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| author | YunQiang Su <yunqiang.su@cipunited.com> | 2023-06-01 10:14:24 +0800 |
|---|---|---|
| committer | YunQiang Su <yunqiang.su@cipunited.com> | 2023-06-05 11:22:00 +0800 |
| commit | 29b74545531f6afbee9fc38c267524326dbfbedf (patch) | |
| tree | 620a0208b1198e972d3b2aa50a3e5909cbae38f1 /gcc/config/mips | |
| parent | c7fe7ad612bb6aac1d078d215d5700ec4ef70e3c (diff) | |
| download | gcc-29b74545531f6afbee9fc38c267524326dbfbedf.zip gcc-29b74545531f6afbee9fc38c267524326dbfbedf.tar.gz gcc-29b74545531f6afbee9fc38c267524326dbfbedf.tar.bz2 | |
MIPS: Add speculation_barrier support
speculation_barrier for MIPS needs sync+jr.hb (r2+),
so we implement __speculation_barrier in libgcc, like arm32 does.
gcc/ChangeLog:
* config/mips/mips-protos.h (mips_emit_speculation_barrier): New
prototype.
* config/mips/mips.cc (speculation_barrier_libfunc): New static
variable.
(mips_init_libfuncs): Initialize it.
(mips_emit_speculation_barrier): New function.
* config/mips/mips.md (speculation_barrier): Call
mips_emit_speculation_barrier.
libgcc/ChangeLog:
* config/mips/lib1funcs.S: New file.
define __speculation_barrier and include mips16.S.
* config/mips/t-mips: define LIB1ASMSRC as mips/lib1funcs.S.
define LIB1ASMFUNCS as _speculation_barrier.
set version info for __speculation_barrier.
* config/mips/libgcc-mips.ver: New file.
* config/mips/t-mips16: don't define LIB1ASMSRC as mips16.S
included in lib1funcs.S now.
Diffstat (limited to 'gcc/config/mips')
| -rw-r--r-- | gcc/config/mips/mips-protos.h | 2 | ||||
| -rw-r--r-- | gcc/config/mips/mips.cc | 12 | ||||
| -rw-r--r-- | gcc/config/mips/mips.md | 12 |
3 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/mips/mips-protos.h b/gcc/config/mips/mips-protos.h index 2048346..da7902c 100644 --- a/gcc/config/mips/mips-protos.h +++ b/gcc/config/mips/mips-protos.h @@ -388,4 +388,6 @@ extern void mips_register_frame_header_opt (void); extern void mips_expand_vec_cond_expr (machine_mode, machine_mode, rtx *); extern void mips_expand_vec_cmp_expr (rtx *); +extern void mips_emit_speculation_barrier_function (void); + #endif /* ! GCC_MIPS_PROTOS_H */ diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc index ca491b9..c1d1691 100644 --- a/gcc/config/mips/mips.cc +++ b/gcc/config/mips/mips.cc @@ -13611,6 +13611,9 @@ mips_autovectorize_vector_modes (vector_modes *modes, bool) return 0; } + +static GTY (()) rtx speculation_barrier_libfunc; + /* Implement TARGET_INIT_LIBFUNCS. */ static void @@ -13680,6 +13683,7 @@ mips_init_libfuncs (void) synchronize_libfunc = init_one_libfunc ("__sync_synchronize"); init_sync_libfuncs (UNITS_PER_WORD); } + speculation_barrier_libfunc = init_one_libfunc ("__speculation_barrier"); } /* Build up a multi-insn sequence that loads label TARGET into $AT. */ @@ -19092,6 +19096,14 @@ mips_avoid_hazard (rtx_insn *after, rtx_insn *insn, int *hilo_delay, } } +/* Emit a speculation barrier. + JR.HB is needed, so we put speculation_barrier_libfunc in libgcc. */ +void +mips_emit_speculation_barrier_function () +{ + emit_library_call (speculation_barrier_libfunc, LCT_NORMAL, VOIDmode); +} + /* A SEQUENCE is breakable iff the branch inside it has a compact form and the target has compact branches. */ diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md index ac1d77a..5d04ac5 100644 --- a/gcc/config/mips/mips.md +++ b/gcc/config/mips/mips.md @@ -160,6 +160,8 @@ ;; The `.insn' pseudo-op. UNSPEC_INSN_PSEUDO UNSPEC_JRHB + + VUNSPEC_SPECULATION_BARRIER ]) (define_constants @@ -7455,6 +7457,16 @@ mips_expand_conditional_move (operands); DONE; }) + +(define_expand "speculation_barrier" + [(unspec_volatile [(const_int 0)] VUNSPEC_SPECULATION_BARRIER)] + "" + " + mips_emit_speculation_barrier_function (); + DONE; + " +) + ;; ;; .................... |