[base] Move assembler code back in the source file.
FT_MulFix assembler used to reside in ftcalc.c before f47d263f1b.
* include/config/ftconfig.h, builds/unix/ftconfig.in,
builds/vms/ftconfig.h [FT_MULFIX_ASSEMBLER]: Move code from here...
* src/base/ftcalc.c [FT_MULFIX_ASSEMBLER]: ... to here.
This commit is contained in:
Alexei Podtelezhnikov
parent
1183cd4e17
commit
71330ceb50
13
ChangeLog
13
ChangeLog
@ -1,4 +1,15 @@
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2014-07-11 Alexei Podtelezhnikov <apodtele@gmail.com>
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2014-07-15 Alexei Podtelezhnikov <apodtele@gmail.com>
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[base] Move assembler code back in the source file.
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FT_MulFix assembler used to reside in ftcalc.c before f47d263f1b.
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* include/config/ftconfig.h, builds/unix/ftconfig.in,
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builds/vms/ftconfig.h [FT_MULFIX_ASSEMBLER]: Move code from here...
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* src/base/ftcalc.c [FT_MULFIX_ASSEMBLER]: ... to here.
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2014-07-14 Alexei Podtelezhnikov <apodtele@gmail.com>
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[base] Further clean up color bitmap conversion.
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@ -366,219 +366,6 @@ FT_BEGIN_HEADER
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#define FT_DUMMY_STMNT FT_BEGIN_STMNT FT_END_STMNT
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#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
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/* Provide assembler fragments for performance-critical functions. */
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/* These must be defined `static __inline__' with GCC. */
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#if defined( __CC_ARM ) || defined( __ARMCC__ ) /* RVCT */
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#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
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/* documentation is in freetype.h */
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static __inline FT_Int32
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FT_MulFix_arm( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 t, t2;
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__asm
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{
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smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
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mov a, t, asr #31 /* a = (hi >> 31) */
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add a, a, #0x8000 /* a += 0x8000 */
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adds t2, t2, a /* t2 += a */
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adc t, t, #0 /* t += carry */
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mov a, t2, lsr #16 /* a = t2 >> 16 */
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orr a, a, t, lsl #16 /* a |= t << 16 */
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}
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return a;
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}
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#endif /* __CC_ARM || __ARMCC__ */
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#ifdef __GNUC__
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#if defined( __arm__ ) && \
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( !defined( __thumb__ ) || defined( __thumb2__ ) ) && \
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!( defined( __CC_ARM ) || defined( __ARMCC__ ) )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
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/* documentation is in freetype.h */
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static __inline__ FT_Int32
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FT_MulFix_arm( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 t, t2;
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__asm__ __volatile__ (
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"smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
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"mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
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#if defined( __clang__ ) && defined( __thumb2__ )
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"add.w %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
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#else
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"add %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
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#endif
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"adds %1, %1, %0\n\t" /* %1 += %0 */
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"adc %2, %2, #0\n\t" /* %2 += carry */
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"mov %0, %1, lsr #16\n\t" /* %0 = %1 >> 16 */
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"orr %0, %0, %2, lsl #16\n\t" /* %0 |= %2 << 16 */
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: "=r"(a), "=&r"(t2), "=&r"(t)
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: "r"(a), "r"(b)
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: "cc" );
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return a;
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}
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#endif /* __arm__ && */
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/* ( __thumb2__ || !__thumb__ ) && */
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/* !( __CC_ARM || __ARMCC__ ) */
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#if defined( __i386__ )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
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/* documentation is in freetype.h */
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static __inline__ FT_Int32
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FT_MulFix_i386( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 result;
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__asm__ __volatile__ (
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"imul %%edx\n"
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"movl %%edx, %%ecx\n"
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"sarl $31, %%ecx\n"
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"addl $0x8000, %%ecx\n"
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"addl %%ecx, %%eax\n"
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"adcl $0, %%edx\n"
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"shrl $16, %%eax\n"
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"shll $16, %%edx\n"
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"addl %%edx, %%eax\n"
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: "=a"(result), "=d"(b)
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: "a"(a), "d"(b)
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: "%ecx", "cc" );
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return result;
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}
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#endif /* i386 */
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#endif /* __GNUC__ */
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#ifdef _MSC_VER /* Visual C++ */
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#ifdef _M_IX86
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#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
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/* documentation is in freetype.h */
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static __inline FT_Int32
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FT_MulFix_i386( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 result;
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__asm
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{
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mov eax, a
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mov edx, b
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imul edx
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mov ecx, edx
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sar ecx, 31
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add ecx, 8000h
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add eax, ecx
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adc edx, 0
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shr eax, 16
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shl edx, 16
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add eax, edx
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mov result, eax
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}
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return result;
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}
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#endif /* _M_IX86 */
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#endif /* _MSC_VER */
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#if defined( __GNUC__ ) && defined( __x86_64__ )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_x86_64
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static __inline__ FT_Int32
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FT_MulFix_x86_64( FT_Int32 a,
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FT_Int32 b )
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{
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/* Temporarily disable the warning that C90 doesn't support */
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/* `long long'. */
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#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wlong-long"
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#endif
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#if 1
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/* Technically not an assembly fragment, but GCC does a really good */
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/* job at inlining it and generating good machine code for it. */
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long long ret, tmp;
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ret = (long long)a * b;
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tmp = ret >> 63;
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ret += 0x8000 + tmp;
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return (FT_Int32)( ret >> 16 );
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#else
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/* For some reason, GCC 4.6 on Ubuntu 12.04 generates invalid machine */
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/* code from the lines below. The main issue is that `wide_a' is not */
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/* properly initialized by sign-extending `a'. Instead, the generated */
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/* machine code assumes that the register that contains `a' on input */
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/* can be used directly as a 64-bit value, which is wrong most of the */
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/* time. */
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long long wide_a = (long long)a;
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long long wide_b = (long long)b;
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long long result;
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__asm__ __volatile__ (
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"imul %2, %1\n"
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"mov %1, %0\n"
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"sar $63, %0\n"
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"lea 0x8000(%1, %0), %0\n"
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"sar $16, %0\n"
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: "=&r"(result), "=&r"(wide_a)
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: "r"(wide_b)
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: "cc" );
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return (FT_Int32)result;
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#endif
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#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
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#pragma GCC diagnostic pop
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#endif
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}
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#endif /* __GNUC__ && __x86_64__ */
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#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
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#ifdef FT_CONFIG_OPTION_INLINE_MULFIX
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#ifdef FT_MULFIX_ASSEMBLER
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#define FT_MULFIX_INLINED FT_MULFIX_ASSEMBLER
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#endif
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#endif
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#ifdef FT_MAKE_OPTION_SINGLE_OBJECT
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#define FT_LOCAL( x ) static x
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@ -306,219 +306,6 @@ FT_BEGIN_HEADER
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#define FT_DUMMY_STMNT FT_BEGIN_STMNT FT_END_STMNT
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#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
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/* Provide assembler fragments for performance-critical functions. */
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/* These must be defined `static __inline__' with GCC. */
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#if defined( __CC_ARM ) || defined( __ARMCC__ ) /* RVCT */
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#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
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/* documentation is in freetype.h */
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static __inline FT_Int32
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FT_MulFix_arm( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 t, t2;
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__asm
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{
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smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
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mov a, t, asr #31 /* a = (hi >> 31) */
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add a, a, #0x8000 /* a += 0x8000 */
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adds t2, t2, a /* t2 += a */
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adc t, t, #0 /* t += carry */
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mov a, t2, lsr #16 /* a = t2 >> 16 */
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orr a, a, t, lsl #16 /* a |= t << 16 */
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}
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return a;
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}
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#endif /* __CC_ARM || __ARMCC__ */
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#ifdef __GNUC__
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#if defined( __arm__ ) && \
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( !defined( __thumb__ ) || defined( __thumb2__ ) ) && \
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!( defined( __CC_ARM ) || defined( __ARMCC__ ) )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
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/* documentation is in freetype.h */
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static __inline__ FT_Int32
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FT_MulFix_arm( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 t, t2;
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__asm__ __volatile__ (
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"smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
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"mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
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#if defined( __clang__ ) && defined( __thumb2__ )
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"add.w %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
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#else
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"add %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
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#endif
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"adds %1, %1, %0\n\t" /* %1 += %0 */
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"adc %2, %2, #0\n\t" /* %2 += carry */
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"mov %0, %1, lsr #16\n\t" /* %0 = %1 >> 16 */
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"orr %0, %0, %2, lsl #16\n\t" /* %0 |= %2 << 16 */
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: "=r"(a), "=&r"(t2), "=&r"(t)
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: "r"(a), "r"(b)
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: "cc" );
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return a;
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}
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#endif /* __arm__ && */
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/* ( __thumb2__ || !__thumb__ ) && */
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/* !( __CC_ARM || __ARMCC__ ) */
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#if defined( __i386__ )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
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/* documentation is in freetype.h */
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static __inline__ FT_Int32
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FT_MulFix_i386( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 result;
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__asm__ __volatile__ (
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"imul %%edx\n"
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"movl %%edx, %%ecx\n"
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"sarl $31, %%ecx\n"
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"addl $0x8000, %%ecx\n"
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"addl %%ecx, %%eax\n"
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"adcl $0, %%edx\n"
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"shrl $16, %%eax\n"
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"shll $16, %%edx\n"
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"addl %%edx, %%eax\n"
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: "=a"(result), "=d"(b)
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: "a"(a), "d"(b)
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: "%ecx", "cc" );
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return result;
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}
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#endif /* i386 */
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#endif /* __GNUC__ */
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#ifdef _MSC_VER /* Visual C++ */
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#ifdef _M_IX86
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#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
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/* documentation is in freetype.h */
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static __inline FT_Int32
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FT_MulFix_i386( FT_Int32 a,
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FT_Int32 b )
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{
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register FT_Int32 result;
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__asm
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{
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mov eax, a
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mov edx, b
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imul edx
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mov ecx, edx
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sar ecx, 31
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add ecx, 8000h
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add eax, ecx
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adc edx, 0
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shr eax, 16
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shl edx, 16
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add eax, edx
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mov result, eax
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}
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return result;
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}
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#endif /* _M_IX86 */
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#endif /* _MSC_VER */
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#if defined( __GNUC__ ) && defined( __x86_64__ )
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#define FT_MULFIX_ASSEMBLER FT_MulFix_x86_64
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static __inline__ FT_Int32
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FT_MulFix_x86_64( FT_Int32 a,
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FT_Int32 b )
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{
|
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/* Temporarily disable the warning that C90 doesn't support */
|
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/* `long long'. */
|
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#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
|
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#pragma GCC diagnostic push
|
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#pragma GCC diagnostic ignored "-Wlong-long"
|
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#endif
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|
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#if 1
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/* Technically not an assembly fragment, but GCC does a really good */
|
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/* job at inlining it and generating good machine code for it. */
|
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long long ret, tmp;
|
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|
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|
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ret = (long long)a * b;
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tmp = ret >> 63;
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ret += 0x8000 + tmp;
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return (FT_Int32)( ret >> 16 );
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#else
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|
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/* For some reason, GCC 4.6 on Ubuntu 12.04 generates invalid machine */
|
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/* code from the lines below. The main issue is that `wide_a' is not */
|
||||
/* properly initialized by sign-extending `a'. Instead, the generated */
|
||||
/* machine code assumes that the register that contains `a' on input */
|
||||
/* can be used directly as a 64-bit value, which is wrong most of the */
|
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/* time. */
|
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long long wide_a = (long long)a;
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long long wide_b = (long long)b;
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long long result;
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__asm__ __volatile__ (
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"imul %2, %1\n"
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"mov %1, %0\n"
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"sar $63, %0\n"
|
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"lea 0x8000(%1, %0), %0\n"
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"sar $16, %0\n"
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: "=&r"(result), "=&r"(wide_a)
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: "r"(wide_b)
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: "cc" );
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return (FT_Int32)result;
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#endif
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|
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#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
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#pragma GCC diagnostic pop
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#endif
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}
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#endif /* __GNUC__ && __x86_64__ */
|
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|
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#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
|
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|
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|
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#ifdef FT_CONFIG_OPTION_INLINE_MULFIX
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#ifdef FT_MULFIX_ASSEMBLER
|
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#define FT_MULFIX_INLINED FT_MULFIX_ASSEMBLER
|
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#endif
|
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#endif
|
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|
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|
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#ifdef FT_MAKE_OPTION_SINGLE_OBJECT
|
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|
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#define FT_LOCAL( x ) static x
|
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|
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@ -333,219 +333,6 @@ FT_BEGIN_HEADER
|
||||
#define FT_DUMMY_STMNT FT_BEGIN_STMNT FT_END_STMNT
|
||||
|
||||
|
||||
#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
|
||||
/* Provide assembler fragments for performance-critical functions. */
|
||||
/* These must be defined `static __inline__' with GCC. */
|
||||
|
||||
#if defined( __CC_ARM ) || defined( __ARMCC__ ) /* RVCT */
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline FT_Int32
|
||||
FT_MulFix_arm( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
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register FT_Int32 t, t2;
|
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|
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|
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__asm
|
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{
|
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smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
|
||||
mov a, t, asr #31 /* a = (hi >> 31) */
|
||||
add a, a, #0x8000 /* a += 0x8000 */
|
||||
adds t2, t2, a /* t2 += a */
|
||||
adc t, t, #0 /* t += carry */
|
||||
mov a, t2, lsr #16 /* a = t2 >> 16 */
|
||||
orr a, a, t, lsl #16 /* a |= t << 16 */
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
#endif /* __CC_ARM || __ARMCC__ */
|
||||
|
||||
|
||||
#ifdef __GNUC__
|
||||
|
||||
#if defined( __arm__ ) && \
|
||||
( !defined( __thumb__ ) || defined( __thumb2__ ) ) && \
|
||||
!( defined( __CC_ARM ) || defined( __ARMCC__ ) )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_arm( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 t, t2;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
|
||||
"mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
|
||||
#if defined( __clang__ ) && defined( __thumb2__ )
|
||||
"add.w %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
|
||||
#else
|
||||
"add %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
|
||||
#endif
|
||||
"adds %1, %1, %0\n\t" /* %1 += %0 */
|
||||
"adc %2, %2, #0\n\t" /* %2 += carry */
|
||||
"mov %0, %1, lsr #16\n\t" /* %0 = %1 >> 16 */
|
||||
"orr %0, %0, %2, lsl #16\n\t" /* %0 |= %2 << 16 */
|
||||
: "=r"(a), "=&r"(t2), "=&r"(t)
|
||||
: "r"(a), "r"(b)
|
||||
: "cc" );
|
||||
return a;
|
||||
}
|
||||
|
||||
#endif /* __arm__ && */
|
||||
/* ( __thumb2__ || !__thumb__ ) && */
|
||||
/* !( __CC_ARM || __ARMCC__ ) */
|
||||
|
||||
|
||||
#if defined( __i386__ )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_i386( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 result;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"imul %%edx\n"
|
||||
"movl %%edx, %%ecx\n"
|
||||
"sarl $31, %%ecx\n"
|
||||
"addl $0x8000, %%ecx\n"
|
||||
"addl %%ecx, %%eax\n"
|
||||
"adcl $0, %%edx\n"
|
||||
"shrl $16, %%eax\n"
|
||||
"shll $16, %%edx\n"
|
||||
"addl %%edx, %%eax\n"
|
||||
: "=a"(result), "=d"(b)
|
||||
: "a"(a), "d"(b)
|
||||
: "%ecx", "cc" );
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* i386 */
|
||||
|
||||
#endif /* __GNUC__ */
|
||||
|
||||
|
||||
#ifdef _MSC_VER /* Visual C++ */
|
||||
|
||||
#ifdef _M_IX86
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline FT_Int32
|
||||
FT_MulFix_i386( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 result;
|
||||
|
||||
__asm
|
||||
{
|
||||
mov eax, a
|
||||
mov edx, b
|
||||
imul edx
|
||||
mov ecx, edx
|
||||
sar ecx, 31
|
||||
add ecx, 8000h
|
||||
add eax, ecx
|
||||
adc edx, 0
|
||||
shr eax, 16
|
||||
shl edx, 16
|
||||
add eax, edx
|
||||
mov result, eax
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* _M_IX86 */
|
||||
|
||||
#endif /* _MSC_VER */
|
||||
|
||||
|
||||
#if defined( __GNUC__ ) && defined( __x86_64__ )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_x86_64
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_x86_64( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
/* Temporarily disable the warning that C90 doesn't support */
|
||||
/* `long long'. */
|
||||
#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
|
||||
#pragma GCC diagnostic push
|
||||
#pragma GCC diagnostic ignored "-Wlong-long"
|
||||
#endif
|
||||
|
||||
#if 1
|
||||
/* Technically not an assembly fragment, but GCC does a really good */
|
||||
/* job at inlining it and generating good machine code for it. */
|
||||
long long ret, tmp;
|
||||
|
||||
|
||||
ret = (long long)a * b;
|
||||
tmp = ret >> 63;
|
||||
ret += 0x8000 + tmp;
|
||||
|
||||
return (FT_Int32)( ret >> 16 );
|
||||
#else
|
||||
|
||||
/* For some reason, GCC 4.6 on Ubuntu 12.04 generates invalid machine */
|
||||
/* code from the lines below. The main issue is that `wide_a' is not */
|
||||
/* properly initialized by sign-extending `a'. Instead, the generated */
|
||||
/* machine code assumes that the register that contains `a' on input */
|
||||
/* can be used directly as a 64-bit value, which is wrong most of the */
|
||||
/* time. */
|
||||
long long wide_a = (long long)a;
|
||||
long long wide_b = (long long)b;
|
||||
long long result;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"imul %2, %1\n"
|
||||
"mov %1, %0\n"
|
||||
"sar $63, %0\n"
|
||||
"lea 0x8000(%1, %0), %0\n"
|
||||
"sar $16, %0\n"
|
||||
: "=&r"(result), "=&r"(wide_a)
|
||||
: "r"(wide_b)
|
||||
: "cc" );
|
||||
|
||||
return (FT_Int32)result;
|
||||
#endif
|
||||
|
||||
#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
|
||||
#pragma GCC diagnostic pop
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* __GNUC__ && __x86_64__ */
|
||||
|
||||
#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
|
||||
|
||||
|
||||
#ifdef FT_CONFIG_OPTION_INLINE_MULFIX
|
||||
#ifdef FT_MULFIX_ASSEMBLER
|
||||
#define FT_MULFIX_INLINED FT_MULFIX_ASSEMBLER
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef FT_MAKE_OPTION_SINGLE_OBJECT
|
||||
|
||||
#define FT_LOCAL( x ) static x
|
||||
|
||||
@ -39,6 +39,219 @@
|
||||
#include FT_INTERNAL_DEBUG_H
|
||||
#include FT_INTERNAL_OBJECTS_H
|
||||
|
||||
|
||||
#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
|
||||
/* Provide assembler fragments for performance-critical functions. */
|
||||
/* These must be defined `static __inline__' with GCC. */
|
||||
|
||||
#if defined( __CC_ARM ) || defined( __ARMCC__ ) /* RVCT */
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline FT_Int32
|
||||
FT_MulFix_arm( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 t, t2;
|
||||
|
||||
|
||||
__asm
|
||||
{
|
||||
smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
|
||||
mov a, t, asr #31 /* a = (hi >> 31) */
|
||||
add a, a, #0x8000 /* a += 0x8000 */
|
||||
adds t2, t2, a /* t2 += a */
|
||||
adc t, t, #0 /* t += carry */
|
||||
mov a, t2, lsr #16 /* a = t2 >> 16 */
|
||||
orr a, a, t, lsl #16 /* a |= t << 16 */
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
#endif /* __CC_ARM || __ARMCC__ */
|
||||
|
||||
|
||||
#ifdef __GNUC__
|
||||
|
||||
#if defined( __arm__ ) && \
|
||||
( !defined( __thumb__ ) || defined( __thumb2__ ) ) && \
|
||||
!( defined( __CC_ARM ) || defined( __ARMCC__ ) )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_arm
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_arm( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 t, t2;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
|
||||
"mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
|
||||
#if defined( __clang__ ) && defined( __thumb2__ )
|
||||
"add.w %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
|
||||
#else
|
||||
"add %0, %0, #0x8000\n\t" /* %0 += 0x8000 */
|
||||
#endif
|
||||
"adds %1, %1, %0\n\t" /* %1 += %0 */
|
||||
"adc %2, %2, #0\n\t" /* %2 += carry */
|
||||
"mov %0, %1, lsr #16\n\t" /* %0 = %1 >> 16 */
|
||||
"orr %0, %0, %2, lsl #16\n\t" /* %0 |= %2 << 16 */
|
||||
: "=r"(a), "=&r"(t2), "=&r"(t)
|
||||
: "r"(a), "r"(b)
|
||||
: "cc" );
|
||||
return a;
|
||||
}
|
||||
|
||||
#endif /* __arm__ && */
|
||||
/* ( __thumb2__ || !__thumb__ ) && */
|
||||
/* !( __CC_ARM || __ARMCC__ ) */
|
||||
|
||||
|
||||
#if defined( __i386__ )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_i386( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 result;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"imul %%edx\n"
|
||||
"movl %%edx, %%ecx\n"
|
||||
"sarl $31, %%ecx\n"
|
||||
"addl $0x8000, %%ecx\n"
|
||||
"addl %%ecx, %%eax\n"
|
||||
"adcl $0, %%edx\n"
|
||||
"shrl $16, %%eax\n"
|
||||
"shll $16, %%edx\n"
|
||||
"addl %%edx, %%eax\n"
|
||||
: "=a"(result), "=d"(b)
|
||||
: "a"(a), "d"(b)
|
||||
: "%ecx", "cc" );
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* i386 */
|
||||
|
||||
#endif /* __GNUC__ */
|
||||
|
||||
|
||||
#ifdef _MSC_VER /* Visual C++ */
|
||||
|
||||
#ifdef _M_IX86
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_i386
|
||||
|
||||
/* documentation is in freetype.h */
|
||||
|
||||
static __inline FT_Int32
|
||||
FT_MulFix_i386( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
register FT_Int32 result;
|
||||
|
||||
__asm
|
||||
{
|
||||
mov eax, a
|
||||
mov edx, b
|
||||
imul edx
|
||||
mov ecx, edx
|
||||
sar ecx, 31
|
||||
add ecx, 8000h
|
||||
add eax, ecx
|
||||
adc edx, 0
|
||||
shr eax, 16
|
||||
shl edx, 16
|
||||
add eax, edx
|
||||
mov result, eax
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
#endif /* _M_IX86 */
|
||||
|
||||
#endif /* _MSC_VER */
|
||||
|
||||
|
||||
#if defined( __GNUC__ ) && defined( __x86_64__ )
|
||||
|
||||
#define FT_MULFIX_ASSEMBLER FT_MulFix_x86_64
|
||||
|
||||
static __inline__ FT_Int32
|
||||
FT_MulFix_x86_64( FT_Int32 a,
|
||||
FT_Int32 b )
|
||||
{
|
||||
/* Temporarily disable the warning that C90 doesn't support */
|
||||
/* `long long'. */
|
||||
#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
|
||||
#pragma GCC diagnostic push
|
||||
#pragma GCC diagnostic ignored "-Wlong-long"
|
||||
#endif
|
||||
|
||||
#if 1
|
||||
/* Technically not an assembly fragment, but GCC does a really good */
|
||||
/* job at inlining it and generating good machine code for it. */
|
||||
long long ret, tmp;
|
||||
|
||||
|
||||
ret = (long long)a * b;
|
||||
tmp = ret >> 63;
|
||||
ret += 0x8000 + tmp;
|
||||
|
||||
return (FT_Int32)( ret >> 16 );
|
||||
#else
|
||||
|
||||
/* For some reason, GCC 4.6 on Ubuntu 12.04 generates invalid machine */
|
||||
/* code from the lines below. The main issue is that `wide_a' is not */
|
||||
/* properly initialized by sign-extending `a'. Instead, the generated */
|
||||
/* machine code assumes that the register that contains `a' on input */
|
||||
/* can be used directly as a 64-bit value, which is wrong most of the */
|
||||
/* time. */
|
||||
long long wide_a = (long long)a;
|
||||
long long wide_b = (long long)b;
|
||||
long long result;
|
||||
|
||||
|
||||
__asm__ __volatile__ (
|
||||
"imul %2, %1\n"
|
||||
"mov %1, %0\n"
|
||||
"sar $63, %0\n"
|
||||
"lea 0x8000(%1, %0), %0\n"
|
||||
"sar $16, %0\n"
|
||||
: "=&r"(result), "=&r"(wide_a)
|
||||
: "r"(wide_b)
|
||||
: "cc" );
|
||||
|
||||
return (FT_Int32)result;
|
||||
#endif
|
||||
|
||||
#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 6 ) )
|
||||
#pragma GCC diagnostic pop
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* __GNUC__ && __x86_64__ */
|
||||
|
||||
#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
|
||||
|
||||
|
||||
#ifdef FT_CONFIG_OPTION_INLINE_MULFIX
|
||||
#ifdef FT_MULFIX_ASSEMBLER
|
||||
#define FT_MULFIX_INLINED FT_MULFIX_ASSEMBLER
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef FT_MULFIX_INLINED
|
||||
#undef FT_MulFix
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user