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| author | Aurelien Jarno <aurelien@aurel32.net> | 2011-04-20 13:04:23 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2011-04-25 11:18:33 +0200 |
| commit | bcb5fec5af5d543f6ea0efa513c00503a2ada5b6 (patch) | |
| tree | 08656b10d731ff309f266f5f8a1bfb5d695e1ac7 /target-i386/op_helper.c | |
| parent | a2c9ed3cbfde4ce521b6b9672afc4fd8cf67ab8e (diff) | |
| download | qemu-bcb5fec5af5d543f6ea0efa513c00503a2ada5b6.zip qemu-bcb5fec5af5d543f6ea0efa513c00503a2ada5b6.tar.gz qemu-bcb5fec5af5d543f6ea0efa513c00503a2ada5b6.tar.bz2 | |
target-i386: fix helper_fprem() and helper_fprem1() wrt softfloat
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-i386/op_helper.c')
| -rw-r--r-- | target-i386/op_helper.c | 48 |
1 files changed, 28 insertions, 20 deletions
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c index fd9d8d3..334f130 100644 --- a/target-i386/op_helper.c +++ b/target-i386/op_helper.c @@ -4053,21 +4053,24 @@ void helper_fxtract(void) void helper_fprem1(void) { - CPU86_LDouble dblq, fpsrcop, fptemp; + double st0, st1, dblq, fpsrcop, fptemp; CPU86_LDoubleU fpsrcop1, fptemp1; int expdif; signed long long int q; - if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) { - ST0 = 0.0 / 0.0; /* NaN */ + st0 = CPU86_LDouble_to_double(ST0); + st1 = CPU86_LDouble_to_double(ST1); + + if (isinf(st0) || isnan(st0) || isnan(st1) || (st1 == 0.0)) { + ST0 = double_to_CPU86_LDouble(0.0 / 0.0); /* NaN */ env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ return; } - fpsrcop = ST0; - fptemp = ST1; - fpsrcop1.d = fpsrcop; - fptemp1.d = fptemp; + fpsrcop = st0; + fptemp = st1; + fpsrcop1.d = ST0; + fptemp1.d = ST1; expdif = EXPD(fpsrcop1) - EXPD(fptemp1); if (expdif < 0) { @@ -4081,7 +4084,7 @@ void helper_fprem1(void) dblq = fpsrcop / fptemp; /* round dblq towards nearest integer */ dblq = rint(dblq); - ST0 = fpsrcop - fptemp * dblq; + st0 = fpsrcop - fptemp * dblq; /* convert dblq to q by truncating towards zero */ if (dblq < 0.0) @@ -4097,31 +4100,35 @@ void helper_fprem1(void) } else { env->fpus |= 0x400; /* C2 <-- 1 */ fptemp = pow(2.0, expdif - 50); - fpsrcop = (ST0 / ST1) / fptemp; + fpsrcop = (st0 / st1) / fptemp; /* fpsrcop = integer obtained by chopping */ fpsrcop = (fpsrcop < 0.0) ? -(floor(fabs(fpsrcop))) : floor(fpsrcop); - ST0 -= (ST1 * fpsrcop * fptemp); + st0 -= (st1 * fpsrcop * fptemp); } + ST0 = double_to_CPU86_LDouble(st0); } void helper_fprem(void) { - CPU86_LDouble dblq, fpsrcop, fptemp; + double st0, st1, dblq, fpsrcop, fptemp; CPU86_LDoubleU fpsrcop1, fptemp1; int expdif; signed long long int q; - if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) { - ST0 = 0.0 / 0.0; /* NaN */ + st0 = CPU86_LDouble_to_double(ST0); + st1 = CPU86_LDouble_to_double(ST1); + + if (isinf(st0) || isnan(st0) || isnan(st1) || (st1 == 0.0)) { + ST0 = double_to_CPU86_LDouble(0.0 / 0.0); /* NaN */ env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ return; } - fpsrcop = (CPU86_LDouble)ST0; - fptemp = (CPU86_LDouble)ST1; - fpsrcop1.d = fpsrcop; - fptemp1.d = fptemp; + fpsrcop = st0; + fptemp = st1; + fpsrcop1.d = ST0; + fptemp1.d = ST1; expdif = EXPD(fpsrcop1) - EXPD(fptemp1); if (expdif < 0) { @@ -4135,7 +4142,7 @@ void helper_fprem(void) dblq = fpsrcop/*ST0*/ / fptemp/*ST1*/; /* round dblq towards zero */ dblq = (dblq < 0.0) ? ceil(dblq) : floor(dblq); - ST0 = fpsrcop/*ST0*/ - fptemp * dblq; + st0 = fpsrcop/*ST0*/ - fptemp * dblq; /* convert dblq to q by truncating towards zero */ if (dblq < 0.0) @@ -4152,12 +4159,13 @@ void helper_fprem(void) int N = 32 + (expdif % 32); /* as per AMD docs */ env->fpus |= 0x400; /* C2 <-- 1 */ fptemp = pow(2.0, (double)(expdif - N)); - fpsrcop = (ST0 / ST1) / fptemp; + fpsrcop = (st0 / st1) / fptemp; /* fpsrcop = integer obtained by chopping */ fpsrcop = (fpsrcop < 0.0) ? -(floor(fabs(fpsrcop))) : floor(fpsrcop); - ST0 -= (ST1 * fpsrcop * fptemp); + st0 -= (st1 * fpsrcop * fptemp); } + ST0 = double_to_CPU86_LDouble(st0); } void helper_fyl2xp1(void) |