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| author | Yangyu Chen <cyy@cyyself.name> | 2024-11-05 11:22:00 +0800 |
|---|---|---|
| committer | Kito Cheng <kito.cheng@sifive.com> | 2024-11-13 17:01:42 +0800 |
| commit | 6b572d4eecc99c4a014ce1eab5e79976e30f4d9f (patch) | |
| tree | fd57b5ad1e75d0e5bbf1546c3f5bce55d69601f7 /gcc | |
| parent | 9bf0dbe67244fffc5cb939e51ead2876557c8c37 (diff) | |
| download | gcc-6b572d4eecc99c4a014ce1eab5e79976e30f4d9f.zip gcc-6b572d4eecc99c4a014ce1eab5e79976e30f4d9f.tar.gz gcc-6b572d4eecc99c4a014ce1eab5e79976e30f4d9f.tar.bz2 | |
RISC-V: Implement Priority syntax parser for Function Multi-Versioning
This patch adds the priority syntax parser to support the Function
Multi-Versioning (FMV) feature in RISC-V. This feature allows users to
specify the priority of the function version in the attribute syntax.
Chnages based on RISC-V C-API PR:
https://github.com/riscv-non-isa/riscv-c-api-doc/pull/85
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
gcc/ChangeLog:
* config/riscv/riscv-target-attr.cc
(riscv_target_attr_parser::handle_priority): New function.
(riscv_target_attr_parser::update_settings): Update priority
attribute.
* config/riscv/riscv.opt: Add TargetVariable riscv_fmv_priority.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/riscv/riscv-target-attr.cc | 24 | ||||
| -rw-r--r-- | gcc/config/riscv/riscv.opt | 3 |
2 files changed, 27 insertions, 0 deletions
diff --git a/gcc/config/riscv/riscv-target-attr.cc b/gcc/config/riscv/riscv-target-attr.cc index 8ce9607..293d532 100644 --- a/gcc/config/riscv/riscv-target-attr.cc +++ b/gcc/config/riscv/riscv-target-attr.cc @@ -39,16 +39,19 @@ public: : m_found_arch_p (false) , m_found_tune_p (false) , m_found_cpu_p (false) + , m_found_priority_p (false) , m_subset_list (nullptr) , m_loc (loc) , m_cpu_info (nullptr) , m_tune (nullptr) + , m_priority (0) { } bool handle_arch (const char *); bool handle_cpu (const char *); bool handle_tune (const char *); + bool handle_priority (const char *); void update_settings (struct gcc_options *opts) const; private: @@ -58,10 +61,12 @@ private: bool m_found_arch_p; bool m_found_tune_p; bool m_found_cpu_p; + bool m_found_priority_p; riscv_subset_list *m_subset_list; location_t m_loc; const riscv_cpu_info *m_cpu_info; const char *m_tune; + int m_priority; }; } @@ -210,6 +215,22 @@ riscv_target_attr_parser::handle_tune (const char *str) return true; } +bool +riscv_target_attr_parser::handle_priority (const char *str) +{ + if (m_found_priority_p) + error_at (m_loc, "%<target()%> attribute: priority appears more than once"); + m_found_priority_p = true; + + if (sscanf (str, "%d", &m_priority) != 1) + { + error_at (m_loc, "%<target()%> attribute: invalid priority %qs", str); + return false; + } + + return true; +} + void riscv_target_attr_parser::update_settings (struct gcc_options *opts) const { @@ -236,6 +257,9 @@ riscv_target_attr_parser::update_settings (struct gcc_options *opts) const if (m_cpu_info) opts->x_riscv_tune_string = m_cpu_info->tune; } + + if (m_priority) + opts->x_riscv_fmv_priority = m_priority; } /* Parse ARG_STR which contains the definition of one target attribute. diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt index 5bc5d30..ab9d6e8 100644 --- a/gcc/config/riscv/riscv.opt +++ b/gcc/config/riscv/riscv.opt @@ -523,6 +523,9 @@ Mask(XSFVCP) Var(riscv_sifive_subext) Mask(XSFCEASE) Var(riscv_sifive_subext) +TargetVariable +int riscv_fmv_priority = 0 + Enum Name(isa_spec_class) Type(enum riscv_isa_spec_class) Supported ISA specs (for use with the -misa-spec= option): |