#include "exec/helper-proto.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
-#include "fpu/softfloat.h"
+#include "softfloat.h"
/* Undefined offsets may be different on various FPU.
* On 68040 they return 0.0 (floatx80_zero)
{
return fmovem_postinc(env, addr, mask, cpu_ld_float64_ra);
}
+
+static void make_quotient(CPUM68KState *env, floatx80 val)
+{
+ int32_t quotient;
+ int sign;
+
+ if (floatx80_is_any_nan(val)) {
+ return;
+ }
+
+ quotient = floatx80_to_int32(val, &env->fp_status);
+ sign = quotient < 0;
+ if (sign) {
+ quotient = -quotient;
+ }
+
+ quotient = (sign << 7) | (quotient & 0x7f);
+ env->fpsr = (env->fpsr & ~FPSR_QT_MASK) | (quotient << FPSR_QT_SHIFT);
+}
+
+void HELPER(fmod)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
+{
+ res->d = floatx80_mod(val1->d, val0->d, &env->fp_status);
+
+ make_quotient(env, res->d);
+}
+
+void HELPER(frem)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
+{
+ res->d = floatx80_rem(val1->d, val0->d, &env->fp_status);
+
+ make_quotient(env, res->d);
+}
DEF_HELPER_3(fmovemd_st_predec, i32, env, i32, i32)
DEF_HELPER_3(fmovemd_st_postinc, i32, env, i32, i32)
DEF_HELPER_3(fmovemd_ld_postinc, i32, env, i32, i32)
+DEF_HELPER_4(fmod, void, env, fp, fp, fp)
+DEF_HELPER_4(frem, void, env, fp, fp, fp)
DEF_HELPER_3(mac_move, void, env, i32, i32)
DEF_HELPER_3(macmulf, i64, env, i32, i32)
--- /dev/null
+/*
+ * Ported from a work by Andreas Grabher for Previous, NeXT Computer Emulator,
+ * derived from NetBSD M68040 FPSP functions,
+ * derived from release 2a of the SoftFloat IEC/IEEE Floating-point Arithmetic
+ * Package. Those parts of the code (and some later contributions) are
+ * provided under that license, as detailed below.
+ * It has subsequently been modified by contributors to the QEMU Project,
+ * so some portions are provided under:
+ * the SoftFloat-2a license
+ * the BSD license
+ * GPL-v2-or-later
+ *
+ * Any future contributions to this file will be taken to be licensed under
+ * the Softfloat-2a license unless specifically indicated otherwise.
+ */
+
+/* Portions of this work are licensed under the terms of the GNU GPL,
+ * version 2 or later. See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "softfloat.h"
+#include "fpu/softfloat-macros.h"
+
+/*----------------------------------------------------------------------------
+ | Returns the modulo remainder of the extended double-precision floating-point
+ | value `a' with respect to the corresponding value `b'.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status)
+{
+ flag aSign, zSign;
+ int32_t aExp, bExp, expDiff;
+ uint64_t aSig0, aSig1, bSig;
+ uint64_t qTemp, term0, term1;
+
+ aSig0 = extractFloatx80Frac(a);
+ aExp = extractFloatx80Exp(a);
+ aSign = extractFloatx80Sign(a);
+ bSig = extractFloatx80Frac(b);
+ bExp = extractFloatx80Exp(b);
+
+ if (aExp == 0x7FFF) {
+ if ((uint64_t) (aSig0 << 1)
+ || ((bExp == 0x7FFF) && (uint64_t) (bSig << 1))) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ goto invalid;
+ }
+ if (bExp == 0x7FFF) {
+ if ((uint64_t) (bSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ return a;
+ }
+ if (bExp == 0) {
+ if (bSig == 0) {
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ normalizeFloatx80Subnormal(bSig, &bExp, &bSig);
+ }
+ if (aExp == 0) {
+ if ((uint64_t) (aSig0 << 1) == 0) {
+ return a;
+ }
+ normalizeFloatx80Subnormal(aSig0, &aExp, &aSig0);
+ }
+ bSig |= LIT64(0x8000000000000000);
+ zSign = aSign;
+ expDiff = aExp - bExp;
+ aSig1 = 0;
+ if (expDiff < 0) {
+ return a;
+ }
+ qTemp = (bSig <= aSig0);
+ if (qTemp) {
+ aSig0 -= bSig;
+ }
+ expDiff -= 64;
+ while (0 < expDiff) {
+ qTemp = estimateDiv128To64(aSig0, aSig1, bSig);
+ qTemp = (2 < qTemp) ? qTemp - 2 : 0;
+ mul64To128(bSig, qTemp, &term0, &term1);
+ sub128(aSig0, aSig1, term0, term1, &aSig0, &aSig1);
+ shortShift128Left(aSig0, aSig1, 62, &aSig0, &aSig1);
+ }
+ expDiff += 64;
+ if (0 < expDiff) {
+ qTemp = estimateDiv128To64(aSig0, aSig1, bSig);
+ qTemp = (2 < qTemp) ? qTemp - 2 : 0;
+ qTemp >>= 64 - expDiff;
+ mul64To128(bSig, qTemp << (64 - expDiff), &term0, &term1);
+ sub128(aSig0, aSig1, term0, term1, &aSig0, &aSig1);
+ shortShift128Left(0, bSig, 64 - expDiff, &term0, &term1);
+ while (le128(term0, term1, aSig0, aSig1)) {
+ ++qTemp;
+ sub128(aSig0, aSig1, term0, term1, &aSig0, &aSig1);
+ }
+ }
+ return
+ normalizeRoundAndPackFloatx80(
+ 80, zSign, bExp + expDiff, aSig0, aSig1, status);
+}
--- /dev/null
+/*
+ * Ported from a work by Andreas Grabher for Previous, NeXT Computer Emulator,
+ * derived from NetBSD M68040 FPSP functions,
+ * derived from release 2a of the SoftFloat IEC/IEEE Floating-point Arithmetic
+ * Package. Those parts of the code (and some later contributions) are
+ * provided under that license, as detailed below.
+ * It has subsequently been modified by contributors to the QEMU Project,
+ * so some portions are provided under:
+ * the SoftFloat-2a license
+ * the BSD license
+ * GPL-v2-or-later
+ *
+ * Any future contributions to this file will be taken to be licensed under
+ * the Softfloat-2a license unless specifically indicated otherwise.
+ */
+
+/* Portions of this work are licensed under the terms of the GNU GPL,
+ * version 2 or later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef TARGET_M68K_SOFTFLOAT_H
+#define TARGET_M68K_SOFTFLOAT_H
+#include "fpu/softfloat.h"
+
+floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status);
+#endif
projects / qemu.git / commitdiff