[llvm] [LangRef] Fix examples for float to int saturating intrinsics (PR #115629)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-ir

Author: Will (williamfedele)

<details>
<summary>Changes</summary>

See #<!-- -->113529 for raised issue.

As per the [LangRef:Simple Constants](https://llvm.org/docs/LangRef.html#simple-constants), exact decimal values of floating-point constants are required. For instance, 23.9 is a repeating decimal in binary and results in the reported error.

https://godbolt.org/z/1h7ETPnf6

---
Full diff: https://github.com/llvm/llvm-project/pull/115629.diff


1 Files Affected:

- (modified) llvm/docs/LangRef.rst (+4-4) 


``````````diff
diff --git a/llvm/docs/LangRef.rst b/llvm/docs/LangRef.rst
index e426140f328315..8fe4b1bd40e215 100644
--- a/llvm/docs/LangRef.rst
+++ b/llvm/docs/LangRef.rst
@@ -20392,8 +20392,8 @@ Example:
 
 .. code-block:: text
 
-      %a = call i8 @llvm.fptoui.sat.i8.f32(float 123.9)              ; yields i8: 123
-      %b = call i8 @llvm.fptoui.sat.i8.f32(float -5.7)               ; yields i8:   0
+      %a = call i8 @llvm.fptoui.sat.i8.f32(float 123.875)            ; yields i8: 123
+      %b = call i8 @llvm.fptoui.sat.i8.f32(float -5.75)              ; yields i8:   0
       %c = call i8 @llvm.fptoui.sat.i8.f32(float 377.0)              ; yields i8: 255
       %d = call i8 @llvm.fptoui.sat.i8.f32(float 0xFFF8000000000000) ; yields i8:   0
 
@@ -20445,8 +20445,8 @@ Example:
 
 .. code-block:: text
 
-      %a = call i8 @llvm.fptosi.sat.i8.f32(float 23.9)               ; yields i8:   23
-      %b = call i8 @llvm.fptosi.sat.i8.f32(float -130.8)             ; yields i8: -128
+      %a = call i8 @llvm.fptosi.sat.i8.f32(float 23.875)             ; yields i8:   23
+      %b = call i8 @llvm.fptosi.sat.i8.f32(float -130.75)            ; yields i8: -128
       %c = call i8 @llvm.fptosi.sat.i8.f32(float 999.0)              ; yields i8:  127
       %d = call i8 @llvm.fptosi.sat.i8.f32(float 0xFFF8000000000000) ; yields i8:    0
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/115629