| -rw-r--r-- | lib/jit_ppc-cpu.c | 73 |
diff --git a/lib/jit_ppc-cpu.c b/lib/jit_ppc-cpu.c index 67874c6..031f95d 100644 --- a/lib/jit_ppc-cpu.c +++ b/lib/jit_ppc-cpu.c @@ -533,8 +533,6 @@ static void _casx(jit_state_t *_jit,jit_int32_t,jit_int32_t, #define casi(r0, i0, r1, r2) casx(r0, _NOREG, r1, r2, i0) # define negr(r0,r1) NEG(r0,r1) # define comr(r0,r1) NOT(r0,r1) -# define bitswap(r0, r1) _bitswap(_jit, r0, r1) -static void _bitswap(jit_state_t*, jit_int32_t, jit_int32_t); # define clor(r0, r1) _clor(_jit, r0, r1) static void _clor(jit_state_t*, jit_int32_t, jit_int32_t); # if __WORDSIZE == 32 @@ -1220,73 +1218,6 @@ _casx(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_unget_reg(r1_reg); } -/* http://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel */ -/* -unsigned int v; // 32-bit word to reverse bit order - -// swap odd and even bits -v = ((v >> 1) & 0x55555555) | ((v & 0x55555555) << 1); -// swap consecutive pairs -v = ((v >> 2) & 0x33333333) | ((v & 0x33333333) << 2); -// swap nibbles ... -v = ((v >> 4) & 0x0F0F0F0F) | ((v & 0x0F0F0F0F) << 4); -// swap bytes -v = ((v >> 8) & 0x00FF00FF) | ((v & 0x00FF00FF) << 8); -// swap 2-byte long pairs -v = ( v >> 16 ) | ( v << 16); - */ -static void -_bitswap(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1) -{ - jit_int32_t t0, t1, t2, t3, t4; - movr(r0, r1); - t0 = jit_get_reg(jit_class_gpr); - t1 = jit_get_reg(jit_class_gpr); - t2 = jit_get_reg(jit_class_gpr); - movi(rn(t0), __WORDSIZE == 32 ? 0x55555555L : 0x5555555555555555L); - rshi_u(rn(t1), r0, 1); /* t1 = v >> 1 */ - andr(rn(t1), rn(t1), rn(t0)); /* t1 &= t0 */ - andr(rn(t2), r0, rn(t0)); /* t2 = v & t0*/ - lshi(rn(t2), rn(t2), 1); /* t2 <<= 1 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ - movi(rn(t0), __WORDSIZE == 32 ? 0x33333333L : 0x3333333333333333L); - rshi_u(rn(t1), r0, 2); /* t1 = v >> 2 */ - andr(rn(t1), rn(t1), rn(t0)); /* t1 &= t0 */ - andr(rn(t2), r0, rn(t0)); /* t2 = v & t0*/ - lshi(rn(t2), rn(t2), 2); /* t2 <<= 2 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ - movi(rn(t0), __WORDSIZE == 32 ? 0x0f0f0f0fL : 0x0f0f0f0f0f0f0f0fL); - rshi_u(rn(t1), r0, 4); /* t1 = v >> 4 */ - andr(rn(t1), rn(t1), rn(t0)); /* t1 &= t0 */ - andr(rn(t2), r0, rn(t0)); /* t2 = v & t0*/ - lshi(rn(t2), rn(t2), 4); /* t2 <<= 4 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ - movi(rn(t0), __WORDSIZE == 32 ? 0x00ff00ffL : 0x00ff00ff00ff00ffL); - rshi_u(rn(t1), r0, 8); /* t1 = v >> 8 */ - andr(rn(t1), rn(t1), rn(t0)); /* t1 &= t0 */ - andr(rn(t2), r0, rn(t0)); /* t2 = v & t0*/ - lshi(rn(t2), rn(t2), 8); /* t2 <<= 8 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ -# if __WORDSIZE == 32 - rshi_u(rn(t1), r0, 16); /* t1 = v >> 16 */ - lshi(rn(t2), r0, 16); /* t2 = v << 16 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ -# else - movi(rn(t0), 0x0000ffff0000ffffL); - rshi_u(rn(t1), r0, 16); /* t1 = v >> 16 */ - andr(rn(t1), rn(t1), rn(t0)); /* t1 &= t0 */ - andr(rn(t2), r0, rn(t0)); /* t2 = v & t0*/ - lshi(rn(t2), rn(t2), 16); /* t2 <<= 16 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ - rshi_u(rn(t1), r0, 32); /* t1 = v >> 32 */ - lshi(rn(t2), r0, 32); /* t2 = v << 32 */ - orr(r0, rn(t1), rn(t2)); /* v = t1 | t2 */ -# endif - jit_unget_reg(t2); - jit_unget_reg(t1); - jit_unget_reg(t0); -} - static void _clor(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1) { @@ -1297,14 +1228,14 @@ _clor(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1) static void _ctor(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1) { - bitswap(r0, r1); + fallback_bitswap(r0, r1); clor(r0, r0); } static void _ctzr(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1) { - bitswap(r0, r1); + fallback_bitswap(r0, r1); clzr(r0, r0); } |