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hw/scsi/lsi53c895a: Use sextract32 for sign-extension

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Use sextract32() for doing sign-extension rather than rolling
our own implementation.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Maydell 2013-08-23 17:16:32 +01:00 committed by Paolo Bonzini
parent c24e7517ee
commit 927941059b
1 changed files with 5 additions and 11 deletions
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16
hw/scsi/lsi53c895a.c
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@ -998,12 +998,6 @@ bad:
s->msg_action = 0;
}
/* Sign extend a 24-bit value. */
static inline int32_t sxt24(int32_t n)
{
return (n << 8) >> 8;
}
#define LSI_BUF_SIZE 4096
static void lsi_memcpy(LSIState *s, uint32_t dest, uint32_t src, int count)
{
@ -1083,7 +1077,7 @@ again:
/* Table indirect addressing. */
/* 32-bit Table indirect */
offset = sxt24(addr);
offset = sextract32(addr, 0, 24);
pci_dma_read(pci_dev, s->dsa + offset, buf, 8);
/* byte count is stored in bits 0:23 only */
s->dbc = cpu_to_le32(buf[0]) & 0xffffff;
@ -1183,13 +1177,13 @@ again:
uint32_t id;
if (insn & (1 << 25)) {
id = read_dword(s, s->dsa + sxt24(insn));
id = read_dword(s, s->dsa + sextract32(insn, 0, 24));
} else {
id = insn;
}
id = (id >> 16) & 0xf;
if (insn & (1 << 26)) {
addr = s->dsp + sxt24(addr);
addr = s->dsp + sextract32(addr, 0, 24);
}
s->dnad = addr;
switch (opcode) {
@ -1385,7 +1379,7 @@ again:
if (cond == jmp) {
if (insn & (1 << 23)) {
/* Relative address. */
addr = s->dsp + sxt24(addr);
addr = s->dsp + sextract32(addr, 0, 24);
}
switch ((insn >> 27) & 7) {
case 0: /* Jump */
@ -1438,7 +1432,7 @@ again:
int i;
if (insn & (1 << 28)) {
addr = s->dsa + sxt24(addr);
addr = s->dsa + sextract32(addr, 0, 24);
}
n = (insn & 7);
reg = (insn >> 16) & 0xff;