25 lines
605 B
Zig
25 lines
605 B
Zig
const compiler_rt = @import("../compiler_rt.zig");
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const symbol = compiler_rt.symbol;
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const addf3 = @import("./addf3.zig").addf3;
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comptime {
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if (compiler_rt.want_aeabi) {
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symbol(&__aeabi_fsub, "__aeabi_fsub");
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} else {
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symbol(&__subsf3, "__subsf3");
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}
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}
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fn __subsf3(a: f32, b: f32) callconv(.c) f32 {
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return sub(a, b);
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}
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fn __aeabi_fsub(a: f32, b: f32) callconv(.{ .arm_aapcs = .{} }) f32 {
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return sub(a, b);
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}
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inline fn sub(a: f32, b: f32) f32 {
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const neg_b = @as(f32, @bitCast(@as(u32, @bitCast(b)) ^ (@as(u32, 1) << 31)));
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return addf3(f32, a, neg_b);
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}
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