diff --git a/crates/xenia-cpu/src/interpreter.rs b/crates/xenia-cpu/src/interpreter.rs
index 9795ac8..c22cd0b 100644
--- a/crates/xenia-cpu/src/interpreter.rs
+++ b/crates/xenia-cpu/src/interpreter.rs
@@ -1464,7 +1464,12 @@ fn execute(ctx: &mut PpcContext, mem: &dyn MemoryAccess, instr: &DecodedInstr) -
             let mut rs = instr.rs();
             let mut bytes_left = nb;
             if let Some(t) = ctx.reservation_table.as_ref().filter(|t| t.is_enabled()) {
-                if t.has_active_reservers() { t.invalidate_for_write(ea); }
+                if t.has_active_reservers() {
+                    let first_line = ea & !RESERVATION_MASK;
+                    let last_line = ea.wrapping_add(nb - 1) & !RESERVATION_MASK;
+                    t.invalidate_for_write(first_line);
+                    if last_line != first_line { t.invalidate_for_write(last_line); }
+                }
             }
             while bytes_left > 0 {
                 let val = ctx.gpr[rs] as u32;
@@ -1600,6 +1605,9 @@ fn execute(ctx: &mut PpcContext, mem: &dyn MemoryAccess, instr: &DecodedInstr) -
             // Zero 32 bytes at effective address
             let ea = if instr.ra() == 0 { 0u64 } else { ctx.gpr[instr.ra()] };
             let ea = (ea.wrapping_add(ctx.gpr[instr.rb()]) as u32) & !31;
+            if let Some(t) = ctx.reservation_table.as_ref().filter(|t| t.is_enabled()) {
+                if t.has_active_reservers() { t.invalidate_for_write(ea); }
+            }
             for i in 0..8 {
                 mem.write_u32(ea + i * 4, 0);
             }
@@ -1609,6 +1617,9 @@ fn execute(ctx: &mut PpcContext, mem: &dyn MemoryAccess, instr: &DecodedInstr) -
             // Zero 128 bytes
             let ea = if instr.ra() == 0 { 0u64 } else { ctx.gpr[instr.ra()] };
             let ea = (ea.wrapping_add(ctx.gpr[instr.rb()]) as u32) & !127;
+            if let Some(t) = ctx.reservation_table.as_ref().filter(|t| t.is_enabled()) {
+                if t.has_active_reservers() { t.invalidate_for_write(ea); }
+            }
             for i in 0..32 {
                 mem.write_u32(ea + i * 4, 0);
             }
@@ -4418,8 +4429,15 @@ fn execute(ctx: &mut PpcContext, mem: &dyn MemoryAccess, instr: &DecodedInstr) -
             let nb = ctx.xer() & 0x7F;
             let mut rs = instr.rs();
             let mut bytes_left = nb;
-            if let Some(t) = ctx.reservation_table.as_ref().filter(|t| t.is_enabled()) {
-                if t.has_active_reservers() { t.invalidate_for_write(ea); }
+            if nb > 0 {
+                if let Some(t) = ctx.reservation_table.as_ref().filter(|t| t.is_enabled()) {
+                    if t.has_active_reservers() {
+                        let first_line = ea & !RESERVATION_MASK;
+                        let last_line = ea.wrapping_add(nb - 1) & !RESERVATION_MASK;
+                        t.invalidate_for_write(first_line);
+                        if last_line != first_line { t.invalidate_for_write(last_line); }
+                    }
+                }
             }
             while bytes_left > 0 {
                 let val = ctx.gpr[rs] as u32;