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Implement fabs/fchs

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This commit is contained in:
Theodore Dubois 2018-10-08 15:25:45 -07:00
parent 89ad262fd8
commit c4837720ff
3 changed files with 12 additions and 2 deletions
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8
emu/fpu.c
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@ -93,6 +93,14 @@ void fpu_ucom(struct cpu_state *cpu, int i) {
cpu->c0 = cpu->c2 = cpu->c3 = 1;
}
void fpu_abs(struct cpu_state *cpu) {
ST(0) = f80_abs(ST(0));
}
void fpu_chs(struct cpu_state *cpu) {
ST(0) = f80_neg(ST(0));
}
void fpu_add(struct cpu_state *cpu, int srci, int dsti) {
ST(dsti) = f80_add(ST(srci), ST(dsti));
}

2
emu/fpu.h
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@ -30,6 +30,8 @@ void fpu_ldm80(struct cpu_state *cpu, float80 *f);
void fpu_prem(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);
void fpu_add(struct cpu_state *cpu, int srci, int dsti);
void fpu_sub(struct cpu_state *cpu, int srci, int dsti);

4
jit/gen.c
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@ -339,8 +339,8 @@ static inline bool gen_op(struct gen_state *state, gadget_t *gadgets, enum arg a
#define FUCOM() hh(fpu_ucom, st_i)
#define FUCOMI() UNDEFINED
#define FST() hh(fpu_st, st_i)
#define FCHS() UNDEFINED
#define FABS() UNDEFINED
#define FCHS() h(fpu_chs)
#define FABS() h(fpu_abs)
#define FLDC(what) hh(fpu_ldc, fconst_##what)
#define FPREM() h(fpu_prem)
#define FSTSW(dst) if (arg_##dst == arg_reg_a) g(fstsw_ax); else UNDEFINED