Implement LLVM x86 SSE4.2 intrinsics
This commit is contained in:
Tobias Decking
parent
989dfb1066
commit
75571774d6
3 changed files with 929 additions and 0 deletions
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@ -18,6 +18,7 @@ mod sse;
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mod sse2;
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mod sse3;
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mod sse41;
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mod sse42;
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mod ssse3;
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impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
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@ -137,6 +138,11 @@ pub(super) trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
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this, link_name, abi, args, dest,
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);
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}
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name if name.starts_with("sse42.") => {
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return sse42::EvalContextExt::emulate_x86_sse42_intrinsic(
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this, link_name, abi, args, dest,
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);
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}
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name if name.starts_with("aesni.") => {
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return aesni::EvalContextExt::emulate_x86_aesni_intrinsic(
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this, link_name, abi, args, dest,
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500
src/tools/miri/src/shims/x86/sse42.rs
Normal file
500
src/tools/miri/src/shims/x86/sse42.rs
Normal file
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@ -0,0 +1,500 @@
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use rustc_middle::mir;
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use rustc_middle::ty::layout::LayoutOf as _;
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use rustc_middle::ty::Ty;
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use rustc_span::Symbol;
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use rustc_target::abi::Size;
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use rustc_target::spec::abi::Abi;
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use crate::*;
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/// A bitmask constant for scrutinizing the immediate byte provided
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/// to the string comparison intrinsics. It distinuishes between
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/// 16-bit integers and 8-bit integers. See [`compare_strings`]
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/// for more details about the immediate byte.
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const USE_WORDS: u8 = 1;
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/// A bitmask constant for scrutinizing the immediate byte provided
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/// to the string comparison intrinsics. It distinuishes between
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/// signed integers and unsigned integers. See [`compare_strings`]
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/// for more details about the immediate byte.
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const USE_SIGNED: u8 = 2;
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/// The main worker for the string comparison intrinsics, where the given
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/// strings are analyzed according to the given immediate byte.
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///
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/// # Arguments
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///
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/// * `str1` - The first string argument. It is always a length 16 array of bytes
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/// or a length 8 array of two-byte words.
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/// * `str2` - The second string argument. It is always a length 16 array of bytes
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/// or a length 8 array of two-byte words.
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/// * `len` is the length values of the supplied strings. It is distinct from the operand length
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/// in that it describes how much of `str1` and `str2` will be used for the calculation and may
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/// be smaller than the array length of `str1` and `str2`. The string length is counted in bytes
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/// if using byte operands and in two-byte words when using two-byte word operands.
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/// If the value is `None`, the length of a string is determined by the first
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/// null value inside the string.
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/// * `imm` is the immediate byte argument supplied to the intrinsic. The byte influences
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/// the operation as follows:
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///
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/// ```text
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/// 0babccddef
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/// || | |||- Use of bytes vs use of two-byte words inside the operation.
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/// || | ||
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/// || | ||- Use of signed values versus use of unsigned values.
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/// || | |
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/// || | |- The comparison operation performed. A total of four operations are available.
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/// || | * Equal any: Checks which characters of `str2` are inside `str1`.
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/// || | * String ranges: Check if characters in `str2` are inside the provided character ranges.
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/// || | Adjacent characters in `str1` constitute one range.
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/// || | * String comparison: Mark positions where `str1` and `str2` have the same character.
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/// || | * Substring search: Mark positions where `str1` is a substring in `str2`.
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/// || |
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/// || |- Result Polarity. The result bits may be subjected to a bitwise complement
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/// || if these bits are set.
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/// ||
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/// ||- Output selection. This bit has two meanings depending on the instruction.
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/// | If the instruction is generating a mask, it distinguishes between a bit mask
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/// | and a byte mask. Otherwise it distinguishes between the most significand bit
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/// | and the least significand bit when generating an index.
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/// |
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/// |- This bit is ignored. It is expected that this bit is set to zero, but it is
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/// not a requirement.
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/// ```
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///
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/// # Returns
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///
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/// A result mask. The bit at index `i` inside the mask is set if 'str2' starting at `i`
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/// fulfills the test as defined inside the immediate byte.
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/// The mask may be negated if negation flags inside the immediate byte are set.
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///
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/// For more information, see the Intel Software Developer's Manual, Vol. 2b, Chapter 4.1.
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#[allow(clippy::arithmetic_side_effects)]
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fn compare_strings<'tcx>(
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this: &mut MiriInterpCx<'tcx>,
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str1: &OpTy<'tcx>,
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str2: &OpTy<'tcx>,
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len: Option<(u64, u64)>,
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imm: u8,
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) -> InterpResult<'tcx, i32> {
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let default_len = default_len::<u64>(imm);
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let (len1, len2) = if let Some(t) = len {
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t
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} else {
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let len1 = implicit_len(this, str1, imm)?.unwrap_or(default_len);
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let len2 = implicit_len(this, str2, imm)?.unwrap_or(default_len);
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(len1, len2)
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};
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let mut result = 0;
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match (imm >> 2) & 3 {
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0 => {
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// Equal any: Checks which characters of `str2` are inside `str1`.
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for i in 0..len2 {
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let ch2 = this.read_immediate(&this.project_index(str2, i)?)?;
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for j in 0..len1 {
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let ch1 = this.read_immediate(&this.project_index(str1, j)?)?;
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let eq = this.binary_op(mir::BinOp::Eq, &ch1, &ch2)?;
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if eq.to_scalar().to_bool()? {
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result |= 1 << i;
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break;
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}
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}
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}
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}
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1 => {
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// String ranges: Check if characters in `str2` are inside the provided character ranges.
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// Adjacent characters in `str1` constitute one range.
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let len1 = len1 - (len1 & 1);
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let get_ch = |ch: Scalar| -> InterpResult<'tcx, i32> {
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let result = match (imm & USE_WORDS != 0, imm & USE_SIGNED != 0) {
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(true, true) => i32::from(ch.to_i16()?),
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(true, false) => i32::from(ch.to_u16()?),
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(false, true) => i32::from(ch.to_i8()?),
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(false, false) => i32::from(ch.to_u8()?),
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};
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Ok(result)
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};
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for i in 0..len2 {
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for j in (0..len1).step_by(2) {
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let ch2 = get_ch(this.read_scalar(&this.project_index(str2, i)?)?)?;
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let ch1_1 = get_ch(this.read_scalar(&this.project_index(str1, j)?)?)?;
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let ch1_2 = get_ch(this.read_scalar(&this.project_index(str1, j + 1)?)?)?;
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if ch1_1 <= ch2 && ch2 <= ch1_2 {
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result |= 1 << i;
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}
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}
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}
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}
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2 => {
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// String comparison: Mark positions where `str1` and `str2` have the same character.
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result = (1 << default_len) - 1;
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result ^= (1 << len1.max(len2)) - 1;
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for i in 0..len1.min(len2) {
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let ch1 = this.read_immediate(&this.project_index(str1, i)?)?;
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let ch2 = this.read_immediate(&this.project_index(str2, i)?)?;
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let eq = this.binary_op(mir::BinOp::Eq, &ch1, &ch2)?;
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result |= i32::from(eq.to_scalar().to_bool()?) << i;
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}
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}
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3 => {
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// Substring search: Mark positions where `str1` is a substring in `str2`.
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if len1 == 0 {
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result = (1 << default_len) - 1;
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} else if len1 <= len2 {
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for i in 0..len2 {
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if len1 > len2 - i {
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break;
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}
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result |= 1 << i;
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for j in 0..len1 {
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let k = i + j;
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if k >= default_len {
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break;
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} else {
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let ch1 = this.read_immediate(&this.project_index(str1, j)?)?;
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let ch2 = this.read_immediate(&this.project_index(str2, k)?)?;
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let ne = this.binary_op(mir::BinOp::Ne, &ch1, &ch2)?;
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if ne.to_scalar().to_bool()? {
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result &= !(1 << i);
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break;
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}
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}
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}
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}
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}
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}
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_ => unreachable!(),
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}
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// Polarity: Possibly perform a bitwise complement on the result.
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match (imm >> 4) & 3 {
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3 => result ^= (1 << len1) - 1,
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1 => result ^= (1 << default_len) - 1,
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_ => (),
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}
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Ok(result)
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}
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/// Obtain the arguments of the intrinsic based on its name.
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/// The result is a tuple with the following values:
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/// * The first string argument.
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/// * The second string argument.
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/// * The string length values, if the intrinsic requires them.
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/// * The immediate instruction byte.
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///
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/// The string arguments will be transmuted into arrays of bytes
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/// or two-byte words, depending on the value of the immediate byte.
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/// Originally, they are [__m128i](https://doc.rust-lang.org/stable/core/arch/x86_64/struct.__m128i.html) values
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/// corresponding to the x86 128-bit integer SIMD type.
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fn deconstruct_args<'tcx>(
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unprefixed_name: &str,
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this: &mut MiriInterpCx<'tcx>,
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link_name: Symbol,
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abi: Abi,
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args: &[OpTy<'tcx>],
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) -> InterpResult<'tcx, (OpTy<'tcx>, OpTy<'tcx>, Option<(u64, u64)>, u8)> {
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let array_layout_fn = |this: &mut MiriInterpCx<'tcx>, imm: u8| {
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if imm & USE_WORDS != 0 {
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this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u16, 8))
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} else {
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this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u8, 16))
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}
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};
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// The fourth letter of each string comparison intrinsic is either 'e' for "explicit" or 'i' for "implicit".
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// The distinction will correspond to the intrinsics type signature. In this constext, "explicit" and "implicit"
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// refer to the way the string length is determined. The length is either passed explicitly in the "explicit"
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// case or determined by a null terminator in the "implicit" case.
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let is_explicit = match unprefixed_name.as_bytes().get(4) {
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Some(&b'e') => true,
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Some(&b'i') => false,
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_ => unreachable!(),
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};
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if is_explicit {
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let [str1, len1, str2, len2, imm] =
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this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
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let imm = this.read_scalar(imm)?.to_u8()?;
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let default_len = default_len::<u32>(imm);
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let len1 = u64::from(this.read_scalar(len1)?.to_u32()?.min(default_len));
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let len2 = u64::from(this.read_scalar(len2)?.to_u32()?.min(default_len));
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let array_layout = array_layout_fn(this, imm)?;
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let str1 = str1.transmute(array_layout, this)?;
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let str2 = str2.transmute(array_layout, this)?;
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Ok((str1, str2, Some((len1, len2)), imm))
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} else {
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let [str1, str2, imm] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
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let imm = this.read_scalar(imm)?.to_u8()?;
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let array_layout = array_layout_fn(this, imm)?;
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let str1 = str1.transmute(array_layout, this)?;
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let str2 = str2.transmute(array_layout, this)?;
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Ok((str1, str2, None, imm))
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}
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}
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/// Calculate the c-style string length for a given string `str`.
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/// The string is either a length 16 array of bytes a length 8 array of two-byte words.
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fn implicit_len<'tcx>(
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this: &mut MiriInterpCx<'tcx>,
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str: &OpTy<'tcx>,
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imm: u8,
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) -> InterpResult<'tcx, Option<u64>> {
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let mut result = None;
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let zero = ImmTy::from_int(0, str.layout.field(this, 0));
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for i in 0..default_len::<u64>(imm) {
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let ch = this.read_immediate(&this.project_index(str, i)?)?;
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let is_zero = this.binary_op(mir::BinOp::Eq, &ch, &zero)?;
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if is_zero.to_scalar().to_bool()? {
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result = Some(i);
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break;
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}
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}
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Ok(result)
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}
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#[inline]
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fn default_len<T: From<u8>>(imm: u8) -> T {
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if imm & USE_WORDS != 0 { T::from(8u8) } else { T::from(16u8) }
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}
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impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
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pub(super) trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
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fn emulate_x86_sse42_intrinsic(
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&mut self,
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link_name: Symbol,
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abi: Abi,
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args: &[OpTy<'tcx>],
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dest: &MPlaceTy<'tcx>,
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) -> InterpResult<'tcx, EmulateItemResult> {
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let this = self.eval_context_mut();
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this.expect_target_feature_for_intrinsic(link_name, "sse4.2")?;
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// Prefix should have already been checked.
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let unprefixed_name = link_name.as_str().strip_prefix("llvm.x86.sse42.").unwrap();
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match unprefixed_name {
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// Used to implement the `_mm_cmpestrm` and the `_mm_cmpistrm` functions.
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// These functions compare the input strings and return the resulting mask.
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// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=1044,922
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"pcmpistrm128" | "pcmpestrm128" => {
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let (str1, str2, len, imm) =
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deconstruct_args(unprefixed_name, this, link_name, abi, args)?;
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let mask = compare_strings(this, &str1, &str2, len, imm)?;
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// The sixth bit inside the immediate byte distiguishes
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// between a bit mask or a byte mask when generating a mask.
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if imm & 0b100_0000 != 0 {
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let (array_layout, size) = if imm & USE_WORDS != 0 {
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(this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u16, 8))?, 2)
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} else {
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(this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u8, 16))?, 1)
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};
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let size = Size::from_bytes(size);
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let dest = dest.transmute(array_layout, this)?;
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for i in 0..default_len::<u64>(imm) {
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let result = helpers::bool_to_simd_element(mask & (1 << i) != 0, size);
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this.write_scalar(result, &this.project_index(&dest, i)?)?;
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}
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} else {
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let layout = this.layout_of(this.tcx.types.i128)?;
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let dest = dest.transmute(layout, this)?;
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this.write_scalar(Scalar::from_i128(i128::from(mask)), &dest)?;
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}
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}
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// Used to implement the `_mm_cmpestra` and the `_mm_cmpistra` functions.
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// These functions compare the input strings and return `1` if the end of the second
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// input string is not reached and the resulting mask is zero, and `0` otherwise.
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// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=919,1041
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"pcmpistria128" | "pcmpestria128" => {
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let (str1, str2, len, imm) =
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deconstruct_args(unprefixed_name, this, link_name, abi, args)?;
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let result = if compare_strings(this, &str1, &str2, len, imm)? != 0 {
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false
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} else if let Some((_, len)) = len {
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len >= default_len::<u64>(imm)
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} else {
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implicit_len(this, &str1, imm)?.is_some()
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};
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this.write_scalar(Scalar::from_i32(i32::from(result)), dest)?;
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}
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// Used to implement the `_mm_cmpestri` and the `_mm_cmpistri` functions.
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// These functions compare the input strings and return the bit index
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// for most significant or least significant bit of the resulting mask.
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// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=921,1043
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"pcmpistri128" | "pcmpestri128" => {
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let (str1, str2, len, imm) =
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deconstruct_args(unprefixed_name, this, link_name, abi, args)?;
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let mask = compare_strings(this, &str1, &str2, len, imm)?;
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let len = default_len::<u32>(imm);
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// The sixth bit inside the immediate byte distiguishes between the least
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// significant bit and the most significant bit when generating an index.
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let result = if imm & 0b100_0000 != 0 {
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// most significant bit
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31u32.wrapping_sub(mask.leading_zeros()).min(len)
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} else {
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// least significant bit
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mask.trailing_zeros().min(len)
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};
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this.write_scalar(Scalar::from_i32(i32::try_from(result).unwrap()), dest)?;
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}
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// Used to implement the `_mm_cmpestro` and the `_mm_cmpistro` functions.
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// These functions compare the input strings and return the lowest bit of the
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// resulting mask.
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// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=923,1045
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"pcmpistrio128" | "pcmpestrio128" => {
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let (str1, str2, len, imm) =
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deconstruct_args(unprefixed_name, this, link_name, abi, args)?;
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let mask = compare_strings(this, &str1, &str2, len, imm)?;
|
||||
this.write_scalar(Scalar::from_i32(mask & 1), dest)?;
|
||||
}
|
||||
|
||||
// Used to implement the `_mm_cmpestrc` and the `_mm_cmpistrc` functions.
|
||||
// These functions compare the input strings and return `1` if the resulting
|
||||
// mask was non-zero, and `0` otherwise.
|
||||
// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=920,1042
|
||||
"pcmpistric128" | "pcmpestric128" => {
|
||||
let (str1, str2, len, imm) =
|
||||
deconstruct_args(unprefixed_name, this, link_name, abi, args)?;
|
||||
let mask = compare_strings(this, &str1, &str2, len, imm)?;
|
||||
this.write_scalar(Scalar::from_i32(i32::from(mask != 0)), dest)?;
|
||||
}
|
||||
|
||||
// Used to implement the `_mm_cmpistrz` and the `_mm_cmpistrs` functions.
|
||||
// These functions return `1` if the string end has been reached and `0` otherwise.
|
||||
// Since these functions define the string length implicitly, it is equal to a
|
||||
// search for a null terminator (see `deconstruct_args` for more details).
|
||||
// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=924,925
|
||||
"pcmpistriz128" | "pcmpistris128" => {
|
||||
let [str1, str2, imm] =
|
||||
this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
|
||||
let imm = this.read_scalar(imm)?.to_u8()?;
|
||||
|
||||
let str = if unprefixed_name == "pcmpistris128" { str1 } else { str2 };
|
||||
let array_layout = if imm & USE_WORDS != 0 {
|
||||
this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u16, 8))?
|
||||
} else {
|
||||
this.layout_of(Ty::new_array(this.tcx.tcx, this.tcx.types.u8, 16))?
|
||||
};
|
||||
let str = str.transmute(array_layout, this)?;
|
||||
let result = implicit_len(this, &str, imm)?.is_some();
|
||||
|
||||
this.write_scalar(Scalar::from_i32(i32::from(result)), dest)?;
|
||||
}
|
||||
|
||||
// Used to implement the `_mm_cmpestrz` and the `_mm_cmpestrs` functions.
|
||||
// These functions return 1 if the explicitly passed string length is smaller
|
||||
// than 16 for byte-sized operands or 8 for word-sized operands.
|
||||
// https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#ig_expand=1046,1047
|
||||
"pcmpestriz128" | "pcmpestris128" => {
|
||||
let [_, len1, _, len2, imm] =
|
||||
this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
|
||||
let len = if unprefixed_name == "pcmpestris128" { len1 } else { len2 };
|
||||
let len = this.read_scalar(len)?.to_i32()?;
|
||||
let imm = this.read_scalar(imm)?.to_u8()?;
|
||||
this.write_scalar(
|
||||
Scalar::from_i32(i32::from(len < default_len::<i32>(imm))),
|
||||
dest,
|
||||
)?;
|
||||
}
|
||||
|
||||
// Used to implement the `_mm_crc32_u{8, 16, 32, 64}` functions.
|
||||
// These functions calculate a 32-bit CRC using `0x11EDC6F41`
|
||||
// as the polynomial, also known as CRC32C.
|
||||
// https://datatracker.ietf.org/doc/html/rfc3720#section-12.1
|
||||
"crc32.32.8" | "crc32.32.16" | "crc32.32.32" | "crc32.64.64" => {
|
||||
let bit_size = match unprefixed_name {
|
||||
"crc32.32.8" => 8,
|
||||
"crc32.32.16" => 16,
|
||||
"crc32.32.32" => 32,
|
||||
"crc32.64.64" => 64,
|
||||
_ => unreachable!(),
|
||||
};
|
||||
|
||||
if bit_size == 64 && this.tcx.sess.target.arch != "x86_64" {
|
||||
return Ok(EmulateItemResult::NotSupported);
|
||||
}
|
||||
|
||||
let [left, right] =
|
||||
this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?;
|
||||
let left = this.read_scalar(left)?;
|
||||
let right = this.read_scalar(right)?;
|
||||
|
||||
let crc = if bit_size == 64 {
|
||||
// The 64-bit version will only consider the lower 32 bits,
|
||||
// while the upper 32 bits get discarded.
|
||||
#[allow(clippy::cast_possible_truncation)]
|
||||
u128::from((left.to_u64()? as u32).reverse_bits())
|
||||
} else {
|
||||
u128::from(left.to_u32()?.reverse_bits())
|
||||
};
|
||||
let v = match bit_size {
|
||||
8 => u128::from(right.to_u8()?.reverse_bits()),
|
||||
16 => u128::from(right.to_u16()?.reverse_bits()),
|
||||
32 => u128::from(right.to_u32()?.reverse_bits()),
|
||||
64 => u128::from(right.to_u64()?.reverse_bits()),
|
||||
_ => unreachable!(),
|
||||
};
|
||||
|
||||
// Perform polynomial division modulo 2.
|
||||
// The algorithm for the division is an adapted version of the
|
||||
// schoolbook division algorithm used for normal integer or polynomial
|
||||
// division. In this context, the quotient is not calculated, since
|
||||
// only the remainder is needed.
|
||||
//
|
||||
// The algorithm works as follows:
|
||||
// 1. Pull down digits until division can be performed. In the context of division
|
||||
// modulo 2 it means locating the most significant digit of the dividend and shifting
|
||||
// the divisor such that the position of the divisors most significand digit and the
|
||||
// dividends most significand digit match.
|
||||
// 2. Perform a division and determine the remainder. Since it is arithmetic modulo 2,
|
||||
// this operation is a simple bitwise exclusive or.
|
||||
// 3. Repeat steps 1. and 2. until the full remainder is calculated. This is the case
|
||||
// once the degree of the remainder polynomial is smaller than the degree of the
|
||||
// divisor polynomial. In other words, the number of leading zeros of the remainder
|
||||
// is larger than the number of leading zeros of the divisor. It is important to
|
||||
// note that standard arithmetic comparison is not applicable here:
|
||||
// 0b10011 / 0b11111 = 0b01100 is a valid division, even though the dividend is
|
||||
// smaller than the divisor.
|
||||
let mut dividend = (crc << bit_size) ^ (v << 32);
|
||||
const POLYNOMIAL: u128 = 0x11EDC6F41;
|
||||
while dividend.leading_zeros() <= POLYNOMIAL.leading_zeros() {
|
||||
dividend ^=
|
||||
(POLYNOMIAL << POLYNOMIAL.leading_zeros()) >> dividend.leading_zeros();
|
||||
}
|
||||
|
||||
let result = u32::try_from(dividend).unwrap().reverse_bits();
|
||||
let result = if bit_size == 64 {
|
||||
Scalar::from_u64(u64::from(result))
|
||||
} else {
|
||||
Scalar::from_u32(result)
|
||||
};
|
||||
|
||||
this.write_scalar(result, dest)?;
|
||||
}
|
||||
_ => return Ok(EmulateItemResult::NotSupported),
|
||||
}
|
||||
Ok(EmulateItemResult::NeedsReturn)
|
||||
}
|
||||
}
|
||||
423
src/tools/miri/tests/pass/shims/x86/intrinsics-x86-sse42.rs
Normal file
423
src/tools/miri/tests/pass/shims/x86/intrinsics-x86-sse42.rs
Normal file
|
|
@ -0,0 +1,423 @@
|
|||
// Ignore everything except x86 and x86_64
|
||||
// Any new targets that are added to CI should be ignored here.
|
||||
// (We cannot use `cfg`-based tricks here since the `target-feature` flags below only work on x86.)
|
||||
//@ignore-target-aarch64
|
||||
//@ignore-target-arm
|
||||
//@ignore-target-avr
|
||||
//@ignore-target-s390x
|
||||
//@ignore-target-thumbv7em
|
||||
//@ignore-target-wasm32
|
||||
//@compile-flags: -C target-feature=+sse4.2
|
||||
|
||||
#[cfg(target_arch = "x86")]
|
||||
use std::arch::x86::*;
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
use std::arch::x86_64::*;
|
||||
use std::mem::transmute;
|
||||
|
||||
fn main() {
|
||||
assert!(is_x86_feature_detected!("sse4.2"));
|
||||
|
||||
unsafe {
|
||||
test_sse42();
|
||||
}
|
||||
}
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_sse42() {
|
||||
// Mostly copied from library/stdarch/crates/core_arch/src/x86/sse42.rs
|
||||
|
||||
test_crc();
|
||||
test_cmp();
|
||||
test_str();
|
||||
}
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_crc() {
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_crc32_u8() {
|
||||
let crc = 0x2aa1e72b;
|
||||
let v = 0x2a;
|
||||
let i = _mm_crc32_u8(crc, v);
|
||||
assert_eq!(i, 0xf24122e4);
|
||||
|
||||
let crc = 0x61343ec4;
|
||||
let v = 0xef;
|
||||
let i = _mm_crc32_u8(crc, v);
|
||||
assert_eq!(i, 0xb95511db);
|
||||
}
|
||||
test_mm_crc32_u8();
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_crc32_u16() {
|
||||
let crc = 0x8ecec3b5;
|
||||
let v = 0x22b;
|
||||
let i = _mm_crc32_u16(crc, v);
|
||||
assert_eq!(i, 0x13bb2fb);
|
||||
|
||||
let crc = 0x150bc664;
|
||||
let v = 0xa6c0;
|
||||
let i = _mm_crc32_u16(crc, v);
|
||||
assert_eq!(i, 0xab04fe4e);
|
||||
}
|
||||
test_mm_crc32_u16();
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_crc32_u32() {
|
||||
let crc = 0xae2912c8;
|
||||
let v = 0x845fed;
|
||||
let i = _mm_crc32_u32(crc, v);
|
||||
assert_eq!(i, 0xffae2ed1);
|
||||
|
||||
let crc = 0x1a198fe3;
|
||||
let v = 0x885585c2;
|
||||
let i = _mm_crc32_u32(crc, v);
|
||||
assert_eq!(i, 0x22443a7b);
|
||||
}
|
||||
test_mm_crc32_u32();
|
||||
|
||||
#[cfg(target_arch = "x86_64")]
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_crc32_u64() {
|
||||
let crc = 0x7819dccd3e824;
|
||||
let v = 0x2a22b845fed;
|
||||
let i = _mm_crc32_u64(crc, v);
|
||||
assert_eq!(i, 0xbb6cdc6c);
|
||||
|
||||
let crc = 0x6dd960387fe13819;
|
||||
let v = 0x1a7ea8fb571746b0;
|
||||
let i = _mm_crc32_u64(crc, v);
|
||||
assert_eq!(i, 0x315b4f6);
|
||||
}
|
||||
#[cfg(not(target_arch = "x86_64"))]
|
||||
unsafe fn test_mm_crc32_u64() {}
|
||||
test_mm_crc32_u64();
|
||||
}
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_cmp() {
|
||||
let a = _mm_set_epi64x(0x2a, 0);
|
||||
let b = _mm_set1_epi64x(0x00);
|
||||
let i = _mm_cmpgt_epi64(a, b);
|
||||
assert_eq_m128i(i, _mm_set_epi64x(0xffffffffffffffffu64 as i64, 0x00));
|
||||
}
|
||||
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_str() {
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn str_to_m128i(s: &[u8]) -> __m128i {
|
||||
assert!(s.len() <= 16);
|
||||
let slice = &mut [0u8; 16];
|
||||
std::ptr::copy_nonoverlapping(s.as_ptr(), slice.as_mut_ptr(), s.len());
|
||||
_mm_loadu_si128(slice.as_ptr() as *const _)
|
||||
}
|
||||
|
||||
// Test the `_mm_cmpistrm` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistrm() {
|
||||
let a = str_to_m128i(b"Hello! Good-Bye!");
|
||||
let b = str_to_m128i(b"hello! good-bye!");
|
||||
let i = _mm_cmpistrm::<_SIDD_UNIT_MASK>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
0x00, !0, !0, !0, !0, !0, !0, 0x00,
|
||||
!0, !0, !0, !0, 0x00, !0, !0, !0,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_mm_cmpistrm();
|
||||
|
||||
// Test the `_mm_cmpistri` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistri() {
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b" Hello ");
|
||||
let i = _mm_cmpistri::<_SIDD_CMP_EQUAL_ORDERED>(a, b);
|
||||
assert_eq!(3, i);
|
||||
}
|
||||
test_mm_cmpistri();
|
||||
|
||||
// Test the `_mm_cmpistrz` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistrz() {
|
||||
let a = str_to_m128i(b"");
|
||||
let b = str_to_m128i(b"Hello");
|
||||
let i = _mm_cmpistrz::<_SIDD_CMP_EQUAL_ORDERED>(a, b);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpistrz();
|
||||
|
||||
// Test the `_mm_cmpistrc` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistrc() {
|
||||
let a = str_to_m128i(b" ");
|
||||
let b = str_to_m128i(b" ! ");
|
||||
let i = _mm_cmpistrc::<_SIDD_UNIT_MASK>(a, b);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpistrc();
|
||||
|
||||
// Test the `_mm_cmpistrs` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistrs() {
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b"");
|
||||
let i = _mm_cmpistrs::<_SIDD_CMP_EQUAL_ORDERED>(a, b);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpistrs();
|
||||
|
||||
// Test the `_mm_cmpistro` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistro() {
|
||||
#[rustfmt::skip]
|
||||
let a_bytes = _mm_setr_epi8(
|
||||
0x00, 0x47, 0x00, 0x65, 0x00, 0x6c, 0x00, 0x6c,
|
||||
0x00, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
#[rustfmt::skip]
|
||||
let b_bytes = _mm_setr_epi8(
|
||||
0x00, 0x48, 0x00, 0x65, 0x00, 0x6c, 0x00, 0x6c,
|
||||
0x00, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
let a = a_bytes;
|
||||
let b = b_bytes;
|
||||
let i = _mm_cmpistro::<{ _SIDD_UWORD_OPS | _SIDD_UNIT_MASK }>(a, b);
|
||||
assert_eq!(0, i);
|
||||
}
|
||||
test_mm_cmpistro();
|
||||
|
||||
// Test the `_mm_cmpistra` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpistra() {
|
||||
let a = str_to_m128i(b"");
|
||||
let b = str_to_m128i(b"Hello!!!!!!!!!!!");
|
||||
let i = _mm_cmpistra::<_SIDD_UNIT_MASK>(a, b);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpistra();
|
||||
|
||||
// Test the `_mm_cmpestrm` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestrm() {
|
||||
let a = str_to_m128i(b"Hello!");
|
||||
let b = str_to_m128i(b"Hello.");
|
||||
let i = _mm_cmpestrm::<_SIDD_UNIT_MASK>(a, 5, b, 5);
|
||||
#[rustfmt::skip]
|
||||
let r = _mm_setr_epi8(
|
||||
!0, !0, !0, !0, !0, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
assert_eq_m128i(i, r);
|
||||
}
|
||||
test_mm_cmpestrm();
|
||||
|
||||
// Test the `_mm_cmpestri` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestri() {
|
||||
let a = str_to_m128i(b"bar - garbage");
|
||||
let b = str_to_m128i(b"foobar");
|
||||
let i = _mm_cmpestri::<_SIDD_CMP_EQUAL_ORDERED>(a, 3, b, 6);
|
||||
assert_eq!(3, i);
|
||||
}
|
||||
test_mm_cmpestri();
|
||||
|
||||
// Test the `_mm_cmpestrz` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestrz() {
|
||||
let a = str_to_m128i(b"");
|
||||
let b = str_to_m128i(b"Hello");
|
||||
let i = _mm_cmpestrz::<_SIDD_CMP_EQUAL_ORDERED>(a, 16, b, 6);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpestrz();
|
||||
|
||||
// Test the `_mm_cmpestrs` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestrc() {
|
||||
let va = str_to_m128i(b"!!!!!!!!");
|
||||
let vb = str_to_m128i(b" ");
|
||||
let i = _mm_cmpestrc::<_SIDD_UNIT_MASK>(va, 7, vb, 7);
|
||||
assert_eq!(0, i);
|
||||
}
|
||||
test_mm_cmpestrc();
|
||||
|
||||
// Test the `_mm_cmpestrs` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestrs() {
|
||||
#[rustfmt::skip]
|
||||
let a_bytes = _mm_setr_epi8(
|
||||
0x00, 0x48, 0x00, 0x65, 0x00, 0x6c, 0x00, 0x6c,
|
||||
0x00, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
let a = a_bytes;
|
||||
let b = _mm_set1_epi8(0x00);
|
||||
let i = _mm_cmpestrs::<_SIDD_UWORD_OPS>(a, 8, b, 0);
|
||||
assert_eq!(0, i);
|
||||
}
|
||||
test_mm_cmpestrs();
|
||||
|
||||
// Test the `_mm_cmpestro` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestro() {
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b"World");
|
||||
let i = _mm_cmpestro::<_SIDD_UBYTE_OPS>(a, 5, b, 5);
|
||||
assert_eq!(0, i);
|
||||
}
|
||||
test_mm_cmpestro();
|
||||
|
||||
// Test the `_mm_cmpestra` intrinsic.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_mm_cmpestra() {
|
||||
let a = str_to_m128i(b"Cannot match a");
|
||||
let b = str_to_m128i(b"Null after 14");
|
||||
let i = _mm_cmpestra::<{ _SIDD_CMP_EQUAL_EACH | _SIDD_UNIT_MASK }>(a, 14, b, 16);
|
||||
assert_eq!(1, i);
|
||||
}
|
||||
test_mm_cmpestra();
|
||||
|
||||
// Additional tests not inside the standard library.
|
||||
|
||||
// Test the subset functionality of the intrinsic.
|
||||
unsafe fn test_subset() {
|
||||
let a = str_to_m128i(b"ABCDEFG");
|
||||
let b = str_to_m128i(b"ABC UVW XYZ EFG");
|
||||
|
||||
let i = _mm_cmpistrm::<{ _SIDD_CMP_EQUAL_ANY | _SIDD_UNIT_MASK }>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
!0, !0, !0, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, !0, !0, !0, 0x00,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_subset();
|
||||
|
||||
// Properly test index generation.
|
||||
unsafe fn test_index() {
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b"Hello Hello H");
|
||||
|
||||
let i = _mm_cmpistri::<{ _SIDD_CMP_EQUAL_EACH | _SIDD_LEAST_SIGNIFICANT }>(a, b);
|
||||
assert_eq!(i, 0);
|
||||
|
||||
let i = _mm_cmpistri::<{ _SIDD_CMP_EQUAL_EACH | _SIDD_MOST_SIGNIFICANT }>(a, b);
|
||||
assert_eq!(i, 15);
|
||||
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b" ");
|
||||
let i = _mm_cmpistri::<{ _SIDD_CMP_EQUAL_EACH | _SIDD_MOST_SIGNIFICANT }>(a, b);
|
||||
assert_eq!(i, 16);
|
||||
}
|
||||
test_index();
|
||||
|
||||
// Properly test the substring functionality of the intrinsics.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_substring() {
|
||||
let a = str_to_m128i(b"Hello");
|
||||
let b = str_to_m128i(b"Hello Hello H");
|
||||
|
||||
let i = _mm_cmpistrm::<{ _SIDD_CMP_EQUAL_ORDERED | _SIDD_UNIT_MASK }>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
!0, 0x00, 0x00, 0x00, 0x00, 0x00, !0, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_substring();
|
||||
|
||||
// Test the range functionality of the intrinsics.
|
||||
// Will also test signed values and word-sized values.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_ranges() {
|
||||
let a = _mm_setr_epi16(0, 1, 7, 8, 0, 0, -100, 100);
|
||||
let b = _mm_setr_epi16(1, 2, 3, 4, 5, 6, 7, 8);
|
||||
|
||||
let i =
|
||||
_mm_cmpestrm::<{ _SIDD_SWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK }>(a, 2, b, 8);
|
||||
let res = _mm_setr_epi16(!0, 0, 0, 0, 0, 0, 0, 0);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i =
|
||||
_mm_cmpestrm::<{ _SIDD_SWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK }>(a, 3, b, 8);
|
||||
let res = _mm_setr_epi16(!0, 0, 0, 0, 0, 0, 0, 0);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i =
|
||||
_mm_cmpestrm::<{ _SIDD_SWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK }>(a, 4, b, 8);
|
||||
let res = _mm_setr_epi16(!0, 0, 0, 0, 0, 0, !0, !0);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i =
|
||||
_mm_cmpestrm::<{ _SIDD_SWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK }>(a, 6, b, 8);
|
||||
let res = _mm_setr_epi16(!0, 0, 0, 0, 0, 0, !0, !0);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i =
|
||||
_mm_cmpestrm::<{ _SIDD_SWORD_OPS | _SIDD_CMP_RANGES | _SIDD_UNIT_MASK }>(a, 8, b, 8);
|
||||
let res = _mm_setr_epi16(!0, !0, !0, !0, !0, !0, !0, !0);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_ranges();
|
||||
|
||||
// Confirm that the polarity bits work as indended.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_polarity() {
|
||||
let a = str_to_m128i(b"Hello!");
|
||||
let b = str_to_m128i(b"hello?");
|
||||
|
||||
let i = _mm_cmpistrm::<
|
||||
{ (_SIDD_MASKED_NEGATIVE_POLARITY ^ _SIDD_NEGATIVE_POLARITY) | _SIDD_UNIT_MASK },
|
||||
>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
0x00, !0, !0, !0, !0, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i = _mm_cmpistrm::<{ _SIDD_MASKED_NEGATIVE_POLARITY | _SIDD_UNIT_MASK }>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
!0, 0x00, 0x00, 0x00, 0x00, !0, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i = _mm_cmpistrm::<{ _SIDD_NEGATIVE_POLARITY | _SIDD_UNIT_MASK }>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi8(
|
||||
!0, 0x00, 0x00, 0x00, 0x00, !0, !0, !0,
|
||||
!0, !0, !0, !0, !0, !0, !0, !0,
|
||||
);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_polarity();
|
||||
|
||||
// Test the code path in which the intrinsic is supposed to
|
||||
// return a bit mask instead of a byte mask.
|
||||
#[target_feature(enable = "sse4.2")]
|
||||
unsafe fn test_bitmask() {
|
||||
let a = str_to_m128i(b"Hello! Good-Bye!");
|
||||
let b = str_to_m128i(b"hello! good-bye!");
|
||||
|
||||
let i = _mm_cmpistrm::<0>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi32(0b11101111_01111110, 0, 0, 0);
|
||||
assert_eq_m128i(i, res);
|
||||
|
||||
let i = _mm_cmpistrm::<_SIDD_MASKED_NEGATIVE_POLARITY>(a, b);
|
||||
#[rustfmt::skip]
|
||||
let res = _mm_setr_epi32(0b00010000_10000001, 0, 0, 0);
|
||||
assert_eq_m128i(i, res);
|
||||
}
|
||||
test_bitmask();
|
||||
}
|
||||
|
||||
#[track_caller]
|
||||
#[target_feature(enable = "sse2")]
|
||||
pub unsafe fn assert_eq_m128i(a: __m128i, b: __m128i) {
|
||||
assert_eq!(transmute::<_, [u64; 2]>(a), transmute::<_, [u64; 2]>(b))
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue