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Add 8 bit arithmetic to sim-alu.

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Fix flags (Carry, oVerflow) for negate and subtract.
Add ALU*_RESULT macros for accessing final result of ALU op.
This commit is contained in:
Andrew Cagney 1997-10-20 02:03:06 +00:00
parent 66a6a38139
commit 0a0ecb2120
3 changed files with 15 additions and 2 deletions
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9
sim/common/ChangeLog
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@ -1,3 +1,12 @@
Thu Oct 16 11:38:56 1997 Andrew Cagney <cagney@b1.cygnus.com>
* sim-alu.h (ALU16_BEGIN, ALU32_BEGIN, ALU64_BEGIN): Drop opening
brace from macro.
(ALU8_BEGIN, ALU8_SET, ALU8_ADD, ALU8_SUB, ALU8_NEGATE): Define.
(ALU16_ADD, ALU16_SUB, ALU16_NEGATE): Simplify arrithmetic.
(ALU32_ADD, ALU32_SUB, ALU32_NEGATE): Simplify arrithmetic.
(ALU64_ADD, ALU64_SUB, ALU64_NEGATE): Simplify arrithmetic.
Wed Oct 15 09:24:19 1997 Andrew Cagney <cagney@b1.cygnus.com>
* sim-core.h (struct _sim_core_mapping): Change free_buffer to

4
sim/tic80/ChangeLog
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@ -1,3 +1,7 @@
Fri Oct 17 17:26:36 1997 Andrew Cagney <cagney@b1.cygnus.com>
* alu.h (ALU32_END): Use ALU32_RESULT.
Mon Sep 29 12:49:06 1997 Andrew Cagney <cagney@b1.cygnus.com>
* insns (get_fp_reg, set_fp_reg): Update to use changed sim_fpu

4
sim/tic80/alu.h
View file

@ -27,8 +27,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define ALU32_END(TARG) \
{ \
(TARG) = (unsigned32)alu_carry_val; /* FIXME */ \
}}
(TARG) = ALU32_RESULT; /* FIXME */ \
}
#define ALU_END(TARG) ALU32_END(TARG)