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practically done eval

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This commit is contained in:
pommicket 2022-01-23 10:55:57 -05:00
parent aa0fbb9caf
commit b4451ff1b9
2 changed files with 75 additions and 33 deletions
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2
05/main.c
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@ -3,5 +3,5 @@
long double d;
} (*x)(void);
*/
typedef long int unsigned Foo[3 != 3];
typedef long int unsigned Foo[5|0];
/* */

106
05/parse.b
View file

@ -943,6 +943,7 @@ function evaluate_constant_expression
argument p_value
local a
local b
local c
local p
local mask
local type
@ -950,26 +951,35 @@ function evaluate_constant_expression
type = expr + 4
type = *4type
if *1expr == EXPRESSION_CONSTANT_INT goto eval_constant_int
if *1expr == EXPRESSION_IDENTIFIER goto eval_constant_identifier
if *1expr == EXPRESSION_UNARY_PLUS goto eval_unary_plus
if *1expr == EXPRESSION_UNARY_MINUS goto eval_unary_minus
if *1expr == EXPRESSION_BITWISE_NOT goto eval_bitwise_not
if *1expr == EXPRESSION_LOGICAL_NOT goto eval_logical_not
if *1expr == EXPRESSION_CAST goto eval_todo ; @TODO
if *1expr == EXPRESSION_ADD goto eval_add
if *1expr == EXPRESSION_SUB goto eval_sub
if *1expr == EXPRESSION_MUL goto eval_mul
if *1expr == EXPRESSION_DIV goto eval_div
if *1expr == EXPRESSION_REMAINDER goto eval_remainder
if *1expr == EXPRESSION_LSHIFT goto eval_lshift
if *1expr == EXPRESSION_RSHIFT goto eval_rshift
if *1expr == EXPRESSION_EQ goto eval_eq
if *1expr == EXPRESSION_NEQ goto eval_neq
if *1expr == EXPRESSION_LT goto eval_lt
if *1expr == EXPRESSION_GT goto eval_gt
if *1expr == EXPRESSION_LEQ goto eval_leq
if *1expr == EXPRESSION_GEQ goto eval_geq
c = *1expr
if c == EXPRESSION_CONSTANT_INT goto eval_constant_int
if c == EXPRESSION_IDENTIFIER goto eval_constant_identifier
if c == EXPRESSION_UNARY_PLUS goto eval_unary_plus
if c == EXPRESSION_UNARY_MINUS goto eval_unary_minus
if c == EXPRESSION_BITWISE_NOT goto eval_bitwise_not
if c == EXPRESSION_LOGICAL_NOT goto eval_logical_not
if c == EXPRESSION_CAST goto eval_todo ; @TODO
if c == EXPRESSION_ADD goto eval_add
if c == EXPRESSION_SUB goto eval_sub
if c == EXPRESSION_MUL goto eval_mul
if c == EXPRESSION_DIV goto eval_div
if c == EXPRESSION_REMAINDER goto eval_remainder
if c == EXPRESSION_LSHIFT goto eval_lshift
if c == EXPRESSION_RSHIFT goto eval_rshift
if c == EXPRESSION_EQ goto eval_eq
if c == EXPRESSION_NEQ goto eval_neq
if c == EXPRESSION_LT goto eval_lt
if c == EXPRESSION_GT goto eval_gt
if c == EXPRESSION_LEQ goto eval_leq
if c == EXPRESSION_GEQ goto eval_geq
if c == EXPRESSION_BITWISE_AND goto eval_bitwise_and
if c == EXPRESSION_BITWISE_OR goto eval_bitwise_or
if c == EXPRESSION_BITWISE_XOR goto eval_bitwise_xor
if c == EXPRESSION_LOGICAL_AND goto eval_logical_and
if c == EXPRESSION_LOGICAL_OR goto eval_logical_or
if c == EXPRESSION_CONDITIONAL goto eval_todo ; @TODO
byte 0xcc
:eval_todo
@ -1009,12 +1019,8 @@ function evaluate_constant_expression
:eval_logical_not
expr += 8
expr = evaluate_constant_expression(expr, &a)
if a == 0 goto eval_logical_not0
*8p_value = 0
return expr
:eval_logical_not0
*8p_value = 1
return expr
if a == 0 goto eval_value_1
goto eval_value_0
:eval_add
expr += 8
expr = evaluate_constant_expression(expr, &a)
@ -1141,16 +1147,52 @@ function evaluate_constant_expression
mask &= 4
goto eval_comparison_done
:eval_comparison_done
if mask != 0 goto eval_comparison1
*8p_value = 0
return expr
:eval_comparison1
*8p_value = 1
return expr
if mask != 0 goto eval_value_1
goto eval_value_0
:eval_bitwise_and
expr += 8
expr = evaluate_constant_expression(expr, &a)
expr = evaluate_constant_expression(expr, &b)
*8p_value = a & b
goto eval_fit_to_type
:eval_bitwise_or
expr += 8
expr = evaluate_constant_expression(expr, &a)
expr = evaluate_constant_expression(expr, &b)
*8p_value = a | b
goto eval_fit_to_type
:eval_bitwise_xor
expr += 8
expr = evaluate_constant_expression(expr, &a)
expr = evaluate_constant_expression(expr, &b)
*8p_value = a ^ b
goto eval_fit_to_type
:eval_logical_and
expr += 8
expr = evaluate_constant_expression(expr, &a)
if a == 0 goto eval_value_0
expr = evaluate_constant_expression(expr, &b)
if b == 0 goto eval_value_0
goto eval_value_1
:eval_logical_or
expr += 8
expr = evaluate_constant_expression(expr, &a)
if a != 0 goto eval_value_1
expr = evaluate_constant_expression(expr, &b)
if b != 0 goto eval_value_1
goto eval_value_0
:eval_fit_to_type
*8p_value = fit_to_type(*8p_value, type)
return expr
:eval_value_0
*8p_value = 0
return expr
:eval_value_1
*8p_value = 1
return expr
; value is the output of some arithmetic expression; correct it to be within the range of type.
function fit_to_type