[clrinterp] Add support for ldc.r4, ldc.r8, ldc.i8 and ldstr

[BrzVlad]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for new IL instructions (ldc.r4, ldc.r8, ldc.i8, and ldstr) by updating the interpreter and compiler as well as extending test coverage.

• Implements new opcode cases in the interpreter and compiler for handling floating point and 64‐bit integers.
• Adds enum values for new instruction types.
• Introduces a new test (TestFloat) to verify the correct handling of floating point operations.

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
src/tests/JIT/interpreter/Interpreter.cs	Adds a new TestFloat to check floating point operation accuracy
src/coreclr/vm/interpexec.cpp	Implements new IL opcode cases for ldc.i8, ldc.r4, and ldc.r8
src/coreclr/interpreter/intops.h	Updates opcode enum with new values for long int, float, and double
src/coreclr/interpreter/compiler.cpp	Handles code generation for new ldc instructions and updates PrintInsData

Files not reviewed (1)

• src/coreclr/interpreter/intops.def: Language not supported

Comments suppressed due to low confidence (1)

src/coreclr/interpreter/compiler.cpp:3112

• Replace the pointer cast with memcpy to copy the bits from i64 into a double variable for safe type punning when printing.

printf(" %g", *(double*)&i64);

[Copilot]

Consider using an absolute difference check (e.g., if (fabs(sum - 27098.3) > 0.001)) for clearer and more robust floating point comparisons.

Suggested change

	if ((sum - 27098.3) > 0.001 || (sum - 27098.3) < -0.001)
	if (Math.Abs(sum - 27098.3) > 0.001)

[janvorli]

LGTM, thank you!