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| author | Doug Kwan <dougkwan@google.com> | 2011-06-10 16:02:39 -0700 |
|---|---|---|
| committer | Doug Kwan <dougkwan@google.com> | 2011-06-10 16:02:39 -0700 |
| commit | fe2afdf3f3701489c05d2a7509752d6f0c7616f7 (patch) | |
| tree | 0f879781b400d82bd939cb03642fe57298875223 /gcc-4.4.3/gcc/config/i386/i386.md | |
| parent | fac2e2f3e863f49fc8a2feb2aa9fd8cfa315219c (diff) | |
| download | toolchain_gcc-fe2afdf3f3701489c05d2a7509752d6f0c7616f7.tar.gz toolchain_gcc-fe2afdf3f3701489c05d2a7509752d6f0c7616f7.tar.bz2 toolchain_gcc-fe2afdf3f3701489c05d2a7509752d6f0c7616f7.zip | |
Sync internal and external version:
Changes:
-x86 security patch (for ChromeOS)
-Fix bug in inlining.
-Fix freestanding C++ library build:
http://gcc.gnu.org/viewcvs?view=revision&revision=173220
-Fix out-of-range branches in Thumb-2 mode.
-Fix gcda file corruption problem.
-Hanlde LDFLAGS_FOR_TARGETS in configure. This is a backport of upstrem
patch r173558.
-Backport upstream fix for Atom performance at r164379.
Change-Id: Id5a6cfb8949cbd390a0bb3546d55d83383ee4f8c
Diffstat (limited to 'gcc-4.4.3/gcc/config/i386/i386.md')
| -rw-r--r-- | gcc-4.4.3/gcc/config/i386/i386.md | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/config/i386/i386.md b/gcc-4.4.3/gcc/config/i386/i386.md index bbe915112..7989c31db 100644 --- a/gcc-4.4.3/gcc/config/i386/i386.md +++ b/gcc-4.4.3/gcc/config/i386/i386.md @@ -77,6 +77,7 @@ (UNSPEC_TLSDESC 23) ; Other random patterns + (UNSPEC_NOPS 29) (UNSPEC_SCAS 30) (UNSPEC_FNSTSW 31) (UNSPEC_SAHF 32) @@ -15323,6 +15324,39 @@ (set_attr "length_immediate" "0") (set_attr "modrm" "0")]) +;; Generate nops. Operand 0 is the number of nops, up to 8. +(define_insn "nops" + [(unspec [(match_operand 0 "const_int_operand" "")] + UNSPEC_NOPS)] + "reload_completed" +{ + switch (INTVAL (operands[0])) + { + case 1: + return "nop"; + case 2: + return "nop; nop"; + case 3: + return "nop; nop; nop"; + case 4: + return "nop; nop; nop; nop"; + case 5: + return "nop; nop; nop; nop; nop"; + case 6: + return "nop; nop; nop; nop; nop; nop"; + case 7: + return "nop; nop; nop; nop; nop; nop; nop"; + case 8: + return "nop; nop; nop; nop; nop; nop; nop; nop"; + default: + gcc_unreachable (); + break; + } +} + [(set (attr "length") (symbol_ref "INTVAL (operands[0])")) + (set_attr "length_immediate" "0") + (set_attr "modrm" "0")]) + ;; Align to 16-byte boundary, max skip in op0. Used to avoid ;; branch prediction penalty for the third jump in a 16-byte ;; block on K8. |