diff options
Diffstat (limited to 'vendor/compiler_builtins')
38 files changed, 308 insertions, 130 deletions
diff --git a/vendor/compiler_builtins/.cargo-checksum.json b/vendor/compiler_builtins/.cargo-checksum.json index 9324f092f..3310b9b76 100644 --- a/vendor/compiler_builtins/.cargo-checksum.json +++ b/vendor/compiler_builtins/.cargo-checksum.json @@ -1 +1 @@ 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\ No newline at end of file diff --git a/vendor/compiler_builtins/Cargo.lock b/vendor/compiler_builtins/Cargo.lock index e184f7e20..e60762217 100644 --- a/vendor/compiler_builtins/Cargo.lock +++ b/vendor/compiler_builtins/Cargo.lock @@ -4,13 +4,13 @@ version = 3 [[package]] name = "cc" -version = "1.0.70" +version = "1.0.73" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d26a6ce4b6a484fa3edb70f7efa6fc430fd2b87285fe8b84304fd0936faa0dc0" +checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11" [[package]] name = "compiler_builtins" -version = "0.1.73" +version = "0.1.79" dependencies = [ "cc", "rustc-std-workspace-core", diff --git a/vendor/compiler_builtins/Cargo.toml b/vendor/compiler_builtins/Cargo.toml index 765e99f94..eedf9a7b2 100644 --- a/vendor/compiler_builtins/Cargo.toml +++ b/vendor/compiler_builtins/Cargo.toml @@ -11,7 +11,7 @@ [package] name = "compiler_builtins" -version = "0.1.73" +version = "0.1.79" authors = ["Jorge Aparicio <japaricious@gmail.com>"] links = "compiler-rt" include = [ @@ -33,6 +33,7 @@ documentation = "https://docs.rs/compiler_builtins" readme = "README.md" license = "MIT/Apache-2.0" repository = "https://github.com/rust-lang/compiler-builtins" +resolver = "1" [profile.dev] panic = "abort" diff --git a/vendor/compiler_builtins/build.rs b/vendor/compiler_builtins/build.rs index 11deffb9c..73952bb9f 100644 --- a/vendor/compiler_builtins/build.rs +++ b/vendor/compiler_builtins/build.rs @@ -29,6 +29,7 @@ fn main() { || (target.contains("sgx") && target.contains("fortanix")) || target.contains("-none") || target.contains("nvptx") + || target.contains("uefi") { println!("cargo:rustc-cfg=feature=\"mem\""); } @@ -58,9 +59,11 @@ fn main() { // unlikely that the C is really that much better than our own Rust. // * nvptx - everything is bitcode, not compatible with mixed C/Rust // * riscv - the rust-lang/rust distribution container doesn't have a C - // compiler nor is cc-rs ready for compilation to riscv (at this - // time). This can probably be removed in the future - if !target.contains("wasm") && !target.contains("nvptx") && !target.starts_with("riscv") { + // compiler. + if !target.contains("wasm") + && !target.contains("nvptx") + && (!target.starts_with("riscv") || target.contains("xous")) + { #[cfg(feature = "c")] c::compile(&llvm_target, &target); } @@ -457,6 +460,7 @@ mod c { ("__fe_getround", "fp_mode.c"), ("__divtf3", "divtf3.c"), ("__trunctfdf2", "trunctfdf2.c"), + ("__trunctfsf2", "trunctfsf2.c"), ]); } diff --git a/vendor/compiler_builtins/libm/src/math/acosh.rs b/vendor/compiler_builtins/libm/src/math/acosh.rs index ac7a5f1c6..d1f5b9fa9 100644 --- a/vendor/compiler_builtins/libm/src/math/acosh.rs +++ b/vendor/compiler_builtins/libm/src/math/acosh.rs @@ -7,6 +7,7 @@ const LN2: f64 = 0.693147180559945309417232121458176568; /* 0x3fe62e42, 0xfefa3 /// Calculates the inverse hyperbolic cosine of `x`. /// Is defined as `log(x + sqrt(x*x-1))`. /// `x` must be a number greater than or equal to 1. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn acosh(x: f64) -> f64 { let u = x.to_bits(); let e = ((u >> 52) as usize) & 0x7ff; diff --git a/vendor/compiler_builtins/libm/src/math/acoshf.rs b/vendor/compiler_builtins/libm/src/math/acoshf.rs index 0879e1edb..ad3455fdd 100644 --- a/vendor/compiler_builtins/libm/src/math/acoshf.rs +++ b/vendor/compiler_builtins/libm/src/math/acoshf.rs @@ -7,6 +7,7 @@ const LN2: f32 = 0.693147180559945309417232121458176568; /// Calculates the inverse hyperbolic cosine of `x`. /// Is defined as `log(x + sqrt(x*x-1))`. /// `x` must be a number greater than or equal to 1. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn acoshf(x: f32) -> f32 { let u = x.to_bits(); let a = u & 0x7fffffff; diff --git a/vendor/compiler_builtins/libm/src/math/asinh.rs b/vendor/compiler_builtins/libm/src/math/asinh.rs index 14295357a..0abd80c2f 100644 --- a/vendor/compiler_builtins/libm/src/math/asinh.rs +++ b/vendor/compiler_builtins/libm/src/math/asinh.rs @@ -7,6 +7,7 @@ const LN2: f64 = 0.693147180559945309417232121458176568; /* 0x3fe62e42, 0xfefa3 /// /// Calculates the inverse hyperbolic sine of `x`. /// Is defined as `sgn(x)*log(|x|+sqrt(x*x+1))`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn asinh(mut x: f64) -> f64 { let mut u = x.to_bits(); let e = ((u >> 52) as usize) & 0x7ff; diff --git a/vendor/compiler_builtins/libm/src/math/asinhf.rs b/vendor/compiler_builtins/libm/src/math/asinhf.rs index e22a29132..09c77823e 100644 --- a/vendor/compiler_builtins/libm/src/math/asinhf.rs +++ b/vendor/compiler_builtins/libm/src/math/asinhf.rs @@ -7,6 +7,7 @@ const LN2: f32 = 0.693147180559945309417232121458176568; /// /// Calculates the inverse hyperbolic sine of `x`. /// Is defined as `sgn(x)*log(|x|+sqrt(x*x+1))`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn asinhf(mut x: f32) -> f32 { let u = x.to_bits(); let i = u & 0x7fffffff; diff --git a/vendor/compiler_builtins/libm/src/math/atanh.rs b/vendor/compiler_builtins/libm/src/math/atanh.rs index 79a989c42..b984c4ac6 100644 --- a/vendor/compiler_builtins/libm/src/math/atanh.rs +++ b/vendor/compiler_builtins/libm/src/math/atanh.rs @@ -5,6 +5,7 @@ use super::log1p; /// /// Calculates the inverse hyperbolic tangent of `x`. /// Is defined as `log((1+x)/(1-x))/2 = log1p(2x/(1-x))/2`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn atanh(x: f64) -> f64 { let u = x.to_bits(); let e = ((u >> 52) as usize) & 0x7ff; diff --git a/vendor/compiler_builtins/libm/src/math/atanhf.rs b/vendor/compiler_builtins/libm/src/math/atanhf.rs index 7b2f34d97..a1aa314a5 100644 --- a/vendor/compiler_builtins/libm/src/math/atanhf.rs +++ b/vendor/compiler_builtins/libm/src/math/atanhf.rs @@ -5,6 +5,7 @@ use super::log1pf; /// /// Calculates the inverse hyperbolic tangent of `x`. /// Is defined as `log((1+x)/(1-x))/2 = log1p(2x/(1-x))/2`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn atanhf(mut x: f32) -> f32 { let mut u = x.to_bits(); let sign = (u >> 31) != 0; diff --git a/vendor/compiler_builtins/libm/src/math/copysign.rs b/vendor/compiler_builtins/libm/src/math/copysign.rs index 1527fb6ea..1f4a35a33 100644 --- a/vendor/compiler_builtins/libm/src/math/copysign.rs +++ b/vendor/compiler_builtins/libm/src/math/copysign.rs @@ -2,6 +2,7 @@ /// /// Constructs a number with the magnitude (absolute value) of its /// first argument, `x`, and the sign of its second argument, `y`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn copysign(x: f64, y: f64) -> f64 { let mut ux = x.to_bits(); let uy = y.to_bits(); diff --git a/vendor/compiler_builtins/libm/src/math/copysignf.rs b/vendor/compiler_builtins/libm/src/math/copysignf.rs index 35148561a..6c346e3a5 100644 --- a/vendor/compiler_builtins/libm/src/math/copysignf.rs +++ b/vendor/compiler_builtins/libm/src/math/copysignf.rs @@ -2,6 +2,7 @@ /// /// Constructs a number with the magnitude (absolute value) of its /// first argument, `x`, and the sign of its second argument, `y`. +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn copysignf(x: f32, y: f32) -> f32 { let mut ux = x.to_bits(); let uy = y.to_bits(); diff --git a/vendor/compiler_builtins/libm/src/math/erf.rs b/vendor/compiler_builtins/libm/src/math/erf.rs index a2c617d34..5e21ba578 100644 --- a/vendor/compiler_builtins/libm/src/math/erf.rs +++ b/vendor/compiler_builtins/libm/src/math/erf.rs @@ -219,6 +219,7 @@ fn erfc2(ix: u32, mut x: f64) -> f64 { /// Calculates an approximation to the “error function”, which estimates /// the probability that an observation will fall within x standard /// deviations of the mean (assuming a normal distribution). +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn erf(x: f64) -> f64 { let r: f64; let s: f64; diff --git a/vendor/compiler_builtins/libm/src/math/erff.rs b/vendor/compiler_builtins/libm/src/math/erff.rs index 384052293..f74d4b632 100644 --- a/vendor/compiler_builtins/libm/src/math/erff.rs +++ b/vendor/compiler_builtins/libm/src/math/erff.rs @@ -130,6 +130,7 @@ fn erfc2(mut ix: u32, mut x: f32) -> f32 { /// Calculates an approximation to the “error function”, which estimates /// the probability that an observation will fall within x standard /// deviations of the mean (assuming a normal distribution). +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn erff(x: f32) -> f32 { let r: f32; let s: f32; diff --git a/vendor/compiler_builtins/libm/src/math/exp10.rs b/vendor/compiler_builtins/libm/src/math/exp10.rs index 9537f76f1..559930e10 100644 --- a/vendor/compiler_builtins/libm/src/math/exp10.rs +++ b/vendor/compiler_builtins/libm/src/math/exp10.rs @@ -6,16 +6,17 @@ const P10: &[f64] = &[ 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15, ]; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn exp10(x: f64) -> f64 { let (mut y, n) = modf(x); let u: u64 = n.to_bits(); /* fabs(n) < 16 without raising invalid on nan */ if (u >> 52 & 0x7ff) < 0x3ff + 4 { if y == 0.0 { - return P10[((n as isize) + 15) as usize]; + return i!(P10, ((n as isize) + 15) as usize); } y = exp2(LN10 * y); - return y * P10[((n as isize) + 15) as usize]; + return y * i!(P10, ((n as isize) + 15) as usize); } return pow(10.0, x); } diff --git a/vendor/compiler_builtins/libm/src/math/exp10f.rs b/vendor/compiler_builtins/libm/src/math/exp10f.rs index d45fff36e..1279bc6c5 100644 --- a/vendor/compiler_builtins/libm/src/math/exp10f.rs +++ b/vendor/compiler_builtins/libm/src/math/exp10f.rs @@ -6,16 +6,17 @@ const P10: &[f32] = &[ 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1, 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, ]; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn exp10f(x: f32) -> f32 { let (mut y, n) = modff(x); let u = n.to_bits(); /* fabsf(n) < 8 without raising invalid on nan */ if (u >> 23 & 0xff) < 0x7f + 3 { if y == 0.0 { - return P10[((n as isize) + 7) as usize]; + return i!(P10, ((n as isize) + 7) as usize); } y = exp2f(LN10_F32 * y); - return y * P10[((n as isize) + 7) as usize]; + return y * i!(P10, ((n as isize) + 7) as usize); } return exp2(LN10_F64 * (x as f64)) as f32; } diff --git a/vendor/compiler_builtins/libm/src/math/fenv.rs b/vendor/compiler_builtins/libm/src/math/fenv.rs index 652e60324..c91272e82 100644 --- a/vendor/compiler_builtins/libm/src/math/fenv.rs +++ b/vendor/compiler_builtins/libm/src/math/fenv.rs @@ -5,7 +5,6 @@ pub(crate) const FE_UNDERFLOW: i32 = 0; pub(crate) const FE_INEXACT: i32 = 0; pub(crate) const FE_TONEAREST: i32 = 0; -pub(crate) const FE_TOWARDZERO: i32 = 0; #[inline] pub(crate) fn feclearexcept(_mask: i32) -> i32 { @@ -26,8 +25,3 @@ pub(crate) fn fetestexcept(_mask: i32) -> i32 { pub(crate) fn fegetround() -> i32 { FE_TONEAREST } - -#[inline] -pub(crate) fn fesetround(_r: i32) -> i32 { - 0 -} diff --git a/vendor/compiler_builtins/libm/src/math/fmaf.rs b/vendor/compiler_builtins/libm/src/math/fmaf.rs index 03d371c55..2848f2aee 100644 --- a/vendor/compiler_builtins/libm/src/math/fmaf.rs +++ b/vendor/compiler_builtins/libm/src/math/fmaf.rs @@ -29,8 +29,7 @@ use core::f32; use core::ptr::read_volatile; use super::fenv::{ - feclearexcept, fegetround, feraiseexcept, fesetround, fetestexcept, FE_INEXACT, FE_TONEAREST, - FE_TOWARDZERO, FE_UNDERFLOW, + feclearexcept, fegetround, feraiseexcept, fetestexcept, FE_INEXACT, FE_TONEAREST, FE_UNDERFLOW, }; /* @@ -91,16 +90,28 @@ pub fn fmaf(x: f32, y: f32, mut z: f32) -> f32 { * If result is inexact, and exactly halfway between two float values, * we need to adjust the low-order bit in the direction of the error. */ - fesetround(FE_TOWARDZERO); - // prevent `vxy + z` from being CSE'd with `xy + z` above - let vxy: f64 = unsafe { read_volatile(&xy) }; - let mut adjusted_result: f64 = vxy + z as f64; - fesetround(FE_TONEAREST); - if result == adjusted_result { - ui = adjusted_result.to_bits(); + let neg = ui >> 63 != 0; + let err = if neg == (z as f64 > xy) { + xy - result + z as f64 + } else { + z as f64 - result + xy + }; + if neg == (err < 0.0) { ui += 1; - adjusted_result = f64::from_bits(ui); + } else { + ui -= 1; + } + f64::from_bits(ui) as f32 +} + +#[cfg(test)] +mod tests { + #[test] + fn issue_263() { + let a = f32::from_bits(1266679807); + let b = f32::from_bits(1300234242); + let c = f32::from_bits(1115553792); + let expected = f32::from_bits(1501560833); + assert_eq!(super::fmaf(a, b, c), expected); } - z = adjusted_result as f32; - z } diff --git a/vendor/compiler_builtins/libm/src/math/ilogb.rs b/vendor/compiler_builtins/libm/src/math/ilogb.rs index 0a380b7ef..7d74dcfb6 100644 --- a/vendor/compiler_builtins/libm/src/math/ilogb.rs +++ b/vendor/compiler_builtins/libm/src/math/ilogb.rs @@ -1,6 +1,7 @@ const FP_ILOGBNAN: i32 = -1 - 0x7fffffff; const FP_ILOGB0: i32 = FP_ILOGBNAN; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn ilogb(x: f64) -> i32 { let mut i: u64 = x.to_bits(); let e = ((i >> 52) & 0x7ff) as i32; diff --git a/vendor/compiler_builtins/libm/src/math/ilogbf.rs b/vendor/compiler_builtins/libm/src/math/ilogbf.rs index b384fa4b2..0fa58748c 100644 --- a/vendor/compiler_builtins/libm/src/math/ilogbf.rs +++ b/vendor/compiler_builtins/libm/src/math/ilogbf.rs @@ -1,6 +1,7 @@ const FP_ILOGBNAN: i32 = -1 - 0x7fffffff; const FP_ILOGB0: i32 = FP_ILOGBNAN; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn ilogbf(x: f32) -> i32 { let mut i = x.to_bits(); let e = ((i >> 23) & 0xff) as i32; diff --git a/vendor/compiler_builtins/libm/src/math/lgamma.rs b/vendor/compiler_builtins/libm/src/math/lgamma.rs index 5bc87e85e..a08bc5b64 100644 --- a/vendor/compiler_builtins/libm/src/math/lgamma.rs +++ b/vendor/compiler_builtins/libm/src/math/lgamma.rs @@ -1,5 +1,6 @@ use super::lgamma_r; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn lgamma(x: f64) -> f64 { lgamma_r(x).0 } diff --git a/vendor/compiler_builtins/libm/src/math/lgamma_r.rs b/vendor/compiler_builtins/libm/src/math/lgamma_r.rs index 9533e882c..b26177e6e 100644 --- a/vendor/compiler_builtins/libm/src/math/lgamma_r.rs +++ b/vendor/compiler_builtins/libm/src/math/lgamma_r.rs @@ -152,7 +152,7 @@ fn sin_pi(mut x: f64) -> f64 { x = 2.0 * (x * 0.5 - floor(x * 0.5)); /* x mod 2.0 */ n = (x * 4.0) as i32; - n = (n + 1) / 2; + n = div!(n + 1, 2); x -= (n as f64) * 0.5; x *= PI; @@ -164,6 +164,7 @@ fn sin_pi(mut x: f64) -> f64 { } } +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn lgamma_r(mut x: f64) -> (f64, i32) { let u: u64 = x.to_bits(); let mut t: f64; diff --git a/vendor/compiler_builtins/libm/src/math/lgammaf.rs b/vendor/compiler_builtins/libm/src/math/lgammaf.rs index dfdc87f96..a9c2da75b 100644 --- a/vendor/compiler_builtins/libm/src/math/lgammaf.rs +++ b/vendor/compiler_builtins/libm/src/math/lgammaf.rs @@ -1,5 +1,6 @@ use super::lgammaf_r; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn lgammaf(x: f32) -> f32 { lgammaf_r(x).0 } diff --git a/vendor/compiler_builtins/libm/src/math/lgammaf_r.rs b/vendor/compiler_builtins/libm/src/math/lgammaf_r.rs index c5e559f46..723c90daf 100644 --- a/vendor/compiler_builtins/libm/src/math/lgammaf_r.rs +++ b/vendor/compiler_builtins/libm/src/math/lgammaf_r.rs @@ -88,7 +88,7 @@ fn sin_pi(mut x: f32) -> f32 { x = 2.0 * (x * 0.5 - floorf(x * 0.5)); /* x mod 2.0 */ n = (x * 4.0) as isize; - n = (n + 1) / 2; + n = div!(n + 1, 2); y = (x as f64) - (n as f64) * 0.5; y *= 3.14159265358979323846; match n { @@ -99,6 +99,7 @@ fn sin_pi(mut x: f32) -> f32 { } } +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn lgammaf_r(mut x: f32) -> (f32, i32) { let u = x.to_bits(); let mut t: f32; diff --git a/vendor/compiler_builtins/libm/src/math/rem_pio2_large.rs b/vendor/compiler_builtins/libm/src/math/rem_pio2_large.rs index 65473f0ab..db97a39d4 100644 --- a/vendor/compiler_builtins/libm/src/math/rem_pio2_large.rs +++ b/vendor/compiler_builtins/libm/src/math/rem_pio2_large.rs @@ -27,7 +27,7 @@ const INIT_JK: [usize; 4] = [3, 4, 4, 6]; // // NB: This table must have at least (e0-3)/24 + jk terms. // For quad precision (e0 <= 16360, jk = 6), this is 686. -#[cfg(target_pointer_width = "32")] +#[cfg(any(target_pointer_width = "32", target_pointer_width = "16"))] const IPIO2: [i32; 66] = [ 0xA2F983, 0x6E4E44, 0x1529FC, 0x2757D1, 0xF534DD, 0xC0DB62, 0x95993C, 0x439041, 0xFE5163, 0xABDEBB, 0xC561B7, 0x246E3A, 0x424DD2, 0xE00649, 0x2EEA09, 0xD1921C, 0xFE1DEB, 0x1CB129, diff --git a/vendor/compiler_builtins/libm/src/math/sincos.rs b/vendor/compiler_builtins/libm/src/math/sincos.rs index 4ab588412..ff5d87a1c 100644 --- a/vendor/compiler_builtins/libm/src/math/sincos.rs +++ b/vendor/compiler_builtins/libm/src/math/sincos.rs @@ -12,6 +12,7 @@ use super::{get_high_word, k_cos, k_sin, rem_pio2}; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn sincos(x: f64) -> (f64, f64) { let s: f64; let c: f64; diff --git a/vendor/compiler_builtins/libm/src/math/sincosf.rs b/vendor/compiler_builtins/libm/src/math/sincosf.rs index 5304e8ca0..9a4c36104 100644 --- a/vendor/compiler_builtins/libm/src/math/sincosf.rs +++ b/vendor/compiler_builtins/libm/src/math/sincosf.rs @@ -23,6 +23,7 @@ const S2PIO2: f32 = 2.0 * PI_2; /* 0x400921FB, 0x54442D18 */ const S3PIO2: f32 = 3.0 * PI_2; /* 0x4012D97C, 0x7F3321D2 */ const S4PIO2: f32 = 4.0 * PI_2; /* 0x401921FB, 0x54442D18 */ +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn sincosf(x: f32) -> (f32, f32) { let s: f32; let c: f32; diff --git a/vendor/compiler_builtins/libm/src/math/tgamma.rs b/vendor/compiler_builtins/libm/src/math/tgamma.rs index f8ccf669a..e64eff61f 100644 --- a/vendor/compiler_builtins/libm/src/math/tgamma.rs +++ b/vendor/compiler_builtins/libm/src/math/tgamma.rs @@ -38,7 +38,7 @@ fn sinpi(mut x: f64) -> f64 { /* reduce x into [-.25,.25] */ n = (4.0 * x) as isize; - n = (n + 1) / 2; + n = div!(n + 1, 2); x -= (n as f64) * 0.5; x *= PI; @@ -118,18 +118,19 @@ fn s(x: f64) -> f64 { /* to avoid overflow handle large x differently */ if x < 8.0 { for i in (0..=N).rev() { - num = num * x + SNUM[i]; - den = den * x + SDEN[i]; + num = num * x + i!(SNUM, i); + den = den * x + i!(SDEN, i); } } else { for i in 0..=N { - num = num / x + SNUM[i]; - den = den / x + SDEN[i]; + num = num / x + i!(SNUM, i); + den = den / x + i!(SDEN, i); } } return num / den; } +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn tgamma(mut x: f64) -> f64 { let u: u64 = x.to_bits(); let absx: f64; @@ -157,7 +158,7 @@ pub fn tgamma(mut x: f64) -> f64 { return 0.0 / 0.0; } if x <= FACT.len() as f64 { - return FACT[(x as usize) - 1]; + return i!(FACT, (x as usize) - 1); } } diff --git a/vendor/compiler_builtins/libm/src/math/tgammaf.rs b/vendor/compiler_builtins/libm/src/math/tgammaf.rs index a8f161f0c..23e3814f9 100644 --- a/vendor/compiler_builtins/libm/src/math/tgammaf.rs +++ b/vendor/compiler_builtins/libm/src/math/tgammaf.rs @@ -1,5 +1,6 @@ use super::tgamma; +#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] pub fn tgammaf(x: f32) -> f32 { tgamma(x as f64) as f32 } diff --git a/vendor/compiler_builtins/src/arm.rs b/vendor/compiler_builtins/src/arm.rs index 9c1b6ad12..e517a9ef3 100644 --- a/vendor/compiler_builtins/src/arm.rs +++ b/vendor/compiler_builtins/src/arm.rs @@ -22,6 +22,7 @@ intrinsics! { // custom calling convention which can't be implemented using a normal Rust function. #[naked] #[cfg(not(target_env = "msvc"))] + #[cfg_attr(all(not(windows), not(target_vendor="apple")), linkage = "weak")] pub unsafe extern "C" fn __aeabi_uidivmod() { core::arch::asm!( "push {{lr}}", @@ -36,6 +37,7 @@ intrinsics! { } #[naked] + #[cfg_attr(all(not(windows), not(target_vendor="apple")), linkage = "weak")] pub unsafe extern "C" fn __aeabi_uldivmod() { core::arch::asm!( "push {{r4, lr}}", @@ -52,6 +54,7 @@ intrinsics! { } #[naked] + #[cfg_attr(all(not(windows), not(target_vendor="apple")), linkage = "weak")] pub unsafe extern "C" fn __aeabi_idivmod() { core::arch::asm!( "push {{r0, r1, r4, lr}}", @@ -65,6 +68,7 @@ intrinsics! { } #[naked] + #[cfg_attr(all(not(windows), not(target_vendor="apple")), linkage = "weak")] pub unsafe extern "C" fn __aeabi_ldivmod() { core::arch::asm!( "push {{r4, lr}}", diff --git a/vendor/compiler_builtins/src/arm_linux.rs b/vendor/compiler_builtins/src/arm_linux.rs index 8fe09485b..8f22eb628 100644 --- a/vendor/compiler_builtins/src/arm_linux.rs +++ b/vendor/compiler_builtins/src/arm_linux.rs @@ -55,7 +55,7 @@ fn insert_aligned(aligned: u32, val: u32, shift: u32, mask: u32) -> u32 { } // Generic atomic read-modify-write operation -unsafe fn atomic_rmw<T, F: Fn(u32) -> u32>(ptr: *mut T, f: F) -> u32 { +unsafe fn atomic_rmw<T, F: Fn(u32) -> u32, G: Fn(u32, u32) -> u32>(ptr: *mut T, f: F, g: G) -> u32 { let aligned_ptr = align_ptr(ptr); let (shift, mask) = get_shift_mask(ptr); @@ -65,7 +65,7 @@ unsafe fn atomic_rmw<T, F: Fn(u32) -> u32>(ptr: *mut T, f: F) -> u32 { let newval = f(curval); let newval_aligned = insert_aligned(curval_aligned, newval, shift, mask); if __kuser_cmpxchg(curval_aligned, newval_aligned, aligned_ptr) { - return curval; + return g(curval, newval); } } } @@ -89,13 +89,21 @@ unsafe fn atomic_cmpxchg<T>(ptr: *mut T, oldval: u32, newval: u32) -> u32 { } macro_rules! atomic_rmw { - ($name:ident, $ty:ty, $op:expr) => { + ($name:ident, $ty:ty, $op:expr, $fetch:expr) => { intrinsics! { pub unsafe extern "C" fn $name(ptr: *mut $ty, val: $ty) -> $ty { - atomic_rmw(ptr, |x| $op(x as $ty, val) as u32) as $ty + atomic_rmw(ptr, |x| $op(x as $ty, val) as u32, |old, new| $fetch(old, new)) as $ty } } }; + + (@old $name:ident, $ty:ty, $op:expr) => { + atomic_rmw!($name, $ty, $op, |old, _| old); + }; + + (@new $name:ident, $ty:ty, $op:expr) => { + atomic_rmw!($name, $ty, $op, |_, new| new); + }; } macro_rules! atomic_cmpxchg { ($name:ident, $ty:ty) => { @@ -107,101 +115,129 @@ macro_rules! atomic_cmpxchg { }; } -atomic_rmw!(__sync_fetch_and_add_1, u8, |a: u8, b: u8| a.wrapping_add(b)); -atomic_rmw!(__sync_fetch_and_add_2, u16, |a: u16, b: u16| a +atomic_rmw!(@old __sync_fetch_and_add_1, u8, |a: u8, b: u8| a.wrapping_add(b)); +atomic_rmw!(@old __sync_fetch_and_add_2, u16, |a: u16, b: u16| a + .wrapping_add(b)); +atomic_rmw!(@old __sync_fetch_and_add_4, u32, |a: u32, b: u32| a + .wrapping_add(b)); + +atomic_rmw!(@new __sync_add_and_fetch_1, u8, |a: u8, b: u8| a.wrapping_add(b)); +atomic_rmw!(@new __sync_add_and_fetch_2, u16, |a: u16, b: u16| a .wrapping_add(b)); -atomic_rmw!(__sync_fetch_and_add_4, u32, |a: u32, b: u32| a +atomic_rmw!(@new __sync_add_and_fetch_4, u32, |a: u32, b: u32| a .wrapping_add(b)); -atomic_rmw!(__sync_fetch_and_sub_1, u8, |a: u8, b: u8| a.wrapping_sub(b)); -atomic_rmw!(__sync_fetch_and_sub_2, u16, |a: u16, b: u16| a +atomic_rmw!(@old __sync_fetch_and_sub_1, u8, |a: u8, b: u8| a.wrapping_sub(b)); +atomic_rmw!(@old __sync_fetch_and_sub_2, u16, |a: u16, b: u16| a .wrapping_sub(b)); -atomic_rmw!(__sync_fetch_and_sub_4, u32, |a: u32, b: u32| a +atomic_rmw!(@old __sync_fetch_and_sub_4, u32, |a: u32, b: u32| a .wrapping_sub(b)); -atomic_rmw!(__sync_fetch_and_and_1, u8, |a: u8, b: u8| a & b); -atomic_rmw!(__sync_fetch_and_and_2, u16, |a: u16, b: u16| a & b); -atomic_rmw!(__sync_fetch_and_and_4, u32, |a: u32, b: u32| a & b); +atomic_rmw!(@new __sync_sub_and_fetch_1, u8, |a: u8, b: u8| a.wrapping_sub(b)); +atomic_rmw!(@new __sync_sub_and_fetch_2, u16, |a: u16, b: u16| a + .wrapping_sub(b)); +atomic_rmw!(@new __sync_sub_and_fetch_4, u32, |a: u32, b: u32| a + .wrapping_sub(b)); + +atomic_rmw!(@old __sync_fetch_and_and_1, u8, |a: u8, b: u8| a & b); +atomic_rmw!(@old __sync_fetch_and_and_2, u16, |a: u16, b: u16| a & b); +atomic_rmw!(@old __sync_fetch_and_and_4, u32, |a: u32, b: u32| a & b); + +atomic_rmw!(@new __sync_and_and_fetch_1, u8, |a: u8, b: u8| a & b); +atomic_rmw!(@new __sync_and_and_fetch_2, u16, |a: u16, b: u16| a & b); +atomic_rmw!(@new __sync_and_and_fetch_4, u32, |a: u32, b: u32| a & b); + +atomic_rmw!(@old __sync_fetch_and_or_1, u8, |a: u8, b: u8| a | b); +atomic_rmw!(@old __sync_fetch_and_or_2, u16, |a: u16, b: u16| a | b); +atomic_rmw!(@old __sync_fetch_and_or_4, u32, |a: u32, b: u32| a | b); + +atomic_rmw!(@new __sync_or_and_fetch_1, u8, |a: u8, b: u8| a | b); +atomic_rmw!(@new __sync_or_and_fetch_2, u16, |a: u16, b: u16| a | b); +atomic_rmw!(@new __sync_or_and_fetch_4, u32, |a: u32, b: u32| a | b); + +atomic_rmw!(@old __sync_fetch_and_xor_1, u8, |a: u8, b: u8| a ^ b); +atomic_rmw!(@old __sync_fetch_and_xor_2, u16, |a: u16, b: u16| a ^ b); +atomic_rmw!(@old __sync_fetch_and_xor_4, u32, |a: u32, b: u32| a ^ b); -atomic_rmw!(__sync_fetch_and_or_1, u8, |a: u8, b: u8| a | b); -atomic_rmw!(__sync_fetch_and_or_2, u16, |a: u16, b: u16| a | b); -atomic_rmw!(__sync_fetch_and_or_4, u32, |a: u32, b: u32| a | b); +atomic_rmw!(@new __sync_xor_and_fetch_1, u8, |a: u8, b: u8| a ^ b); +atomic_rmw!(@new __sync_xor_and_fetch_2, u16, |a: u16, b: u16| a ^ b); +atomic_rmw!(@new __sync_xor_and_fetch_4, u32, |a: u32, b: u32| a ^ b); -atomic_rmw!(__sync_fetch_and_xor_1, u8, |a: u8, b: u8| a ^ b); -atomic_rmw!(__sync_fetch_and_xor_2, u16, |a: u16, b: u16| a ^ b); -atomic_rmw!(__sync_fetch_and_xor_4, u32, |a: u32, b: u32| a ^ b); +atomic_rmw!(@old __sync_fetch_and_nand_1, u8, |a: u8, b: u8| !(a & b)); +atomic_rmw!(@old __sync_fetch_and_nand_2, u16, |a: u16, b: u16| !(a & b)); +atomic_rmw!(@old __sync_fetch_and_nand_4, u32, |a: u32, b: u32| !(a & b)); -atomic_rmw!(__sync_fetch_and_nand_1, u8, |a: u8, b: u8| !(a & b)); -atomic_rmw!(__sync_fetch_and_nand_2, u16, |a: u16, b: u16| !(a & b)); -atomic_rmw!(__sync_fetch_and_nand_4, u32, |a: u32, b: u32| !(a & b)); +atomic_rmw!(@new __sync_nand_and_fetch_1, u8, |a: u8, b: u8| !(a & b)); +atomic_rmw!(@new __sync_nand_and_fetch_2, u16, |a: u16, b: u16| !(a & b)); +atomic_rmw!(@new __sync_nand_and_fetch_4, u32, |a: u32, b: u32| !(a & b)); -atomic_rmw!(__sync_fetch_and_max_1, i8, |a: i8, b: i8| if a > b { +atomic_rmw!(@old __sync_fetch_and_max_1, i8, |a: i8, b: i8| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_max_2, i16, |a: i16, b: i16| if a > b { +atomic_rmw!(@old __sync_fetch_and_max_2, i16, |a: i16, b: i16| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_max_4, i32, |a: i32, b: i32| if a > b { +atomic_rmw!(@old __sync_fetch_and_max_4, i32, |a: i32, b: i32| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umax_1, u8, |a: u8, b: u8| if a > b { +atomic_rmw!(@old __sync_fetch_and_umax_1, u8, |a: u8, b: u8| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umax_2, u16, |a: u16, b: u16| if a > b { +atomic_rmw!(@old __sync_fetch_and_umax_2, u16, |a: u16, b: u16| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umax_4, u32, |a: u32, b: u32| if a > b { +atomic_rmw!(@old __sync_fetch_and_umax_4, u32, |a: u32, b: u32| if a > b { a } else { b }); -atomic_rmw!(__sync_fetch_and_min_1, i8, |a: i8, b: i8| if a < b { +atomic_rmw!(@old __sync_fetch_and_min_1, i8, |a: i8, b: i8| if a < b { a } else { b }); -atomic_rmw!(__sync_fetch_and_min_2, i16, |a: i16, b: i16| if a < b { +atomic_rmw!(@old __sync_fetch_and_min_2, i16, |a: i16, b: i16| if a < b { a } else { b }); -atomic_rmw!(__sync_fetch_and_min_4, i32, |a: i32, b: i32| if a < b { +atomic_rmw!(@old __sync_fetch_and_min_4, i32, |a: i32, b: i32| if a < b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umin_1, u8, |a: u8, b: u8| if a < b { +atomic_rmw!(@old __sync_fetch_and_umin_1, u8, |a: u8, b: u8| if a < b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umin_2, u16, |a: u16, b: u16| if a < b { +atomic_rmw!(@old __sync_fetch_and_umin_2, u16, |a: u16, b: u16| if a < b { a } else { b }); -atomic_rmw!(__sync_fetch_and_umin_4, u32, |a: u32, b: u32| if a < b { +atomic_rmw!(@old __sync_fetch_and_umin_4, u32, |a: u32, b: u32| if a < b { a } else { b }); -atomic_rmw!(__sync_lock_test_and_set_1, u8, |_: u8, b: u8| b); -atomic_rmw!(__sync_lock_test_and_set_2, u16, |_: u16, b: u16| b); -atomic_rmw!(__sync_lock_test_and_set_4, u32, |_: u32, b: u32| b); +atomic_rmw!(@old __sync_lock_test_and_set_1, u8, |_: u8, b: u8| b); +atomic_rmw!(@old __sync_lock_test_and_set_2, u16, |_: u16, b: u16| b); +atomic_rmw!(@old __sync_lock_test_and_set_4, u32, |_: u32, b: u32| b); atomic_cmpxchg!(__sync_val_compare_and_swap_1, u8); atomic_cmpxchg!(__sync_val_compare_and_swap_2, u16); diff --git a/vendor/compiler_builtins/src/float/conv.rs b/vendor/compiler_builtins/src/float/conv.rs index 07b58f3d2..68ba63408 100644 --- a/vendor/compiler_builtins/src/float/conv.rs +++ b/vendor/compiler_builtins/src/float/conv.rs @@ -92,12 +92,12 @@ intrinsics! { f64::from_bits(int_to_float::u64_to_f64_bits(i)) } - #[cfg_attr(not(target_feature = "llvm14-builtins-abi"), unadjusted_on_win64)] + #[cfg_attr(any(not(target_feature = "llvm14-builtins-abi"), target_os = "uefi"), unadjusted_on_win64)] pub extern "C" fn __floatuntisf(i: u128) -> f32 { f32::from_bits(int_to_float::u128_to_f32_bits(i)) } - #[cfg_attr(not(target_feature = "llvm14-builtins-abi"), unadjusted_on_win64)] + #[cfg_attr(any(not(target_feature = "llvm14-builtins-abi"), target_os = "uefi"), unadjusted_on_win64)] pub extern "C" fn __floatuntidf(i: u128) -> f64 { f64::from_bits(int_to_float::u128_to_f64_bits(i)) } @@ -129,13 +129,13 @@ intrinsics! { f64::from_bits(int_to_float::u64_to_f64_bits(i.unsigned_abs()) | sign_bit) } - #[cfg_attr(not(target_feature = "llvm14-builtins-abi"), unadjusted_on_win64)] + #[cfg_attr(any(not(target_feature = "llvm14-builtins-abi"), target_os = "uefi"), unadjusted_on_win64)] pub extern "C" fn __floattisf(i: i128) -> f32 { let sign_bit = ((i >> 127) as u32) << 31; f32::from_bits(int_to_float::u128_to_f32_bits(i.unsigned_abs()) | sign_bit) } - #[cfg_attr(not(target_feature = "llvm14-builtins-abi"), unadjusted_on_win64)] + #[cfg_attr(any(not(target_feature = "llvm14-builtins-abi"), target_os = "uefi"), unadjusted_on_win64)] pub extern "C" fn __floattidf(i: i128) -> f64 { let sign_bit = ((i >> 127) as u64) << 63; f64::from_bits(int_to_float::u128_to_f64_bits(i.unsigned_abs()) | sign_bit) diff --git a/vendor/compiler_builtins/src/lib.rs b/vendor/compiler_builtins/src/lib.rs index 009923d27..e7bc61e4c 100644 --- a/vendor/compiler_builtins/src/lib.rs +++ b/vendor/compiler_builtins/src/lib.rs @@ -6,6 +6,7 @@ #![feature(compiler_builtins)] #![feature(core_ffi_c)] #![feature(core_intrinsics)] +#![feature(inline_const)] #![feature(lang_items)] #![feature(linkage)] #![feature(naked_functions)] @@ -45,6 +46,7 @@ pub mod int; all(target_family = "wasm", target_os = "unknown"), all(target_arch = "x86_64", target_os = "uefi"), all(target_arch = "arm", target_os = "none"), + target_os = "xous", all(target_vendor = "fortanix", target_env = "sgx") ))] pub mod math; diff --git a/vendor/compiler_builtins/src/macros.rs b/vendor/compiler_builtins/src/macros.rs index 518a18d4d..7d90b7aad 100644 --- a/vendor/compiler_builtins/src/macros.rs +++ b/vendor/compiler_builtins/src/macros.rs @@ -174,7 +174,7 @@ macro_rules! intrinsics { $($rest:tt)* ) => ( - #[cfg(all(windows, target_pointer_width = "64"))] + #[cfg(all(any(windows, all(target_os = "uefi", target_arch = "x86_64")), target_pointer_width = "64"))] intrinsics! { $(#[$($attr)*])* pub extern "unadjusted" fn $name( $($argname: $ty),* ) $(-> $ret)? { @@ -182,7 +182,7 @@ macro_rules! intrinsics { } } - #[cfg(not(all(windows, target_pointer_width = "64")))] + #[cfg(not(all(any(windows, all(target_os = "uefi", target_arch = "x86_64")), target_pointer_width = "64")))] intrinsics! { $(#[$($attr)*])* pub extern $abi fn $name( $($argname: $ty),* ) $(-> $ret)? { @@ -209,13 +209,13 @@ macro_rules! intrinsics { $($rest:tt)* ) => ( - #[cfg(all(windows, target_arch = "x86_64"))] + #[cfg(all(any(windows, target_os = "uefi"), target_arch = "x86_64"))] $(#[$($attr)*])* pub extern $abi fn $name( $($argname: $ty),* ) $(-> $ret)? { $($body)* } - #[cfg(all(windows, target_arch = "x86_64"))] + #[cfg(all(any(windows, target_os = "uefi"), target_arch = "x86_64"))] pub mod $name { #[cfg_attr(not(feature = "mangled-names"), no_mangle)] pub extern $abi fn $name( $($argname: $ty),* ) @@ -226,7 +226,7 @@ macro_rules! intrinsics { } } - #[cfg(not(all(windows, target_arch = "x86_64")))] + #[cfg(not(all(any(windows, target_os = "uefi"), target_arch = "x86_64")))] intrinsics! { $(#[$($attr)*])* pub extern $abi fn $name( $($argname: $ty),* ) $(-> $ret)? { @@ -426,7 +426,7 @@ macro_rules! intrinsics { // Hack for LLVM expectations for ABI on windows. This is used by the // `#[win64_128bit_abi_hack]` attribute recognized above -#[cfg(all(windows, target_pointer_width = "64"))] +#[cfg(all(any(windows, target_os = "uefi"), target_pointer_width = "64"))] pub mod win64_128bit_abi_hack { #[repr(simd)] pub struct U64x2(u64, u64); diff --git a/vendor/compiler_builtins/src/math.rs b/vendor/compiler_builtins/src/math.rs index fa59753f8..fa9836186 100644 --- a/vendor/compiler_builtins/src/math.rs +++ b/vendor/compiler_builtins/src/math.rs @@ -20,6 +20,7 @@ macro_rules! no_mangle { target_os = "unknown", not(target_env = "wasi") ), + target_os = "xous", all(target_arch = "x86_64", target_os = "uefi"), all(target_arch = "xtensa", target_os = "none"), all(target_vendor = "fortanix", target_env = "sgx") @@ -62,6 +63,8 @@ no_mangle! { fn tanhf(n: f32) -> f32; fn ldexp(f: f64, n: i32) -> f64; fn ldexpf(f: f32, n: i32) -> f32; + fn tgamma(x: f64) -> f64; + fn tgammaf(x: f32) -> f32; } #[cfg(any( @@ -70,6 +73,8 @@ no_mangle! { target_os = "unknown", not(target_env = "wasi") ), + target_os = "xous", + all(target_arch = "x86_64", target_os = "uefi"), all(target_arch = "xtensa", target_os = "none"), all(target_vendor = "fortanix", target_env = "sgx") ))] @@ -93,7 +98,17 @@ no_mangle! { fn tanf(n: f32) -> f32; } -#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] +#[cfg(any(target_os = "xous", target_os = "uefi"))] +no_mangle! { + fn sqrtf(x: f32) -> f32; + fn sqrt(x: f64) -> f64; +} + +#[cfg(any( + all(target_vendor = "fortanix", target_env = "sgx"), + target_os = "xous", + target_os = "uefi" +))] no_mangle! { fn ceil(x: f64) -> f64; fn ceilf(x: f32) -> f32; diff --git a/vendor/compiler_builtins/src/mem/impls.rs b/vendor/compiler_builtins/src/mem/impls.rs index 815132425..72003a5c4 100644 --- a/vendor/compiler_builtins/src/mem/impls.rs +++ b/vendor/compiler_builtins/src/mem/impls.rs @@ -265,3 +265,17 @@ pub unsafe fn set_bytes(mut s: *mut u8, c: u8, mut n: usize) { } set_bytes_bytes(s, c, n); } + +#[inline(always)] +pub unsafe fn compare_bytes(s1: *const u8, s2: *const u8, n: usize) -> i32 { + let mut i = 0; + while i < n { + let a = *s1.add(i); + let b = *s2.add(i); + if a != b { + return a as i32 - b as i32; + } + i += 1; + } + 0 +} diff --git a/vendor/compiler_builtins/src/mem/mod.rs b/vendor/compiler_builtins/src/mem/mod.rs index a55113861..c5b0ddc16 100644 --- a/vendor/compiler_builtins/src/mem/mod.rs +++ b/vendor/compiler_builtins/src/mem/mod.rs @@ -51,16 +51,7 @@ intrinsics! { #[mem_builtin] #[cfg_attr(not(all(target_os = "windows", target_env = "gnu")), linkage = "weak")] pub unsafe extern "C" fn memcmp(s1: *const u8, s2: *const u8, n: usize) -> i32 { - let mut i = 0; - while i < n { - let a = *s1.add(i); - let b = *s2.add(i); - if a != b { - return a as i32 - b as i32; - } - i += 1; - } - 0 + impls::compare_bytes(s1, s2, n) } #[mem_builtin] diff --git a/vendor/compiler_builtins/src/mem/x86_64.rs b/vendor/compiler_builtins/src/mem/x86_64.rs index a7ab6f605..17b461f79 100644 --- a/vendor/compiler_builtins/src/mem/x86_64.rs +++ b/vendor/compiler_builtins/src/mem/x86_64.rs @@ -16,6 +16,10 @@ // feature is present at compile-time. We don't bother detecting other features. // Note that ERMSB does not enhance the backwards (DF=1) "rep movsb". +use core::arch::asm; +use core::intrinsics; +use core::mem; + #[inline(always)] #[cfg(target_feature = "ermsb")] pub unsafe fn copy_forward(dest: *mut u8, src: *const u8, count: usize) { @@ -31,16 +35,26 @@ pub unsafe fn copy_forward(dest: *mut u8, src: *const u8, count: usize) { #[inline(always)] #[cfg(not(target_feature = "ermsb"))] -pub unsafe fn copy_forward(dest: *mut u8, src: *const u8, count: usize) { - let qword_count = count >> 3; - let byte_count = count & 0b111; - // FIXME: Use the Intel syntax once we drop LLVM 9 support on rust-lang/rust. - core::arch::asm!( - "repe movsq (%rsi), (%rdi)", - "mov {byte_count:e}, %ecx", - "repe movsb (%rsi), (%rdi)", - byte_count = in(reg) byte_count, +pub unsafe fn copy_forward(mut dest: *mut u8, mut src: *const u8, count: usize) { + let (pre_byte_count, qword_count, byte_count) = rep_param(dest, count); + // Separating the blocks gives the compiler more freedom to reorder instructions. + asm!( + "rep movsb", + inout("ecx") pre_byte_count => _, + inout("rdi") dest => dest, + inout("rsi") src => src, + options(att_syntax, nostack, preserves_flags) + ); + asm!( + "rep movsq", inout("rcx") qword_count => _, + inout("rdi") dest => dest, + inout("rsi") src => src, + options(att_syntax, nostack, preserves_flags) + ); + asm!( + "rep movsb", + inout("ecx") byte_count => _, inout("rdi") dest => _, inout("rsi") src => _, options(att_syntax, nostack, preserves_flags) @@ -49,22 +63,28 @@ pub unsafe fn copy_forward(dest: *mut u8, src: *const u8, count: usize) { #[inline(always)] pub unsafe fn copy_backward(dest: *mut u8, src: *const u8, count: usize) { - let qword_count = count >> 3; - let byte_count = count & 0b111; - // FIXME: Use the Intel syntax once we drop LLVM 9 support on rust-lang/rust. - core::arch::asm!( + let (pre_byte_count, qword_count, byte_count) = rep_param(dest, count); + // We can't separate this block due to std/cld + asm!( "std", - "repe movsq (%rsi), (%rdi)", - "movl {byte_count:e}, %ecx", - "addq $7, %rdi", - "addq $7, %rsi", - "repe movsb (%rsi), (%rdi)", + "rep movsb", + "sub $7, %rsi", + "sub $7, %rdi", + "mov {qword_count}, %rcx", + "rep movsq", + "test {pre_byte_count:e}, {pre_byte_count:e}", + "add $7, %rsi", + "add $7, %rdi", + "mov {pre_byte_count:e}, %ecx", + "rep movsb", "cld", - byte_count = in(reg) byte_count, - inout("rcx") qword_count => _, - inout("rdi") dest.add(count).wrapping_sub(8) => _, - inout("rsi") src.add(count).wrapping_sub(8) => _, - options(att_syntax, nostack) + pre_byte_count = in(reg) pre_byte_count, + qword_count = in(reg) qword_count, + inout("ecx") byte_count => _, + inout("rdi") dest.add(count - 1) => _, + inout("rsi") src.add(count - 1) => _, + // We modify flags, but we restore it afterwards + options(att_syntax, nostack, preserves_flags) ); } @@ -83,18 +103,82 @@ pub unsafe fn set_bytes(dest: *mut u8, c: u8, count: usize) { #[inline(always)] #[cfg(not(target_feature = "ermsb"))] -pub unsafe fn set_bytes(dest: *mut u8, c: u8, count: usize) { - let qword_count = count >> 3; - let byte_count = count & 0b111; - // FIXME: Use the Intel syntax once we drop LLVM 9 support on rust-lang/rust. - core::arch::asm!( - "repe stosq %rax, (%rdi)", - "mov {byte_count:e}, %ecx", - "repe stosb %al, (%rdi)", - byte_count = in(reg) byte_count, +pub unsafe fn set_bytes(mut dest: *mut u8, c: u8, count: usize) { + let c = c as u64 * 0x0101_0101_0101_0101; + let (pre_byte_count, qword_count, byte_count) = rep_param(dest, count); + // Separating the blocks gives the compiler more freedom to reorder instructions. + asm!( + "rep stosb", + inout("ecx") pre_byte_count => _, + inout("rdi") dest => dest, + in("rax") c, + options(att_syntax, nostack, preserves_flags) + ); + asm!( + "rep stosq", inout("rcx") qword_count => _, + inout("rdi") dest => dest, + in("rax") c, + options(att_syntax, nostack, preserves_flags) + ); + asm!( + "rep stosb", + inout("ecx") byte_count => _, inout("rdi") dest => _, - in("rax") (c as u64) * 0x0101010101010101, + in("rax") c, options(att_syntax, nostack, preserves_flags) ); } + +#[inline(always)] +pub unsafe fn compare_bytes(a: *const u8, b: *const u8, n: usize) -> i32 { + #[inline(always)] + unsafe fn cmp<T, U, F>(mut a: *const T, mut b: *const T, n: usize, f: F) -> i32 + where + T: Clone + Copy + Eq, + U: Clone + Copy + Eq, + F: FnOnce(*const U, *const U, usize) -> i32, + { + // Ensure T is not a ZST. + const { assert!(mem::size_of::<T>() != 0) }; + + let end = a.add(intrinsics::unchecked_div(n, mem::size_of::<T>())); + while a != end { + if a.read_unaligned() != b.read_unaligned() { + return f(a.cast(), b.cast(), mem::size_of::<T>()); + } + a = a.add(1); + b = b.add(1); + } + f( + a.cast(), + b.cast(), + intrinsics::unchecked_rem(n, mem::size_of::<T>()), + ) + } + let c1 = |mut a: *const u8, mut b: *const u8, n| { + for _ in 0..n { + if a.read() != b.read() { + return i32::from(a.read()) - i32::from(b.read()); + } + a = a.add(1); + b = b.add(1); + } + 0 + }; + let c2 = |a: *const u16, b, n| cmp(a, b, n, c1); + let c4 = |a: *const u32, b, n| cmp(a, b, n, c2); + let c8 = |a: *const u64, b, n| cmp(a, b, n, c4); + let c16 = |a: *const u128, b, n| cmp(a, b, n, c8); + c16(a.cast(), b.cast(), n) +} + +/// Determine optimal parameters for a `rep` instruction. +fn rep_param(dest: *mut u8, mut count: usize) -> (usize, usize, usize) { + // Unaligned writes are still slow on modern processors, so align the destination address. + let pre_byte_count = ((8 - (dest as usize & 0b111)) & 0b111).min(count); + count -= pre_byte_count; + let qword_count = count >> 3; + let byte_count = count & 0b111; + (pre_byte_count, qword_count, byte_count) +} |