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https://github.com/mirror/tinycc.git
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124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*************************************************************/
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/*
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* ARM dummy assembler for TCC
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*
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*/
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#ifdef TARGET_DEFS_ONLY
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#define CONFIG_TCC_ASM
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#define NB_ASM_REGS 16
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ST_FUNC void g(int c);
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ST_FUNC void gen_le16(int c);
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ST_FUNC void gen_le32(int c);
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/*************************************************************/
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#else
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/*************************************************************/
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#define USING_GLOBALS
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#include "tcc.h"
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static void asm_error(void)
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{
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tcc_error("ARM asm not implemented.");
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}
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/* XXX: make it faster ? */
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ST_FUNC void g(int c)
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{
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int ind1;
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if (nocode_wanted)
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return;
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ind1 = ind + 1;
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if (ind1 > cur_text_section->data_allocated)
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section_realloc(cur_text_section, ind1);
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cur_text_section->data[ind] = c;
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ind = ind1;
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}
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ST_FUNC void gen_le16 (int i)
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{
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g(i);
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g(i>>8);
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}
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ST_FUNC void gen_le32 (int i)
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{
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gen_le16(i);
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gen_le16(i>>16);
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}
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ST_FUNC void gen_expr32(ExprValue *pe)
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{
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gen_le32(pe->v);
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}
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ST_FUNC void asm_opcode(TCCState *s1, int opcode)
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{
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asm_error();
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}
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ST_FUNC void subst_asm_operand(CString *add_str, SValue *sv, int modifier)
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{
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asm_error();
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}
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/* generate prolog and epilog code for asm statement */
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ST_FUNC void asm_gen_code(ASMOperand *operands, int nb_operands,
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int nb_outputs, int is_output,
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uint8_t *clobber_regs,
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int out_reg)
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{
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}
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ST_FUNC void asm_compute_constraints(ASMOperand *operands,
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int nb_operands, int nb_outputs,
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const uint8_t *clobber_regs,
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int *pout_reg)
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{
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}
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ST_FUNC void asm_clobber(uint8_t *clobber_regs, const char *str)
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{
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int reg;
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TokenSym *ts;
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if (!strcmp(str, "memory") ||
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!strcmp(str, "cc") ||
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!strcmp(str, "flags"))
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return;
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ts = tok_alloc(str, strlen(str));
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reg = asm_parse_regvar(ts->tok);
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if (reg == -1) {
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tcc_error("invalid clobber register '%s'", str);
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}
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clobber_regs[reg] = 1;
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}
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/* If T refers to a register then return the register number and type.
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Otherwise return -1. */
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ST_FUNC int asm_parse_regvar (int t)
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{
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if (t >= TOK_ASM_r0 && t <= TOK_ASM_pc) { /* register name */
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switch (t) {
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case TOK_ASM_fp:
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return TOK_ASM_r11 - TOK_ASM_r0;
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case TOK_ASM_ip:
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return TOK_ASM_r12 - TOK_ASM_r0;
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case TOK_ASM_sp:
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return TOK_ASM_r13 - TOK_ASM_r0;
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case TOK_ASM_lr:
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return TOK_ASM_r14 - TOK_ASM_r0;
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case TOK_ASM_pc:
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return TOK_ASM_r15 - TOK_ASM_r0;
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default:
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return t - TOK_ASM_r0;
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}
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} else
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return -1;
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}
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/*************************************************************/
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#endif /* ndef TARGET_DEFS_ONLY */
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