diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/math/i386/remainder.c | 12 | ||||
| -rw-r--r-- | src/math/i386/remainder.s | 14 | ||||
| -rw-r--r-- | src/math/i386/remainderf.c | 12 | ||||
| -rw-r--r-- | src/math/i386/remainderf.s | 14 | ||||
| -rw-r--r-- | src/math/i386/remainderl.c | 9 | ||||
| -rw-r--r-- | src/math/i386/remainderl.s | 11 | ||||
| -rw-r--r-- | src/math/x86_64/remainderl.c | 9 | ||||
| -rw-r--r-- | src/math/x86_64/remainderl.s | 11 |
8 files changed, 42 insertions, 50 deletions
diff --git a/src/math/i386/remainder.c b/src/math/i386/remainder.c new file mode 100644 index 00000000..c083df90 --- /dev/null +++ b/src/math/i386/remainder.c @@ -0,0 +1,12 @@ +#include <math.h> + +double remainder(double x, double y) +{ + unsigned short fpsr; + // fprem1 does not introduce excess precision into x + do __asm__ ("fprem1; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y)); + while (fpsr & 0x400); + return x; +} + +weak_alias(remainder, drem); diff --git a/src/math/i386/remainder.s b/src/math/i386/remainder.s deleted file mode 100644 index ab1da95d..00000000 --- a/src/math/i386/remainder.s +++ /dev/null @@ -1,14 +0,0 @@ -.global remainder -.type remainder,@function -remainder: -.weak drem -.type drem,@function -drem: - fldl 12(%esp) - fldl 4(%esp) -1: fprem1 - fnstsw %ax - sahf - jp 1b - fstp %st(1) - ret diff --git a/src/math/i386/remainderf.c b/src/math/i386/remainderf.c new file mode 100644 index 00000000..280207d2 --- /dev/null +++ b/src/math/i386/remainderf.c @@ -0,0 +1,12 @@ +#include <math.h> + +float remainderf(float x, float y) +{ + unsigned short fpsr; + // fprem1 does not introduce excess precision into x + do __asm__ ("fprem1; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y)); + while (fpsr & 0x400); + return x; +} + +weak_alias(remainderf, dremf); diff --git a/src/math/i386/remainderf.s b/src/math/i386/remainderf.s deleted file mode 100644 index 6a7378a3..00000000 --- a/src/math/i386/remainderf.s +++ /dev/null @@ -1,14 +0,0 @@ -.global remainderf -.type remainderf,@function -remainderf: -.weak dremf -.type dremf,@function -dremf: - flds 8(%esp) - flds 4(%esp) -1: fprem1 - fnstsw %ax - sahf - jp 1b - fstp %st(1) - ret diff --git a/src/math/i386/remainderl.c b/src/math/i386/remainderl.c new file mode 100644 index 00000000..8cf75071 --- /dev/null +++ b/src/math/i386/remainderl.c @@ -0,0 +1,9 @@ +#include <math.h> + +long double remainderl(long double x, long double y) +{ + unsigned short fpsr; + do __asm__ ("fprem1; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y)); + while (fpsr & 0x400); + return x; +} diff --git a/src/math/i386/remainderl.s b/src/math/i386/remainderl.s deleted file mode 100644 index b41518ed..00000000 --- a/src/math/i386/remainderl.s +++ /dev/null @@ -1,11 +0,0 @@ -.global remainderl -.type remainderl,@function -remainderl: - fldt 16(%esp) - fldt 4(%esp) -1: fprem1 - fnstsw %ax - sahf - jp 1b - fstp %st(1) - ret diff --git a/src/math/x86_64/remainderl.c b/src/math/x86_64/remainderl.c new file mode 100644 index 00000000..8cf75071 --- /dev/null +++ b/src/math/x86_64/remainderl.c @@ -0,0 +1,9 @@ +#include <math.h> + +long double remainderl(long double x, long double y) +{ + unsigned short fpsr; + do __asm__ ("fprem1; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y)); + while (fpsr & 0x400); + return x; +} diff --git a/src/math/x86_64/remainderl.s b/src/math/x86_64/remainderl.s deleted file mode 100644 index cb3857b4..00000000 --- a/src/math/x86_64/remainderl.s +++ /dev/null @@ -1,11 +0,0 @@ -.global remainderl -.type remainderl,@function -remainderl: - fldt 24(%rsp) - fldt 8(%rsp) -1: fprem1 - fnstsw %ax - testb $4,%ah - jnz 1b - fstp %st(1) - ret |