feat(asm): encode indirect JMP and CALL on all four architectures

Assisted-by: GLM 5.3 Flash

verify/trampoline_loong64.s

@@ -6,7 +6,7 @@
 // ABI0 JIT trampoline for LoongArch 64.
 //
 // enterJIT saves Go SP and RA (R1), switches to the prepared stack, and
-// jumps to the JIT function.  When the function RETs (JIRL zero, ra, 0),
+// jumps to the JIT function.  When the function RETs (JMP (R1), the toolchain's spelling for jirl zero, ra, 0),
 // control lands in leaveJIT.
 
 // func enterJIT(fn uintptr, stack uintptr)
@@ -19,14 +19,14 @@ TEXT ·enterJIT(SB), NOSPLIT, $0-16
 	MOVV R5, R3 // switch to the prepared stack: SP stays on
 	// the leave slot, so the kernel reads its
 	// first argument at SP+8
-	JIRL R0, R4, 0 // jump to JIT function
+	JMP  (R4) // jump to JIT function
 
 	// func leaveJIT()
 TEXT ·leaveJIT(SB), NOSPLIT, $0-0
 	MOVV savedSP(SB), R5 // restore Go stack pointer
 	MOVV R5, R3 // restore SP
 	MOVV savedRA(SB), R1 // restore return address
-	JIRL R0, R1, 0 // return to Go caller
+	JMP  (R1) // return to Go caller
 
 GLOBL savedRA(SB), NOPTR, $8