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target-alpha: Use extract to get insn fields 

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-03-19 14:31:17 -07:00
parent 0e154fe92c
commit a9e05a1ceb
1 changed files with 22 additions and 27 deletions
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49
target-alpha/translate.c
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@ -1387,11 +1387,7 @@ static ExitStatus gen_mtpr(DisasContext *ctx, TCGv vb, int regno)
static ExitStatus translate_one(DisasContext *ctx, uint32_t insn) static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
{ {
uint32_t palcode; int32_t disp21, disp16, disp12 __attribute__((unused));
int32_t disp21, disp16;
#ifndef CONFIG_USER_ONLY
int32_t disp12;
#endif
uint16_t fn11; uint16_t fn11;
uint8_t opc, ra, rb, rc, fpfn, fn7, lit; uint8_t opc, ra, rb, rc, fpfn, fn7, lit;
bool islit; bool islit;
@ -1400,34 +1396,31 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
ExitStatus ret; ExitStatus ret;
/* Decode all instruction fields */ /* Decode all instruction fields */
opc = insn >> 26; opc = extract32(insn, 26, 6);
ra = (insn >> 21) & 0x1F; ra = extract32(insn, 21, 5);
rb = (insn >> 16) & 0x1F; rb = extract32(insn, 16, 5);
rc = insn & 0x1F; rc = extract32(insn, 0, 5);
islit = (insn >> 12) & 1; islit = extract32(insn, 12, 1);
lit = extract32(insn, 13, 8);
disp21 = sextract32(insn, 0, 21);
disp16 = sextract32(insn, 0, 16);
disp12 = sextract32(insn, 0, 12);
fn11 = extract32(insn, 5, 11);
fpfn = extract32(insn, 5, 6);
fn7 = extract32(insn, 5, 7);
if (rb == 31 && !islit) { if (rb == 31 && !islit) {
islit = 1; islit = true;
lit = 0; lit = 0;
} else {
lit = (insn >> 13) & 0xFF;
} }
palcode = insn & 0x03FFFFFF;
disp21 = ((int32_t)((insn & 0x001FFFFF) << 11)) >> 11;
disp16 = (int16_t)(insn & 0x0000FFFF);
#ifndef CONFIG_USER_ONLY
disp12 = (int32_t)((insn & 0x00000FFF) << 20) >> 20;
#endif
fn11 = (insn >> 5) & 0x000007FF;
fpfn = fn11 & 0x3F;
fn7 = (insn >> 5) & 0x0000007F;
LOG_DISAS("opc %02x ra %2d rb %2d rc %2d disp16 %6d\n",
opc, ra, rb, rc, disp16);
ret = NO_EXIT; ret = NO_EXIT;
switch (opc) { switch (opc) {
case 0x00: case 0x00:
/* CALL_PAL */ /* CALL_PAL */
ret = gen_call_pal(ctx, palcode); ret = gen_call_pal(ctx, insn & 0x03ffffff);
break; break;
case 0x01: case 0x01:
/* OPC01 */ /* OPC01 */
@ -2313,7 +2306,8 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
REQUIRE_TB_FLAG(TB_FLAGS_PAL_MODE); REQUIRE_TB_FLAG(TB_FLAGS_PAL_MODE);
va = dest_gpr(ctx, ra); va = dest_gpr(ctx, ra);
return gen_mfpr(va, insn & 0xffff); ret = gen_mfpr(va, insn & 0xffff);
break;
#else #else
goto invalid_opc; goto invalid_opc;
#endif #endif
@ -2548,7 +2542,8 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
REQUIRE_TB_FLAG(TB_FLAGS_PAL_MODE); REQUIRE_TB_FLAG(TB_FLAGS_PAL_MODE);
vb = load_gpr(ctx, rb); vb = load_gpr(ctx, rb);
return gen_mtpr(ctx, vb, insn & 0xffff); ret = gen_mtpr(ctx, vb, insn & 0xffff);
break;
#else #else
goto invalid_opc; goto invalid_opc;
#endif #endif