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zig/lib/compiler_rt/floatuntidf.zig

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compiler_rt: Update Windows ABI for float<->int conversion routines Starting with LLVM 14, the Libcalls to these functions are now lowered using a Vec(2, u64) instead of the standard ABI for i128 integers, so our compiler-rt implementation needs to be updated to expose the same ABI on Windows.
2022-07-10 17:53:24 +01:00
const builtin = @import("builtin");
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");
const intToFloat = @import("./int_to_float.zig").intToFloat;
pub const panic = common.panic;
comptime {
compiler_rt: Slightly re-factor exports for Windows x86-64 This is just a cosmetic change. The goal is to keep the export logic relatively flat and centralized.
2022-07-11 00:42:58 +01:00
if (common.want_windows_v2u64_abi) {
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(__floatuntidf_windows_x86_64, .{ .name = "__floatuntidf", .linkage = common.linkage, .visibility = common.visibility });
compiler_rt: Slightly re-factor exports for Windows x86-64 This is just a cosmetic change. The goal is to keep the export logic relatively flat and centralized.
2022-07-11 00:42:58 +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(__floatuntidf, .{ .name = "__floatuntidf", .linkage = common.linkage, .visibility = common.visibility });
compiler_rt: Slightly re-factor exports for Windows x86-64 This is just a cosmetic change. The goal is to keep the export logic relatively flat and centralized.
2022-07-11 00:42:58 +01:00
}
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
}
compiler-rt: fix tests
2022-06-16 23:14:12 +01:00
pub fn __floatuntidf(a: u128) callconv(.C) f64 {
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 intToFloat(f64, a);
}
compiler_rt: Update Windows ABI for float<->int conversion routines Starting with LLVM 14, the Libcalls to these functions are now lowered using a Vec(2, u64) instead of the standard ABI for i128 integers, so our compiler-rt implementation needs to be updated to expose the same ABI on Windows.
2022-07-10 17:53:24 +01:00
compiler_rt: Slightly re-factor exports for Windows x86-64 This is just a cosmetic change. The goal is to keep the export logic relatively flat and centralized.
2022-07-11 00:42:58 +01:00
fn __floatuntidf_windows_x86_64(a: @Vector(2, u64)) callconv(.C) f64 {
compiler_rt: Update Windows ABI for float<->int conversion routines Starting with LLVM 14, the Libcalls to these functions are now lowered using a Vec(2, u64) instead of the standard ABI for i128 integers, so our compiler-rt implementation needs to be updated to expose the same ABI on Windows.
2022-07-10 17:53:24 +01:00
return intToFloat(f64, @bitCast(u128, a));
}
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