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authorRichard Henderson <rth@twiddle.net>2013-01-23 16:03:16 -0800
committerRichard Henderson <rth@twiddle.net>2013-02-18 15:39:09 -0800
commit988c3eb0d6f41ac13f4ec145c637f12c776de602 (patch)
tree870e54c572872d4a04c06722b803fdb48e387e66 /target-i386/cc_helper_template.h
parentdb9f2597722d5d8bc5f2330f186288d893114338 (diff)
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.h26
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)