Implement frndint

mehfooz09 · Oct 30, 2018 · c10fac1 · c10fac1
1 parent 5c592c4
commit c10fac1
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Showing 5 changed files with 11 additions and 0 deletions.
diff --git a/emu/decode.h b/emu/decode.h
@@ -608,6 +608,7 @@ __no_instrument DECODER_RET glue(DECODER_NAME, OP_SIZE)(DECODER_ARGS) {
                     case 0xd950: TRACE("fld1"); FLDC(one); break;
                     case 0xd956: TRACE("fldz"); FLDC(zero); break;
                     case 0xd970: TRACE("fprem"); FPREM(); break;
+                    case 0xd974: TRACE("frndint"); FRNDINT(); break;
                     case 0xdf40: TRACE("fnstsw ax"); FSTSW(reg_a); break;
                     default: TRACE("undefined"); UNDEFINED;
                 }}

diff --git a/emu/fpu.c b/emu/fpu.c
@@ -85,6 +85,12 @@ void fpu_prem(struct cpu_state *cpu) {
     ST(0) = f80_mod(ST(0), ST(1));
 }
 
+void fpu_rndint(struct cpu_state *cpu) {
+    if (f80_isinf(ST(0)) || f80_isnan(ST(0)))
+        return;
+    ST(0) = f80_from_int(f80_to_int(ST(0)));
+}
+
 void fpu_ucom(struct cpu_state *cpu, int i) {
     cpu->c1 = 0;
     cpu->c0 = f80_lt(ST(0), ST(i));

diff --git a/emu/fpu.h b/emu/fpu.h
@@ -29,6 +29,7 @@ void fpu_ldm64(struct cpu_state *cpu, double *f);
 void fpu_ldm80(struct cpu_state *cpu, float80 *f);
 
 void fpu_prem(struct cpu_state *cpu);
+void fpu_rndint(struct cpu_state *cpu);
 void fpu_ucom(struct cpu_state *cpu, int i);
 void fpu_abs(struct cpu_state *cpu);
 void fpu_chs(struct cpu_state *cpu);

diff --git a/emu/interp/fpu.h b/emu/interp/fpu.h
@@ -76,6 +76,8 @@
 #define FPREM() \
     ST(0) = f80_mod(ST(0), ST(1))
 
+#define FRNDINT() UNDEFINED
+
 #define FUCOMI() \
     cpu->zf = f80_eq(ST(0), ST_i); \
     cpu->cf = f80_lt(ST(0), ST_i); \

diff --git a/jit/gen.c b/jit/gen.c
@@ -357,6 +357,7 @@ static inline bool gen_op(struct gen_state *state, gadget_t *gadgets, enum arg a
 #define FABS() h(fpu_abs)
 #define FLDC(what) hh(fpu_ldc, fconst_##what)
 #define FPREM() h(fpu_prem)
+#define FRNDINT() h(fpu_rndint)
 #define FSTSW(dst) if (arg_##dst == arg_reg_a) g(fstsw_ax); else UNDEFINED
 #define FSTCW(dst) if (arg_##dst == arg_reg_a) UNDEFINED; else h_write(fpu_stcw, 16)
 #define FLDCW(dst) if (arg_##dst == arg_reg_a) UNDEFINED; else h_read(fpu_ldcw, 16)