99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <wchar.h>
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#define fplog 0
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#include <math.h>
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#define HAVE_STDARG_H
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#include "../86box.h"
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#include "cpu.h"
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#include "../mem.h"
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#include "../pic.h"
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#include "x86.h"
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#include "x86_flags.h"
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#include "x86_ops.h"
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#include "x87.h"
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#include "386_common.h"
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#ifdef ENABLE_FPU_LOG
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int fpu_do_log = ENABLE_FPU_LOG;
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static void
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fpu_log(const char *fmt, ...)
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{
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va_list ap;
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if (fpu_log) {
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va_start(ap, fmt);
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pclog_ex(fmt, ap);
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va_end(ap);
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}
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}
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#else
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#define fpu_log(fmt, ...)
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#endif
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#define X87_TAG_VALID 0
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#define X87_TAG_ZERO 1
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#define X87_TAG_INVALID 2
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#define X87_TAG_EMPTY 3
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uint16_t x87_gettag()
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{
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uint16_t ret = 0;
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int c;
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for (c = 0; c < 8; c++)
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{
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if (cpu_state.tag[c] == TAG_EMPTY)
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ret |= X87_TAG_EMPTY << (c * 2);
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else if (cpu_state.tag[c] & TAG_UINT64)
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ret |= 2 << (c*2);
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else if (cpu_state.ST[c] == 0.0 && !cpu_state.ismmx)
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ret |= X87_TAG_ZERO << (c * 2);
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else
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ret |= X87_TAG_VALID << (c * 2);
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}
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return ret;
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}
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void x87_settag(uint16_t new_tag)
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{
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int c;
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for (c = 0; c < 8; c++)
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{
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int tag = (new_tag >> (c * 2)) & 3;
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if (tag == X87_TAG_EMPTY)
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cpu_state.tag[c] = TAG_EMPTY;
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else if (tag == 2)
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cpu_state.tag[c] = TAG_VALID | TAG_UINT64;
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else
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cpu_state.tag[c] = TAG_VALID;
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}
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}
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#ifdef ENABLE_808X_LOG
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void x87_dumpregs()
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{
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if (cpu_state.ismmx)
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{
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fpu_log("MM0=%016llX\tMM1=%016llX\tMM2=%016llX\tMM3=%016llX\n", cpu_state.MM[0].q, cpu_state.MM[1].q, cpu_state.MM[2].q, cpu_state.MM[3].q);
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fpu_log("MM4=%016llX\tMM5=%016llX\tMM6=%016llX\tMM7=%016llX\n", cpu_state.MM[4].q, cpu_state.MM[5].q, cpu_state.MM[6].q, cpu_state.MM[7].q);
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}
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else
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{
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fpu_log("ST(0)=%f\tST(1)=%f\tST(2)=%f\tST(3)=%f\t\n",cpu_state.ST[cpu_state.TOP],cpu_state.ST[(cpu_state.TOP+1)&7],cpu_state.ST[(cpu_state.TOP+2)&7],cpu_state.ST[(cpu_state.TOP+3)&7]);
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fpu_log("ST(4)=%f\tST(5)=%f\tST(6)=%f\tST(7)=%f\t\n",cpu_state.ST[(cpu_state.TOP+4)&7],cpu_state.ST[(cpu_state.TOP+5)&7],cpu_state.ST[(cpu_state.TOP+6)&7],cpu_state.ST[(cpu_state.TOP+7)&7]);
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}
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fpu_log("Status = %04X Control = %04X Tag = %04X\n", cpu_state.npxs, cpu_state.npxc, x87_gettag());
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}
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#endif
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