diff options
Diffstat (limited to 'mdk-stage1/dietlibc/i386/tanh.S')
| -rw-r--r-- | mdk-stage1/dietlibc/i386/tanh.S | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/mdk-stage1/dietlibc/i386/tanh.S b/mdk-stage1/dietlibc/i386/tanh.S deleted file mode 100644 index 61d3f3376..000000000 --- a/mdk-stage1/dietlibc/i386/tanh.S +++ /dev/null @@ -1,32 +0,0 @@ - -.text -.type tanh,@function -.global tanh - -tanh: # note: exp(x) = 2^(x*log2(e)) - fldl2e - fmull 4(%esp) # x*log2(e) - fld %st(0) # x*log2(e) x*log2(e) - frndint # int(x*log2(e)) x*log2(e) - fxch # x*log2(e) int(x*log2(e)) - fsub %st(1),%st(0) # frac(x*log2(e)) int(x*log2(e)) - f2xm1 # 2^(fract(x*log2(e)))-1 int(x*log2(e)) - fld1 # 1 2^(fract(x*log2(e)))-1 int(x*log2(e)) - faddp %st(0),%st(1) # 2^(fract(x*log2(e))) int(x*log2(e)) - fscale # 2^(x*log2(e)) int(x*log2(e)) - fstp %st(1) # 2^(x*log2(e)) - -# now we have y = exp(x), but tanh(x) = (y - 1/y) / (y + 1/y) - - fld1 - fdiv %st(1),%st(0) # 1/y y - fld %st(0) # 1/y 1/y y - fadd %st(2) # y+1/y 1/y y - fxch %st(2) # y 1/y y+1/y - fsubp # y-1/y y+1/y - fdivp # (y-1/y)/(y+1/y) - ret - -.Lende: - -.size tanh,.ende-tanh |