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A little more meat on the X86FPU bones

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This commit is contained in:
Jeff Parsons 2015-11-15 11:13:59 -08:00
commit a1556df5a5
14 changed files with 801 additions and 81 deletions
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8
modules/pcjs/lib/x86.js
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@ -524,6 +524,7 @@ var X86 = {
FPU: {
MODEL_8087: 8087,
MODEL_80287: 80287,
MODEL_80287XL: 80387, // internally, the 80287XL was an 80387SX, so I'm not sure we really want/need a unique identifier
MODEL_80387: 80387,
CONTROL: { // FPU Control Word
IM: 0x0001, // bit 0: Invalid Operation Mask
@ -532,13 +533,15 @@ var X86 = {
OM: 0x0008, // bit 3: Overflow Mask
UM: 0x0010, // bit 4: Underflow Mask
PM: 0x0020, // bit 5: Precision Mask
EXC: 0x003F, // all of the above exceptions
// bit 6: unused
IEM: 0x0080, // bit 7: Interrupt Enable Mask (0 enables interrupts, 1 masks them; 8087 only)
PC: 0x0300, // bits 8-9: Precision Control
RC: 0x0C00, // bits 10-11: Rounding Control
IC: 0x1000, // bit 12: Infinity Control (0 for Projective, 1 for Affine)
// bits 13-15: unused
INIT: 0x03BF // X86.FPU.CONTROL.IM | X86.FPU.CONTROL.DM | X86.FPU.CONTROL.ZM | X86.FPU.CONTROL.OM | X86.FPU.CONTROL.UM | X86.FPU.CONTROL.PM | X86.FPU.CONTROL.IEM | X86.FPU.CONTROL.PC
INIT: 0x03BF, // X86.FPU.CONTROL.IM | X86.FPU.CONTROL.DM | X86.FPU.CONTROL.ZM | X86.FPU.CONTROL.OM | X86.FPU.CONTROL.UM | X86.FPU.CONTROL.PM | X86.FPU.CONTROL.IEM | X86.FPU.CONTROL.PC
UNUSED: 0xE040
},
STATUS: { // FPU Status Word
IE: 0x0001, // bit 0: Invalid Operation
@ -555,7 +558,8 @@ var X86 = {
C2: 0x0400, // bit 10: Condition Code 2
ST: 0x3800, // bits 11-13: Stack Top
C3: 0x4000, // bit 14: Condition Code 3
BUSY: 0x8000 // bit 15: Busy
BUSY: 0x8000, // bit 15: Busy
ST_SHIFT: 11
},
TAGS: {
VALID: 0x0,