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| author | Richard Henderson <rth@twiddle.net> | 2013-01-23 16:03:16 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-02-18 15:39:09 -0800 |
| commit | 988c3eb0d6f41ac13f4ec145c637f12c776de602 (patch) | |
| tree | 870e54c572872d4a04c06722b803fdb48e387e66 /target-i386/cc_helper_template.h | |
| parent | db9f2597722d5d8bc5f2330f186288d893114338 (diff) | |
| download | qemu-988c3eb0d6f41ac13f4ec145c637f12c776de602.tar.gz | |
target-i386: Use CC_SRC2 for ADC and SBB
Add another slot in ENV and store two of the three inputs. This lets us
do less work when carry-out is not needed, and avoids the unpredictable
CC_OP after translating these insns.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386/cc_helper_template.h')
| -rw-r--r-- | target-i386/cc_helper_template.h | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/target-i386/cc_helper_template.h b/target-i386/cc_helper_template.h index 522b462285..87f47d2e97 100644 --- a/target-i386/cc_helper_template.h +++ b/target-i386/cc_helper_template.h @@ -58,12 +58,13 @@ static int glue(compute_c_add, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) return dst < src1; } -static int glue(compute_all_adc, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) +static int glue(compute_all_adc, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1, + DATA_TYPE src3) { int cf, pf, af, zf, sf, of; - DATA_TYPE src2 = dst - src1 - 1; + DATA_TYPE src2 = dst - src1 - src3; - cf = dst <= src1; + cf = (src3 ? dst <= src1 : dst < src1); pf = parity_table[(uint8_t)dst]; af = (dst ^ src1 ^ src2) & 0x10; zf = (dst == 0) << 6; @@ -72,9 +73,10 @@ static int glue(compute_all_adc, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) return cf | pf | af | zf | sf | of; } -static int glue(compute_c_adc, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) +static int glue(compute_c_adc, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1, + DATA_TYPE src3) { - return dst <= src1; + return src3 ? dst <= src1 : dst < src1; } static int glue(compute_all_sub, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2) @@ -98,12 +100,13 @@ static int glue(compute_c_sub, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2) return src1 < src2; } -static int glue(compute_all_sbb, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2) +static int glue(compute_all_sbb, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2, + DATA_TYPE src3) { int cf, pf, af, zf, sf, of; - DATA_TYPE src1 = dst + src2 + 1; + DATA_TYPE src1 = dst + src2 + src3; - cf = src1 <= src2; + cf = (src3 ? src1 <= src2 : src1 < src2); pf = parity_table[(uint8_t)dst]; af = (dst ^ src1 ^ src2) & 0x10; zf = (dst == 0) << 6; @@ -112,11 +115,12 @@ static int glue(compute_all_sbb, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2) return cf | pf | af | zf | sf | of; } -static int glue(compute_c_sbb, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2) +static int glue(compute_c_sbb, SUFFIX)(DATA_TYPE dst, DATA_TYPE src2, + DATA_TYPE src3) { - DATA_TYPE src1 = dst + src2 + 1; + DATA_TYPE src1 = dst + src2 + src3; - return src1 <= src2; + return (src3 ? src1 <= src2 : src1 < src2); } static int glue(compute_all_logic, SUFFIX)(DATA_TYPE dst, DATA_TYPE src1) |