diff options
Diffstat (limited to 'gas/config/tc-i386.c')
| -rw-r--r-- | gas/config/tc-i386.c | 81 |
1 files changed, 80 insertions, 1 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index c11f052..d915b15 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -788,7 +788,7 @@ i386_cpu_flags cpu_arch_isa_flags; /* If set, conditional jumps are not automatically promoted to handle larger than a byte offset. */ -static unsigned int no_cond_jump_promotion = 0; +static bool no_cond_jump_promotion = false; /* Encode SSE instructions with VEX prefix. */ static unsigned int sse2avx; @@ -2660,6 +2660,20 @@ extend_cpu_sub_arch_name (const char *name) static void set_cpu_arch (int dummy ATTRIBUTE_UNUSED) { + typedef struct arch_stack_entry + { + const struct arch_stack_entry *prev; + const char *name; + char *sub_name; + i386_cpu_flags flags; + i386_cpu_flags isa_flags; + enum processor_type isa; + enum flag_code flag_code; + char stackop_size; + bool no_cond_jump_promotion; + } arch_stack_entry; + static const arch_stack_entry *arch_stack_top; + SKIP_WHITESPACE (); if (!is_end_of_line[(unsigned char) *input_line_pointer]) @@ -2703,6 +2717,67 @@ set_cpu_arch (int dummy ATTRIBUTE_UNUSED) j = ARRAY_SIZE (cpu_arch) + 1; } } + else if (strcmp (string, "push") == 0) + { + arch_stack_entry *top = XNEW (arch_stack_entry); + + top->name = cpu_arch_name; + if (cpu_sub_arch_name) + top->sub_name = xstrdup (cpu_sub_arch_name); + else + top->sub_name = NULL; + top->flags = cpu_arch_flags; + top->isa = cpu_arch_isa; + top->isa_flags = cpu_arch_isa_flags; + top->flag_code = flag_code; + top->stackop_size = stackop_size; + top->no_cond_jump_promotion = no_cond_jump_promotion; + + top->prev = arch_stack_top; + arch_stack_top = top; + + (void) restore_line_pointer (e); + demand_empty_rest_of_line (); + return; + } + else if (strcmp (string, "pop") == 0) + { + const arch_stack_entry *top = arch_stack_top; + + if (!top) + as_bad (_(".arch stack is empty")); + else if (top->flag_code != flag_code + || top->stackop_size != stackop_size) + { + static const unsigned int bits[] = { + [CODE_16BIT] = 16, + [CODE_32BIT] = 32, + [CODE_64BIT] = 64, + }; + + as_bad (_("this `.arch pop' requires `.code%u%s' to be in effect"), + bits[top->flag_code], + top->stackop_size == LONG_MNEM_SUFFIX ? "gcc" : ""); + } + else + { + arch_stack_top = top->prev; + + cpu_arch_name = top->name; + free (cpu_sub_arch_name); + cpu_sub_arch_name = top->sub_name; + cpu_arch_flags = top->flags; + cpu_arch_isa = top->isa; + cpu_arch_isa_flags = top->isa_flags; + no_cond_jump_promotion = top->no_cond_jump_promotion; + + XDELETE (top); + } + + (void) restore_line_pointer (e); + demand_empty_rest_of_line (); + return; + } for (; j < ARRAY_SIZE (cpu_arch); j++) { @@ -13660,6 +13735,10 @@ show_arch (FILE *stream, int ext, int check) { p = output_message (stream, p, message, start, &left, STRING_COMMA_LEN ("default")); + p = output_message (stream, p, message, start, &left, + STRING_COMMA_LEN ("push")); + p = output_message (stream, p, message, start, &left, + STRING_COMMA_LEN ("pop")); } for (j = 0; j < ARRAY_SIZE (cpu_arch); j++) |