diff options
Diffstat (limited to 'gcc/config/i860/i860.c')
| -rw-r--r-- | gcc/config/i860/i860.c | 93 |
1 files changed, 88 insertions, 5 deletions
diff --git a/gcc/config/i860/i860.c b/gcc/config/i860/i860.c index f4ecdb2..5fcf7a2 100644 --- a/gcc/config/i860/i860.c +++ b/gcc/config/i860/i860.c @@ -2039,15 +2039,49 @@ function_prologue (asm_file, local_bytes) instruction, so what the hell. */ +/* This corresponds to a version 4 TDESC structure. Lower numbered + versions successively omit the last word of the structure. We + don't try to handle version 5 here. */ + +typedef struct TDESC_flags { + int version:4; + int reg_packing:1; + int callable_block:1; + int reserved:4; + int fregs:6; /* fp regs 2-7 */ + int iregs:16; /* regs 0-15 */ +} TDESC_flags; + +typedef struct TDESC { + TDESC_flags flags; + int integer_reg_offset; /* same as must_preserve_bytes */ + int floating_point_reg_offset; + unsigned int positive_frame_size; /* same as frame_upper_bytes */ + unsigned int negative_frame_size; /* same as frame_lower_bytes */ +} TDESC; + void function_epilogue (asm_file, local_bytes) register FILE *asm_file; register unsigned local_bytes; { register unsigned frame_upper_bytes; + register unsigned frame_lower_bytes; register unsigned preserved_reg_bytes = 0; register unsigned i; register unsigned restored_so_far = 0; + register unsigned int_restored; + register unsigned mask; + unsigned intflags=0; + register TDESC_flags *flags = (TDESC_flags *) &intflags; + + flags->version = 4; + flags->reg_packing = 1; + flags->iregs = 8; /* old fp always gets saved */ + + /* Round-up the frame_lower_bytes so that it's a multiple of 16. */ + + frame_lower_bytes = (local_bytes + STACK_ALIGNMENT - 1) & -STACK_ALIGNMENT; /* Count the number of registers that were preserved in the prologue. Ignore r0. It is never preserved. */ @@ -2071,17 +2105,31 @@ function_epilogue (asm_file, local_bytes) /* Restore all of the "preserved" registers that need restoring. */ - for (i = 1; i < 32; i++) - if (regs_ever_live[i] && ! call_used_regs[i]) + mask = 2; + + for (i = 1; i < 32; i++, mask<<=1) + if (regs_ever_live[i] && ! call_used_regs[i]) { fprintf (asm_file, "\tld.l %d(%sfp),%s%s\n", must_preserve_bytes + (4 * restored_so_far++), i860_reg_prefix, i860_reg_prefix, reg_names[i]); + if (i > 3 && i < 16) + flags->iregs |= mask; + } + + int_restored = restored_so_far; + mask = 1; - for (i = 32; i < 64; i++) - if (regs_ever_live[i] && ! call_used_regs[i]) + for (i = 32; i < 64; i++) { + if (regs_ever_live[i] && ! call_used_regs[i]) { fprintf (asm_file, "\tfld.l %d(%sfp),%s%s\n", must_preserve_bytes + (4 * restored_so_far++), i860_reg_prefix, i860_reg_prefix, reg_names[i]); + if (i > 33 & i < 40) + flags->fregs |= mask; + } + if (i > 33 && i < 40) + mask<<=1; + } /* Get the value we plan to use to restore the stack pointer into r31. */ @@ -2090,9 +2138,11 @@ function_epilogue (asm_file, local_bytes) /* Restore the return address and the old frame pointer. */ - if (must_preserve_r1) + if (must_preserve_r1) { fprintf (asm_file, "\tld.l 4(%sfp),%sr1\n", i860_reg_prefix, i860_reg_prefix); + flags->iregs |= 2; + } fprintf (asm_file, "\tld.l 0(%sfp),%sfp\n", i860_reg_prefix, i860_reg_prefix); @@ -2101,4 +2151,37 @@ function_epilogue (asm_file, local_bytes) fprintf (asm_file, "\tbri %sr1\n\tmov %sr31,%ssp\n", i860_reg_prefix, i860_reg_prefix, i860_reg_prefix); + +#ifdef OUTPUT_TDESC /* Output an ABI-compliant TDESC entry */ + if (! frame_lower_bytes) { + flags->version--; + if (! frame_upper_bytes) { + flags->version--; + if (restored_so_far == int_restored) /* No FP saves */ + flags->version--; + } + } + assemble_name(asm_file,current_function_original_name); + fputs(".TDESC:\n", asm_file); + fprintf(asm_file, "%s 0x%0x\n", ASM_LONG, intflags); + fprintf(asm_file, "%s %d\n", ASM_LONG, + int_restored ? must_preserve_bytes : 0); + if (flags->version > 1) { + fprintf(asm_file, "%s %d\n", ASM_LONG, + (restored_so_far == int_restored) ? 0 : must_preserve_bytes + + (4 * int_restored)); + if (flags->version > 2) { + fprintf(asm_file, "%s %d\n", ASM_LONG, frame_upper_bytes); + if (flags->version > 3) + fprintf(asm_file, "%s %d\n", ASM_LONG, frame_lower_bytes); + } + } + tdesc_section(); + fprintf(asm_file, "%s ", ASM_LONG); + assemble_name(asm_file, current_function_original_name); + fprintf(asm_file, "\n%s ", ASM_LONG); + assemble_name(asm_file, current_function_original_name); + fputs(".TDESC\n", asm_file); + text_section(); +#endif } |