On 8/15/23 12:29, Edwin Lu wrote:
This patch is a modification of
https://gcc.gnu.org/pipermail/gcc-patches/2023-January/610115.html
following the discussion on
https://github.com/riscv-non-isa/riscv-c-api-doc/issues/32
Distinguish between explicit -mstrict-align and cpu tune param
for slow_unaligned_access=true/false.
Tested for regressions using rv32/64 multilib with newlib/linux
gcc/ChangeLog:
* config/riscv/riscv-c.cc (riscv_cpu_cpp_builtins):
Generate __riscv_unaligned_avoid with value 1 or
__riscv_unaligned_slow with value 1 or
__riscv_unaligned_fast with value 1
* config/riscv/riscv.cc (riscv_option_override):
Define riscv_user_wants_strict_align. Set
riscv_user_wants_strict_align to TARGET_STRICT_ALIGN
* config/riscv/riscv.h: Declare riscv_user_wants_strict_align
gcc/testsuite/ChangeLog:
* gcc.target/riscv/attribute-1.c: Check for
__riscv_unaligned_slow or __riscv_unaligned_fast
* gcc.target/riscv/attribute-4.c: Check for
__riscv_unaligned_avoid
* gcc.target/riscv/attribute-5.c: Check for
__riscv_unaligned_slow or __riscv_unaligned_fast
* gcc.target/riscv/predef-align-1.c: New test.
* gcc.target/riscv/predef-align-2.c: New test.
* gcc.target/riscv/predef-align-3.c: New test.
* gcc.target/riscv/predef-align-4.c: New test.
* gcc.target/riscv/predef-align-5.c: New test.
* gcc.target/riscv/predef-align-6.c: New test.
OK. Though I'm pretty sure the commit hooks are going to complain about
your ChangeLog :-)
jeff
