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* Changes to sky PKE sim to calculate word-precision source-addresses 

for VU memory tracking tables.

Thu May  7 12:15:41 1998  Frank Ch. Eigler  <fche@cygnus.com>

	* sky-pke.c (pke_pcrel_operand_bits): Compute word-resolution
	source address for UNPACK into VU MEM.
	(pke_code_mpg): Ditto for MPG into VU uMEM.
This commit is contained in:
Frank Ch. Eigler 1998-05-07 17:50:18 +00:00
parent a5c3c53c34
commit a1d609b4fe
1 changed files with 21 additions and 5 deletions
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26
sim/mips/sky-pke.c
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@ -1036,9 +1036,10 @@ pke_pcrel_operand(struct pke_device* me, int operand_num)
/* Return a bit-field extract of given operand# in FIFO, and its
source-addr. `bit_offset' starts at 0, referring to LSB after PKE
instruction word. Width must be >0, <=32. Assume FIFO is full
enough. Skip over DMA tags, but mark them as an error (ER0). */
word-accurate source-addr. `bit_offset' starts at 0, referring to
LSB after PKE instruction word. Width must be >0, <=32. Assume
FIFO is full enough. Skip over DMA tags, but mark them as an error
(ER0). */
unsigned_4
pke_pcrel_operand_bits(struct pke_device* me, int bit_offset, int bit_width, unsigned_4* source_addr)
@ -1047,6 +1048,7 @@ pke_pcrel_operand_bits(struct pke_device* me, int bit_offset, int bit_width, uns
unsigned_4 value;
struct fifo_quadword* fifo_operand;
int wordnumber, bitnumber;
int i;
wordnumber = bit_offset/32;
bitnumber = bit_offset%32;
@ -1061,6 +1063,11 @@ pke_pcrel_operand_bits(struct pke_device* me, int bit_offset, int bit_width, uns
/* extract source addr from fifo word */
*source_addr = fifo_operand->source_address;
/* add word offset */
for(i=0; i<3; i++)
if(word == & fifo_operand->data[i])
*source_addr += sizeof(unsigned_4) * i;
return value;
}
@ -1676,6 +1683,7 @@ pke_code_mpg(struct pke_device* me, unsigned_4 pkecode)
address_word vu_addr_max_size;
unsigned_4 vu_lower_opcode, vu_upper_opcode;
unsigned_4* operand;
unsigned_4 source_addr;
struct fifo_quadword* fq;
int next_num;
@ -1704,7 +1712,15 @@ pke_code_mpg(struct pke_device* me, unsigned_4 pkecode)
/* Fetch operand words; assume they are already little-endian for VU imem */
fq = pke_pcrel_fifo(me, i*2 + 1, & operand);
vu_lower_opcode = *operand;
vu_upper_opcode = *pke_pcrel_operand(me, i*2 + 2);
source_addr = fq->source_address;
/* add word offset */
for(i=0; i<3; i++)
if(operand == & fq->data[i])
source_addr += sizeof(unsigned_4) * i;
fq = pke_pcrel_fifo(me, i*2 + 2, & operand);
vu_upper_opcode = *operand;
/* write data into VU memory */
/* lower (scalar) opcode comes in first word ; macro performs H2T! */
@ -1720,7 +1736,7 @@ pke_code_mpg(struct pke_device* me, unsigned_4 pkecode)
/* write tracking address in target byte-order */
ASSERT(sizeof(unsigned_4) == 4);
PKE_MEM_WRITE(me, vutrack_addr,
& fq->source_address,
& source_addr,
4);
} /* VU xfer loop */