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m68k: remove dead code (Coverity CID1390617)

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floatx80_sin() and floatx80_cos() are derived from one
sincos() function. They have both unused code coming from
their common origin. Remove it.

Backports commit 6361d2984ce88912976a34e1797a5ad5139c649b from qemu
This commit is contained in:
Laurent Vivier 2018-05-01 11:44:15 -04:00 committed by Lioncash
parent ebf0c8f9ca
commit 97c8507f00
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 14 additions and 29 deletions
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31
qemu/target/m68k/softfloat.c
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@ -1497,7 +1497,7 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
int32_t compact, l, n, j; int32_t compact, l, n, j;
floatx80 fp0, fp1, fp2, fp3, fp4, fp5, x, invtwopi, twopi1, twopi2; floatx80 fp0, fp1, fp2, fp3, fp4, fp5, x, invtwopi, twopi1, twopi2;
float32 posneg1, twoto63; float32 posneg1, twoto63;
flag adjn, endflag; flag endflag;
aSig = extractFloatx80Frac(a); aSig = extractFloatx80Frac(a);
aExp = extractFloatx80Exp(a); aExp = extractFloatx80Exp(a);
@ -1515,8 +1515,6 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
return packFloatx80(aSign, 0, 0); return packFloatx80(aSign, 0, 0);
} }
adjn = 0;
user_rnd_mode = status->float_rounding_mode; user_rnd_mode = status->float_rounding_mode;
user_rnd_prec = status->floatx80_rounding_precision; user_rnd_prec = status->floatx80_rounding_precision;
status->float_rounding_mode = float_round_nearest_even; status->float_rounding_mode = float_round_nearest_even;
@ -1591,14 +1589,8 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
status->float_rounding_mode = user_rnd_mode; status->float_rounding_mode = user_rnd_mode;
status->floatx80_rounding_precision = user_rnd_prec; status->floatx80_rounding_precision = user_rnd_prec;
if (adjn) {
/* COSTINY */
a = floatx80_sub(fp0, float32_to_floatx80(
make_float32(0x00800000), status), status);
} else {
/* SINTINY */ /* SINTINY */
a = floatx80_move(a, status); a = floatx80_move(a, status);
}
float_raise(float_flag_inexact, status); float_raise(float_flag_inexact, status);
return a; return a;
@ -1616,7 +1608,7 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
status); /* FP0 IS R = (X-Y1)-Y2 */ status); /* FP0 IS R = (X-Y1)-Y2 */
sincont: sincont:
if ((n + adjn) & 1) { if (n & 1) {
/* COSPOLY */ /* COSPOLY */
fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */
@ -1629,7 +1621,7 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
xExp = extractFloatx80Exp(fp0); xExp = extractFloatx80Exp(fp0);
xSig = extractFloatx80Frac(fp0); xSig = extractFloatx80Frac(fp0);
if (((n + adjn) >> 1) & 1) { if ((n >> 1) & 1) {
xSign ^= 1; xSign ^= 1;
posneg1 = make_float32(0xBF800000); /* -1 */ posneg1 = make_float32(0xBF800000); /* -1 */
} else { } else {
@ -1681,7 +1673,7 @@ floatx80 floatx80_sin(floatx80 a, float_status *status)
xExp = extractFloatx80Exp(fp0); xExp = extractFloatx80Exp(fp0);
xSig = extractFloatx80Frac(fp0); xSig = extractFloatx80Frac(fp0);
xSign ^= ((n + adjn) >> 1) & 1; /* X IS NOW R'= SGN*R */ xSign ^= (n >> 1) & 1; /* X IS NOW R'= SGN*R */
fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */
@ -1744,7 +1736,7 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
int32_t compact, l, n, j; int32_t compact, l, n, j;
floatx80 fp0, fp1, fp2, fp3, fp4, fp5, x, invtwopi, twopi1, twopi2; floatx80 fp0, fp1, fp2, fp3, fp4, fp5, x, invtwopi, twopi1, twopi2;
float32 posneg1, twoto63; float32 posneg1, twoto63;
flag adjn, endflag; flag endflag;
aSig = extractFloatx80Frac(a); aSig = extractFloatx80Frac(a);
aExp = extractFloatx80Exp(a); aExp = extractFloatx80Exp(a);
@ -1762,8 +1754,6 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
return packFloatx80(0, one_exp, one_sig); return packFloatx80(0, one_exp, one_sig);
} }
adjn = 1;
user_rnd_mode = status->float_rounding_mode; user_rnd_mode = status->float_rounding_mode;
user_rnd_prec = status->floatx80_rounding_precision; user_rnd_prec = status->floatx80_rounding_precision;
status->float_rounding_mode = float_round_nearest_even; status->float_rounding_mode = float_round_nearest_even;
@ -1837,15 +1827,10 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
status->float_rounding_mode = user_rnd_mode; status->float_rounding_mode = user_rnd_mode;
status->floatx80_rounding_precision = user_rnd_prec; status->floatx80_rounding_precision = user_rnd_prec;
if (adjn) {
/* COSTINY */ /* COSTINY */
a = floatx80_sub(fp0, float32_to_floatx80( a = floatx80_sub(fp0, float32_to_floatx80(
make_float32(0x00800000), status), make_float32(0x00800000), status),
status); status);
} else {
/* SINTINY */
a = floatx80_move(a, status);
}
float_raise(float_flag_inexact, status); float_raise(float_flag_inexact, status);
return a; return a;
@ -1863,7 +1848,7 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
status); /* FP0 IS R = (X-Y1)-Y2 */ status); /* FP0 IS R = (X-Y1)-Y2 */
sincont: sincont:
if ((n + adjn) & 1) { if ((n + 1) & 1) {
/* COSPOLY */ /* COSPOLY */
fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */
@ -1876,7 +1861,7 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
xExp = extractFloatx80Exp(fp0); xExp = extractFloatx80Exp(fp0);
xSig = extractFloatx80Frac(fp0); xSig = extractFloatx80Frac(fp0);
if (((n + adjn) >> 1) & 1) { if (((n + 1) >> 1) & 1) {
xSign ^= 1; xSign ^= 1;
posneg1 = make_float32(0xBF800000); /* -1 */ posneg1 = make_float32(0xBF800000); /* -1 */
} else { } else {
@ -1927,7 +1912,7 @@ floatx80 floatx80_cos(floatx80 a, float_status *status)
xExp = extractFloatx80Exp(fp0); xExp = extractFloatx80Exp(fp0);
xSig = extractFloatx80Frac(fp0); xSig = extractFloatx80Frac(fp0);
xSign ^= ((n + adjn) >> 1) & 1; /* X IS NOW R'= SGN*R */ xSign ^= ((n + 1) >> 1) & 1; /* X IS NOW R'= SGN*R */
fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */ fp0 = floatx80_mul(fp0, fp0, status); /* FP0 IS S */
fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */ fp1 = floatx80_mul(fp0, fp0, status); /* FP1 IS T */