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-rw-r--r--target/m68k/softfloat.c247
1 files changed, 247 insertions, 0 deletions
diff --git a/target/m68k/softfloat.c b/target/m68k/softfloat.c
index 488dbc522b..6fb9665336 100644
--- a/target/m68k/softfloat.c
+++ b/target/m68k/softfloat.c
@@ -1476,3 +1476,250 @@ floatx80 floatx80_tan(floatx80 a, float_status *status)
}
}
}
+
+/*----------------------------------------------------------------------------
+ | Sine
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_sin(floatx80 a, float_status *status)
+{
+ flag aSign, xSign;
+ int32_t aExp, xExp;
+ uint64_t aSig, xSig;
+
+ int8_t user_rnd_mode, user_rnd_prec;
+
+ int32_t compact, l, n, j;
+ floatx80 fp0, fp1, fp2, fp3, fp4, fp5, x, invtwopi, twopi1, twopi2;
+ float32 posneg1, twoto63;
+ flag adjn, endflag;
+
+ aSig = extractFloatx80Frac(a);
+ aExp = extractFloatx80Exp(a);
+ aSign = extractFloatx80Sign(a);
+
+ if (aExp == 0x7FFF) {
+ if ((uint64_t) (aSig << 1)) {
+ return propagateFloatx80NaNOneArg(a, status);
+ }
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+
+ if (aExp == 0 && aSig == 0) {
+ return packFloatx80(aSign, 0, 0);
+ }
+
+ adjn = 0;
+
+ user_rnd_mode = status->float_rounding_mode;
+ user_rnd_prec = status->floatx80_rounding_precision;
+ status->float_rounding_mode = float_round_nearest_even;
+ status->floatx80_rounding_precision = 80;
+
+ compact = floatx80_make_compact(aExp, aSig);
+
+ fp0 = a;
+
+ if (compact < 0x3FD78000 || compact > 0x4004BC7E) {
+ /* 2^(-40) > |X| > 15 PI */
+ if (compact > 0x3FFF8000) { /* |X| >= 15 PI */
+ /* REDUCEX */
+ fp1 = packFloatx80(0, 0, 0);
+ if (compact == 0x7FFEFFFF) {
+ twopi1 = packFloatx80(aSign ^ 1, 0x7FFE,
+ LIT64(0xC90FDAA200000000));
+ twopi2 = packFloatx80(aSign ^ 1, 0x7FDC,
+ LIT64(0x85A308D300000000));
+ fp0 = floatx80_add(fp0, twopi1, status);
+ fp1 = fp0;
+ fp0 = floatx80_add(fp0, twopi2, status);
+ fp1 = floatx80_sub(fp1, fp0, status);
+ fp1 = floatx80_add(fp1, twopi2, status);
+ }
+ loop:
+ xSign = extractFloatx80Sign(fp0);
+ xExp = extractFloatx80Exp(fp0);
+ xExp -= 0x3FFF;
+ if (xExp <= 28) {
+ l = 0;
+ endflag = 1;
+ } else {
+ l = xExp - 27;
+ endflag = 0;
+ }
+ invtwopi = packFloatx80(0, 0x3FFE - l,
+ LIT64(0xA2F9836E4E44152A)); /* INVTWOPI */
+ twopi1 = packFloatx80(0, 0x3FFF + l, LIT64(0xC90FDAA200000000));
+ twopi2 = packFloatx80(0, 0x3FDD + l, LIT64(0x85A308D300000000));
+
+ /* SIGN(INARG)*2^63 IN SGL */
+ twoto63 = packFloat32(xSign, 0xBE, 0);
+
+ fp2 = floatx80_mul(fp0, invtwopi, status);
+ fp2 = floatx80_add(fp2, float32_to_floatx80(twoto63, status),
+ status); /* THE FRACT PART OF FP2 IS ROUNDED */
+ fp2 = floatx80_sub(fp2, float32_to_floatx80(twoto63, status),
+ status); /* FP2 is N */
+ fp4 = floatx80_mul(twopi1, fp2, status); /* W = N*P1 */
+ fp5 = floatx80_mul(twopi2, fp2, status); /* w = N*P2 */
+ fp3 = floatx80_add(fp4, fp5, status); /* FP3 is P */
+ fp4 = floatx80_sub(fp4, fp3, status); /* W-P */
+ fp0 = floatx80_sub(fp0, fp3, status); /* FP0 is A := R - P */
+ fp4 = floatx80_add(fp4, fp5, status); /* FP4 is p = (W-P)+w */
+ fp3 = fp0; /* FP3 is A */
+ fp1 = floatx80_sub(fp1, fp4, status); /* FP1 is a := r - p */
+ fp0 = floatx80_add(fp0, fp1, status); /* FP0 is R := A+a */
+
+ if (endflag > 0) {
+ n = floatx80_to_int32(fp2, status);
+ goto sincont;
+ }
+ fp3 = floatx80_sub(fp3, fp0, status); /* A-R */
+ fp1 = floatx80_add(fp1, fp3, status); /* FP1 is r := (A-R)+a */
+ goto loop;
+ } else {
+ /* SINSM */
+ fp0 = float32_to_floatx80(make_float32(0x3F800000),
+ status); /* 1 */
+
+ status->float_rounding_mode = user_rnd_mode;
+ status->floatx80_rounding_precision = user_rnd_prec;
+
+ if (adjn) {
+ /* COSTINY */
+ a = floatx80_sub(fp0, float32_to_floatx80(
+ make_float32(0x00800000), status), status);
+ } else {
+ /* SINTINY */
+ a = floatx80_move(a, status);
+ }
+ float_raise(float_flag_inexact, status);
+
+ return a;
+ }
+ } else {
+ fp1 = floatx80_mul(fp0, float64_to_floatx80(
+ make_float64(0x3FE45F306DC9C883), status),
+ status); /* X*2/PI */
+
+ n = floatx80_to_int32(fp1, status);
+ j = 32 + n;
+
+ fp0 = floatx80_sub(fp0, pi_tbl[j], status); /* X-Y1 */
+ fp0 = floatx80_sub(fp0, float32_to_floatx80(pi_tbl2[j], status),
+ status); /* FP0 IS R = (X-Y1)-Y2 */
+
+ sincont:
+ if ((n + adjn) & 1) {
+ /* COSPOLY */
+ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
+ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */
+ fp2 = float64_to_floatx80(make_float64(0x3D2AC4D0D6011EE3),
+ status); /* B8 */
+ fp3 = float64_to_floatx80(make_float64(0xBDA9396F9F45AC19),
+ status); /* B7 */
+
+ xSign = extractFloatx80Sign(fp0); /* X IS S */
+ xExp = extractFloatx80Exp(fp0);
+ xSig = extractFloatx80Frac(fp0);
+
+ if (((n + adjn) >> 1) & 1) {
+ xSign ^= 1;
+ posneg1 = make_float32(0xBF800000); /* -1 */
+ } else {
+ xSign ^= 0;
+ posneg1 = make_float32(0x3F800000); /* 1 */
+ } /* X IS NOW R'= SGN*R */
+
+ fp2 = floatx80_mul(fp2, fp1, status); /* TB8 */
+ fp3 = floatx80_mul(fp3, fp1, status); /* TB7 */
+ fp2 = floatx80_add(fp2, float64_to_floatx80(
+ make_float64(0x3E21EED90612C972), status),
+ status); /* B6+TB8 */
+ fp3 = floatx80_add(fp3, float64_to_floatx80(
+ make_float64(0xBE927E4FB79D9FCF), status),
+ status); /* B5+TB7 */
+ fp2 = floatx80_mul(fp2, fp1, status); /* T(B6+TB8) */
+ fp3 = floatx80_mul(fp3, fp1, status); /* T(B5+TB7) */
+ fp2 = floatx80_add(fp2, float64_to_floatx80(
+ make_float64(0x3EFA01A01A01D423), status),
+ status); /* B4+T(B6+TB8) */
+ fp4 = packFloatx80(1, 0x3FF5, LIT64(0xB60B60B60B61D438));
+ fp3 = floatx80_add(fp3, fp4, status); /* B3+T(B5+TB7) */
+ fp2 = floatx80_mul(fp2, fp1, status); /* T(B4+T(B6+TB8)) */
+ fp1 = floatx80_mul(fp1, fp3, status); /* T(B3+T(B5+TB7)) */
+ fp4 = packFloatx80(0, 0x3FFA, LIT64(0xAAAAAAAAAAAAAB5E));
+ fp2 = floatx80_add(fp2, fp4, status); /* B2+T(B4+T(B6+TB8)) */
+ fp1 = floatx80_add(fp1, float32_to_floatx80(
+ make_float32(0xBF000000), status),
+ status); /* B1+T(B3+T(B5+TB7)) */
+ fp0 = floatx80_mul(fp0, fp2, status); /* S(B2+T(B4+T(B6+TB8))) */
+ fp0 = floatx80_add(fp0, fp1, status); /* [B1+T(B3+T(B5+TB7))]+
+ * [S(B2+T(B4+T(B6+TB8)))]
+ */
+
+ x = packFloatx80(xSign, xExp, xSig);
+ fp0 = floatx80_mul(fp0, x, status);
+
+ status->float_rounding_mode = user_rnd_mode;
+ status->floatx80_rounding_precision = user_rnd_prec;
+
+ a = floatx80_add(fp0, float32_to_floatx80(posneg1, status), status);
+
+ float_raise(float_flag_inexact, status);
+
+ return a;
+ } else {
+ /* SINPOLY */
+ xSign = extractFloatx80Sign(fp0); /* X IS R */
+ xExp = extractFloatx80Exp(fp0);
+ xSig = extractFloatx80Frac(fp0);
+
+ xSign ^= ((n + adjn) >> 1) & 1; /* X IS NOW R'= SGN*R */
+
+ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
+ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */
+ fp3 = float64_to_floatx80(make_float64(0xBD6AAA77CCC994F5),
+ status); /* A7 */
+ fp2 = float64_to_floatx80(make_float64(0x3DE612097AAE8DA1),
+ status); /* A6 */
+ fp3 = floatx80_mul(fp3, fp1, status); /* T*A7 */
+ fp2 = floatx80_mul(fp2, fp1, status); /* T*A6 */
+ fp3 = floatx80_add(fp3, float64_to_floatx80(
+ make_float64(0xBE5AE6452A118AE4), status),
+ status); /* A5+T*A7 */
+ fp2 = floatx80_add(fp2, float64_to_floatx80(
+ make_float64(0x3EC71DE3A5341531), status),
+ status); /* A4+T*A6 */
+ fp3 = floatx80_mul(fp3, fp1, status); /* T(A5+TA7) */
+ fp2 = floatx80_mul(fp2, fp1, status); /* T(A4+TA6) */
+ fp3 = floatx80_add(fp3, float64_to_floatx80(
+ make_float64(0xBF2A01A01A018B59), status),
+ status); /* A3+T(A5+TA7) */
+ fp4 = packFloatx80(0, 0x3FF8, LIT64(0x88888888888859AF));
+ fp2 = floatx80_add(fp2, fp4, status); /* A2+T(A4+TA6) */
+ fp1 = floatx80_mul(fp1, fp3, status); /* T(A3+T(A5+TA7)) */
+ fp2 = floatx80_mul(fp2, fp0, status); /* S(A2+T(A4+TA6)) */
+ fp4 = packFloatx80(1, 0x3FFC, LIT64(0xAAAAAAAAAAAAAA99));
+ fp1 = floatx80_add(fp1, fp4, status); /* A1+T(A3+T(A5+TA7)) */
+ fp1 = floatx80_add(fp1, fp2,
+ status); /* [A1+T(A3+T(A5+TA7))]+
+ * [S(A2+T(A4+TA6))]
+ */
+
+ x = packFloatx80(xSign, xExp, xSig);
+ fp0 = floatx80_mul(fp0, x, status); /* R'*S */
+ fp0 = floatx80_mul(fp0, fp1, status); /* SIN(R')-R' */
+
+ status->float_rounding_mode = user_rnd_mode;
+ status->floatx80_rounding_precision = user_rnd_prec;
+
+ a = floatx80_add(fp0, x, status);
+
+ float_raise(float_flag_inexact, status);
+
+ return a;
+ }
+ }
+}
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