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https://git.proxmox.com/git/wasi-libc
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a280fead2a
This is split out from the LTO change. It's needed by the LTO build so that we can easily build these files in non-LTO mode, since they satisfy calls emitted by LLVM codegen after LTO.
35 lines
1.0 KiB
C
35 lines
1.0 KiB
C
// Wasm's `min` and `max` operators implement the IEEE 754-2019
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// `minimum` and `maximum` operations, meaning that given a choice
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// between NaN and a number, they return NaN. This differs from
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// the C standard library's `fmin` and `fmax` functions, which
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// return the number. However, we can still use wasm's builtins
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// by handling the NaN cases explicitly, and it still turns out
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// to be faster than doing the whole operation in
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// target-independent C. And, it's smaller.
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#include <math.h>
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float fminf(float x, float y) {
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if (isnan(x)) return y;
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if (isnan(y)) return x;
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return __builtin_wasm_min_f32(x, y);
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}
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float fmaxf(float x, float y) {
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if (isnan(x)) return y;
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if (isnan(y)) return x;
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return __builtin_wasm_max_f32(x, y);
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}
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double fmin(double x, double y) {
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if (isnan(x)) return y;
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if (isnan(y)) return x;
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return __builtin_wasm_min_f64(x, y);
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}
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double fmax(double x, double y) {
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if (isnan(x)) return y;
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if (isnan(y)) return x;
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return __builtin_wasm_max_f64(x, y);
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}
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