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From: Philipp Tomsich <ptomsich@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/vendors/vrull/heads/for-upstream)] RISC-V: Use .p2align for code-alignment Date: Tue, 15 Nov 2022 15:00:33 +0000 (GMT) [thread overview] Message-ID: <20221115150033.0F21B3898385@sourceware.org> (raw) https://gcc.gnu.org/g:4c3df1ee1d9f3f1bfbb8e2527b70f229beda0f1f commit 4c3df1ee1d9f3f1bfbb8e2527b70f229beda0f1f Author: Philipp Tomsich <philipp.tomsich@vrull.eu> Date: Wed Mar 16 22:28:11 2022 +0100 RISC-V: Use .p2align for code-alignment RISC-V's .p2align (currently) ignores the max-skip argument. As we have experimental patches underway to address this in a backwards-compatible manner, let's prepare GCC for the day when binutils gets updated. gcc/ChangeLog: * config/riscv/riscv.h (ASM_OUTPUT_MAX_SKIP_ALIGN): Implement. Series-to: gcc-patches@gcc.gnu.org Series-cc: Palmer Dabbelt <palmer@rivosinc.com> Series-cc: Vineet Gupta <vineetg@rivosinc.com> Series-cc: Christoph Muellner <christoph.muellner@vrull.eu> Series-cc: Kito Cheng <kito.cheng@gmail.com> Series-cc: Jeff Law <jlaw@ventanamicro.com> Diff: --- gcc/config/riscv/riscv.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h index 2d0d170645c3..c216173cf6ba 100644 --- a/gcc/config/riscv/riscv.h +++ b/gcc/config/riscv/riscv.h @@ -938,6 +938,24 @@ typedef struct { fprintf (STREAM, "\t.word\t%sL%d-%sL%d\n", \ LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL) +#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN +/* Support for -falign-* switches. Use .p2align to ensure that code + sections are padded with NOP instructions, rather than zeros. */ +#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ + do \ + { \ + if ((LOG) != 0) \ + { \ + if ((MAX_SKIP) == 0) \ + fprintf ((FILE), "\t.p2align %d\n", (int) (LOG)); \ + else \ + fprintf ((FILE), "\t.p2align %d,,%d\n", \ + (int) (LOG), (int) (MAX_SKIP)); \ + } \ + } while (0) + +#endif /* HAVE_GAS_MAX_SKIP_P2ALIGN */ + /* This is how to output an assembler line that says to advance the location counter to a multiple of 2**LOG bytes. */
next reply other threads:[~2022-11-15 15:00 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-15 15:00 Philipp Tomsich [this message] -- strict thread matches above, loose matches on Subject: below -- 2022-12-01 13:23 Philipp Tomsich 2022-11-18 20:26 Philipp Tomsich 2022-11-18 20:23 Philipp Tomsich 2022-11-18 11:35 Philipp Tomsich 2022-11-17 22:26 Philipp Tomsich 2022-11-15 14:02 Philipp Tomsich
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