25 lines
623 B
Zig
25 lines
623 B
Zig
const compiler_rt = @import("../compiler_rt.zig");
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const addf3 = @import("./addf3.zig").addf3;
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const symbol = @import("../compiler_rt.zig").symbol;
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comptime {
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if (compiler_rt.want_aeabi) {
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symbol(&__aeabi_dsub, "__aeabi_dsub");
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} else {
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symbol(&__subdf3, "__subdf3");
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}
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}
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fn __subdf3(a: f64, b: f64) callconv(.c) f64 {
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return sub(a, b);
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}
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fn __aeabi_dsub(a: f64, b: f64) callconv(.{ .arm_aapcs = .{} }) f64 {
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return sub(a, b);
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}
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inline fn sub(a: f64, b: f64) f64 {
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const neg_b = @as(f64, @bitCast(@as(u64, @bitCast(b)) ^ (@as(u64, 1) << 63)));
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return addf3(f64, a, neg_b);
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}
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