From 38de4c46f2560c08a113c65bd6186ac31f1869dd Mon Sep 17 00:00:00 2001 From: Blue Swirl Date: Sat, 12 May 2012 20:39:26 +0000 Subject: x86: split condition code and shift templates Move shift templates from helper_template.h to shift_helper_template.h and the condition code helpers to cc_helper_template.h. Signed-off-by: Blue Swirl --- target-i386/cc_helper_template.h | 277 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 277 insertions(+) create mode 100644 target-i386/cc_helper_template.h (limited to 'target-i386/cc_helper_template.h') diff --git a/target-i386/cc_helper_template.h b/target-i386/cc_helper_template.h new file mode 100644 index 0000000..ff22830 --- /dev/null +++ b/target-i386/cc_helper_template.h @@ -0,0 +1,277 @@ +/* + * x86 condition code helpers + * + * Copyright (c) 2008 Fabrice Bellard + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + */ + +#define DATA_BITS (1 << (3 + SHIFT)) +#define SIGN_MASK (((target_ulong)1) << (DATA_BITS - 1)) + +#if DATA_BITS == 8 +#define SUFFIX b +#define DATA_TYPE uint8_t +#define DATA_MASK 0xff +#elif DATA_BITS == 16 +#define SUFFIX w +#define DATA_TYPE uint16_t +#define DATA_MASK 0xffff +#elif DATA_BITS == 32 +#define SUFFIX l +#define DATA_TYPE uint32_t +#define DATA_MASK 0xffffffff +#elif DATA_BITS == 64 +#define SUFFIX q +#define DATA_TYPE uint64_t +#define DATA_MASK 0xffffffffffffffffULL +#else +#error unhandled operand size +#endif + +/* dynamic flags computation */ + +static int glue(compute_all_add, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_SRC; + src2 = CC_DST - CC_SRC; + cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_add, SUFFIX)(void) +{ + int cf; + target_long src1; + + src1 = CC_SRC; + cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; + return cf; +} + +static int glue(compute_all_adc, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_SRC; + src2 = CC_DST - CC_SRC - 1; + cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_adc, SUFFIX)(void) +{ + int cf; + target_long src1; + + src1 = CC_SRC; + cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; + return cf; +} + +static int glue(compute_all_sub, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_DST + CC_SRC; + src2 = CC_SRC; + cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_sub, SUFFIX)(void) +{ + int cf; + target_long src1, src2; + + src1 = CC_DST + CC_SRC; + src2 = CC_SRC; + cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; + return cf; +} + +static int glue(compute_all_sbb, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_DST + CC_SRC + 1; + src2 = CC_SRC; + cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_sbb, SUFFIX)(void) +{ + int cf; + target_long src1, src2; + + src1 = CC_DST + CC_SRC + 1; + src2 = CC_SRC; + cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; + return cf; +} + +static int glue(compute_all_logic, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + + cf = 0; + pf = parity_table[(uint8_t)CC_DST]; + af = 0; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = 0; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_logic, SUFFIX)(void) +{ + return 0; +} + +static int glue(compute_all_inc, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_DST - 1; + src2 = 1; + cf = CC_SRC; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11; + return cf | pf | af | zf | sf | of; +} + +#if DATA_BITS == 32 +static int glue(compute_c_inc, SUFFIX)(void) +{ + return CC_SRC; +} +#endif + +static int glue(compute_all_dec, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + target_long src1, src2; + + src1 = CC_DST + 1; + src2 = 1; + cf = CC_SRC; + pf = parity_table[(uint8_t)CC_DST]; + af = (CC_DST ^ src1 ^ src2) & 0x10; + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_all_shl, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + + cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C; + pf = parity_table[(uint8_t)CC_DST]; + af = 0; /* undefined */ + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + /* of is defined if shift count == 1 */ + of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +static int glue(compute_c_shl, SUFFIX)(void) +{ + return (CC_SRC >> (DATA_BITS - 1)) & CC_C; +} + +#if DATA_BITS == 32 +static int glue(compute_c_sar, SUFFIX)(void) +{ + return CC_SRC & 1; +} +#endif + +static int glue(compute_all_sar, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + + cf = CC_SRC & 1; + pf = parity_table[(uint8_t)CC_DST]; + af = 0; /* undefined */ + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + /* of is defined if shift count == 1 */ + of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O; + return cf | pf | af | zf | sf | of; +} + +#if DATA_BITS == 32 +static int glue(compute_c_mul, SUFFIX)(void) +{ + int cf; + + cf = (CC_SRC != 0); + return cf; +} +#endif + +/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and + CF are modified and it is slower to do that. */ +static int glue(compute_all_mul, SUFFIX)(void) +{ + int cf, pf, af, zf, sf, of; + + cf = (CC_SRC != 0); + pf = parity_table[(uint8_t)CC_DST]; + af = 0; /* undefined */ + zf = ((DATA_TYPE)CC_DST == 0) << 6; + sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; + of = cf << 11; + return cf | pf | af | zf | sf | of; +} + +#undef DATA_BITS +#undef SIGN_MASK +#undef DATA_TYPE +#undef DATA_MASK +#undef SUFFIX -- cgit v1.1