diff --git a/src/codegen_ops.c b/src/codegen_ops.c
index 347a32e..a2d6fb1 100644
--- a/src/codegen_ops.c
+++ b/src/codegen_ops.c
@@ -178,7 +178,7 @@ RecompOpFn recomp_opcodes_d9[512] =
 
 /*c0*/  ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,
 /*d0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,
-/*e0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,
+/*e0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           ropFLD1,        NULL,           NULL,           NULL,           NULL,           NULL,           ropFLDZ,        NULL,
 /*f0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,
 
         /*32-bit data*/
@@ -200,7 +200,7 @@ RecompOpFn recomp_opcodes_d9[512] =
 
 /*c0*/  ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFLD,         ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,        ropFXCH,
 /*d0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,        ropFSTP,
-/*e0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,
+/*e0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           ropFLD1,        NULL,           NULL,           NULL,           NULL,           NULL,           ropFLDZ,        NULL,
 /*f0*/  NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,           NULL,
 };
 
diff --git a/src/codegen_ops_fpu_constant.c b/src/codegen_ops_fpu_constant.c
new file mode 100644
index 0000000..187850c
--- /dev/null
+++ b/src/codegen_ops_fpu_constant.c
@@ -0,0 +1,33 @@
+#include "ibm.h"
+
+#include "x86.h"
+#include "x86_flags.h"
+#include "386_common.h"
+#include "x87.h"
+#include "codegen.h"
+#include "codegen_accumulate.h"
+#include "codegen_ir.h"
+#include "codegen_ops.h"
+#include "codegen_ops_fpu_constant.h"
+#include "codegen_ops_helpers.h"
+
+uint32_t ropFLD1(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
+{
+        uop_FP_ENTER(ir);
+        uop_MOV_IMM(ir, IREG_temp0, 1);
+        uop_MOV_DOUBLE_INT(ir, IREG_ST(-1), IREG_temp0);
+        uop_MOV_IMM(ir, IREG_tag(-1), TAG_VALID);
+        fpu_PUSH(ir);
+
+        return op_pc;
+}
+uint32_t ropFLDZ(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
+{
+        uop_FP_ENTER(ir);
+        uop_MOV_IMM(ir, IREG_temp0, 0);
+        uop_MOV_DOUBLE_INT(ir, IREG_ST(-1), IREG_temp0);
+        uop_MOV_IMM(ir, IREG_tag(-1), TAG_VALID);
+        fpu_PUSH(ir);
+        
+        return op_pc;
+}
diff --git a/src/codegen_ops_fpu_constant.h b/src/codegen_ops_fpu_constant.h
new file mode 100644
index 0000000..29384b5
--- /dev/null
+++ b/src/codegen_ops_fpu_constant.h
@@ -0,0 +1,2 @@
+uint32_t ropFLD1(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc);
+uint32_t ropFLDZ(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc);