forked from rust-lang/rust
-
Notifications
You must be signed in to change notification settings - Fork 7
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Auto merge of rust-lang#116307 - RalfJung:miri, r=RalfJung
Miri subtree update r? `@ghost`
- Loading branch information
Showing
15 changed files
with
855 additions
and
35 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| 2ba4eb2d49e774b5fbc2a06258ac7b0f60b92b7e | ||
| bb6c66be3793ac5c738eeac91ecdc4b99388d0b4 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| use rustc_middle::mir; | ||
| use rustc_span::Symbol; | ||
| use rustc_target::abi::Align; | ||
| use rustc_target::spec::abi::Abi; | ||
|
|
||
| use super::horizontal_bin_op; | ||
| use crate::*; | ||
| use shims::foreign_items::EmulateByNameResult; | ||
|
|
||
| impl<'mir, 'tcx: 'mir> EvalContextExt<'mir, 'tcx> for crate::MiriInterpCx<'mir, 'tcx> {} | ||
| pub(super) trait EvalContextExt<'mir, 'tcx: 'mir>: | ||
| crate::MiriInterpCxExt<'mir, 'tcx> | ||
| { | ||
| fn emulate_x86_sse3_intrinsic( | ||
| &mut self, | ||
| link_name: Symbol, | ||
| abi: Abi, | ||
| args: &[OpTy<'tcx, Provenance>], | ||
| dest: &PlaceTy<'tcx, Provenance>, | ||
| ) -> InterpResult<'tcx, EmulateByNameResult<'mir, 'tcx>> { | ||
| let this = self.eval_context_mut(); | ||
| // Prefix should have already been checked. | ||
| let unprefixed_name = link_name.as_str().strip_prefix("llvm.x86.sse3.").unwrap(); | ||
|
|
||
| match unprefixed_name { | ||
| // Used to implement the _mm_addsub_ps and _mm_addsub_pd functions. | ||
| // Alternatingly add and subtract floating point (f32 or f64) from | ||
| // `left` and `right` | ||
| "addsub.ps" | "addsub.pd" => { | ||
| let [left, right] = | ||
| this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?; | ||
|
|
||
| let (left, left_len) = this.operand_to_simd(left)?; | ||
| let (right, right_len) = this.operand_to_simd(right)?; | ||
| let (dest, dest_len) = this.place_to_simd(dest)?; | ||
|
|
||
| assert_eq!(dest_len, left_len); | ||
| assert_eq!(dest_len, right_len); | ||
|
|
||
| for i in 0..dest_len { | ||
| let left = this.read_immediate(&this.project_index(&left, i)?)?; | ||
| let right = this.read_immediate(&this.project_index(&right, i)?)?; | ||
| let dest = this.project_index(&dest, i)?; | ||
|
|
||
| // Even elements are subtracted and odd elements are added. | ||
| let op = if i % 2 == 0 { mir::BinOp::Sub } else { mir::BinOp::Add }; | ||
| let res = this.wrapping_binary_op(op, &left, &right)?; | ||
|
|
||
| this.write_immediate(*res, &dest)?; | ||
| } | ||
| } | ||
| // Used to implement the _mm_h{add,sub}_p{s,d} functions. | ||
| // Horizontally add/subtract adjacent floating point values | ||
| // in `left` and `right`. | ||
| "hadd.ps" | "hadd.pd" | "hsub.ps" | "hsub.pd" => { | ||
| let [left, right] = | ||
| this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?; | ||
|
|
||
| let which = match unprefixed_name { | ||
| "hadd.ps" | "hadd.pd" => mir::BinOp::Add, | ||
| "hsub.ps" | "hsub.pd" => mir::BinOp::Sub, | ||
| _ => unreachable!(), | ||
| }; | ||
|
|
||
| horizontal_bin_op(this, which, /*saturating*/ false, left, right, dest)?; | ||
| } | ||
| // Used to implement the _mm_lddqu_si128 function. | ||
| // Reads a 128-bit vector from an unaligned pointer. This intrinsic | ||
| // is expected to perform better than a regular unaligned read when | ||
| // the data crosses a cache line, but for Miri this is just a regular | ||
| // unaligned read. | ||
| "ldu.dq" => { | ||
| let [src_ptr] = this.check_shim(abi, Abi::C { unwind: false }, link_name, args)?; | ||
| let src_ptr = this.read_pointer(src_ptr)?; | ||
| let dest = dest.force_mplace(this)?; | ||
|
|
||
| this.mem_copy( | ||
| src_ptr, | ||
| Align::ONE, | ||
| dest.ptr(), | ||
| Align::ONE, | ||
| dest.layout.size, | ||
| /*nonoverlapping*/ true, | ||
| )?; | ||
| } | ||
| _ => return Ok(EmulateByNameResult::NotSupported), | ||
| } | ||
| Ok(EmulateByNameResult::NeedsJumping) | ||
| } | ||
| } |
Oops, something went wrong.