Commit 8e33c08c84b9f418dee69f79e7b579c59e77814b
1 parent
197ea35a
MIPS FPU support for the gdb stub, by Daniel Jacobowitz.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2242 c046a42c-6fe2-441c-8c8c-71466251a162
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gdbstub.c
| @@ -532,11 +532,37 @@ static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | @@ -532,11 +532,37 @@ static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | ||
| 532 | *(uint32_t *)ptr = tswapl(env->PC); | 532 | *(uint32_t *)ptr = tswapl(env->PC); |
| 533 | ptr += 4; | 533 | ptr += 4; |
| 534 | 534 | ||
| 535 | +#ifdef MIPS_USES_FPU | ||
| 536 | + for (i = 0; i < 32; i++) | ||
| 537 | + { | ||
| 538 | + *(uint32_t *)ptr = tswapl(FPR_W (env, i)); | ||
| 539 | + ptr += 4; | ||
| 540 | + } | ||
| 541 | + | ||
| 542 | + *(uint32_t *)ptr = tswapl(env->fcr31); | ||
| 543 | + ptr += 4; | ||
| 544 | + | ||
| 545 | + *(uint32_t *)ptr = tswapl(env->fcr0); | ||
| 546 | + ptr += 4; | ||
| 547 | +#endif | ||
| 548 | + | ||
| 535 | /* 32 FP registers, fsr, fir, fp. Not yet implemented. */ | 549 | /* 32 FP registers, fsr, fir, fp. Not yet implemented. */ |
| 550 | + /* what's 'fp' mean here? */ | ||
| 536 | 551 | ||
| 537 | return ptr - mem_buf; | 552 | return ptr - mem_buf; |
| 538 | } | 553 | } |
| 539 | 554 | ||
| 555 | +/* convert MIPS rounding mode in FCR31 to IEEE library */ | ||
| 556 | +static unsigned int ieee_rm[] = | ||
| 557 | + { | ||
| 558 | + float_round_nearest_even, | ||
| 559 | + float_round_to_zero, | ||
| 560 | + float_round_up, | ||
| 561 | + float_round_down | ||
| 562 | + }; | ||
| 563 | +#define RESTORE_ROUNDING_MODE \ | ||
| 564 | + set_float_rounding_mode(ieee_rm[env->fcr31 & 3], &env->fp_status) | ||
| 565 | + | ||
| 540 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | 566 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
| 541 | { | 567 | { |
| 542 | int i; | 568 | int i; |
| @@ -566,6 +592,28 @@ static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | @@ -566,6 +592,28 @@ static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | ||
| 566 | 592 | ||
| 567 | env->PC = tswapl(*(uint32_t *)ptr); | 593 | env->PC = tswapl(*(uint32_t *)ptr); |
| 568 | ptr += 4; | 594 | ptr += 4; |
| 595 | + | ||
| 596 | +#ifdef MIPS_USES_FPU | ||
| 597 | + for (i = 0; i < 32; i++) | ||
| 598 | + { | ||
| 599 | + FPR_W (env, i) = tswapl(*(uint32_t *)ptr); | ||
| 600 | + ptr += 4; | ||
| 601 | + } | ||
| 602 | + | ||
| 603 | + env->fcr31 = tswapl(*(uint32_t *)ptr) & 0x0183FFFF; | ||
| 604 | + ptr += 4; | ||
| 605 | + | ||
| 606 | + env->fcr0 = tswapl(*(uint32_t *)ptr); | ||
| 607 | + ptr += 4; | ||
| 608 | + | ||
| 609 | + /* set rounding mode */ | ||
| 610 | + RESTORE_ROUNDING_MODE; | ||
| 611 | + | ||
| 612 | +#ifndef CONFIG_SOFTFLOAT | ||
| 613 | + /* no floating point exception for native float */ | ||
| 614 | + SET_FP_ENABLE(env->fcr31, 0); | ||
| 615 | +#endif | ||
| 616 | +#endif | ||
| 569 | } | 617 | } |
| 570 | #elif defined (TARGET_SH4) | 618 | #elif defined (TARGET_SH4) |
| 571 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | 619 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |