; - } - else - { - int i; - int ncount = 0; - int zcount = 0; - HOST_WIDE_INT valp = val >> 16; - HOST_WIDE_INT valm; - HOST_WIDE_INT tval; - - for (i = 16; i < 64; i += 16) - { - valm = (valp & 0xffff); - - if (valm != 0) - ++ zcount; - - if (valm != 0xffff) - ++ ncount; - - valp >>= 16; - } - - /* zcount contains the number of additional MOVK instructions - required if the constant is built up with an initial MOVZ instruction, - while ncount is the number of MOVK instructions required if starting - with a MOVN instruction. Choose the sequence that yields the fewest - number of instructions, preferring MOVZ instructions when they are both - the same. */ - if (ncount < zcount) - { - if (generate) - emit_move_insn (gen_rtx_REG (Pmode, regnum), - GEN_INT (val | ~(HOST_WIDE_INT) 0xffff)); - tval = 0xffff; - insns++; - } - else - { - if (generate) - emit_move_insn (gen_rtx_REG (Pmode, regnum), - GEN_INT (val & 0xffff)); - tval = 0; - insns++; - } - - val >>= 16; - - for (i = 16; i < 64; i += 16) - { - if ((val & 0xffff) != tval) - { - if (generate) - emit_insn (gen_insv_immdi (gen_rtx_REG (Pmode, regnum), - GEN_INT (i), - GEN_INT (val & 0xffff))); - insns++; - } - val >>= 16; - } - } - return insns; -} - static void -aarch64_add_constant (int regnum, int scratchreg, HOST_WIDE_INT delta) +aarch64_add_constant (machine_mode mode, int regnum, int scratchreg, + HOST_WIDE_INT delta) { HOST_WIDE_INT mdelta = delta; - rtx this_rtx = gen_rtx_REG (Pmode, regnum); - rtx scratch_rtx = gen_rtx_REG (Pmode, scratchreg); + rtx this_rtx = gen_rtx_REG (mode, regnum); + rtx scratch_rtx = gen_rtx_REG (mode, scratchreg); if (mdelta < 0) mdelta = -mdelta; if (mdelta >= 4096 * 4096) { - (void) aarch64_build_constant (scratchreg, delta, true); + aarch64_internal_mov_immediate (scratch_rtx, GEN_INT (delta), true, mode); emit_insn (gen_add3_insn (this_rtx, this_rtx, scratch_rtx)); } else if (mdelta > 0) @@ -3511,19 +3433,19 @@ aarch64_add_constant (int regnum, int scratchreg, HOST_WIDE_INT delta) if (mdelta >= 4096) { emit_insn (gen_rtx_SET (scratch_rtx, GEN_INT (mdelta / 4096))); - rtx shift = gen_rtx_ASHIFT (Pmode, scratch_rtx, GEN_INT (12)); + rtx shift = gen_rtx_ASHIFT (mode, scratch_rtx, GEN_INT (12)); if (delta < 0) emit_insn (gen_rtx_SET (this_rtx, - gen_rtx_MINUS (Pmode, this_rtx, shift))); + gen_rtx_MINUS (mode, this_rtx, shift))); else emit_insn (gen_rtx_SET (this_rtx, - gen_rtx_PLUS (Pmode, this_rtx, shift))); + gen_rtx_PLUS (mode, this_rtx, shift))); } if (mdelta % 4096 != 0) { scratch_rtx = GEN_INT ((delta < 0 ? -1 : 1) * (mdelta % 4096)); emit_insn (gen_rtx_SET (this_rtx, - gen_rtx_PLUS (Pmode, this_rtx, scratch_rtx))); + gen_rtx_PLUS (mode, this_rtx, scratch_rtx))); } } } @@ -3548,7 +3470,7 @@ aarch64_output_mi_thunk (FILE *file, tree thunk ATTRIBUTE_UNUSED, emit_note (NOTE_INSN_PROLOGUE_END); if (vcall_offset == 0) - aarch64_add_constant (this_regno, IP1_REGNUM, delta); + aarch64_add_constant (Pmode, this_regno, IP1_REGNUM, delta); else { gcc_assert ((vcall_offset & (POINTER_BYTES - 1)) == 0); @@ -3564,7 +3486,7 @@ aarch64_output_mi_thunk (FILE *file, tree thunk ATTRIBUTE_UNUSED, addr = gen_rtx_PRE_MODIFY (Pmode, this_rtx, plus_constant (Pmode, this_rtx, delta)); else - aarch64_add_constant (this_regno, IP1_REGNUM, delta); + aarch64_add_constant (Pmode, this_regno, IP1_REGNUM, delta); } if (Pmode == ptr_mode) @@ -3578,7 +3500,8 @@ aarch64_output_mi_thunk (FILE *file, tree thunk ATTRIBUTE_UNUSED, addr = plus_constant (Pmode, temp0, vcall_offset); else { - (void) aarch64_build_constant (IP1_REGNUM, vcall_offset, true); + aarch64_internal_mov_immediate (temp1, GEN_INT (vcall_offset), true, + Pmode); addr = gen_rtx_PLUS (Pmode, temp0, temp1); } |