dawids/lang-bootstrap
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

codegen for dereference, subscript

Browse source
This commit is contained in:
pommicket 2022-02-12 13:53:35 -05:00
parent 0a14c8ca2a
commit 0ee06ac2c4
4 changed files with 90 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

26
05/parse.b
View file

@ -2641,6 +2641,7 @@ function parse_expression
if *1p == TYPE_POINTER goto type_long ; pointer difference
goto type_binary_left ; pointer minus integer
:type_subscript
; @NONSTANDARD: technically 1["hello"] is legal. but why
type_decay_array_to_pointer_in_place(a)
p = types + b
if *1p > TYPE_UNSIGNED_LONG goto subscript_non_integer
@ -3075,10 +3076,13 @@ function parse_expression
; it is a global variable
*1out = EXPRESSION_GLOBAL_VARIABLE
out += 4
*4out = c > 32 ; extract type
a = c > 32 ; extract type
*4out = type_create_copy(a)
out += 4
*4out = c & 0xffffffff ; extract address
out += 4
*4out = type_is_array(a)
out += 4
*8out = c & 0xffffffff ; extract address
out += 8
return out
:not_global
@ -3103,11 +3107,14 @@ function parse_expression
; it's a local variable
*1out = EXPRESSION_LOCAL_VARIABLE
out += 4
*4out = c > 32 ; extract type
a = c > 32 ; extract type
*4out = type_create_copy(a)
out += 4
c &= 0xffffffff ; extract rbp offset
*4out = c
out += 4
*4out = type_is_array(a)
out += 4
c &= 0xffffffff
*8out = sign_extend_32_to_64(c) ; extract rbp offset
out += 8
return out
:expression_integer
*1out = EXPRESSION_CONSTANT_INT
@ -4100,7 +4107,8 @@ function print_expression
:print_local_variable
puts(.str_local_prefix)
expression += 8
putn_with_sign(*8expression)
b = sign_extend_32_to_64(*4expression)
putn_with_sign(b)
putc('])
expression += 8
return expression
@ -4115,7 +4123,7 @@ function print_expression
:print_global_variable
puts(.str_global_at)
expression += 8
putx32(*8expression)
putx32(*4expression)
expression += 8
return expression
:print_cast