Date: Sun, 16 Sep 2012 16:58:49 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r240566 - head/lib/msun/i387 Message-ID: <201209161658.q8GGwnM6034873@svn.freebsd.org>
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Author: tijl Date: Sun Sep 16 16:58:49 2012 New Revision: 240566 URL: http://svn.freebsd.org/changeset/base/240566 Log: Optimise i387 trigonometric functions. Replace "andw 0x400,%ax \ jnz" with "sahf \ jp", "fprem1" with "fprem" and "fstsw %ax" with "fnstsw %ax". Modified: head/lib/msun/i387/s_cos.S head/lib/msun/i387/s_sin.S head/lib/msun/i387/s_tan.S Modified: head/lib/msun/i387/s_cos.S ============================================================================== --- head/lib/msun/i387/s_cos.S Sun Sep 16 16:08:20 2012 (r240565) +++ head/lib/msun/i387/s_cos.S Sun Sep 16 16:58:49 2012 (r240566) @@ -40,16 +40,16 @@ ENTRY(cos) fldl 4(%esp) fcos fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 +2: fprem fnstsw %ax - andw $0x400,%ax - jnz 2b + sahf + jp 2b fstp %st(1) fcos ret Modified: head/lib/msun/i387/s_sin.S ============================================================================== --- head/lib/msun/i387/s_sin.S Sun Sep 16 16:08:20 2012 (r240565) +++ head/lib/msun/i387/s_sin.S Sun Sep 16 16:58:49 2012 (r240566) @@ -40,16 +40,16 @@ ENTRY(sin) fldl 4(%esp) fsin fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 +2: fprem fnstsw %ax - andw $0x400,%ax - jnz 2b + sahf + jp 2b fstp %st(1) fsin ret Modified: head/lib/msun/i387/s_tan.S ============================================================================== --- head/lib/msun/i387/s_tan.S Sun Sep 16 16:08:20 2012 (r240565) +++ head/lib/msun/i387/s_tan.S Sun Sep 16 16:58:49 2012 (r240566) @@ -40,17 +40,17 @@ ENTRY(tan) fldl 4(%esp) fptan fnstsw %ax - andw $0x400,%ax - jnz 1f + sahf + jp 1f fstp %st(0) ret 1: fldpi fadd %st(0) fxch %st(1) -2: fprem1 - fstsw %ax - andw $0x400,%ax - jnz 2b +2: fprem + fnstsw %ax + sahf + jp 2b fstp %st(1) fptan fstp %st(0)
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