jimzah/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2024-11-27 07:32:44 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity
426e737292
zig/lib/compiler_rt/subdf3.zig

22 lines
685 B
Zig
Raw Normal View History

compiler-rt: break up functions even more The purpose of this branch is to switch to using an object file for each independent function, in order to make linking simpler - instead of relying on `-ffunction-sections` and `--gc-sections`, which involves the linker doing the work of linking everything and then undoing work via garbage collection, this will allow the linker to only include the compilation units that are depended on in the first place. This commit makes progress towards that goal.
2022-06-16 07:09:56 +01:00
const common = @import("./common.zig");
pub const panic = common.panic;
comptime {
if (common.want_aeabi) {
compiler-rt: Set the symbol visibility When we're compiling compiler_rt for any WebAssembly target, we do not want to expose all the compiler-rt functions to the host runtime. By setting the visibility of all exports to `hidden`, we allow the linker to resolve the symbols during linktime, while not expose the functions to the host runtime. This also means the linker can properly garbage collect any compiler-rt function that does not get resolved. The symbol visibility for all target remains the same as before: `default`.
2022-12-28 13:57:17 +00:00
@export(__aeabi_dsub, .{ .name = "__aeabi_dsub", .linkage = common.linkage, .visibility = common.visibility });
compiler-rt: break up functions even more The purpose of this branch is to switch to using an object file for each independent function, in order to make linking simpler - instead of relying on `-ffunction-sections` and `--gc-sections`, which involves the linker doing the work of linking everything and then undoing work via garbage collection, this will allow the linker to only include the compilation units that are depended on in the first place. This commit makes progress towards that goal.
2022-06-16 07:09:56 +01:00
} else {
compiler-rt: Set the symbol visibility When we're compiling compiler_rt for any WebAssembly target, we do not want to expose all the compiler-rt functions to the host runtime. By setting the visibility of all exports to `hidden`, we allow the linker to resolve the symbols during linktime, while not expose the functions to the host runtime. This also means the linker can properly garbage collect any compiler-rt function that does not get resolved. The symbol visibility for all target remains the same as before: `default`.
2022-12-28 13:57:17 +00:00
@export(__subdf3, .{ .name = "__subdf3", .linkage = common.linkage, .visibility = common.visibility });
compiler-rt: break up functions even more The purpose of this branch is to switch to using an object file for each independent function, in order to make linking simpler - instead of relying on `-ffunction-sections` and `--gc-sections`, which involves the linker doing the work of linking everything and then undoing work via garbage collection, this will allow the linker to only include the compilation units that are depended on in the first place. This commit makes progress towards that goal.
2022-06-16 07:09:56 +01:00
}
}
fn __subdf3(a: f64, b: f64) callconv(.C) f64 {
all: migrate code to new cast builtin syntax Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
2023-06-22 18:46:56 +01:00
const neg_b = @as(f64, @bitCast(@as(u64, @bitCast(b)) ^ (@as(u64, 1) << 63)));
compiler-rt: break up functions even more The purpose of this branch is to switch to using an object file for each independent function, in order to make linking simpler - instead of relying on `-ffunction-sections` and `--gc-sections`, which involves the linker doing the work of linking everything and then undoing work via garbage collection, this will allow the linker to only include the compilation units that are depended on in the first place. This commit makes progress towards that goal.
2022-06-16 07:09:56 +01:00
return a + neg_b;
}
fn __aeabi_dsub(a: f64, b: f64) callconv(.AAPCS) f64 {
all: migrate code to new cast builtin syntax Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
2023-06-22 18:46:56 +01:00
const neg_b = @as(f64, @bitCast(@as(u64, @bitCast(b)) ^ (@as(u64, 1) << 63)));
compiler-rt: break up functions even more The purpose of this branch is to switch to using an object file for each independent function, in order to make linking simpler - instead of relying on `-ffunction-sections` and `--gc-sections`, which involves the linker doing the work of linking everything and then undoing work via garbage collection, this will allow the linker to only include the compilation units that are depended on in the first place. This commit makes progress towards that goal.
2022-06-16 07:09:56 +01:00
return a + neg_b;
}
Reference in New Issue Copy Permalink