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LibM: Use fcos for cosine

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For some reason we were using sin(x+M_PI_2) instead
This commit is contained in:
Hendiadyoin1 2021-07-05 16:08:37 +02:00 • committed by Andreas Kling
commit 119f280f34
Notes: sideshowbarker 2024-07-18 10:20:33 +09:00
1 changed files with 23 additions and 6 deletions
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29
Userland/Libraries/LibM/math.cpp
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@ -357,23 +357,40 @@ long double truncl(long double x) NOEXCEPT
long double cosl(long double angle) NOEXCEPT long double cosl(long double angle) NOEXCEPT
{ {
return sinl(angle + M_PI_2); long double ret = 0.0;
asm(
"fcos"
: "=t"(ret)
: "0"(angle));
return ret;
} }
double cos(double angle) NOEXCEPT double cos(double angle) NOEXCEPT
{ {
return sin(angle + M_PI_2); double ret = 0.0;
asm(
"fcos"
: "=t"(ret)
: "0"(angle));
return ret;
} }
float cosf(float angle) NOEXCEPT float cosf(float angle) NOEXCEPT
{ {
return sinf(angle + static_cast<float>(M_PI_2)); float ret = 0.0;
asm(
"fcos"
: "=t"(ret)
: "0"(angle));
return ret;
} }
long double sinl(long double angle) NOEXCEPT long double sinl(long double angle) NOEXCEPT
{ {
long double ret = 0.0; long double ret = 0.0;
__asm__( asm(
"fsin" "fsin"
: "=t"(ret) : "=t"(ret)
: "0"(angle)); : "0"(angle));
@ -388,7 +405,7 @@ long double sinl(long double angle) NOEXCEPT
double sin(double angle) NOEXCEPT double sin(double angle) NOEXCEPT
{ {
double ret = 0.0; double ret = 0.0;
__asm__( asm(
"fsin" "fsin"
: "=t"(ret) : "=t"(ret)
: "0"(angle)); : "0"(angle));
@ -399,7 +416,7 @@ double sin(double angle) NOEXCEPT
float sinf(float angle) NOEXCEPT float sinf(float angle) NOEXCEPT
{ {
float ret = 0.0f; float ret = 0.0f;
__asm__( asm(
"fsin" "fsin"
: "=t"(ret) : "=t"(ret)
: "0"(angle)); : "0"(angle));