Fall back to interpreter version of FADD if x87 rounding mode is not nearest. Fixes software rendering in Battlezone.

2019-05-11 11:45:08 +01:00 · 2019-05-11 11:45:08 +01:00 · 451e80a333
commit 451e80a333
parent 83f2869123
1 changed files with 2 additions and 0 deletions
--- a/src/codegen_ops_fpu_arith.c
+++ b/src/codegen_ops_fpu_arith.c
@ -274,6 +274,8 @@ uint32_t ropFADD ## name(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint
 {                                                                                                                               \
        x86seg *target_seg;                                                                                                     \
                                                                                                                                \
+        if ((cpu_state.npxc >> 10) & 3)                                                                                         \
+                return 0;                                                                                                       \
        uop_FP_ENTER(ir);                                                                                                       \
        uop_MOV_IMM(ir, IREG_oldpc, cpu_state.oldpc);                                                                           \
        op_pc--;                                                                                                                \