fsubrp

evmar · Jun 6, 2024 · 787a7fe · 787a7fe
1 parent 8cd9666
commit 787a7fe
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/x86/src/ops/fpu.rs b/x86/src/ops/fpu.rs
@@ -230,12 +230,17 @@ pub fn fsubr_m32fp(cpu: &mut CPU, mem: Mem, instr: &Instruction) {
     *x = y - *x;
 }
 
-pub fn fsubr_st0_sti(cpu: &mut CPU, _mem: Mem, instr: &Instruction) {
+pub fn fsubr_sti_sti(cpu: &mut CPU, _mem: Mem, instr: &Instruction) {
     let y = *cpu.fpu.get(instr.op1_register());
-    let x = cpu.fpu.st0();
+    let x = cpu.fpu.get(instr.op0_register());
     *x = y - *x;
 }
 
+pub fn fsubrp_st0_sti(cpu: &mut CPU, mem: Mem, instr: &Instruction) {
+    fsubr_sti_sti(cpu, mem, instr);
+    cpu.fpu.pop();
+}
+
 pub fn fmul_m64fp(cpu: &mut CPU, mem: Mem, instr: &Instruction) {
     let y = mem.get_pod::<f64>(x86_addr(cpu, instr));
     *cpu.fpu.st0() *= y;

diff --git a/x86/src/ops/table.rs b/x86/src/ops/table.rs
@@ -378,7 +378,9 @@ pub unsafe fn init_op_tab() {
 
     OP_TAB[iced_x86::Code::Fsubr_m64fp as usize] = Some(fsubr_m64fp);
     OP_TAB[iced_x86::Code::Fsubr_m32fp as usize] = Some(fsubr_m32fp);
-    OP_TAB[iced_x86::Code::Fsubr_st0_sti as usize] = Some(fsubr_st0_sti);
+    OP_TAB[iced_x86::Code::Fsubr_st0_sti as usize] = Some(fsubr_sti_sti);
+    OP_TAB[iced_x86::Code::Fsubr_sti_st0 as usize] = Some(fsubr_sti_sti);
+    OP_TAB[iced_x86::Code::Fsubrp_sti_st0 as usize] = Some(fsubrp_st0_sti);
 
     OP_TAB[iced_x86::Code::Fmul_m64fp as usize] = Some(fmul_m64fp);
     OP_TAB[iced_x86::Code::Fmul_m32fp as usize] = Some(fmul_m32fp);