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target-i386: fix logarithmic and trigonometric helpers wrt softfloat

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Use the new CPU86_LDouble <-> double conversion functions to make logarithmic
and trigonometric helpers working with softfloat.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2011-04-20 13:04:23 +02:00
parent 47c0143cdd
commit a2c9ed3cbf
1 changed files with 26 additions and 26 deletions
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52
target-i386/op_helper.c
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@ -17,6 +17,7 @@
* License along with this library; if not, see <http://www.gnu.org/licenses/>. * License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/ */
#include <math.h>
#include "exec.h" #include "exec.h"
#include "exec-all.h" #include "exec-all.h"
#include "host-utils.h" #include "host-utils.h"
@ -3981,17 +3982,19 @@ void helper_fbst_ST0(target_ulong ptr)
void helper_f2xm1(void) void helper_f2xm1(void)
{ {
ST0 = pow(2.0,ST0) - 1.0; double val = CPU86_LDouble_to_double(ST0);
val = pow(2.0, val) - 1.0;
ST0 = double_to_CPU86_LDouble(val);
} }
void helper_fyl2x(void) void helper_fyl2x(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if (fptemp>0.0){ if (fptemp>0.0){
fptemp = log(fptemp)/log(2.0); /* log2(ST) */ fptemp = log(fptemp)/log(2.0); /* log2(ST) */
ST1 *= fptemp; fptemp *= CPU86_LDouble_to_double(ST1);
ST1 = double_to_CPU86_LDouble(fptemp);
fpop(); fpop();
} else { } else {
env->fpus &= (~0x4700); env->fpus &= (~0x4700);
@ -4001,15 +4004,15 @@ void helper_fyl2x(void)
void helper_fptan(void) void helper_fptan(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
env->fpus |= 0x400; env->fpus |= 0x400;
} else { } else {
ST0 = tan(fptemp); fptemp = tan(fptemp);
ST0 = double_to_CPU86_LDouble(fptemp);
fpush(); fpush();
ST0 = 1.0; ST0 = floatx_one;
env->fpus &= (~0x400); /* C2 <-- 0 */ env->fpus &= (~0x400); /* C2 <-- 0 */
/* the above code is for |arg| < 2**52 only */ /* the above code is for |arg| < 2**52 only */
} }
@ -4017,11 +4020,11 @@ void helper_fptan(void)
void helper_fpatan(void) void helper_fpatan(void)
{ {
CPU86_LDouble fptemp, fpsrcop; double fptemp, fpsrcop;
fpsrcop = ST1; fpsrcop = CPU86_LDouble_to_double(ST1);
fptemp = ST0; fptemp = CPU86_LDouble_to_double(ST0);
ST1 = atan2(fpsrcop,fptemp); ST1 = double_to_CPU86_LDouble(atan2(fpsrcop, fptemp));
fpop(); fpop();
} }
@ -4159,12 +4162,12 @@ void helper_fprem(void)
void helper_fyl2xp1(void) void helper_fyl2xp1(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if ((fptemp+1.0)>0.0) { if ((fptemp+1.0)>0.0) {
fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */
ST1 *= fptemp; fptemp *= CPU86_LDouble_to_double(ST1);
ST1 = double_to_CPU86_LDouble(fptemp);
fpop(); fpop();
} else { } else {
env->fpus &= (~0x4700); env->fpus &= (~0x4700);
@ -4183,15 +4186,14 @@ void helper_fsqrt(void)
void helper_fsincos(void) void helper_fsincos(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
env->fpus |= 0x400; env->fpus |= 0x400;
} else { } else {
ST0 = sin(fptemp); ST0 = double_to_CPU86_LDouble(sin(fptemp));
fpush(); fpush();
ST0 = cos(fptemp); ST0 = double_to_CPU86_LDouble(cos(fptemp));
env->fpus &= (~0x400); /* C2 <-- 0 */ env->fpus &= (~0x400); /* C2 <-- 0 */
/* the above code is for |arg| < 2**63 only */ /* the above code is for |arg| < 2**63 only */
} }
@ -4214,13 +4216,12 @@ void helper_fscale(void)
void helper_fsin(void) void helper_fsin(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
env->fpus |= 0x400; env->fpus |= 0x400;
} else { } else {
ST0 = sin(fptemp); ST0 = double_to_CPU86_LDouble(sin(fptemp));
env->fpus &= (~0x400); /* C2 <-- 0 */ env->fpus &= (~0x400); /* C2 <-- 0 */
/* the above code is for |arg| < 2**53 only */ /* the above code is for |arg| < 2**53 only */
} }
@ -4228,13 +4229,12 @@ void helper_fsin(void)
void helper_fcos(void) void helper_fcos(void)
{ {
CPU86_LDouble fptemp; double fptemp = CPU86_LDouble_to_double(ST0);
fptemp = ST0;
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
env->fpus |= 0x400; env->fpus |= 0x400;
} else { } else {
ST0 = cos(fptemp); ST0 = double_to_CPU86_LDouble(cos(fptemp));
env->fpus &= (~0x400); /* C2 <-- 0 */ env->fpus &= (~0x400); /* C2 <-- 0 */
/* the above code is for |arg5 < 2**63 only */ /* the above code is for |arg5 < 2**63 only */
} }